etcd和apiserver生命周期管理.md

etcd 安装脚本

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set -ex


ftpserver=http://119.91.145.27:12800
mkdir -p /opt/k8s/wal /opt/k8s/data /opt/k8s/bin /opt/k8s/work

cat << EOF > /opt/k8s/work/etcd.conf
ETCD_OPTS="--name node1 \\
--max-request-bytes 10485760 \\
--data-dir /opt/k8s/data \\
--wal-dir /opt/k8s/wal \\
--advertise-client-urls http://127.0.0.1:2379 \\
--listen-client-urls http://127.0.0.1:2379 \\
--listen-peer-urls http://127.0.0.1:2380"
EOF

cat << EOF > /lib/systemd/system/etcd.service
[Unit]
Description=Etcd For Kubernetes
Wants=network-online.target
After=network.target network-online.target

[Service]
EnvironmentFile=/opt/k8s/work/etcd.conf
ExecStart=/opt/k8s/bin/etcd $ETCD_OPTS
Restart=always

[Install]
WantedBy=multi-user.target
EOF

wget -P /opt/k8s/bin/ --http-user=team  --http-passwd=xdmybl ${ftpserver}/repo/kubernetes/etcd
chmod +x /opt/k8s/bin/etcd
systemctl daemon-reload
systemctl start etcd

apiserver 安装脚本

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#!/bin/bash

# 安装 apiserver 的脚本(包括 etcd 的安装)
# 单台机器架构 ( 单节点 etcd 单台 apiserver )

# 判断是否存在 etcd, 没有则安装
unit_name=etcd
if  systemctl list-unit-files | grep -q "^$unit_name" ; then
  echo "$unit_name exists"
else
  echo "$unit_name does not exist"
  ./install_etcd.sh
fi

# 假设 etcd 是监听 127.0.0.1:2379 2380

# 需要填apiserver 的监听地址
LOCALIP=127.0.0.1


#------------------------------------------------------------
# wget
ftp_server=http://119.91.145.27:12800

mkdir -p /opt/k8s && cd /opt/k8s
wget --http-user=team  --http-passwd=xdmybl ${ftp_server}/kubernetes/kube-apiserver
wget --http-user=team  --http-passwd=xdmybl ${ftp_server}/kubernetes/kubectl
chmod +x kubectl && chmod +x kube-apiserver
# 链接
ln -s ${PWD}/kubectl /usr/local/bin/
# 需要空格
cat >> /etc/profile << EOF

alias k="kubectl"

EOF
#------------------------------------------------------------

# 生成 证书
#------------------------------------------------------------
# 获取 cfssl 在 ./bin目录下
ftp_server=http://119.91.145.27:12800

mkdir -p /opt/k8s/work && cd /opt/k8s
wget --http-user=team  --http-passwd=xdmybl  ${ftp_server}/kubernetes/cfssl/cfssl_linux-amd64
wget --http-user=team  --http-passwd=xdmybl  ${ftp_server}/kubernetes/cfssl/cfssljson_linux-amd64
mv cfssl_linux-amd64 cfssl && chmod +x cfssl
mv cfssljson_linux-amd64 cfssljson && chmod +x cfssljson
ln -s ${PWD}/cfssl /usr/local/bin
ln -s ${PWD}/cfssljson /usr/local/bin

# 创建 logs 目录
mkdir -p /opt/k8s/logs

cd work
# 需要
# ca-csr.json
# ca-config.json
# server-csr.json
# admin-csr.json 用于生成 kubectl admin 用户 kubeconfig

# 生成 ca-csr.json
cat << EOF >> ca-csr.json
{
  "CN": "kubernetes",
  "hosts": [
    "$LOCALIP",
    "kubernetes",
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.cluster",
    "kubernetes.default.svc.cluster.local."
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Shanghai",
      "L": "Shanghai",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

