KUBERNETES

二进制部署Kubernetes v1.11.x(1.12.x) HA可选

#!/usr/bin/env bash
set -e
# 声明集群成员信息
declare -A MasterArray otherMaster NodeArray
MasterArray=(['k8s-m1']=172.20.23.167 ['k8s-m2']=172.20.23.168 ['k8s-m3']=172.20.23.169)
otherMaster=(['k8s-m2']=172.20.23.168 ['k8s-m3']=172.20.23.169)
NodeArray=(['k8s-n1']=172.20.23.173)

export         VIP=172.20.23.4
export INGRESS_VIP=172.20.23.11
[ "${#MasterArray[@]}" -eq 1 ]  && export VIP=${MasterArray[@]} || export API_PORT=8443
export KUBE_APISERVER=https://${VIP}:${API_PORT:-6443}

#声明需要安装的的k8s版本
export KUBE_VERSION=v1.12.3

# 网卡名
export interface=ens160

export K8S_DIR=/etc/kubernetes
export PKI_DIR=${K8S_DIR}/pki
export ETCD_SSL=/etc/etcd/ssl
export MANIFESTS_DIR=/etc/kubernetes/manifests/
# cni
export CNI_URL="https://github.com/containernetworking/plugins/releases/download"
export CNI_VERSION=v0.7.4
# cfssl
export CFSSL_URL="https://pkg.cfssl.org/R1.2"
# etcd
export ETCD_version=v3.3.10

#首先在k8s-m1通过git获取部署要用到的二进制配置文件和yml
# curl  https://storage.googleapis.com/kubernetes-release/release/${KUBE_VERSION}/kubernetes-server-linux-amd64.tar.gz > kubernetes-server-linux-amd64.tar.gz
# tar -zxvf kubernetes-server-linux-amd64.tar.gz  --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}

#分发master相关组件到其他master上
#(这边不想master跑pod的话就不复制kubelet和kube-proxy过去,以及后面master节点上的kubelet的相关操作)
# for NODE in "${!otherMaster[@]}"; do
#     echo "--- $NODE ${otherMaster[$NODE]} ---"
#     scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} ${otherMaster[$NODE]}:/usr/local/bin/ 
# done
#分发node的kubernetes二进制文件
# for NODE in "${!NodeArray[@]}"; do
#     echo "--- $NODE ${NodeArray[$NODE]} ---"
#     scp /usr/local/bin/kube{let,-proxy} ${NodeArray[$NODE]}:/usr/local/bin/ 
# done

#在k81-m1下载Kubernetes CNI 二进制文件并分发
#分发cni文件到otherMaster
# mkdir -p /opt/cni/bin
# wget  "${CNI_URL}/${CNI_VERSION}/cni-plugins-amd64-${CNI_VERSION}.tgz" 
# tar -zxf cni-plugins-amd64-${CNI_VERSION}.tgz -C /opt/cni/bin

# 分发cni文件
# for NODE in "${!otherMaster[@]}"; do
#     echo "--- $NODE ${otherMaster[$NODE]} ---"
#     ssh ${otherMaster[$NODE]} 'mkdir -p /opt/cni/bin'
#     scp /opt/cni/bin/* ${otherMaster[$NODE]}:/opt/cni/bin/
# done

# #分发cni文件到node
# for NODE in "${!NodeArray[@]}"; do
#     echo "--- $NODE ${NodeArray[$NODE]} ---"
#     ssh ${NodeArray[$NODE]} 'mkdir -p /opt/cni/bin'
#     scp /opt/cni/bin/* ${NodeArray[$NODE]}:/opt/cni/bin/
# done

#在k8s-m1需要安裝CFSSL工具,这将会用來建立 TLS Certificates。
# wget "${CFSSL_URL}/cfssl_linux-amd64" -O /usr/local/bin/cfssl
# wget "${CFSSL_URL}/cfssljson_linux-amd64" -O /usr/local/bin/cfssljson
# chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson


#建立集群CA keys 与Certificates

#Etcd CA
#首先在k8s-m1建立/etc/etcd/ssl文件夹
cd ~/k8s-manual-files/pki
mkdir -p ${ETCD_SSL}

#从CSR json文件ca-config.json与etcd-ca-csr.json生成etcd的CA keys与Certificate：
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare ${ETCD_SSL}/etcd-ca

#生成Etcd证书
cfssl gencert \
  -ca=${ETCD_SSL}/etcd-ca.pem \
  -ca-key=${ETCD_SSL}/etcd-ca-key.pem \
  -config=ca-config.json \
  -hostname=127.0.0.1,$(xargs -n1<<<${MasterArray[@]} | sort  | paste -d, -s -) \
  -profile=kubernetes \
  etcd-csr.json | cfssljson -bare ${ETCD_SSL}/etcd
#-hostname值为所有masters节点的IP,如果后续master节点扩容此处可以多预留ip到证书里

#完成后删除不必要文件,确认/etc/etcd/ssl有以下文件
rm -rf ${ETCD_SSL}/*.csr
ls $ETCD_SSL
#etcd-ca-key.pem  etcd-ca.pem  etcd-key.pem  etcd.pem

#在k8s-m1上复制相关文件至其他Etcd节点,这边etcd跑在所有master节点上,所以etcd的证书复制到其他mster节点：
for NODE in "${!otherMaster[@]}"; do
    echo "--- $NODE ${otherMaster[$NODE]} ---"
    ssh ${otherMaster[$NODE]} "mkdir -p ${ETCD_SSL}"
    for FILE in etcd-ca-key.pem  etcd-ca.pem  etcd-key.pem  etcd.pem; do
      scp ${ETCD_SSL}/${FILE} ${otherMaster[$NODE]}:${ETCD_SSL}/${FILE}
    done
done

#ETCD二进制文件 
#etcd所有标准版本可以在下面url查看
#https://github.com/etcd-io/etcd/releases
#在k8s-m1上下载etcd的二进制文件,单台的话建议使用v3.1.9因为有bug
#[ "${#MasterArray[@]}" -eq 1 ] && ETCD_version=v3.3.10 || :
cd ~/k8s-manual-files

#在k8s-m1上分发etcd的二进制文件到其他master上
for NODE in "${!otherMaster[@]}"; do
    echo "--- $NODE ${otherMaster[$NODE]} ---"
    scp /usr/local/bin/etcd* ${otherMaster[$NODE]}:/usr/local/bin/
done

#在k8s-m1上配置etcd配置文件并分发相关文件
#配置文件存放在/etc/etcd/etcd.config.yml里
#注入基础变量
cd ~/k8s-manual-files/master/
etcd_servers=$( xargs -n1<<<${MasterArray[@]} | sort | sed 's#^#https://#;s#$#:2379#;$s#\n##' | paste -d, -s - )
etcd_initial_cluster=$( for i in ${!MasterArray[@]};do  echo $i=https://${MasterArray[$i]}:2380; done | sort | paste -d, -s - )
sed -ri "/initial-cluster:/s#'.+'#'${etcd_initial_cluster}'#" etc/etcd/config.yml

#分发systemd和配置文件
for NODE in "${!MasterArray[@]}"; do
    echo "--- $NODE ${MasterArray[$NODE]} ---"
    ssh ${MasterArray[$NODE]} "mkdir -p $MANIFESTS_DIR /etc/etcd /var/lib/etcd"
    scp systemd/etcd.service ${MasterArray[$NODE]}:/usr/lib/systemd/system/etcd.service
    scp etc/etcd/config.yml ${MasterArray[$NODE]}:/etc/etcd/etcd.config.yml
    ssh ${MasterArray[$NODE]} "sed -i "s/{HOSTNAME}/$NODE/g" /etc/etcd/etcd.config.yml"
    ssh ${MasterArray[$NODE]} "sed -i "s/{PUBLIC_IP}/${MasterArray[$NODE]}/g" /etc/etcd/etcd.config.yml"
    ssh ${MasterArray[$NODE]} 'systemctl daemon-reload'
done

#在k8s-m1上启动所有etcd
#etcd 进程首次启动时会等待其它节点的 etcd 加入集群，命令 systemctl start etcd 会卡住一段时间，为正常现象
#可以全部启动后后面的etcdctl命令查看状态确认正常否
for NODE in "${!MasterArray[@]}"; do
    echo "--- $NODE ${MasterArray[$NODE]} ---"
    ssh ${MasterArray[$NODE]} 'systemctl enable --now etcd' &
done
wait

#然后输出到终端了的时候多按几下回车直到等光标回到终端状态
#k8s-m1上执行下面命令验证 ETCD 集群状态,下面第二个是使用3的api去查询集群的键值
etcdctl \
   --cert-file /etc/etcd/ssl/etcd.pem \
   --key-file /etc/etcd/ssl/etcd-key.pem  \
   --ca-file /etc/etcd/ssl/etcd-ca.pem \
   --endpoints $etcd_servers cluster-health
#使用3的api去查询集群的键值
ETCDCTL_API=3 \
    etcdctl   \
    --cert=/etc/etcd/ssl/etcd.pem    \
    --key=/etc/etcd/ssl/etcd-key.pem     \
    --cacert /etc/etcd/ssl/etcd-ca.pem    \
    --endpoints $etcd_servers get / --prefix --keys-only

#Kubernetes CA
#为确保安全，kubernetes 系统各组件需要使用 x509 证书对通信进行加密和认证。
#在k8s-m1建立pki文件夹,并生成根CA凭证用于签署其它的k8s证书
mkdir -p ${PKI_DIR}
cd ~/k8s-manual-files/pki
cfssl gencert -initca ca-csr.json | cfssljson -bare ${PKI_DIR}/ca
ls ${PKI_DIR}/ca*.pem
#/etc/kubernetes/pki/ca-key.pem  /etc/kubernetes/pki/ca.pem

#API Server Certificate
#此凭证将被用于API Server和Kubelet Client通信使用,使用下面命令生成kube-apiserver凭证
cfssl gencert \
  -ca=${PKI_DIR}/ca.pem \
  -ca-key=${PKI_DIR}/ca-key.pem \
  -config=ca-config.json \
  -hostname=10.96.0.1,${VIP},127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,$(xargs -n1<<<${MasterArray[@]} | sort  | paste -d, -s -) \
  -profile=kubernetes \
  apiserver-csr.json | cfssljson -bare ${PKI_DIR}/apiserver

ls ${PKI_DIR}/apiserver*.pem
#/etc/kubernetes/pki/apiserver-key.pem  /etc/kubernetes/pki/apiserver.pem
#这边-hostname的10.96.0.1是Cluster IP的Kubernetes端点(默认占用第一个ip,用于给集群里的pod要调用Kubernetes的API server);
#kubernetes.default为Kubernets DN。
#如果使用域名可以加上域名
#如果后续master节点扩容此处可以多预留ip到证书里

#Front Proxy Certificate
#此凭证将被用于Authenticating Proxy的功能上,而该功能主要是提供API Aggregation的认证。使用下面命令生成CA:
cfssl gencert \
  -initca front-proxy-ca-csr.json | cfssljson -bare ${PKI_DIR}/front-proxy-ca

ls ${PKI_DIR}/front-proxy-ca*.pem
#/etc/kubernetes/pki/front-proxy-ca-key.pem  /etc/kubernetes/pki/front-proxy-ca.pem

