k8s1.27.2 最新版本二进制高可用部署
标签（空格分隔）： kubernetes系列。
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标签（空格分隔）： kubernetes系列
一： 系统环境初始化
1.1 系统环境
系统：
rockyLinux8.8x64
主机名与角色分配
cat /etc/hosts
----
172.16.10.21 flyfish21 k8s-master/k8s-node etcd
172.16.10.22 flyfish22 k8s-master/k8s-node etcd
172.16.10.23 flyfish23 k8s-master/k8s-node etcd
172.16.10.24 flyfish24 k8s-node
172.16.10.25 flyfish25 k8s-node
172.16.10.26 flyfish26 nginx-server keepalived
172.16.10.27 flyfish27 nginx-server keepalived
172.16.10.200 ngixn-SLB
-----
1.2 下载工具准备
1.下载kubernetes1.27.+的二进制包
github二进制包下载地址：https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.26.md
wget https://dl.k8s.io/v1.27.2/kubernetes-server-linux-amd64.tar.gz
2.下载etcdctl二进制包
github二进制包下载地址：https://github.com/etcd-io/etcd/releases
wget https://github.com/etcd-io/etcd/releases/download/v3.5.5/etcd-v3.5.5-linux-amd64.tar.gz
3.docker-ce二进制包下载地址
二进制包下载地址：https://download.docker.com/linux/static/stable/x86_64/
这里需要下载20.10.+版本
wget https://download.docker.com/linux/static/stable/x86_64/docker-20.10.24.tgz
4.下载cri-docker
二进制包下载地址：https://github.com/Mirantis/cri-dockerd/releases/
wget https://ghproxy.com/https://github.com/Mirantis/cri-dockerd/releases/download/v0.2.6/cri-dockerd-0.2.6.amd64.tgz
5.containerd二进制包下载
github下载地址：https://github.com/containerd/containerd/releases
containerd下载时下载带cni插件的二进制包。
wget https://github.com/containerd/containerd/releases/download/v1.6.6/cri-containerd-cni-1.6.6-linux-amd64.tar.gz
6.下载cfssl二进制包
github二进制包下载地址：https://github.com/cloudflare/cfssl/releases
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl-certinfo_1.6.1_linux_amd64
7.cni插件下载
github下载地址：https://github.com/containernetworking/plugins/releases
wget https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz
8.crictl客户端二进制下载
github下载：https://github.com/kubernetes-sigs/cri-tools/releases
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.24.2/crictl-v1.24.2-linux-amd64.tar.gz
1.3系统初始化
# 安装依赖包
yum -y install wget jq psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git network-scripts tar curl -y
# 关闭防火墙 与selinux
systemctl disable --now firewalld
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
# 关闭交换分区
sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a && sysctl -w vm.swappiness=0
cat /etc/fstab
# /dev/mapper/centos-swap swap swap defaults 0 0
#
# 配置系统句柄数
ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* seft memlock unlimited
* hard memlock unlimitedd
EOF
# 做系统无密码互信登陆
yum install -y sshpass
ssh-keygen -f /root/.ssh/id_rsa -P ''
export IP="172.16.10.21 172.16.10.22 172.16.10.23 172.16.10.23 172.16.10.24 172.16.10.25 172.16.10.26 172.16.10.27"
export SSHPASS=flyfish225
for HOST in $IP;do
sshpass -e ssh-copy-id -o StrictHostKeyChecking=no $HOST
done
# 升级系统内核
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
yum install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm
修改阿里云 镜像源
mv /etc/yum.repos.d/elrepo.repo /etc/yum.repos.d/elrepo.repo.bak
vim /etc/yum.repos.d/elrepo.repo
----
[elrepo-kernel]
name=elrepoyum
baseurl=https://mirrors.aliyun.com/elrepo/kernel/el8/x86_64/
enable=1
gpgcheck=0
----
yum --enablerepo=elrepo-kernel install kernel-lt
#使用序号为0的内核，序号0是前面查出来的可用内核编号
grub2-set-default 0
#生成 grub 配置文件并重启
grub2-mkconfig -o /boot/grub2/grub.cfg
reboot
启用ipvs
yum install ipvsadm ipset sysstat conntrack libseccomp -y
mkdir -p /etc/modules-load.d/
cat >> /etc/modules-load.d/ipvs.conf <<EOF
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF
systemctl restart systemd-modules-load.service
lsmod | grep -e ip_vs -e nf_conntrack
ip_vs_sh 16384 0
ip_vs_wrr 16384 0
ip_vs_rr 16384 0
ip_vs 180224 6 ip_vs_rr,ip_vs_sh,ip_vs_wrr
nf_conntrack 176128 1 ip_vs
nf_defrag_ipv6 24576 2 nf_conntrack,ip_vs
nf_defrag_ipv4 16384 1 nf_conntrack
libcrc32c 16384 3 nf_conntrack,xfs,ip_vs
1.4 修改内核参数
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
vm.overcommit_memory = 1
vm.panic_on_oom = 0
fs.inotify.max_user_watches = 89100
fs.file-max = 52706963
fs.nr_open = 52706963
net.netfilter.nf_conntrack_max = 2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl = 15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.all.forwarding = 1
EOF
modprobe br_netfilter
lsmod |grep conntrack
modprobe ip_conntrack
sysctl -p /etc/sysctl.d/k8s.conf
1.5 所有节点安装docker