# ca-config.json
cat << EOF >> ca-config.json
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

cat << EOF > server-csr.json
{
  "CN": "kubernetes",
  "hosts": [
    "$LOCALIP",
    "kubernetes",
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.cluster",
    "kubernetes.default.svc.cluster.local."
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Shanghai",
      "L": "Shanghai",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

cat << EOF > admin-csr.json
{
  "CN": "admin",
  "hosts": [
    "$LOCALIP",
    "kubernetes",
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.cluster",
    "kubernetes.default.svc.cluster.local."
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "O": "system:masters",
      "OU": "System",
      "L": "Shanghai",
      "ST": "Shanghai"
    }
  ]
}
EOF

# 签发 ca
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
# 签发 apiserver 证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
# 签发 admin 用户证书，绑定用户角色，供 kubectl KUBECONFIG 使用
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin

# token
cat > token.csv << EOF
c47ffb939f5ca36231d9e3121a252940,jane,1
a1232123131231231231231231233112,cluster-admin,2,system:masters
b4564546555565444564564544545645,admin,3,system:masters
EOF

# apiserver bootstrap
cat << EOF > kube-apiserver.conf
KUBE_APISERVER_OPTS="--logtostderr=false \\
--v=5 \\
--etcd-servers=http://127.0.0.1:2379 \\
--bind-address=$LOCALIP \\
--secure-port=6443 \\
--advertise-address=$LOCALIP \\
--allow-privileged=true \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \\
--authorization-mode=RBAC,Node \\
--enable-bootstrap-token-auth=true \\
--token-auth-file=/opt/k8s/work/token.csv \\
--service-node-port-range=30000-32767 \\
--kubelet-client-certificate=/opt/k8s/work/server.pem \\
--kubelet-client-key=/opt/k8s/work/server-key.pem \\
--tls-cert-file=/opt/k8s/work/server.pem  \\
--tls-private-key-file=/opt/k8s/work/server-key.pem \\
--client-ca-file=/opt/k8s/work/ca.pem \\
--service-account-key-file=/opt/k8s/work/ca-key.pem \\
--service-account-issuer=api \\
--service-account-signing-key-file=/opt/k8s/work/server-key.pem \\
--requestheader-client-ca-file=/opt/k8s/work/ca.pem \\
--proxy-client-cert-file=/opt/k8s/work/server.pem \\
--proxy-client-key-file=/opt/k8s/work/server-key.pem \\
--requestheader-allowed-names=kubernetes \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true \\
--audit-log-maxage=30 \\
--audit-log-maxbackup=3 \\
--audit-log-maxsize=100 \\
--audit-log-path=/opt/k8s/logs/k8s-audit.log"
EOF

#------------------------------------------------------------

# 生成 service
#------------------------------------------------------------
cat << EOF > /lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=/opt/k8s/work/kube-apiserver.conf
ExecStart=/opt/k8s/kube-apiserver \$KUBE_APISERVER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl start kube-apiserver.service
#------------------------------------------------------------

# 生成 kubeconfig
#------------------------------------------------------------
mkdir -p /root/.kube/ && cd /root/.kube
# 生成 kubectl 的 kubeconfig


kubectl config set-cluster kubernetes \
    --certificate-authority=/opt/k8s/work/ca.pem \
    --embed-certs=true \
    --server=https://${LOCALIP}:6443 \
    --kubeconfig=config
    
kubectl config set-credentials cluster-admin \
    --client-certificate=/opt/k8s/work/admin.pem \
    --client-key=/opt/k8s/work/admin-key.pem \
    --embed-certs=true \
    --kubeconfig=config

kubectl config set-context default \
    --cluster=kubernetes \
    --user=cluster-admin \
    --kubeconfig=config

kubectl config use-context default --kubeconfig=config
kubectl get ns
#------------------------------------------------------------
domain > k8s
#apiserver #etcd #kubernetes
etcd和apiserver生命周期管理.md
https://abrance.github.io/2024/03/19/domain/k8s/etcd和apiserver生命周期管理/
Author
xiaoy
Posted on
March 19, 2024
Licensed under