#接着生成front-proxy-client凭证(hosts的warning忽略即可)：
cfssl gencert \
  -ca=${PKI_DIR}/front-proxy-ca.pem \
  -ca-key=${PKI_DIR}/front-proxy-ca-key.pem \
  -config=ca-config.json \
  -profile=kubernetes \
  front-proxy-client-csr.json | cfssljson -bare ${PKI_DIR}/front-proxy-client

ls ${PKI_DIR}/front-proxy-client*.pem
#front-proxy-client-key.pem  front-proxy-client.pem

#Controller Manager Certificate
#凭证会建立system:kube-controller-manager的使用者(凭证 CN),并被绑定在RBAC 
#Cluster Role中的system:kube-controller-manager来让Controller Manager 
#元件能够存取需要的API object。
#这边通过以下命令生成 Controller Manager 凭证(hosts的warning忽略即可)
cfssl gencert \
  -ca=${PKI_DIR}/ca.pem \
  -ca-key=${PKI_DIR}/ca-key.pem \
  -config=ca-config.json \
  -profile=kubernetes \
  manager-csr.json | cfssljson -bare ${PKI_DIR}/controller-manager

ls ${PKI_DIR}/controller-manager*.pem
#controller-manager-key.pem  controller-manager.pem

#接着利用kubectl生成Controller Manager的kubeconfig文件

# controller-manager set cluster

kubectl config set-cluster kubernetes \
    --certificate-authority=${PKI_DIR}/ca.pem \
    --embed-certs=true \
    --server=${KUBE_APISERVER} \
    --kubeconfig=${K8S_DIR}/controller-manager.kubeconfig

# controller-manager set credentials

kubectl config set-credentials system:kube-controller-manager \
    --client-certificate=${PKI_DIR}/controller-manager.pem \
    --client-key=${PKI_DIR}/controller-manager-key.pem \
    --embed-certs=true \
    --kubeconfig=${K8S_DIR}/controller-manager.kubeconfig

# controller-manager set context

kubectl config set-context system:kube-controller-manager@kubernetes \
    --cluster=kubernetes \
    --user=system:kube-controller-manager \
    --kubeconfig=${K8S_DIR}/controller-manager.kubeconfig

# controller-manager set default context

kubectl config use-context system:kube-controller-manager@kubernetes \
    --kubeconfig=${K8S_DIR}/controller-manager.kubeconfig

#Scheduler Certificate
#凭证会建立system:kube-scheduler的使用者(凭证 CN),并被绑定在 RBAC Cluster Role 
#中的system:kube-scheduler来让 Scheduler 元件能够存取需要的 API object。
#这边通过以下命令生成 Scheduler 凭证(hosts的warning忽略即可)：
cfssl gencert \
  -ca=${PKI_DIR}/ca.pem \
  -ca-key=${PKI_DIR}/ca-key.pem \
  -config=ca-config.json \
  -profile=kubernetes \
  scheduler-csr.json | cfssljson -bare ${PKI_DIR}/scheduler

ls ${PKI_DIR}/scheduler*.pem
#/etc/kubernetes/pki/scheduler-key.pem  /etc/kubernetes/pki/scheduler.pem

#接着利用kubectl生成Scheduler的kubeconfig文件
# scheduler set cluster

kubectl config set-cluster kubernetes \
    --certificate-authority=${PKI_DIR}/ca.pem \
    --embed-certs=true \
    --server=${KUBE_APISERVER} \
    --kubeconfig=${K8S_DIR}/scheduler.kubeconfig

# scheduler set credentials

kubectl config set-credentials system:kube-scheduler \
    --client-certificate=${PKI_DIR}/scheduler.pem \
    --client-key=${PKI_DIR}/scheduler-key.pem \
    --embed-certs=true \
    --kubeconfig=${K8S_DIR}/scheduler.kubeconfig

# scheduler set context

kubectl config set-context system:kube-scheduler@kubernetes \
    --cluster=kubernetes \
    --user=system:kube-scheduler \
    --kubeconfig=${K8S_DIR}/scheduler.kubeconfig

# scheduler use default context

kubectl config use-context system:kube-scheduler@kubernetes \
    --kubeconfig=${K8S_DIR}/scheduler.kubeconfig

#Admin Certificate
#Admin 被用来绑定 RBAC Cluster Role 中 cluster-admin,当想要(最常见的就是使用kubectl)操作
#所有 Kubernetes 集群功能时,就必须利用这边生成的 kubeconfig 文件。
cfssl gencert \
  -ca=${PKI_DIR}/ca.pem \
  -ca-key=${PKI_DIR}/ca-key.pem \
  -config=ca-config.json \
  -profile=kubernetes \
  admin-csr.json | cfssljson -bare ${PKI_DIR}/admin

ls ${PKI_DIR}/admin*.pem
#/etc/kubernetes/pki/admin-key.pem  /etc/kubernetes/pki/admin.pem

#kubectl 默认从 ~/.kube/config 文件读取 kube-apiserver 地址、证书、用户名等信息，
#如果没有配置，执行 kubectl 命令时可能会出错(因为默认连接8080匿名端口)
#接着利用kubectl生成 Admin 的kubeconfig文件
# admin set cluster
kubectl config set-cluster kubernetes \
    --certificate-authority=${PKI_DIR}/ca.pem \
    --embed-certs=true \
    --server=${KUBE_APISERVER} \
    --kubeconfig=${K8S_DIR}/admin.kubeconfig

# admin set credentials
kubectl config set-credentials kubernetes-admin \
    --client-certificate=${PKI_DIR}/admin.pem \
    --client-key=${PKI_DIR}/admin-key.pem \
    --embed-certs=true \
    --kubeconfig=${K8S_DIR}/admin.kubeconfig

# admin set context
kubectl config set-context kubernetes-admin@kubernetes \
    --cluster=kubernetes \
    --user=kubernetes-admin \
    --kubeconfig=${K8S_DIR}/admin.kubeconfig

# admin set default context
kubectl config use-context kubernetes-admin@kubernetes \
    --kubeconfig=${K8S_DIR}/admin.kubeconfig


# Master Kubelet Certificate
# 这边使用 Node authorizer 来让节点的 kubelet 能够存取如 services、endpoints 等 API,
# 而使用 Node authorizer 需定义system:nodesCLusterRole(凭证的 Organization),
# 并且包含system:node:<nodeName>的使用者名称(凭证的 Common Name)。
# 首先在k8s-m1节点生成所有 master 节点的 kubelet 凭证,这边通过下面命令來生成：
for NODE in "${!MasterArray[@]}"; do
    echo "--- $NODE ---"
    \cp kubelet-csr.json kubelet-$NODE-csr.json;
    sed -i "s/\$NODE/$NODE/g" kubelet-$NODE-csr.json;
    cfssl gencert \
      -ca=${PKI_DIR}/ca.pem \
      -ca-key=${PKI_DIR}/ca-key.pem \
      -config=ca-config.json \
      -hostname=$NODE \
      -profile=kubernetes \
      kubelet-$NODE-csr.json | cfssljson -bare ${PKI_DIR}/kubelet-$NODE;
    rm -f kubelet-$NODE-csr.json
  done

ls ${PKI_DIR}/kubelet*.pem
#/etc/kubernetes/pki/kubelet-k8s-m1-key.pem  /etc/kubernetes/pki/kubelet-k8s-m2.pem
#/etc/kubernetes/pki/kubelet-k8s-m1.pem      /etc/kubernetes/pki/kubelet-k8s-m3-key.pem
#/etc/kubernetes/pki/kubelet-k8s-m2-key.pem  /etc/kubernetes/pki/kubelet-k8s-m3.pem
#这边需要依据节点修改-hostname与$NODE。

#完成后复制kubelet凭证至所有master节点：
for NODE in "${!MasterArray[@]}"; do
    echo "--- $NODE ${MasterArray[$NODE]} ---"
    ssh ${MasterArray[$NODE]} "mkdir -p ${PKI_DIR}"
    scp ${PKI_DIR}/ca.pem ${MasterArray[$NODE]}:${PKI_DIR}/ca.pem
    scp ${PKI_DIR}/kubelet-$NODE-key.pem ${MasterArray[$NODE]}:${PKI_DIR}/kubelet-key.pem
    scp ${PKI_DIR}/kubelet-$NODE.pem ${MasterArray[$NODE]}:${PKI_DIR}/kubelet.pem
    rm -f ${PKI_DIR}/kubelet-$NODE-key.pem ${PKI_DIR}/kubelet-$NODE.pem
done

#接着在k8s-m1执行以下命令给所有master产生kubelet的kubeconfig文件
for NODE in "${!MasterArray[@]}"; do
    echo "--- $NODE ---"
    ssh ${MasterArray[$NODE]} "cd ${PKI_DIR} && \
      kubectl config set-cluster kubernetes \
        --certificate-authority=${PKI_DIR}/ca.pem \
        --embed-certs=true \
        --server=${KUBE_APISERVER} \
        --kubeconfig=${K8S_DIR}/kubelet.kubeconfig && \
      kubectl config set-credentials system:node:${NODE} \
        --client-certificate=${PKI_DIR}/kubelet.pem \
        --client-key=${PKI_DIR}/kubelet-key.pem \
        --embed-certs=true \
        --kubeconfig=${K8S_DIR}/kubelet.kubeconfig && \
      kubectl config set-context system:node:${NODE}@kubernetes \
        --cluster=kubernetes \
        --user=system:node:${NODE} \
        --kubeconfig=${K8S_DIR}/kubelet.kubeconfig && \
      kubectl config use-context system:node:${NODE}@kubernetes \
        --kubeconfig=${K8S_DIR}/kubelet.kubeconfig"
done


# Service Account Key
# Kubernetes Controller Manager 利用 Key pair 生成与签署 Service Account 的 tokens,
# 而这边不能通过 CA 做认证,而是建立一组公私钥来让 API Server 与 Controller Manager 使用：
# 在k8s-m1执行以下指令
openssl genrsa -out ${PKI_DIR}/sa.key 2048
openssl rsa -in ${PKI_DIR}/sa.key -pubout -out ${PKI_DIR}/sa.pub
ls ${PKI_DIR}/sa.*
#/etc/kubernetes/pki/sa.key  /etc/kubernetes/pki/sa.pub

# 删除不必要文件
# 所有资讯准备完成后,就可以将一些不必要文件删除
rm -f ${PKI_DIR}/*.csr \
    ${PKI_DIR}/scheduler*.pem \
    ${PKI_DIR}/controller-manager*.pem \
    ${PKI_DIR}/admin*.pem \
    ${PKI_DIR}/kubelet*.pem

# 复制文件至其他节点
# 复制凭证文件至其他master节点
for NODE in "${!otherMaster[@]}"; do
    echo "--- $NODE ${otherMaster[$NODE]}---"
    for FILE in $(ls ${PKI_DIR}); do
      scp ${PKI_DIR}/${FILE} ${otherMaster[$NODE]}:${PKI_DIR}/${FILE}
    done
  done