下载地址：https://download.docker.com/linux/static/stable/x86_64/docker-20.10.24.tgz
以下在所有节点操作。这里采用二进制安装，用yum安装也一样,所有节点全部安装docker
# 二进制包下载地址：https://download.docker.com/linux/static/stable/x86_64/
# wget https://download.docker.com/linux/static/stable/x86_64/docker-20.10.24.tgz
#解压
tar xf docker-*.tgz
#拷贝二进制文件
cp docker/* /usr/bin/
#创建containerd的service文件,并且启动
cat >/etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target
[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=1048576
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF
systemctl enable --now containerd.service
#准备docker的service文件
cat > /etc/systemd/system/docker.service <<EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service
[Service]
Type=notify
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process
OOMScoreAdjust=-500
[Install]
WantedBy=multi-user.target
EOF
#准备docker的socket文件
cat > /etc/systemd/system/docker.socket <<EOF
[Unit]
Description=Docker Socket for the API
[Socket]
ListenStream=/var/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
[Install]
WantedBy=sockets.target
EOF
#创建docker组
groupadd docker
#启动docker
systemctl enable --now docker.socket && systemctl enable --now docker.service
#验证
docker info
cat >/etc/docker/daemon.json <<EOF
{
"exec-opts": ["native.cgroupdriver=systemd"],
"registry-mirrors": [
"https://docker.mirrors.ustc.edu.cn",
"http://hub-mirror.c.163.com"
],
"max-concurrent-downloads": 10,
"log-driver": "json-file",
"log-level": "warn",
"log-opts": {
"max-size": "10m",
"max-file": "3"
},
"data-root": "/var/lib/docker"
}
EOF
systemctl restart docker
安装cri-dockerd
# 由于1.24以及更高版本不支持docker所以安装cri-docker
# 下载cri-docker
# wget https://ghproxy.com/https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.1/cri-dockerd-0.3.1.amd64.tgz
# 解压cri-docker
tar -zxvf cri-dockerd-0.3.1.amd64.tgz
cp cri-dockerd/cri-dockerd /usr/bin/
chmod +x /usr/bin/cri-dockerd
# 写入启动配置文件
cat > /usr/lib/systemd/system/cri-docker.service <<EOF
[Unit]
Description=CRI Interface for Docker Application Container Engine
Documentation=https://docs.mirantis.com
After=network-online.target firewalld.service docker.service
Wants=network-online.target
Requires=cri-docker.socket
[Service]
Type=notify
ExecStart=/usr/bin/cri-dockerd --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.9
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process
[Install]
WantedBy=multi-user.target
EOF
# 写入socket配置文件
cat > /usr/lib/systemd/system/cri-docker.socket <<EOF
[Unit]
Description=CRI Docker Socket for the API
PartOf=cri-docker.service
[Socket]
ListenStream=%t/cri-dockerd.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
[Install]
WantedBy=sockets.target
EOF
# 进行启动cri-docker
systemctl daemon-reload ; systemctl enable cri-docker --now
二：部署etcd 服务
2.1 设置关于签名证书
下载：
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.2_linux_amd64
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.2_linux_amd64
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl-certinfo_1.6.1_linux_amd64
mv cfssl_1.6.1_linux_amd64 /usr/bin/cfssl
mv cfssljson_1.6.1_linux_amd64 /usr/bin/cfssljson
mv cfssl-certinfo_1.6.1_linux_amd64 /usr/bin/cfssl-certinfo
chmod +x /usr/bin/cfssl*
mkdir -p ~/TLS/{etcd,k8s}
cd ~/TLS/etcd
#自签CA：
cat > ca-config.json << EOF
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"www": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
cat > ca-csr.json << EOF
{
"CN": "etcd CA",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
EOF
#生成证书：
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
会生成ca.pem和ca-key.pem文件
#使用自签CA签发Etcd HTTPS证书
#创建证书申请文件：
cat > server-csr.json << EOF
{
"CN": "etcd",
"hosts": [
"172.16.10.21",
"172.16.10.22",
"172.16.10.23",
"172.16.10.24",
"172.16.10.25",
"172.16.10.26",
"172.16.10.27",
"172.16.10.28",
"172.16.10.29",
"172.16.10.200"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing"
}
]
}
EOF
#注：上述文件hosts字段中IP为所有etcd节点的集群内部通信IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP。
#生成证书：
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
#会生成server.pem和server-key.pem文件。
1. Etcd 的概念：
Etcd 是一个分布式键值存储系统，Kubernetes使用Etcd进行数据存储，所以先准备一个Etcd数据库，为解决Etcd单点故障，应采用集群方式部署，这里使用3台组建集群，可容忍1台机器故障，当然，你也可以使用5台组建集群，可容忍2台机器故障。
下载地址： https://github.com/etcd-io/etcd/releases
以下在节点flyfish21上操作，为简化操作，待会将节点flyfish21生成的所有
文件拷贝到节点flyfish22和节点flyfish23.
2. 安装配置etcd
mkdir /opt/etcd/{bin,cfg,ssl} -p
tar zxvf etcd-v3.5.5-linux-amd64.tar.gz
mv etcd-v3.5.5-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/
#flyfish21 etcd 配置文件
cat > /opt/etcd/cfg/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://172.16.10.21:2380"
ETCD_LISTEN_CLIENT_URLS="https://172.16.10.21:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://172.16.10.21:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://172.16.10.21:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://172.16.10.21:2380,etcd-2=https://172.16.10.22:2380,etcd-3=https://172.16.10.23:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF
---
ETCD_NAME：节点名称，集群中唯一
ETCD_DATA_DIR：数据目录
ETCD_LISTEN_PEER_URLS：集群通信监听地址
ETCD_LISTEN_CLIENT_URLS：客户端访问监听地址
ETCD_INITIAL_ADVERTISE_PEER_URLS：集群通告地址
ETCD_ADVERTISE_CLIENT_URLS：客户端通告地址
ETCD_INITIAL_CLUSTER：集群节点地址
ETCD_INITIAL_CLUSTER_TOKEN：集群Token
ETCD_INITIAL_CLUSTER_STATE：加入集群的当前状态，new是新集群，existing表示加入已有集群
3. systemd管理etcd
cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd.conf
ExecStart=/opt/etcd/bin/etcd \
--cert-file=/opt/etcd/ssl/server.pem \
--key-file=/opt/etcd/ssl/server-key.pem \
--peer-cert-file=/opt/etcd/ssl/server.pem \
--peer-key-file=/opt/etcd/ssl/server-key.pem \
--trusted-ca-file=/opt/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem \
--logger=zap
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
2.2 安装etcd
#拷贝刚才生成的证书
#把刚才生成的证书拷贝到配置文件中的路径：
cp ~/TLS/etcd/ca*pem ~/TLS/etcd/server*pem /opt/etcd/ssl/
5. 同步所有主机
scp -r /opt/etcd/ root@172.16.10.22:/opt/
scp -r /opt/etcd/ root@172.16.10.23:/opt/
scp /usr/lib/systemd/system/etcd.service root@172.16.10.22:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/etcd.service root@172.16.10.23:/usr/lib/systemd/system/
flyfish22 etcd
vim /opt/etcd/cfg/etcd.conf
-----
#[Member]
ETCD_NAME="etcd-2"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://172.16.10.22:2380"
ETCD_LISTEN_CLIENT_URLS="https://172.16.10.22:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://172.16.10.22:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://172.16.10.22:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://172.16.10.21:2380,etcd-2=https://172.16.10.22:2380,etcd-3=https://172.16.10.23:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
----
flyfish23 etcd
vim /opt/etcd/cfg/etcd.conf
----
#[Member]
ETCD_NAME="etcd-3"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://172.16.10.23:2380"
ETCD_LISTEN_CLIENT_URLS="https://172.16.10.23:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://172.16.10.23:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://172.16.10.23:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://172.16.10.21:2380,etcd-2=https://172.16.10.22:2380,etcd-3=https://172.16.10.23:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
-----
启动etcd:
systemctl daemon-reload
systemctl start etcd
systemctl enable etcd
验证：
ETCDCTL_API=3 /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://172.16.10.21:2379,https://172.16.10.22:2379,https://172.16.10.23:2379" endpoint health --write-out=table
三：部署k8s1.27.x
3.1 k8s 1.27.x 最新版本下载
1. 从Github下载二进制文件
下载地址：
https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.27.md
注：打开链接你会发现里面有很多包，下载一个server包就够了，包含了Master和Worker Node二进制文件。
3.2 生成k8s1.27.x 证书
#创建k8s 的kube-apiserver证书
cd ~/TLS/k8s
cat > ca-config.json << EOF
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"kubernetes": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
cat > ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
#生成证书：
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
会生成ca.pem和ca-key.pem文件。
#使用自签CA签发kube-apiserver HTTPS证书
#创建证书申请文件：
cat > server-csr.json << EOF
{
"CN": "kubernetes",
"hosts": [
"10.0.0.1",
"127.0.0.1",
"172.16.10.21",
"172.16.10.22",
"172.16.10.23",
"172.16.10.24",
"172.16.10.25",
"172.16.10.26",
"172.16.10.27",
"172.16.10.28",
"172.16.10.29",
"172.16.10.200",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
#注：上述文件hosts字段中IP为所有Master/LB/VIP IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP。
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
#会生成server.pem和server-key.pem文件。
3.3 安装k8s 1.27.x
#部署k8s1.27.2
#解压二进制包
mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs}
tar -zxvf kubernetes-server-linux-v1.27.2-amd64.tar
cd kubernetes/server/bin
cp kube-apiserver kube-scheduler kube-controller-manager /opt/kubernetes/bin
cp kubectl /usr/bin/
cp kubectl /usr/local/bin/
3.3.1 部署kube-apiserver
#部署kube-apiserver
#创建配置文件
vim /opt/kubernetes/cfg/kube-apiserver.conf
-----
KUBE_APISERVER_OPTS="--enable-admission-plugins=NamespaceLifecycle,NodeRestriction,LimitRanger,ServiceAccount,DefaultStorageClass,ResourceQuota \
--v=2 \
--etcd-servers=https://172.16.10.21:2379,https://172.16.10.22:2379,https://172.16.10.23:2379 \
--bind-address=172.16.10.21 \
--secure-port=6443 \
--advertise-address=172.16.10.21 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth=true \
--token-auth-file=/opt/kubernetes/cfg/token.csv \
--service-node-port-range=30000-32767 \
--kubelet-client-certificate=/opt/kubernetes/ssl/server.pem \
--kubelet-client-key=/opt/kubernetes/ssl/server-key.pem \
--tls-cert-file=/opt/kubernetes/ssl/server.pem \
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \
--client-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \
--service-account-issuer=api \
--service-account-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/opt/etcd/ssl/ca.pem \