# 复制Kubernetes config文件至其他master节点：
for NODE in "${!otherMaster[@]}"; do
    echo "--- $NODE ${otherMaster[$NODE]}---"
    for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do
      scp ${K8S_DIR}/${FILE} ${otherMaster[$NODE]}:${K8S_DIR}/${FILE}
    done
  done

# Kubernetes Masters

# HA(haproxy+keepalived) 单台master就不要用HA了
for NODE in "${!MasterArray[@]}"; do
    echo "--- $NODE ${MasterArray[$NODE]} ---"
    ssh ${MasterArray[$NODE]} 'yum install haproxy keepalived -y' &
done
wait


# 在k8s-m1节点下把相关配置文件配置后再分发
cd ~/k8s-manual-files/master/etc

# 修改haproxy.cfg配置文件
sed -i '$r '<(paste <( seq -f'  server k8s-api-%g'  ${#MasterArray[@]} ) <( xargs -n1<<<${MasterArray[@]} | sort | sed 's#$#:6443  check#')) haproxy/haproxy.cfg

# 修改keepalived(网卡和VIP写进去,使用下面命令)

sed -ri "s#\{\{ VIP \}\}#${VIP}#" keepalived/*
sed -ri "s#\{\{ interface \}\}#${interface}#" keepalived/keepalived.conf 
sed -i '/unicast_peer/r '<(xargs -n1<<<${MasterArray[@]} | sort | sed 's#^#\t#') keepalived/keepalived.conf

# 分发文件
for NODE in "${!MasterArray[@]}"; do
    echo "--- $NODE ${MasterArray[$NODE]} ---"
    scp -r haproxy/ ${MasterArray[$NODE]}:/etc
    scp -r keepalived/ ${MasterArray[$NODE]}:/etc
    ssh ${MasterArray[$NODE]} 'systemctl enable --now haproxy keepalived'
done


# ping下vip看看能通否,先等待大概四五秒等keepalived和haproxy起来
ping -c1 $VIP

# 如果vip没起来就是keepalived没起来就每个节点上去restart下keepalived或者确认下配置文件
# /etc/keepalived/keepalived.conf里网卡名和ip是否注入成功
for NODE in "${!MasterArray[@]}"; do
    echo "--- $NODE ${MasterArray[$NODE]} ---"
    ssh ${MasterArray[$NODE]}  'systemctl restart haproxy keepalived'
done


# Master组件
# 在k8s-m1节点下把相关配置文件配置后再分发
cd ~/k8s-manual-files/master/
etcd_servers=$( xargs -n1<<<${MasterArray[@]} | sort | sed 's#^#https://#;s#$#:2379#;$s#\n##' | paste -d, -s - )

# 注入VIP和etcd_servers
sed -ri '/--advertise-address/s#=.+#='"$VIP"' \\#' systemd/kube-apiserver.service
sed -ri '/--etcd-servers/s#=.+#='"$etcd_servers"' \\#' systemd/kube-apiserver.service

# 修改encryption.yml
ENCRYPT_SECRET=$( head -c 32 /dev/urandom | base64 )
sed -ri "/secret:/s#(: ).+#\1${ENCRYPT_SECRET}#" encryption/config.yml

# 分发文件(不想master跑pod的话就不复制kubelet的配置文件)
for NODE in "${!MasterArray[@]}"; do
    echo "--- $NODE ${MasterArray[$NODE]} ---"
    ssh ${MasterArray[$NODE]} "mkdir -p $MANIFESTS_DIR /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes"
    scp systemd/kube-*.service ${MasterArray[$NODE]}:/usr/lib/systemd/system/

    scp encryption/config.yml ${MasterArray[$NODE]}:/etc/kubernetes/encryption.yml
    scp audit/policy.yml ${MasterArray[$NODE]}:/etc/kubernetes/audit-policy.yml

    scp systemd/kubelet.service ${MasterArray[$NODE]}:/lib/systemd/system/kubelet.service
    scp systemd/10-kubelet.conf ${MasterArray[$NODE]}:/etc/systemd/system/kubelet.service.d/10-kubelet.conf
    scp etc/kubelet/kubelet-conf.yml ${MasterArray[$NODE]}:/etc/kubernetes/kubelet-conf.yml
done


#在k8s-m1上给所有master机器启动kubelet 服务并设置kubectl补全脚本:
for NODE in "${!MasterArray[@]}"; do
    echo "--- $NODE ${MasterArray[$NODE]} ---"
    ssh ${MasterArray[$NODE]} 'systemctl enable --now kubelet kube-apiserver kube-controller-manager kube-scheduler;
    \cp /etc/kubernetes/admin.kubeconfig ~/.kube/config;
    kubectl completion bash > /etc/bash_completion.d/kubectl'
done


# 建立TLS Bootstrapping RBAC 与Secret
# 后面kubectl命令只需要在任何一台master执行就行了
# 首先在k8s-m1建立一个变数来产生BOOTSTRAP_TOKEN,并建立bootstrap-kubelet.conf的Kubernetes config文件
export TOKEN_ID=$(openssl rand 3 -hex)
export TOKEN_SECRET=$(openssl rand 8 -hex)
export BOOTSTRAP_TOKEN=${TOKEN_ID}.${TOKEN_SECRET}

# bootstrap set cluster
kubectl config set-cluster kubernetes \
    --certificate-authority=${PKI_DIR}/ca.pem \
    --embed-certs=true \
    --server=${KUBE_APISERVER} \
    --kubeconfig=${K8S_DIR}/bootstrap-kubelet.kubeconfig

# bootstrap set credentials
kubectl config set-credentials tls-bootstrap-token-user \
    --token=${BOOTSTRAP_TOKEN} \
    --kubeconfig=${K8S_DIR}/bootstrap-kubelet.kubeconfig

# bootstrap set context
kubectl config set-context tls-bootstrap-token-user@kubernetes \
    --cluster=kubernetes \
    --user=tls-bootstrap-token-user \
    --kubeconfig=${K8S_DIR}/bootstrap-kubelet.kubeconfig

# bootstrap use default context
kubectl config use-context tls-bootstrap-token-user@kubernetes \
    --kubeconfig=${K8S_DIR}/bootstrap-kubelet.kubeconfig

#接着在k8s-m1建立TLS bootstrap secret来提供自动签证使用：
cd ~/k8s-manual-files/master

# 注入变量

sed -ri "s#\{TOKEN_ID\}#${TOKEN_ID}#g" resources/bootstrap-token-Secret.yml
sed -ri "/token-id/s#\S+\$#'&'#" resources/bootstrap-token-Secret.yml
sed -ri "s#\{TOKEN_SECRET\}#${TOKEN_SECRET}#g" resources/bootstrap-token-Secret.yml
kubectl create -f resources/bootstrap-token-Secret.yml
# 下面是输出
#secret "bootstrap-token-65a3a9" created

#在k8s-m1建立 TLS Bootstrap Autoapprove RBAC来自动处理 CSR
kubectl apply -f resources/kubelet-bootstrap-rbac.yml
# 下面是输出
#clusterrolebinding.rbac.authorization.k8s.io "kubelet-bootstrap" created
#clusterrolebinding.rbac.authorization.k8s.io "node-autoapprove-bootstrap" created
#clusterrolebinding.rbac.authorization.k8s.io "node-autoapprove-certificate-rotation" created

#为了方便管理集群,因此需要通过 kubectl logs 来查看,但由于 API 权限,故需要建立一个 RBAC Role 来获取存取权限,这边在k8s-m1节点执行下面命令创建
kubectl apply -f resources/apiserver-to-kubelet-rbac.yml
# 下面是输出
#clusterrole.rbac.authorization.k8s.io "system:kube-apiserver-to-kubelet" configured
#clusterrolebinding.rbac.authorization.k8s.io "system:kube-apiserver" configured

#设定master节点加上污点Taint不让(没有声明容忍该污点的)pod跑在master节点上：
kubectl taint nodes node-role.kubernetes.io/master="":NoSchedule --all
# 下面是输出
# node "k8s-m1" tainted
# node "k8s-m2" tainted
# node "k8s-m3" tainted


# Kubernetes Nodes
# 本部分将说明如何建立与设定Kubernetes Node 角色,Node 是主要执行容器实例(Pod)的工作节点。
# 在开始部署前,先在k8-m1将需要用到的文件复制到所有node节点上
cd ${PKI_DIR}
for NODE in "${!NodeArray[@]}"; do
    echo "--- $NODE ${NodeArray[$NODE]} ---"
    ssh ${NodeArray[$NODE]} "mkdir -p ${PKI_DIR} ${ETCD_SSL}"
    # Etcd
    for FILE in etcd-ca.pem etcd.pem etcd-key.pem; do
      scp ${ETCD_SSL}/${FILE} ${NodeArray[$NODE]}:${ETCD_SSL}/${FILE}
    done
    # Kubernetes
    for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig ; do
      scp ${K8S_DIR}/${FILE} ${NodeArray[$NODE]}:${K8S_DIR}/${FILE}
    done
done

# 部署与设定
# 在k8s-m1节点分发kubelet.service相关文件到每台node上去管理kubelet：
cd ~/k8s-manual-files/
for NODE in "${!NodeArray[@]}"; do
    echo "--- $NODE ${NodeArray[$NODE]} ---"
    ssh ${NodeArray[$NODE]} "mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d $MANIFESTS_DIR"
    scp node/systemd/kubelet.service ${NodeArray[$NODE]}:/lib/systemd/system/kubelet.service
    scp node/systemd/10-kubelet.conf ${NodeArray[$NODE]}:/etc/systemd/system/kubelet.service.d/10-kubelet.conf
    scp node/etc/kubelet/kubelet-conf.yml ${NodeArray[$NODE]}:/etc/kubernetes/kubelet-conf.yml
done

# 最后在k8s-m1上去启动每个node节点的kubelet 服务:
for NODE in "${!NodeArray[@]}"; do
    echo "--- $NODE ${NodeArray[$NODE]} ---"
    ssh ${NodeArray[$NODE]} 'systemctl enable --now kubelet.service'
done

# Kubernetes Core Addons部署
# daemonSet方式部署
cd ~/k8s-manual-files
# 注入变量
sed -ri "/server:/s#(: ).+#\1${KUBE_APISERVER}#" addons/kube-proxy/kube-proxy.yml
sed -ri "/image:.+kube-proxy/s#:[^:]+\$#:$KUBE_VERSION#" addons/kube-proxy/kube-proxy.yml
kubectl apply -f addons/kube-proxy/kube-proxy.yml
# 下面是输出
# serviceaccount "kube-proxy" created
# clusterrolebinding.rbac.authorization.k8s.io "system:kube-proxy" created
# configmap "kube-proxy" created
# daemonset.apps "kube-proxy" created

# Calico
# 拉取镜像
curl -s https://zhangguanzhang.github.io/bash/pull.sh | bash -s -- quay.io/calico/node:v3.1.3
curl -s https://zhangguanzhang.github.io/bash/pull.sh | bash -s -- quay.io/calico/cni:v3.1.3

sed -ri "s#\{\{ interface \}\}#${interface}#" addons/calico/v3.1/calico.yml
kubectl apply -f addons/calico/v3.1
kubectl -n kube-system get pod --all-namespaces