--etcd-certfile=/opt/etcd/ssl/server.pem \
--etcd-keyfile=/opt/etcd/ssl/server-key.pem \
--requestheader-client-ca-file=/opt/kubernetes/ssl/ca.pem \
--proxy-client-cert-file=/opt/kubernetes/ssl/server.pem \
--proxy-client-key-file=/opt/kubernetes/ssl/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 \
--service-account-issuer=https://kubernetes.default.svc.cluster.local \
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
--audit-log-path=/opt/kubernetes/logs/k8s-audit.log"
------
注：上面两个\ \ 第一个是转义符，第二个是换行符，使用转义符是为了使用EOF保留换行符。
• ---v：日志等级
• --etcd-servers：etcd集群地址
• --bind-address：监听地址
• --secure-port：https安全端口
• --advertise-address：集群通告地址
• --allow-privileged：启用授权
• --service-cluster-ip-range：Service虚拟IP地址段
• --enable-admission-plugins：准入控制模块
• --authorization-mode：认证授权，启用RBAC授权和节点自管理
• --enable-bootstrap-token-auth：启用TLS bootstrap机制
• --token-auth-file：bootstrap token文件
• --service-node-port-range：Service nodeport类型默认分配端口范围
• --kubelet-client-xxx：apiserver访问kubelet客户端证书
• --tls-xxx-file：apiserver https证书
• 1.20版本必须加的参数：--service-account-issuer，--service-account-signing-key-file
• --etcd-xxxfile：连接Etcd集群证书
• --audit-log-xxx：审计日志
• 启动聚合层相关配置：--requestheader-client-ca-file，--proxy-client-cert-file，--proxy-client-key-file，--requestheader-allowed-names，--requestheader-extra-headers-prefix，--requestheader-group-headers，--requestheader-username-headers，--enable-aggregator-routing
#拷贝刚才生成的证书
#把刚才生成的证书拷贝到配置文件中的路径：
cp ~/TLS/k8s/ca*pem ~/TLS/k8s/server*pem /opt/kubernetes/ssl/
#启用 TLS Bootstrapping 机制
TLS Bootstraping：Master apiserver启用TLS认证后，Node节点kubelet和
kube-proxy要与kube-apiserver进行通信，必须使用CA签发的有效证书才可以，
当Node节点很多时，这种客户端证书颁发需要大量工作，同样也会增加集群扩展复杂度。
为了简化流程，Kubernetes引入了TLS bootstraping机制来自动颁发客户端证书，
kubelet会以一个低权限用户自动向apiserver申请证书，
kubelet的证书由apiserver动态签署。
所以强烈建议在Node上使用这种方式，目前主要用于kubelet，kube-proxy
还是由我们统一颁发一个证书。
创建上述配置文件中token文件：
cat > /opt/kubernetes/cfg/token.csv << EOF
c47ffb939f5ca36231d9e3121a252940,kubelet-bootstrap,10001,"system:node-bootstrapper"
EOF
格式：token，用户名，UID，用户组
token也可自行生成替换：
head -c 16 /dev/urandom | od -An -t x | tr -d ' '
#systemd管理apiserver
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-apiserver.conf
ExecStart=/opt/kubernetes/bin/kube-apiserver \$KUBE_APISERVER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
#启动并设置开机启动
systemctl daemon-reload
systemctl start kube-apiserver
systemctl enable kube-apiserver
3.3.2 部署kube-controller-manager
#部署kube-controller-manager
#1. 创建配置文件
cat > /opt/kubernetes/cfg/kube-controller-manager.conf << EOF
KUBE_CONTROLLER_MANAGER_OPTS=" \\
--v=2 \\
--leader-elect=true \\
--kubeconfig=/opt/kubernetes/cfg/kube-controller-manager.kubeconfig \\
--bind-address=127.0.0.1 \\
--allocate-node-cidrs=true \\
--cluster-cidr=10.244.0.0/16 \\
--service-cluster-ip-range=10.0.0.0/24 \\
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \\
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--root-ca-file=/opt/kubernetes/ssl/ca.pem \\
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--cluster-signing-duration=87600h0m0s"
EOF
•--kubeconfig：连接apiserver配置文件
•--leader-elect：当该组件启动多个时，自动选举（HA）
•--cluster-signing-cert-file/--cluster-signing-key-file：自动为kubelet颁发证书的CA，与apiserver保持一致
2. 生成kubeconfig文件
生成kube-controller-manager证书：
# 切换工作目录
cd ~/TLS/k8s
# 创建证书请求文件
cat > kube-controller-manager-csr.json << EOF
{
"CN": "system:kube-controller-manager",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "system:masters",
"OU": "System"
}
]
}
EOF
# 生成证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-controller-manager-csr.json | cfssljson -bare kube-controller-manager
生成kubeconfig文件（以下是shell命令，直接在终端执行）：
KUBE_CONFIG="/opt/kubernetes/cfg/kube-controller-manager.kubeconfig"
KUBE_APISERVER="https://172.16.10.21:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials kube-controller-manager \
--client-certificate=./kube-controller-manager.pem \
--client-key=./kube-controller-manager-key.pem \
--embed-certs=true \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
--cluster=kubernetes \
--user=kube-controller-manager \
--kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}
# systemd管理controller-manager
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-controller-manager.conf
ExecStart=/opt/kubernetes/bin/kube-controller-manager \$KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
#启动并设置开机启动
systemctl daemon-reload
systemctl start kube-controller-manager
systemctl enable kube-controller-manager
3.3.3 部署kube-scheduler
部署kube-scheduler
1. 创建配置文件
cat > /opt/kubernetes/cfg/kube-scheduler.conf << EOF
KUBE_SCHEDULER_OPTS=" \\
--v=2 \\
--leader-elect \\
--kubeconfig=/opt/kubernetes/cfg/kube-scheduler.kubeconfig \\
--bind-address=127.0.0.1"
EOF
•--kubeconfig：连接apiserver配置文件
•--leader-elect：当该组件启动多个时，自动选举（HA）
#生成kubeconfig文件
生成kube-scheduler证书：
# 切换工作目录
cd ~/TLS/k8s
# 创建证书请求文件
cat > kube-scheduler-csr.json << EOF
{
"CN": "system:kube-scheduler",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "system:masters",
"OU": "System"
}
]
}
EOF
# 生成证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-scheduler-csr.json | cfssljson -bare kube-scheduler
生成kubeconfig文件：
KUBE_CONFIG="/opt/kubernetes/cfg/kube-scheduler.kubeconfig"
KUBE_APISERVER="https://172.16.10.21:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials kube-scheduler \
--client-certificate=./kube-scheduler.pem \
--client-key=./kube-scheduler-key.pem \
--embed-certs=true \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