# CoreDNS
# 这里节点使用的是hostname,所以建议把hosts关系写到Coredns的解析里
sed  -i '57r '<(echo '        hosts {';for NODE in "${!MasterArray[@]}";do  echo "          ${MasterArray[$NODE]} $NODE"; done;for NODE in "${!NodeArray[@]}";do echo "          ${NodeArray[$NODE]} $NODE";done;echo '        }';) addons/coredns/coredns.yml

# 如果后期增加类似解析记录的话可以改cm后(注意cm是yaml格式写的,所以不要使用tab必须用空格)用kill信号让coredns去reload,
# 因为主进程是前台也就是PID为1,找到对应的pod执行即可,也可以利用deploy的更新机制去伪更新实现重启
# kubectl exec coredns-xxxxxx -- kill -SIGUSR1 1

# 在k8s-m1通过 kubeclt 执行下面命令來创建,并检查是否部署成功:
# 注: 目前coredns官方有bug, 在此不使用
# kubectl apply -f addons/coredns/coredns.yml
# kubectl -n kube-system get po -l k8s-app=kube-dns

# 测试coredns正常否看脸,可以下面创建pod来测试
# 先创建一个dnstool的pod
cat<<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: busybox
  namespace: default
spec:
  containers:
  - name: busybox
    image: busybox:1.28
    command:
      - sleep
      - "3600"
    imagePullPolicy: IfNotPresent
  restartPolicy: Always
EOF
# nslookup下看看能返回地址不
kubectl exec -ti busybox -- nslookup kubernetes

# 如果已安装的话, 如果CoreDNS工作不正常,先删掉它,删掉后确保coredns的pod和svc不存在
# kubectl delete -f addons/coredns/coredns.yml
# kubectl -n kube-system get pod,svc -l k8s-app=kube-dns

# KubeDNS(如果遇到上面的CoreDNS的bug的话使用它)
kubectl apply -f addons/Kubedns/kubedns.yml
#查看pod状态
kubectl -n kube-system get pod,svc -l k8s-app=kube-dns
#检查集群dns正常否
kubectl exec -ti busybox -- nslookup kubernetes
# 等待官方修复的话可以后期先创建出coredns的deploy,svc会负载到coredns之后再删掉kubedns的副本控制器和pod

# Metrics Server(1.8+的k8s)
kubectl create -f addons/metric-server/metrics-server-1.12+.yml

# Kubernets Extra Addons部署
cd ~/k8s-manual-files

# Dashboard
# 在k8s-m1通过kubectl来建立kubernetes dashboard即可：
kubectl apply -f ExtraAddons/dashboard
kubectl -n kube-system get po,svc -l k8s-app=kubernetes-dashboard
# 完成后,就可以通过浏览器存取Dashboard https://{YOUR_VIP}:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/
# 用如下命令得到token, 复制token,然后贴到Kubernetes dashboard。注意这边一般来说要针对不同User开启特定存取权限。
kubectl -n kube-system describe secrets | sed -rn '/\sdashboard-token-/,/^token/{/^token/s#\S+\s+##p}'


# 这边会额外建立一个名称为anonymous-dashboard-proxy的 Cluster Role(Binding) 
# 来让system:anonymous这个匿名使用者能够通过 API Server 来 proxy 到 Kubernetes Dashboard,
# 而这个 RBAC 规则仅能够存取services/proxy资源,以及https:kubernetes-dashboard:资源名称同时
# 在 1.7 版本以后的 Dashboard 将不再提供所有权限,因此需要建立一个 service account 来绑定 
# cluster-admin role(这系列已经写在dashboard/anonymous-proxy-rbac.yml里)
# 完成后,就可以通过浏览器存取Dashboard https://{YOUR_VIP}:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/。
kubectl -n kube-system describe secrets | sed -rn '/\sdashboard-token-/,/^token/{/^token/s#\S+\s+##p}'
# 复制token,然后贴到Kubernetes dashboard。注意这边一般来说要针对不同User开启特定存取权限。

# Ingress Controller
# 首先在k8s-m1执行下列命令来建立 Ingress Controller,并检查是否部署正常：
sed -ri 's#\{\{ INGRESS_VIP \}\}#'"${INGRESS_VIP}"'#' ExtraAddons/ingress-controller/ingress-controller-svc.yml
kubectl create ns ingress-nginx
kubectl apply -f ExtraAddons/ingress-controller/
kubectl -n ingress-nginx get po,svc

# External DNS(非公有云下且内网没DNS下很实用)
# 首先在k8s-m1执行下面命令来建立 CoreDNS Server,并检查是否部署正常
sed -ri 's#\{\{ INGRESS_VIP \}\}#'"${INGRESS_VIP}"'#' ExtraAddons/external-dns/coredns/coredns-svc-tcp.yml
sed -ri 's#\{\{ INGRESS_VIP \}\}#'"${INGRESS_VIP}"'#' ExtraAddons/external-dns/coredns/coredns-svc-udp.yml
kubectl create ns external-dns
kubectl create -f ExtraAddons/external-dns/coredns/
kubectl -n external-dns get po,svc

# 接着部署 ExternalDNS 来与 CoreDNS 同步资源记录：
kubectl apply -f ExtraAddons/external-dns/external-dns/
kubectl -n external-dns get po -l k8s-app=external-dns

# Prometheus Operator
# 在k8s-m1通过kubectl来建立Prometheus 需要的元件
kubectl apply -f ExtraAddons/prometheus/
kubectl apply -f ExtraAddons/prometheus/operator/

# 这边要等 operator 起來并建立好 CRDs 才能进行
kubectl apply -f ExtraAddons/prometheus/alertmanater/
kubectl apply -f ExtraAddons/prometheus/node-exporter/
kubectl apply -f ExtraAddons/prometheus/kube-state-metrics/
kubectl apply -f ExtraAddons/prometheus/grafana/
kubectl apply -f ExtraAddons/prometheus/kube-service-discovery/

# 这里建议先执行后面的补全ep信息部分的操作后再回来
kubectl apply -f ExtraAddons/prometheus/prometheus/
kubectl apply -f ExtraAddons/prometheus/servicemonitor/

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#!/usr/bin/env bash

set -e

# 声明集群成员信息

declare -A MasterArray otherMaster NodeArray

MasterArray=(['k8s-m1']=172.20.23.167 ['k8s-m2']=172.20.23.168 ['k8s-m3']=172.20.23.169)

otherMaster=(['k8s-m2']=172.20.23.168 ['k8s-m3']=172.20.23.169)

NodeArray=(['k8s-n1']=172.20.23.173)

export VIP=172.20.23.4

export INGRESS_VIP=172.20.23.11

[ "${#MasterArray[@]}" -eq 1 ] && export VIP=${MasterArray[@]} || export API_PORT=8443

export KUBE_APISERVER=https://${VIP}:${API_PORT:-6443}

#声明需要安装的的k8s版本

export KUBE_VERSION=v1.12.3

# 网卡名

export interface=ens160

export K8S_DIR=/etc/kubernetes

export PKI_DIR=${K8S_DIR}/pki

export ETCD_SSL=/etc/etcd/ssl

export MANIFESTS_DIR=/etc/kubernetes/manifests/

# cni

export CNI_URL="https://github.com/containernetworking/plugins/releases/download"

export CNI_VERSION=v0.7.4

# cfssl

export CFSSL_URL="https://pkg.cfssl.org/R1.2"

# etcd

export ETCD_version=v3.3.10

#首先在k8s-m1通过git获取部署要用到的二进制配置文件和yml

# curl https://storage.googleapis.com/kubernetes-release/release/${KUBE_VERSION}/kubernetes-server-linux-amd64.tar.gz > kubernetes-server-linux-amd64.tar.gz

# tar -zxvf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}

#分发master相关组件到其他master上

#(这边不想master跑pod的话就不复制kubelet和kube-proxy过去,以及后面master节点上的kubelet的相关操作)

# for NODE in "${!otherMaster[@]}"; do

# echo "--- $NODE ${otherMaster[$NODE]} ---"

# scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} ${otherMaster[$NODE]}:/usr/local/bin/

# done

#分发node的kubernetes二进制文件

# for NODE in "${!NodeArray[@]}"; do

# echo "--- $NODE ${NodeArray[$NODE]} ---"

# scp /usr/local/bin/kube{let,-proxy} ${NodeArray[$NODE]}:/usr/local/bin/

# done

#在k81-m1下载Kubernetes CNI 二进制文件并分发

#分发cni文件到otherMaster

# mkdir -p /opt/cni/bin

# wget "${CNI_URL}/${CNI_VERSION}/cni-plugins-amd64-${CNI_VERSION}.tgz"

# tar -zxf cni-plugins-amd64-${CNI_VERSION}.tgz -C /opt/cni/bin

# 分发cni文件

# for NODE in "${!otherMaster[@]}"; do

# echo "--- $NODE ${otherMaster[$NODE]} ---"

# ssh ${otherMaster[$NODE]} 'mkdir -p /opt/cni/bin'

# scp /opt/cni/bin/* ${otherMaster[$NODE]}:/opt/cni/bin/

# done

# #分发cni文件到node

# for NODE in "${!NodeArray[@]}"; do

# echo "--- $NODE ${NodeArray[$NODE]} ---"

# ssh ${NodeArray[$NODE]} 'mkdir -p /opt/cni/bin'

# scp /opt/cni/bin/* ${NodeArray[$NODE]}:/opt/cni/bin/

# done

#在k8s-m1需要安裝CFSSL工具,这将会用來建立 TLS Certificates。

# wget "${CFSSL_URL}/cfssl_linux-amd64" -O /usr/local/bin/cfssl

# wget "${CFSSL_URL}/cfssljson_linux-amd64" -O /usr/local/bin/cfssljson

# chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson

#建立集群CA keys 与Certificates

#Etcd CA

#首先在k8s-m1建立/etc/etcd/ssl文件夹

cd ~/k8s-manual-files/pki

mkdir -p ${ETCD_SSL}

#从CSR json文件ca-config.json与etcd-ca-csr.json生成etcd的CA keys与Certificate：

cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare ${ETCD_SSL}/etcd-ca

#生成Etcd证书

cfssl gencert \

-ca=${ETCD_SSL}/etcd-ca.pem \

-ca-key=${ETCD_SSL}/etcd-ca-key.pem \

-config=ca-config.json \

-hostname=127.0.0.1,$(xargs -n1<<<${MasterArray[@]} | sort | paste -d, -s -) \

-profile=kubernetes \

etcd-csr.json | cfssljson -bare ${ETCD_SSL}/etcd

#-hostname值为所有masters节点的IP,如果后续master节点扩容此处可以多预留ip到证书里

#完成后删除不必要文件,确认/etc/etcd/ssl有以下文件

rm -rf ${ETCD_SSL}/*.csr

ls $ETCD_SSL

#etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem

#在k8s-m1上复制相关文件至其他Etcd节点,这边etcd跑在所有master节点上,所以etcd的证书复制到其他mster节点：

for NODE in "${!otherMaster[@]}"; do

echo "--- $NODE ${otherMaster[$NODE]} ---"

ssh ${otherMaster[$NODE]} "mkdir -p ${ETCD_SSL}"

for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do

scp ${ETCD_SSL}/${FILE} ${otherMaster[$NODE]}:${ETCD_SSL}/${FILE}

done

#ETCD二进制文件

#etcd所有标准版本可以在下面url查看

#https://github.com/etcd-io/etcd/releases

#在k8s-m1上下载etcd的二进制文件,单台的话建议使用v3.1.9因为有bug

#[ "${#MasterArray[@]}" -eq 1 ] && ETCD_version=v3.3.10 || :

cd ~/k8s-manual-files

#在k8s-m1上分发etcd的二进制文件到其他master上

for NODE in "${!otherMaster[@]}"; do

echo "--- $NODE ${otherMaster[$NODE]} ---"

scp /usr/local/bin/etcd* ${otherMaster[$NODE]}:/usr/local/bin/

done

#在k8s-m1上配置etcd配置文件并分发相关文件

#配置文件存放在/etc/etcd/etcd.config.yml里

#注入基础变量

cd ~/k8s-manual-files/master/

etcd_servers=$( xargs -n1<<<${MasterArray[@]} | sort | sed 's#^#https://#;s#$#:2379#;$s#\n##' | paste -d, -s - )

etcd_initial_cluster=$( for i in ${!MasterArray[@]};do echo $i=https://${MasterArray[$i]}:2380; done | sort | paste -d, -s - )

sed -ri "/initial-cluster:/s#'.+'#'${etcd_initial_cluster}'#" etc/etcd/config.yml

#分发systemd和配置文件

for NODE in "${!MasterArray[@]}"; do

echo "--- $NODE ${MasterArray[$NODE]} ---"

ssh ${MasterArray[$NODE]} "mkdir -p $MANIFESTS_DIR /etc/etcd /var/lib/etcd"

scp systemd/etcd.service ${MasterArray[$NODE]}:/usr/lib/systemd/system/etcd.service

scp etc/etcd/config.yml ${MasterArray[$NODE]}:/etc/etcd/etcd.config.yml

ssh ${MasterArray[$NODE]} "sed -i "s/{HOSTNAME}/$NODE/g" /etc/etcd/etcd.config.yml"

ssh ${MasterArray[$NODE]} "sed -i "s/{PUBLIC_IP}/${MasterArray[$NODE]}/g" /etc/etcd/etcd.config.yml"

ssh ${MasterArray[$NODE]} 'systemctl daemon-reload'

done

#在k8s-m1上启动所有etcd

#etcd 进程首次启动时会等待其它节点的 etcd 加入集群，命令 systemctl start etcd 会卡住一段时间，为正常现象

#可以全部启动后后面的etcdctl命令查看状态确认正常否

for NODE in "${!MasterArray[@]}"; do

echo "--- $NODE ${MasterArray[$NODE]} ---"

ssh ${MasterArray[$NODE]} 'systemctl enable --now etcd' &

done

wait

#然后输出到终端了的时候多按几下回车直到等光标回到终端状态

#k8s-m1上执行下面命令验证 ETCD 集群状态,下面第二个是使用3的api去查询集群的键值

etcdctl \

--cert-file /etc/etcd/ssl/etcd.pem \

--key-file /etc/etcd/ssl/etcd-key.pem \

--ca-file /etc/etcd/ssl/etcd-ca.pem \

--endpoints $etcd_servers cluster-health

#使用3的api去查询集群的键值

ETCDCTL_API=3 \

etcdctl \

--cert=/etc/etcd/ssl/etcd.pem \

--key=/etc/etcd/ssl/etcd-key.pem \

--cacert /etc/etcd/ssl/etcd-ca.pem \

--endpoints $etcd_servers get / --prefix --keys-only

#Kubernetes CA

#为确保安全，kubernetes 系统各组件需要使用 x509 证书对通信进行加密和认证。

#在k8s-m1建立pki文件夹,并生成根CA凭证用于签署其它的k8s证书

mkdir -p ${PKI_DIR}

cd ~/k8s-manual-files/pki

cfssl gencert -initca ca-csr.json | cfssljson -bare ${PKI_DIR}/ca

ls ${PKI_DIR}/ca*.pem

#/etc/kubernetes/pki/ca-key.pem /etc/kubernetes/pki/ca.pem

#API Server Certificate

#此凭证将被用于API Server和Kubelet Client通信使用,使用下面命令生成kube-apiserver凭证

cfssl gencert \

-ca=${PKI_DIR}/ca.pem \

-ca-key=${PKI_DIR}/ca-key.pem \

-config=ca-config.json \

-hostname=10.96.0.1,${VIP},127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,$(xargs -n1<<<${MasterArray[@]} | sort | paste -d, -s -) \

-profile=kubernetes \

apiserver-csr.json | cfssljson -bare ${PKI_DIR}/apiserver

ls ${PKI_DIR}/apiserver*.pem

#/etc/kubernetes/pki/apiserver-key.pem /etc/kubernetes/pki/apiserver.pem

#这边-hostname的10.96.0.1是Cluster IP的Kubernetes端点(默认占用第一个ip,用于给集群里的pod要调用Kubernetes的API server);

#kubernetes.default为Kubernets DN。

#如果使用域名可以加上域名

#如果后续master节点扩容此处可以多预留ip到证书里

#Front Proxy Certificate

#此凭证将被用于Authenticating Proxy的功能上,而该功能主要是提供API Aggregation的认证。使用下面命令生成CA:

cfssl gencert \

-initca front-proxy-ca-csr.json | cfssljson -bare ${PKI_DIR}/front-proxy-ca

ls ${PKI_DIR}/front-proxy-ca*.pem

#/etc/kubernetes/pki/front-proxy-ca-key.pem /etc/kubernetes/pki/front-proxy-ca.pem

#接着生成front-proxy-client凭证(hosts的warning忽略即可)：

cfssl gencert \

-ca=${PKI_DIR}/front-proxy-ca.pem \

-ca-key=${PKI_DIR}/front-proxy-ca-key.pem \

-config=ca-config.json \

-profile=kubernetes \

front-proxy-client-csr.json | cfssljson -bare ${PKI_DIR}/front-proxy-client

ls ${PKI_DIR}/front-proxy-client*.pem

#front-proxy-client-key.pem front-proxy-client.pem

#Controller Manager Certificate

#凭证会建立system:kube-controller-manager的使用者(凭证 CN),并被绑定在RBAC

#Cluster Role中的system:kube-controller-manager来让Controller Manager

#元件能够存取需要的API object。

#这边通过以下命令生成 Controller Manager 凭证(hosts的warning忽略即可)

cfssl gencert \

-ca=${PKI_DIR}/ca.pem \

-ca-key=${PKI_DIR}/ca-key.pem \

-config=ca-config.json \

-profile=kubernetes \

manager-csr.json | cfssljson -bare ${PKI_DIR}/controller-manager

ls ${PKI_DIR}/controller-manager*.pem

#controller-manager-key.pem controller-manager.pem

#接着利用kubectl生成Controller Manager的kubeconfig文件

# controller-manager set cluster

kubectl config set-cluster kubernetes \

--certificate-authority=${PKI_DIR}/ca.pem \

--embed-certs=true \

--server=${KUBE_APISERVER} \

--kubeconfig=${K8S_DIR}/controller-manager.kubeconfig

# controller-manager set credentials

kubectl config set-credentials system:kube-controller-manager \

--client-certificate=${PKI_DIR}/controller-manager.pem \

--client-key=${PKI_DIR}/controller-manager-key.pem \

--embed-certs=true \

--kubeconfig=${K8S_DIR}/controller-manager.kubeconfig

# controller-manager set context

kubectl config set-context system:kube-controller-manager@kubernetes \

--cluster=kubernetes \

--user=system:kube-controller-manager \

--kubeconfig=${K8S_DIR}/controller-manager.kubeconfig

# controller-manager set default context

kubectl config use-context system:kube-controller-manager@kubernetes \

--kubeconfig=${K8S_DIR}/controller-manager.kubeconfig

#Scheduler Certificate

#凭证会建立system:kube-scheduler的使用者(凭证 CN),并被绑定在 RBAC Cluster Role

#中的system:kube-scheduler来让 Scheduler 元件能够存取需要的 API object。

#这边通过以下命令生成 Scheduler 凭证(hosts的warning忽略即可)：

cfssl gencert \

-ca=${PKI_DIR}/ca.pem \

-ca-key=${PKI_DIR}/ca-key.pem \

-config=ca-config.json \

-profile=kubernetes \

scheduler-csr.json | cfssljson -bare ${PKI_DIR}/scheduler

ls ${PKI_DIR}/scheduler*.pem

#/etc/kubernetes/pki/scheduler-key.pem /etc/kubernetes/pki/scheduler.pem

#接着利用kubectl生成Scheduler的kubeconfig文件

# scheduler set cluster

kubectl config set-cluster kubernetes \

--certificate-authority=${PKI_DIR}/ca.pem \

--embed-certs=true \

--server=${KUBE_APISERVER} \

--kubeconfig=${K8S_DIR}/scheduler.kubeconfig

# scheduler set credentials

kubectl config set-credentials system:kube-scheduler \

--client-certificate=${PKI_DIR}/scheduler.pem \

--client-key=${PKI_DIR}/scheduler-key.pem \

--embed-certs=true \

--kubeconfig=${K8S_DIR}/scheduler.kubeconfig

# scheduler set context

kubectl config set-context system:kube-scheduler@kubernetes \

--cluster=kubernetes \

--user=system:kube-scheduler \

--kubeconfig=${K8S_DIR}/scheduler.kubeconfig

# scheduler use default context

kubectl config use-context system:kube-scheduler@kubernetes \

--kubeconfig=${K8S_DIR}/scheduler.kubeconfig

#Admin Certificate

#Admin 被用来绑定 RBAC Cluster Role 中 cluster-admin,当想要(最常见的就是使用kubectl)操作

#所有 Kubernetes 集群功能时,就必须利用这边生成的 kubeconfig 文件。

cfssl gencert \

-ca=${PKI_DIR}/ca.pem \

-ca-key=${PKI_DIR}/ca-key.pem \

-config=ca-config.json \

-profile=kubernetes \

admin-csr.json | cfssljson -bare ${PKI_DIR}/admin

ls ${PKI_DIR}/admin*.pem

#/etc/kubernetes/pki/admin-key.pem /etc/kubernetes/pki/admin.pem

#kubectl 默认从 ~/.kube/config 文件读取 kube-apiserver 地址、证书、用户名等信息，

#如果没有配置，执行 kubectl 命令时可能会出错(因为默认连接8080匿名端口)

#接着利用kubectl生成 Admin 的kubeconfig文件

# admin set cluster

kubectl config set-cluster kubernetes \

--certificate-authority=${PKI_DIR}/ca.pem \

--embed-certs=true \

--server=${KUBE_APISERVER} \

--kubeconfig=${K8S_DIR}/admin.kubeconfig

# admin set credentials

kubectl config set-credentials kubernetes-admin \

--client-certificate=${PKI_DIR}/admin.pem \

--client-key=${PKI_DIR}/admin-key.pem \

--embed-certs=true \

--kubeconfig=${K8S_DIR}/admin.kubeconfig

# admin set context

kubectl config set-context kubernetes-admin@kubernetes \

--cluster=kubernetes \

--user=kubernetes-admin \

--kubeconfig=${K8S_DIR}/admin.kubeconfig

# admin set default context

kubectl config use-context kubernetes-admin@kubernetes \

--kubeconfig=${K8S_DIR}/admin.kubeconfig

# Master Kubelet Certificate

# 这边使用 Node authorizer 来让节点的 kubelet 能够存取如 services、endpoints 等 API,

# 而使用 Node authorizer 需定义system:nodesCLusterRole(凭证的 Organization),

# 并且包含system:node:<nodeName>的使用者名称(凭证的 Common Name)。

# 首先在k8s-m1节点生成所有 master 节点的 kubelet 凭证,这边通过下面命令來生成：

for NODE in "${!MasterArray[@]}"; do

echo "--- $NODE ---"