--cluster=kubernetes \
--user=kube-scheduler \
--kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}
3. systemd管理scheduler
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-scheduler.conf
ExecStart=/opt/kubernetes/bin/kube-scheduler \$KUBE_SCHEDULER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
启动并设置开机启动
systemctl daemon-reload
systemctl start kube-scheduler
systemctl enable kube-scheduler
3.3.4 查看集群状态
#查看集群状态
#生成kubectl连接集群的证书：
cd /root/TLS/k8s/
cat > admin-csr.json <<EOF
{
"CN": "admin",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "system:masters",
"OU": "System"
}
]
}
EOF
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
生成kubeconfig文件：
mkdir /root/.kube
KUBE_CONFIG="/root/.kube/config"
KUBE_APISERVER="https://172.16.10.21:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials cluster-admin \
--client-certificate=./admin.pem \
--client-key=./admin-key.pem \
--embed-certs=true \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
--cluster=kubernetes \
--user=cluster-admin \
--kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}
通过kubectl工具查看当前集群组件状态：
kubectl get cs
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-2 Healthy {"health":"true"}
etcd-1 Healthy {"health":"true"}
etcd-0 Healthy {"health":"true"}
如上输出说明Master节点组件运行正常。
授权kubelet-bootstrap用户允许请求证书
kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap
四： 部署worker节点
4.1 创建工作目录并拷贝二进制文件
在所有worker node创建工作目录：
mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs}
从master节点拷贝：
cd /root/
cd kubernetes/server/bin
cp kubelet kube-proxy /opt/kubernetes/bin # 本地拷贝
4.2 部署kubelet
1. 创建配置文件
vim /opt/kubernetes/cfg/kubelet.conf
------
KUBELET_OPTS=" \
--v=2 \
--hostname-override=flyfish21 \
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \
--config=/opt/kubernetes/cfg/kubelet-config.yml \
--cert-dir=/opt/kubernetes/ssl \
--runtime-request-timeout=15m \
--container-runtime-endpoint=unix:///run/cri-dockerd.sock \
--cgroup-driver=systemd \
--node-labels=node.kubernetes.io/node=''"
------
#配置参数文件
cat > /opt/kubernetes/cfg/kubelet-config.yml << EOF
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local
failSwapOn: false
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /opt/kubernetes/ssl/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
maxOpenFiles: 1000000
maxPods: 110
EOF
#生成kubelet初次加入集群引导kubeconfig文件
KUBE_CONFIG="/opt/kubernetes/cfg/bootstrap.kubeconfig"
KUBE_APISERVER="https://172.16.10.21:6443" # apiserver IP:PORT
TOKEN="c47ffb939f5ca36231d9e3121a252940" # 与token.csv里保持一致
# 生成 kubelet bootstrap kubeconfig 配置文件
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials "kubelet-bootstrap" \
--token=${TOKEN} \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
--cluster=kubernetes \
--user="kubelet-bootstrap" \
--kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}
systemd管理kubelet
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
After=docker.service
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kubelet.conf
ExecStart=/opt/kubernetes/bin/kubelet \$KUBELET_OPTS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
启动并设置开机启动
systemctl daemon-reload
systemctl start kubelet
systemctl enable kubelet
批准kubelet证书申请并加入集群
# 查看kubelet证书请求
kubectl get csr
NAME AGE SIGNERNAME REQUESTOR REQUESTEDDURATION CONDITION
node-csr-DGqL2wo4xA4k-_RvDcMm2Fj67VdNRaq0RZFc3Y_A32I 44s kubernetes.io/kube-apiserver-client-kubelet kubelet-bootstrap <none> Pending
# 批准申请
kubectl certificate approve node-csr-DGqL2wo4xA4k-_RvDcMm2Fj67VdNRaq0RZFc3Y_A32I
# 查看节点
[root@rocksrvs01 bin]# kubectl get node
NAME STATUS ROLES AGE VERSION
flyfish21 NotReady <none> 5s v1.27.2
4.3 部署kube-proxy
1. 创建配置文件
cat > /opt/kubernetes/cfg/kube-proxy.conf << EOF
KUBE_PROXY_OPTS=" \\
--v=2 \\
--config=/opt/kubernetes/cfg/kube-proxy-config.yml"
EOF
2. 配置参数文件
cat > /opt/kubernetes/cfg/kube-proxy-config.yml << EOF
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
metricsBindAddress: 0.0.0.0:10249
clientConnection:
kubeconfig: /opt/kubernetes/cfg/kube-proxy.kubeconfig
hostnameOverride: flyfish21
clusterCIDR: 10.244.0.0/16
mode: ipvs
ipvs:
scheduler: "rr"
iptables:
masqueradeAll: true
EOF
#生成kube-proxy.kubeconfig文件
# 切换工作目录
cd ~/TLS/k8s
# 创建证书请求文件
cat > kube-proxy-csr.json << EOF
{
"CN": "system:kube-proxy",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
# 生成证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
#生成kubeconfig文件：
KUBE_CONFIG="/opt/kubernetes/cfg/kube-proxy.kubeconfig"
KUBE_APISERVER="https://172.16.10.21:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials kube-proxy \
--client-certificate=./kube-proxy.pem \
--client-key=./kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}
systemd管理kube-proxy
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Proxy
After=network.target
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-proxy.conf
ExecStart=/opt/kubernetes/bin/kube-proxy \$KUBE_PROXY_OPTS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
启动并设置开机启动
systemctl daemon-reload
systemctl start kube-proxy
systemctl enable kube-proxy
五：部署calico网络
网络组件有很多种，只需要部署其中一个即可，推荐Calico。
Calico是一个纯三层的数据中心网络方案，Calico支持广泛的平台，包括Kubernetes、OpenStack等。
Calico 在每一个计算节点利用 Linux Kernel 实现了一个高效的虚拟路由器（ vRouter） 来负责数据转发，而每个 vRouter 通过 BGP 协议负责把自己上运行的 workload 的路由信息向整个 Calico 网络内传播。
此外，Calico 项目还实现了 Kubernetes 网络策略，提供ACL功能。
1.下载Calico
wget https://docs.tigera.io/archive/v3.25/manifests/calico.yaml
vim calico.yaml
...