\cp kubelet-csr.json kubelet-$NODE-csr.json;

sed -i "s/\$NODE/$NODE/g" kubelet-$NODE-csr.json;

cfssl gencert \

-ca=${PKI_DIR}/ca.pem \

-ca-key=${PKI_DIR}/ca-key.pem \

-config=ca-config.json \

-hostname=$NODE \

-profile=kubernetes \

kubelet-$NODE-csr.json | cfssljson -bare ${PKI_DIR}/kubelet-$NODE;

rm -f kubelet-$NODE-csr.json

done

ls ${PKI_DIR}/kubelet*.pem

#/etc/kubernetes/pki/kubelet-k8s-m1-key.pem /etc/kubernetes/pki/kubelet-k8s-m2.pem

#/etc/kubernetes/pki/kubelet-k8s-m1.pem /etc/kubernetes/pki/kubelet-k8s-m3-key.pem

#/etc/kubernetes/pki/kubelet-k8s-m2-key.pem /etc/kubernetes/pki/kubelet-k8s-m3.pem

#这边需要依据节点修改-hostname与$NODE。

#完成后复制kubelet凭证至所有master节点：

for NODE in "${!MasterArray[@]}"; do

echo "--- $NODE ${MasterArray[$NODE]} ---"

ssh ${MasterArray[$NODE]} "mkdir -p ${PKI_DIR}"

scp ${PKI_DIR}/ca.pem ${MasterArray[$NODE]}:${PKI_DIR}/ca.pem

scp ${PKI_DIR}/kubelet-$NODE-key.pem ${MasterArray[$NODE]}:${PKI_DIR}/kubelet-key.pem

scp ${PKI_DIR}/kubelet-$NODE.pem ${MasterArray[$NODE]}:${PKI_DIR}/kubelet.pem

rm -f ${PKI_DIR}/kubelet-$NODE-key.pem ${PKI_DIR}/kubelet-$NODE.pem

done

#接着在k8s-m1执行以下命令给所有master产生kubelet的kubeconfig文件

for NODE in "${!MasterArray[@]}"; do

echo "--- $NODE ---"

ssh ${MasterArray[$NODE]} "cd ${PKI_DIR} && \

kubectl config set-cluster kubernetes \

--certificate-authority=${PKI_DIR}/ca.pem \

--embed-certs=true \

--server=${KUBE_APISERVER} \

--kubeconfig=${K8S_DIR}/kubelet.kubeconfig && \

kubectl config set-credentials system:node:${NODE} \

--client-certificate=${PKI_DIR}/kubelet.pem \

--client-key=${PKI_DIR}/kubelet-key.pem \

--embed-certs=true \

--kubeconfig=${K8S_DIR}/kubelet.kubeconfig && \

kubectl config set-context system:node:${NODE}@kubernetes \

--cluster=kubernetes \

--user=system:node:${NODE} \

--kubeconfig=${K8S_DIR}/kubelet.kubeconfig && \

kubectl config use-context system:node:${NODE}@kubernetes \

--kubeconfig=${K8S_DIR}/kubelet.kubeconfig"

done

# Service Account Key

# Kubernetes Controller Manager 利用 Key pair 生成与签署 Service Account 的 tokens,

# 而这边不能通过 CA 做认证,而是建立一组公私钥来让 API Server 与 Controller Manager 使用：

# 在k8s-m1执行以下指令

openssl genrsa -out ${PKI_DIR}/sa.key 2048

openssl rsa -in ${PKI_DIR}/sa.key -pubout -out ${PKI_DIR}/sa.pub

ls ${PKI_DIR}/sa.*

#/etc/kubernetes/pki/sa.key /etc/kubernetes/pki/sa.pub

# 删除不必要文件

# 所有资讯准备完成后,就可以将一些不必要文件删除

rm -f ${PKI_DIR}/*.csr \

${PKI_DIR}/scheduler*.pem \

${PKI_DIR}/controller-manager*.pem \

${PKI_DIR}/admin*.pem \

${PKI_DIR}/kubelet*.pem

# 复制文件至其他节点

# 复制凭证文件至其他master节点

for NODE in "${!otherMaster[@]}"; do

echo "--- $NODE ${otherMaster[$NODE]}---"

for FILE in $(ls ${PKI_DIR}); do

scp ${PKI_DIR}/${FILE} ${otherMaster[$NODE]}:${PKI_DIR}/${FILE}

done

# 复制Kubernetes config文件至其他master节点：

for NODE in "${!otherMaster[@]}"; do

echo "--- $NODE ${otherMaster[$NODE]}---"

for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do

scp ${K8S_DIR}/${FILE} ${otherMaster[$NODE]}:${K8S_DIR}/${FILE}

done

# Kubernetes Masters

# HA(haproxy+keepalived) 单台master就不要用HA了

for NODE in "${!MasterArray[@]}"; do

echo "--- $NODE ${MasterArray[$NODE]} ---"

ssh ${MasterArray[$NODE]} 'yum install haproxy keepalived -y' &

done

wait

# 在k8s-m1节点下把相关配置文件配置后再分发

cd ~/k8s-manual-files/master/etc

# 修改haproxy.cfg配置文件

sed -i '$r '<(paste <( seq -f' server k8s-api-%g' ${#MasterArray[@]} ) <( xargs -n1<<<${MasterArray[@]} | sort | sed 's#$#:6443 check#')) haproxy/haproxy.cfg

# 修改keepalived(网卡和VIP写进去,使用下面命令)

sed -ri "s#\{\{ VIP \}\}#${VIP}#" keepalived/*

sed -ri "s#\{\{ interface \}\}#${interface}#" keepalived/keepalived.conf

sed -i '/unicast_peer/r '<(xargs -n1<<<${MasterArray[@]} | sort | sed 's#^#\t#') keepalived/keepalived.conf

# 分发文件

for NODE in "${!MasterArray[@]}"; do

echo "--- $NODE ${MasterArray[$NODE]} ---"

scp -r haproxy/ ${MasterArray[$NODE]}:/etc

scp -r keepalived/ ${MasterArray[$NODE]}:/etc

ssh ${MasterArray[$NODE]} 'systemctl enable --now haproxy keepalived'

done

# ping下vip看看能通否,先等待大概四五秒等keepalived和haproxy起来

ping -c1 $VIP

# 如果vip没起来就是keepalived没起来就每个节点上去restart下keepalived或者确认下配置文件

# /etc/keepalived/keepalived.conf里网卡名和ip是否注入成功

for NODE in "${!MasterArray[@]}"; do

echo "--- $NODE ${MasterArray[$NODE]} ---"

ssh ${MasterArray[$NODE]} 'systemctl restart haproxy keepalived'

done

# Master组件

# 在k8s-m1节点下把相关配置文件配置后再分发

cd ~/k8s-manual-files/master/

etcd_servers=$( xargs -n1<<<${MasterArray[@]} | sort | sed 's#^#https://#;s#$#:2379#;$s#\n##' | paste -d, -s - )

# 注入VIP和etcd_servers

sed -ri '/--advertise-address/s#=.+#='"$VIP"' \\#' systemd/kube-apiserver.service

sed -ri '/--etcd-servers/s#=.+#='"$etcd_servers"' \\#' systemd/kube-apiserver.service

# 修改encryption.yml

ENCRYPT_SECRET=$( head -c 32 /dev/urandom | base64 )

sed -ri "/secret:/s#(: ).+#\1${ENCRYPT_SECRET}#" encryption/config.yml

# 分发文件(不想master跑pod的话就不复制kubelet的配置文件)

for NODE in "${!MasterArray[@]}"; do

echo "--- $NODE ${MasterArray[$NODE]} ---"

ssh ${MasterArray[$NODE]} "mkdir -p $MANIFESTS_DIR /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes"

scp systemd/kube-*.service ${MasterArray[$NODE]}:/usr/lib/systemd/system/

scp encryption/config.yml ${MasterArray[$NODE]}:/etc/kubernetes/encryption.yml

scp audit/policy.yml ${MasterArray[$NODE]}:/etc/kubernetes/audit-policy.yml

scp systemd/kubelet.service ${MasterArray[$NODE]}:/lib/systemd/system/kubelet.service

scp systemd/10-kubelet.conf ${MasterArray[$NODE]}:/etc/systemd/system/kubelet.service.d/10-kubelet.conf

scp etc/kubelet/kubelet-conf.yml ${MasterArray[$NODE]}:/etc/kubernetes/kubelet-conf.yml

done

#在k8s-m1上给所有master机器启动kubelet 服务并设置kubectl补全脚本:

for NODE in "${!MasterArray[@]}"; do

echo "--- $NODE ${MasterArray[$NODE]} ---"

ssh ${MasterArray[$NODE]} 'systemctl enable --now kubelet kube-apiserver kube-controller-manager kube-scheduler;

\cp /etc/kubernetes/admin.kubeconfig ~/.kube/config;

kubectl completion bash > /etc/bash_completion.d/kubectl'

done

# 建立TLS Bootstrapping RBAC 与Secret

# 后面kubectl命令只需要在任何一台master执行就行了

# 首先在k8s-m1建立一个变数来产生BOOTSTRAP_TOKEN,并建立bootstrap-kubelet.conf的Kubernetes config文件

export TOKEN_ID=$(openssl rand 3 -hex)

export TOKEN_SECRET=$(openssl rand 8 -hex)

export BOOTSTRAP_TOKEN=${TOKEN_ID}.${TOKEN_SECRET}

# bootstrap set cluster

kubectl config set-cluster kubernetes \

--certificate-authority=${PKI_DIR}/ca.pem \

--embed-certs=true \

--server=${KUBE_APISERVER} \

--kubeconfig=${K8S_DIR}/bootstrap-kubelet.kubeconfig

# bootstrap set credentials

kubectl config set-credentials tls-bootstrap-token-user \

--token=${BOOTSTRAP_TOKEN} \

--kubeconfig=${K8S_DIR}/bootstrap-kubelet.kubeconfig

# bootstrap set context

kubectl config set-context tls-bootstrap-token-user@kubernetes \

--cluster=kubernetes \

--user=tls-bootstrap-token-user \

--kubeconfig=${K8S_DIR}/bootstrap-kubelet.kubeconfig

# bootstrap use default context

kubectl config use-context tls-bootstrap-token-user@kubernetes \

--kubeconfig=${K8S_DIR}/bootstrap-kubelet.kubeconfig

#接着在k8s-m1建立TLS bootstrap secret来提供自动签证使用：

cd ~/k8s-manual-files/master

# 注入变量

sed -ri "s#\{TOKEN_ID\}#${TOKEN_ID}#g" resources/bootstrap-token-Secret.yml

sed -ri "/token-id/s#\S+\$#'&'#" resources/bootstrap-token-Secret.yml

sed -ri "s#\{TOKEN_SECRET\}#${TOKEN_SECRET}#g" resources/bootstrap-token-Secret.yml

kubectl create -f resources/bootstrap-token-Secret.yml

# 下面是输出

#secret "bootstrap-token-65a3a9" created

#在k8s-m1建立 TLS Bootstrap Autoapprove RBAC来自动处理 CSR

kubectl apply -f resources/kubelet-bootstrap-rbac.yml

# 下面是输出

#clusterrolebinding.rbac.authorization.k8s.io "kubelet-bootstrap" created

#clusterrolebinding.rbac.authorization.k8s.io "node-autoapprove-bootstrap" created