- name: CALICO_IPV4POOL_CIDR
value: "10.244.0.0/16"
...
cat calico.yaml |grep image
docker pull docker.io/calico/cni:v3.25.0
docker pull docker.io/calico/node:v3.25.0
docker pull docker.io/calico/kube-controllers:v3.25.0
kubectl apply -f calico.yaml
kubectl get node,pod -n kube-system
授权apiserver访问kubelet
应用场景：例如kubectl logs
cat > apiserver-to-kubelet-rbac.yaml << EOF
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:kube-apiserver-to-kubelet
rules:
- apiGroups:
- ""
resources:
- nodes/proxy
- nodes/stats
- nodes/log
- nodes/spec
- nodes/metrics
- pods/log
verbs:
- "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: system:kube-apiserver
namespace: ""
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:kube-apiserver-to-kubelet
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: kubernetes
EOF
kubectl apply -f apiserver-to-kubelet-rbac.yaml
六：新增加一个worker node
6.1 同步配置文件
1. 拷贝已部署好的Node相关文件到新节点
在Master节点将Worker Node涉及文件拷贝到新节点172.16.10.22/23/24/25
vim scp-k8snode.sh
---
scp -r /opt/kubernetes root@172.16.10.22:/opt/
scp /opt/kubernetes/ssl/ca.pem root@172.16.10.22:/opt/kubernetes/ssl
scp -r /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@172.16.10.22:/usr/lib/systemd/system
scp -r /opt/kubernetes root@172.16.10.23:/opt/
scp /opt/kubernetes/ssl/ca.pem root@172.16.10.23:/opt/kubernetes/ssl
scp -r /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@172.16.10.23:/usr/lib/systemd/system
scp -r /opt/kubernetes root@172.16.10.24:/opt/
scp /opt/kubernetes/ssl/ca.pem root@172.16.10.24:/opt/kubernetes/ssl
scp -r /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@172.16.10.24:/usr/lib/systemd/system
scp -r /opt/kubernetes root@172.16.10.25:/opt/
scp /opt/kubernetes/ssl/ca.pem root@172.16.10.25:/opt/kubernetes/ssl
scp -r /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@172.16.10.25:/usr/lib/systemd/system
---
删除kubelet证书和kubeconfig文件 [主机：172.16.10.22/23/24/25]
rm -rf /opt/kubernetes/cfg/kubelet.kubeconfig
rm -rf /opt/kubernetes/ssl/kubelet*
rm -rf /opt/kubernetes/logs/*
注：这几个文件是证书申请审批后自动生成的，每个Node不同，必须删除
修改主机名 [改节点的主机名]
flyfish22:
vi /opt/kubernetes/cfg/kubelet.conf
--hostname-override=flyfish22
vi /opt/kubernetes/cfg/kube-proxy-config.yml
hostnameOverride: flyfish22
修改主机名 [改节点的主机名]
flyfish23:
vi /opt/kubernetes/cfg/kubelet.conf
--hostname-override=flyfish23
vi /opt/kubernetes/cfg/kube-proxy-config.yml
hostnameOverride: flyfish23
同理： flyfish24/flyfish25 一样的操作
启动并设置开机启动
systemctl daemon-reload
systemctl start kubelet kube-proxy
systemctl enable kubelet kube-proxy
在Master上批准新Node kubelet证书申请
kubectl get csr
# 授权请求
kubectl certificate approve node-csr-2o0ZsIptIDlDoSEUe8xQ3mV7s3-g0LgNMLmqM-JqXHg
kubectl certificate approve node-csr-6OV5vu73-b5qmq0_yYCpZVpt9evz9IkTcr6RAyAUL7g
kubectl certificate approve node-csr-dMi6lSUARNCeo2Oq_n5kptcmcZJZsiHLloNVSwLHgpA
kubectl certificate approve node-csr-n5kbGKPQEmBSMamQbLV9XevlSk3hbZvjKLCqQqhRw40
kubectl get node,pod -n kube-system
七：增加master节点
新增master节点flyfish22/flyfish23
部署master02 IP 地址：flyfish22 节点 172.16.10.22
在 flyfish22 部署与 flyfish21 一样的 服务
scp -r /root/TLS/ root@flyfish22:/root/
scp /usr/bin/kubectl root@172.16.10.22:/usr/bin/
scp /usr/lib/systemd/system/kube-* root@172.16.10.22:/usr/lib/systemd/system/
修改flyfish22的配置文件
cd /opt/kubernetes/cfg
vim kube-apiserver.conf
---
--bind-address=172.16.10.22
--advertise-address=192.16.10.22
部署master03 IP 地址：flyfish23 节点 172.16.10.23
在 flyfish23 部署与 flyfish21 一样的 服务
scp -r /root/TLS/ root@flyfish23:/root/
scp /usr/bin/kubectl root@172.16.10.23:/usr/bin/
scp /usr/lib/systemd/system/kube-* root@172.16.10.23:/usr/lib/systemd/system/
修改flyfish23的配置文件
cd /opt/kubernetes/cfg
vim kube-apiserver.conf
---
--bind-address=172.16.10.23
--advertise-address=192.16.10.23
新增两个master主机：flyfish22/flyfish23启动服务：
service kube-apiserver start
chkconfig kube-apiserver on
service kube-controller-manager start
chkconfig kube-controller-manager on
service kube-scheduler start
chkconfig kube-scheduler on
flyfish22:
生成kubeconfig 文件
cd /root/TLS/k8s
#生成kubeconfig文件：
mkdir /root/.kube
KUBE_CONFIG="/root/.kube/config"
KUBE_APISERVER="https://172.16.10.22:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials cluster-admin \
--client-certificate=./admin.pem \
--client-key=./admin-key.pem \
--embed-certs=true \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
--cluster=kubernetes \
--user=cluster-admin \
--kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}
flyfish23:
生成kubeconfig 文件
cd /root/TLS/k8s
#生成kubeconfig文件：
mkdir /root/.kube
KUBE_CONFIG="/root/.kube/config"
KUBE_APISERVER="https://172.16.10.23:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials cluster-admin \
--client-certificate=./admin.pem \
--client-key=./admin-key.pem \
--embed-certs=true \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
--cluster=kubernetes \
--user=cluster-admin \
--kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}
flyfish22/flyfish23 执行查看命令：
kubectl get cs
kubectl get node,pod -n kube-system
八：配置两台nginx+keepalived
nginx的负载均衡高可用
8.1 配置两台nginx
启用：flyfish26/flyfish27 两台机器安装nginx+keepived
选用flyfish26/flyfish27节点安装nginx
wget https://nginx.org/download/nginx-1.23.2.tar.gz
nginx的编译安装：
配置依赖包：
yum -y install gcc pcre pcre-devel zlib zlib-devel openssl openssl-devel
tar -zxvf nginx-1.23.2.tar.gz
cd nginx-1.23.2/
./configure \
--prefix=/usr/local/nginx \
--http-proxy-temp-path=/usr/local/nginx/proxy_temp \
--http-fastcgi-temp-path=/usr/local/nginx/fastcgi_temp \
--with-http_ssl_module \
--with-threads \
--with-file-aio \
--with-http_ssl_module \
--with-http_realip_module \
--with-http_gzip_static_module \
--with-http_secure_link_module \
--with-http_stub_status_module \
--with-http_auth_request_module \
--with-http_random_index_module \
--with-http_image_filter_module \
--with-stream
make && make install
flyfish26 主机：nginx 配置如下
cd /usr/local/nginx/conf
cp -p nginx.conf nginx.conf.bak
vim nginx.conf
增加：
---
stream {
log_format main "$remote_addr $upstream_addr $time_local $status";
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 172.16.10.21:6443;
server 172.16.10.22:6443;
server 172.16.10.23:6443;
}
server {
listen 172.16.10.26:6443;
proxy_pass k8s-apiserver;
}
}
mkdir -p /var/log/nginx/
cd ..
sbin/nginx -t
sbin/nginx
ps -ef |grep nginx
flyfish27 主机：nginx 配置如下
cd /usr/local/nginx/conf
cp -p nginx.conf nginx.conf.bak
vim nginx.conf
增加：
---
stream {
log_format main "$remote_addr $upstream_addr $time_local $status";
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 172.16.10.21:6443;
server 172.16.10.22:6443;
server 172.16.10.23:6443;
}
server {
listen 172.16.10.27:6443;
proxy_pass k8s-apiserver;
}
}
mkdir -p /var/log/nginx/
cd ..
sbin/nginx -t
sbin/nginx
ps -ef |grep nginx
8.2 配置keepalived 高可用
在flyfish26 与flyfish27 上面部署 nginx 与keepalive
yum install epel-release -y
yum install keepalived -y
# keepalived配置文件（Nginx Master flyfish26 主机）
cat > /etc/keepalived/keepalived.conf << EOF
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id NGINX_MASTER
}
vrrp_script check_nginx {
script "/etc/keepalived/check_nginx.sh"
}
vrrp_instance VI_1 {
state MASTER
interface ens160
virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
priority 100 # 优先级，备服务器设置 90
advert_int 1 # 指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
# 虚拟IP
virtual_ipaddress {
172.16.10.200/24
}
track_script {
check_nginx
}
}
EOF
注：
vrrp_script：指定检查nginx工作状态脚本（根据nginx状态判断是否故障转移）
virtual_ipaddress：虚拟IP（VIP）
检查nginx状态脚本：
cat > /etc/keepalived/check_nginx.sh << "EOF"
#!/bin/bash
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")
if [ "$count" -eq 0 ];then
exit 1
else
exit 0
fi
EOF
chmod +x /etc/keepalived/check_nginx.sh
# keepalived配置文件（Nginx Backup flyfish27 主机）
cat > /etc/keepalived/keepalived.conf << EOF
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id NGINX_BACKUP
}
vrrp_script check_nginx {
script "/etc/keepalived/check_nginx.sh"
}
vrrp_instance VI_1 {
state BACKUP
interface ens160
virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.10.200/24
}
track_script {
check_nginx
}
}
EOF
上述配置文件中检查nginx运行状态脚本：
cat > /etc/keepalived/check_nginx.sh << "EOF"
#!/bin/bash
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")
if [ "$count" -eq 0 ];then
exit 1
else
exit 0
fi
EOF
chmod +x /etc/keepalived/check_nginx.sh
注：keepalived根据脚本返回状态码（0为工作正常，非0不正常）判断是否故障转移。
启动并设置开机启动
systemctl daemon-reload