#clusterrolebinding.rbac.authorization.k8s.io "node-autoapprove-certificate-rotation" created

#为了方便管理集群,因此需要通过 kubectl logs 来查看,但由于 API 权限,故需要建立一个 RBAC Role 来获取存取权限,这边在k8s-m1节点执行下面命令创建

kubectl apply -f resources/apiserver-to-kubelet-rbac.yml

# 下面是输出

#clusterrole.rbac.authorization.k8s.io "system:kube-apiserver-to-kubelet" configured

#clusterrolebinding.rbac.authorization.k8s.io "system:kube-apiserver" configured

#设定master节点加上污点Taint不让(没有声明容忍该污点的)pod跑在master节点上：

kubectl taint nodes node-role.kubernetes.io/master="":NoSchedule --all

# 下面是输出

# node "k8s-m1" tainted

# node "k8s-m2" tainted

# node "k8s-m3" tainted

# Kubernetes Nodes

# 本部分将说明如何建立与设定Kubernetes Node 角色,Node 是主要执行容器实例(Pod)的工作节点。

# 在开始部署前,先在k8-m1将需要用到的文件复制到所有node节点上

cd ${PKI_DIR}

for NODE in "${!NodeArray[@]}"; do

echo "--- $NODE ${NodeArray[$NODE]} ---"

ssh ${NodeArray[$NODE]} "mkdir -p ${PKI_DIR} ${ETCD_SSL}"

# Etcd

for FILE in etcd-ca.pem etcd.pem etcd-key.pem; do

scp ${ETCD_SSL}/${FILE} ${NodeArray[$NODE]}:${ETCD_SSL}/${FILE}

done

# Kubernetes

for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig ; do

scp ${K8S_DIR}/${FILE} ${NodeArray[$NODE]}:${K8S_DIR}/${FILE}

done

# 部署与设定

# 在k8s-m1节点分发kubelet.service相关文件到每台node上去管理kubelet：

cd ~/k8s-manual-files/

for NODE in "${!NodeArray[@]}"; do

echo "--- $NODE ${NodeArray[$NODE]} ---"

ssh ${NodeArray[$NODE]} "mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d $MANIFESTS_DIR"

scp node/systemd/kubelet.service ${NodeArray[$NODE]}:/lib/systemd/system/kubelet.service

scp node/systemd/10-kubelet.conf ${NodeArray[$NODE]}:/etc/systemd/system/kubelet.service.d/10-kubelet.conf

scp node/etc/kubelet/kubelet-conf.yml ${NodeArray[$NODE]}:/etc/kubernetes/kubelet-conf.yml

done

# 最后在k8s-m1上去启动每个node节点的kubelet 服务:

for NODE in "${!NodeArray[@]}"; do

echo "--- $NODE ${NodeArray[$NODE]} ---"

ssh ${NodeArray[$NODE]} 'systemctl enable --now kubelet.service'

done

# Kubernetes Core Addons部署

# daemonSet方式部署

cd ~/k8s-manual-files

# 注入变量

sed -ri "/server:/s#(: ).+#\1${KUBE_APISERVER}#" addons/kube-proxy/kube-proxy.yml

sed -ri "/image:.+kube-proxy/s#:[^:]+\$#:$KUBE_VERSION#" addons/kube-proxy/kube-proxy.yml

kubectl apply -f addons/kube-proxy/kube-proxy.yml

# 下面是输出

# serviceaccount "kube-proxy" created

# clusterrolebinding.rbac.authorization.k8s.io "system:kube-proxy" created

# configmap "kube-proxy" created

# daemonset.apps "kube-proxy" created

# Calico

# 拉取镜像

curl -s https://zhangguanzhang.github.io/bash/pull.sh | bash -s -- quay.io/calico/node:v3.1.3

curl -s https://zhangguanzhang.github.io/bash/pull.sh | bash -s -- quay.io/calico/cni:v3.1.3

sed -ri "s#\{\{ interface \}\}#${interface}#" addons/calico/v3.1/calico.yml

kubectl apply -f addons/calico/v3.1

kubectl -n kube-system get pod --all-namespaces

# CoreDNS

# 这里节点使用的是hostname,所以建议把hosts关系写到Coredns的解析里

sed -i '57r '<(echo ' hosts {';for NODE in "${!MasterArray[@]}";do echo " ${MasterArray[$NODE]} $NODE"; done;for NODE in "${!NodeArray[@]}";do echo " ${NodeArray[$NODE]} $NODE";done;echo ' }';) addons/coredns/coredns.yml

# 如果后期增加类似解析记录的话可以改cm后(注意cm是yaml格式写的,所以不要使用tab必须用空格)用kill信号让coredns去reload,

# 因为主进程是前台也就是PID为1,找到对应的pod执行即可,也可以利用deploy的更新机制去伪更新实现重启

# kubectl exec coredns-xxxxxx -- kill -SIGUSR1 1

# 在k8s-m1通过 kubeclt 执行下面命令來创建,并检查是否部署成功:

# 注: 目前coredns官方有bug, 在此不使用

# kubectl apply -f addons/coredns/coredns.yml

# kubectl -n kube-system get po -l k8s-app=kube-dns

# 测试coredns正常否看脸,可以下面创建pod来测试

# 先创建一个dnstool的pod

cat<<EOF | kubectl apply -f -

apiVersion: v1

kind: Pod

metadata:

name: busybox

namespace: default

spec:

containers:

- name: busybox

image: busybox:1.28

command:

- sleep

- "3600"

imagePullPolicy: IfNotPresent

restartPolicy: Always

EOF

# nslookup下看看能返回地址不

kubectl exec -ti busybox -- nslookup kubernetes

# 如果已安装的话, 如果CoreDNS工作不正常,先删掉它,删掉后确保coredns的pod和svc不存在

# kubectl delete -f addons/coredns/coredns.yml

# kubectl -n kube-system get pod,svc -l k8s-app=kube-dns

# KubeDNS(如果遇到上面的CoreDNS的bug的话使用它)

kubectl apply -f addons/Kubedns/kubedns.yml

#查看pod状态

kubectl -n kube-system get pod,svc -l k8s-app=kube-dns

#检查集群dns正常否

kubectl exec -ti busybox -- nslookup kubernetes

# 等待官方修复的话可以后期先创建出coredns的deploy,svc会负载到coredns之后再删掉kubedns的副本控制器和pod

# Metrics Server(1.8+的k8s)

kubectl create -f addons/metric-server/metrics-server-1.12+.yml

# Kubernets Extra Addons部署

cd ~/k8s-manual-files

# Dashboard

# 在k8s-m1通过kubectl来建立kubernetes dashboard即可：

kubectl apply -f ExtraAddons/dashboard

kubectl -n kube-system get po,svc -l k8s-app=kubernetes-dashboard

# 完成后,就可以通过浏览器存取Dashboard https://{YOUR_VIP}:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/

# 用如下命令得到token, 复制token,然后贴到Kubernetes dashboard。注意这边一般来说要针对不同User开启特定存取权限。

kubectl -n kube-system describe secrets | sed -rn '/\sdashboard-token-/,/^token/{/^token/s#\S+\s+##p}'

# 这边会额外建立一个名称为anonymous-dashboard-proxy的 Cluster Role(Binding)

# 来让system:anonymous这个匿名使用者能够通过 API Server 来 proxy 到 Kubernetes Dashboard,

# 而这个 RBAC 规则仅能够存取services/proxy资源,以及https:kubernetes-dashboard:资源名称同时

# 在 1.7 版本以后的 Dashboard 将不再提供所有权限,因此需要建立一个 service account 来绑定

# cluster-admin role(这系列已经写在dashboard/anonymous-proxy-rbac.yml里)

# 完成后,就可以通过浏览器存取Dashboard https://{YOUR_VIP}:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/。

kubectl -n kube-system describe secrets | sed -rn '/\sdashboard-token-/,/^token/{/^token/s#\S+\s+##p}'

# 复制token,然后贴到Kubernetes dashboard。注意这边一般来说要针对不同User开启特定存取权限。

# Ingress Controller

# 首先在k8s-m1执行下列命令来建立 Ingress Controller,并检查是否部署正常：

sed -ri 's#\{\{ INGRESS_VIP \}\}#'"${INGRESS_VIP}"'#' ExtraAddons/ingress-controller/ingress-controller-svc.yml

kubectl create ns ingress-nginx

kubectl apply -f ExtraAddons/ingress-controller/

kubectl -n ingress-nginx get po,svc

# External DNS(非公有云下且内网没DNS下很实用)

# 首先在k8s-m1执行下面命令来建立 CoreDNS Server,并检查是否部署正常

sed -ri 's#\{\{ INGRESS_VIP \}\}#'"${INGRESS_VIP}"'#' ExtraAddons/external-dns/coredns/coredns-svc-tcp.yml

sed -ri 's#\{\{ INGRESS_VIP \}\}#'"${INGRESS_VIP}"'#' ExtraAddons/external-dns/coredns/coredns-svc-udp.yml

kubectl create ns external-dns

kubectl create -f ExtraAddons/external-dns/coredns/

kubectl -n external-dns get po,svc

# 接着部署 ExternalDNS 来与 CoreDNS 同步资源记录：

kubectl apply -f ExtraAddons/external-dns/external-dns/

kubectl -n external-dns get po -l k8s-app=external-dns

# Prometheus Operator

# 在k8s-m1通过kubectl来建立Prometheus 需要的元件

kubectl apply -f ExtraAddons/prometheus/

kubectl apply -f ExtraAddons/prometheus/operator/

# 这边要等 operator 起來并建立好 CRDs 才能进行

kubectl apply -f ExtraAddons/prometheus/alertmanater/

kubectl apply -f ExtraAddons/prometheus/node-exporter/

kubectl apply -f ExtraAddons/prometheus/kube-state-metrics/

kubectl apply -f ExtraAddons/prometheus/grafana/

kubectl apply -f ExtraAddons/prometheus/kube-service-discovery/

# 这里建议先执行后面的补全ep信息部分的操作后再回来

kubectl apply -f ExtraAddons/prometheus/prometheus/

kubectl apply -f ExtraAddons/prometheus/servicemonitor/

转自: https://zhangguanzhang.github.io/2018/09/18/kubernetes-1-11-x-bin/

By sean, 6 years01/07/2019 ago

KUBERNETES

etcd 3.1 高可用集群搭建

CentOS 7.4

192.168.61.11 node1
192.168.61.12 node2
192.168.61.13 node3

192.168.61.11 node1

192.168.61.12 node2

192.168.61.13 node3

TLS密钥和证书这里部署的etcd集群使用TLS证书对证书通信进行加密，并开启基于CA根证书签名的双向数字证书认证。下面介绍使用cfssl生成所需要的私钥和证书. centos-mini版本的linux需要安装开发包: yum groupinstall “Development Tools” 安装cfssl cfssl是使用Go语言开发的工具，如果系统中安装了Go，可以使用直接go get安装cfssl: 项目地址:https://github.com/cloudflare/cfssl

go get -u <a class="vglnk" href="http://github.com/cloudflare/cfssl/cmd/" rel="nofollow">github.com/cloudflare/cfssl/cmd/</a>...

1 2	go get -u <a class="vglnk" href="http://github.com/cloudflare/cfssl/cmd/" rel="nofollow">github.com/cloudflare/cfssl/cmd/</a>...

会在$GOPATH/bin下安装cfssl, cfssjosn, mkbundle等工具。 CA证书和私钥创建ca-config.json：

<span class="p">{</span>
  <span class="nt">"signing"</span><span class="p">:</span> <span class="p">{</span>
    <span class="nt">"default"</span><span class="p">:</span> <span class="p">{</span>
      <span class="nt">"expiry"</span><span class="p">:</span> <span class="s2">"87600h"</span>
    <span class="p">},</span>
    <span class="nt">"profiles"</span><span class="p">:</span> <span class="p">{</span>
      <span class="nt">"frognew"</span><span class="p">:</span> <span class="p">{</span>
        <span class="nt">"usages"</span><span class="p">:</span> <span class="p">[</span>
            <span class="s2">"signing"</span><span class="p">,</span>
            <span class="s2">"key encipherment"</span><span class="p">,</span>
            <span class="s2">"server auth"</span><span class="p">,</span>
            <span class="s2">"client auth"</span>
        <span class="p">],</span>
        <span class="nt">"expiry"</span><span class="p">:</span> <span class="s2">"87600h"</span>
      <span class="p">}</span>
    <span class="p">}</span>
  <span class="p">}</span>
<span class="p">}</span>

{

"signing": {

"default": {

"expiry": "87600h"

},

"profiles": {

"frognew": {

"usages": [

"signing",

"key encipherment",

"server auth",

"client auth"

],

"expiry": "87600h"

}

ca-config.json中可以定义多个profile，分别设置不同的expiry和usages等参数。如上面的ca-config.json中定义了名称为frognew的profile，这个profile的expiry 87600h为10年，useages中： signing表示此CA证书可以用于签名其他证书，ca.pem中的CA=TRUE server auth表示TLS Server Authentication client auth表示TLS Client Authentication 创建CA证书签名请求配置ca-csr.json：

<span class="p">{</span>
  <span class="nt">"CN"</span><span class="p">:</span> <span class="s2">"frognew"</span><span class="p">,</span>
  <span class="nt">"key"</span><span class="p">:</span> <span class="p">{</span>
    <span class="nt">"algo"</span><span class="p">:</span> <span class="s2">"rsa"</span><span class="p">,</span>
    <span class="nt">"size"</span><span class="p">:</span> <span class="mi">2048</span>
  <span class="p">},</span>
  <span class="nt">"names"</span><span class="p">:</span> <span class="p">[</span>
    <span class="p">{</span>
      <span class="nt">"C"</span><span class="p">:</span> <span class="s2">"CN"</span><span class="p">,</span>
      <span class="nt">"ST"</span><span class="p">:</span> <span class="s2">"BeiJing"</span><span class="p">,</span>
      <span class="nt">"L"</span><span class="p">:</span> <span class="s2">"BeiJing"</span><span class="p">,</span>
      <span class="nt">"O"</span><span class="p">:</span> <span class="s2">"frognew"</span><span class="p">,</span>
      <span class="nt">"OU"</span><span class="p">:</span> <span class="s2">"cloudnative"</span>
    <span class="p">}</span>
  <span class="p">]</span>
<span class="p">}</span>

{

"CN": "frognew",

"key": {

"algo": "rsa",

"size": 2048

},

"names": [

{

"C": "CN",

"ST": "BeiJing",

"L": "BeiJing",

"O": "frognew",

"OU": "cloudnative"

}

]

}

下面使用cfss生成CA证书和私钥：

cfssl gencert -initca ca-csr.json | cfssljson -bare ca

1 2	cfssl gencert -initca ca-csr.json \| cfssljson -bare ca

ls
ca-config.json  ca.csr  ca-csr.json  ca-key.pem  ca.pem

ca-config.json ca.csr ca-csr.json ca-key.pem ca.pem

ca-key.pem和ca.pem需要保存在一个安全的地方，后边会用到。 etcd证书和私钥创建etcd证书签名请求配置etcd-csr.json：

<span class="p">{</span>
    <span class="nt">"CN"</span><span class="p">:</span> <span class="s2">"frognew"</span><span class="p">,</span>
    <span class="nt">"hosts"</span><span class="p">:</span> <span class="p">[</span>
      <span class="s2">"127.0.0.1"</span><span class="p">,</span>
      <span class="s2">"192.168.61.11"</span><span class="p">,</span>
      <span class="s2">"192.168.61.12"</span><span class="p">,</span>
      <span class="s2">"192.168.61.13"</span><span class="p">,</span>
      <span class="s2">"node1"</span><span class="p">,</span>
      <span class="s2">"node2"</span><span class="p">,</span>
      <span class="s2">"node3"</span>
    <span class="p">],</span>
    <span class="nt">"key"</span><span class="p">:</span> <span class="p">{</span>
        <span class="nt">"algo"</span><span class="p">:</span> <span class="s2">"rsa"</span><span class="p">,</span>
        <span class="nt">"size"</span><span class="p">:</span> <span class="mi">2048</span>
    <span class="p">},</span>
    <span class="nt">"names"</span><span class="p">:</span> <span class="p">[</span>
        <span class="p">{</span>
            <span class="nt">"C"</span><span class="p">:</span> <span class="s2">"CN"</span><span class="p">,</span>
            <span class="nt">"ST"</span><span class="p">:</span> <span class="s2">"BeiJing"</span><span class="p">,</span>
            <span class="nt">"L"</span><span class="p">:</span> <span class="s2">"BeiJing"</span><span class="p">,</span>
            <span class="nt">"O"</span><span class="p">:</span> <span class="s2">"frognew"</span><span class="p">,</span>
            <span class="nt">"OU"</span><span class="p">:</span> <span class="s2">"cloudnative"</span>
        <span class="p">}</span>
    <span class="p">]</span>
<span class="p">}</span>

{

"CN": "frognew",

"hosts": [

"127.0.0.1",

"192.168.61.11",

"192.168.61.12",

"192.168.61.13",

"node1",

"node2",

"node3"

],

"key": {

"algo": "rsa",

"size": 2048

},

"names": [

{

"C": "CN",

"ST": "BeiJing",

"L": "BeiJing",

"O": "frognew",

"OU": "cloudnative"

}

]

}

注意上面配置hosts字段中制定授权使用该证书的IP和域名列表，因为现在要生成的证书需要被etcd集群各个节点使用，所以这里指定了各个节点的IP和hostname。下面生成etcd的证书和私钥：

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=frognew etcd-csr.json | cfssljson -bare etcd

ls etcd*
etcd.csr  etcd-csr.json  etcd-key.pem  etcd.pem

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=frognew etcd-csr.json | cfssljson -bare etcd

ls etcd*

etcd.csr etcd-csr.json etcd-key.pem etcd.pem

对生成的证书可以使用cfssl或openssl查看：

cfssl-certinfo -cert etcd.pem

openssl x509  -noout -text -in  etcd.pem

cfssl-certinfo -cert etcd.pem

openssl x509 -noout -text -in etcd.pem

安装etcd 将CA证书ca.pem, etcd秘钥etcd-key.pem, Read more…

By sean, 7 years11/19/2017 ago

KUBERNETES

k8s集群搭建

我们已经可以很方便的使用kubeadm快速初始化Kubernetes集群，但kubeadm当前还不能用于生产环境，同时kubeadm初始化的集群的Master节点不是高可用的，后端存储etcd也是单点。因此，本文将基于Kubernetes二进制包手动部署一个高可用的Kubernetes 1.6集群，将启用ApiServer的TLS双向认证和RBAC授权等安全机制。通过这个手动部署的过程，我们还可以更加深入理解Kubernetes各组件的交互和运行原理。 1. 环境准备 1.1 系统环境操作系统CentOS 7.3

192.168.61.11 node1
192.168.61.12 node2
192.168.61.13 node3

192.168.61.11 node1

192.168.61.12 node2

192.168.61.13 node3

1.2 安装包下载从这里下载kubernetes二进制安装包：

wget <a href="https://storage.googleapis.com/kubernetes-release-dashpole/release/v1.9.0-alpha.3/kubernetes-server-linux-amd64.tar.gz">https://storage.googleapis.com/kubernetes-release-dashpole/release/v1.9.0-alpha.3/kubernetes-server-linux-amd64.tar.gz</a>

tar -zxvf kubernetes-server-linux-amd64.tar.g

wget <a href="https://storage.googleapis.com/kubernetes-release-dashpole/release/v1.9.0-alpha.3/kubernetes-server-linux-amd64.tar.gz">https://storage.googleapis.com/kubernetes-release-dashpole/release/v1.9.0-alpha.3/kubernetes-server-linux-amd64.tar.gz</a>

tar -zxvf kubernetes-server-linux-amd64.tar.g

1.3 系统配置在各节点创建/etc/sysctl.d/k8s.conf文件，添加如下内容：

net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1

net.bridge.bridge-nf-call-ip6tables = 1

net.bridge.bridge-nf-call-iptables = 1

执行sysctl -p /etc/sysctl.d/k8s.conf使修改生效。如果报以下错:

[root@k8s-master-dev-1 packages]# sysctl -p /etc/sysctl.d/k8s.conf
sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-ip6tables: No such file or directory
sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-iptables: No such file or directory

[root@k8s-master-dev-1 packages]# sysctl -p /etc/sysctl.d/k8s.conf

sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-ip6tables: No such file or directory

sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-iptables: No such file or directory

解决办法:

[root@k8s-master-dev-1 ~]# modprobe br_netfilter
[root@k8s-master-dev-1 ~]# ls /proc/sys/net/bridge
[root@k8s-master-dev-1 ~]# sysctl -p /etc/sysctl.d/k8s.conf

[root@k8s-master-dev-1 ~]# modprobe br_netfilter

[root@k8s-master-dev-1 ~]# ls /proc/sys/net/bridge

[root@k8s-master-dev-1 ~]# sysctl -p /etc/sysctl.d/k8s.conf

禁用selinux：

setenforce 0
vi /etc/selinux/config
SELINUX=disabled

setenforce 0

vi /etc/selinux/config

SELINUX=disabled

参考: https://blog.frognew.com/2017/04/install-ha-kubernetes-1.6-cluster.html#13-系统配置

By sean, 7 years11/19/2017 ago