systemctl start keepalived
systemctl enable keepalived
ip addr
停掉flyfish26 主机 keepalived 查看虚拟机VIP 是否可以漂移到flyfish27 主机上面
flyfish26:
service keepalived stop
flyfish27；
ip addr show
启动flyfish26 主机上面keepalived 浮动VIP 回自动切回来
flyfish26:
service keepalived start
flyfish26；
ip addr show
8.3 修改nginx的负载地址
修改两台nginx 配置文件的负载IP地址
cd /usr/local/nginx/conf/
从新启动nginx
cd /usr/local/nginx/
sbin/nginx -s reload
8.4 修改所有Worker Node连接LB VIP
修改所有node 节点的 master 服务器指向
login : 172.16.10.21
cd /opt/kubernetes/cfg/
vim bootstrap.kubeconfig
---
server: https://172.16.10.24:6443 改成：
server: https://172.16.10.200:6443
---
vim kubelet.kubeconfig
----
server: https://172.16.10.84:6443 改成：
server: https://172.16.10.200:6443
----
vim kube-proxy.kubeconfig
----
server: https://172.16.10.84:6443 改成：
server: https://172.16.10.200:6443
----
scp bootstrap.kubeconfig kubelet.kubeconfig kube-proxy.kubeconfig root@flyfish22:/opt/kubernetes/cfg/
scp bootstrap.kubeconfig kubelet.kubeconfig kube-proxy.kubeconfig root@flyfish23:/opt/kubernetes/cfg/
scp bootstrap.kubeconfig kubelet.kubeconfig kube-proxy.kubeconfig root@flyfish24:/opt/kubernetes/cfg/
scp bootstrap.kubeconfig kubelet.kubeconfig kube-proxy.kubeconfig root@flyfish25:/opt/kubernetes/cfg/
重新启动 node 节点的 kubelet 和 kube-proxy
service kubelet restart
service kube-proxy restart
在flyfish21 / flyfish22 / flyfish23 主机上面验证
kubectl get node,pod -n kube-system
至此：k8s1.27.2 高可用集群部署完成
九：部署Dashboard和CoreDNS
9.1 部署Dashboard
github:
https://github.com/kubernetes/dashboard/releases/tag/v2.7.0
wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml
目前最新版本v2.7.0
vim recommended.yaml
----
spec:
ports:
- port: 443
targetPort: 8443
nodePort: 30001
type: NodePort
selector:
k8s-app: kubernetes-dashboard
----
kubectl apply -f recommended.yaml
kubectl get pods -n kubernetes-dashboard
kubectl get pods,svc -n kubernetes-dashboard
创建service account并绑定默认cluster-admin管理员集群角色：
vim dashadmin.yaml
-----
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin-user
namespace: kubernetes-dashboard
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: admin-user
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: admin-user
namespace: kubernetes-dashboard
-----
kubectl apply -f dashadmin.yaml
创建用户登录token
kubectl -n kubernetes-dashboard create token admin-user
----
eyJhbGciOiJSUzI1NiIsImtpZCI6ImkyWU9iU25NNHFWVy1NRlBSNGVqYkFvX01iYUtzOVhJRTlrcldxSzZ5U28ifQ.eyJhdWQiOlsiYXBpIiwiaHR0cHM6Ly9rdWJlcm5ldGVzLmRlZmF1bHQuc3ZjLmNsdXN0ZXIubG9jYWwiXSwiZXhwIjoxNjg2NjQ0MzY3LCJpYXQiOjE2ODY2NDA3NjcsImlzcyI6ImFwaSIsImt1YmVybmV0ZXMuaW8iOnsibmFtZXNwYWNlIjoia3ViZXJuZXRlcy1kYXNoYm9hcmQiLCJzZXJ2aWNlYWNjb3VudCI6eyJuYW1lIjoiYWRtaW4tdXNlciIsInVpZCI6ImJmOTY2ZjlkLWMxYzEtNDUxZi1iNjQyLTk0N2IzZDYyNWE4NSJ9fSwibmJmIjoxNjg2NjQwNzY3LCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZXJuZXRlcy1kYXNoYm9hcmQ6YWRtaW4tdXNlciJ9.urJd6dqD78VZ82I2-8YRdFojX1N98irZNOyyV6jex9pEsXJqaHhE3jcyerUl0F_2as8D6CJmlbkLx2TYWfbRNsPewler22mgAztG_Lb55-SF94WSsoSHBY77fb6GebduzzXs3CzeugZVM1zzxOGl3gnGwHYlOgW4REwtG2kxLTiLTDW8NViy6zPqW8JLXouwUFj4cVb2iHNq3fS5oZ5Ws3lwZfKPoInlih30JnvSH7N4-Q0TuVja2Li7ALG5vq4K4_pbOIJ8ilX5u8aP8tVfxnuOlT40MUiXf-msSbQqKLtAOG7tl1uyuHNZMoxdODcPZFaX0oSz6IYo608JMqDTkQ
----
打开web
https://172.16.10.21:30001
9.2 部署CoreDNS
kubectl apply -f coredns.yaml
测试:
kubectl run -it --rm dns-test --image=busybox:1.28.4 sh
创建一个nginx pod 测试：
kubectl create deployment nginx --image=nginx
kubectl expose deployment nginx --port=80 --type=NodePort
kubectl get deploy,svc,pod
9.3 配置metrics-server
github地址：
https://github.com/kubernetes-sigs/metrics-server/releases
下载：
https://github.com/kubernetes-sigs/metrics-server/releases/tag/v0.6.1
wget https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.6.1/components.yaml --no-check-certificate
kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.6.1/components.yaml
cat components.yaml |grep image
需要先下载镜像
k8s.gcr.io/metrics-server/metrics-server:v0.6.1
registry.aliyuncs.com/google_containers/metrics-server:v0.6.1
vim components.yaml
----
image: registry.aliyuncs.com/google_containers/metrics-server:v0.5.1
-----
vim components.yaml
---
spec:
containers:
- args:
- --cert-dir=/tmp
- --secure-port=4443
- --kubelet-preferred-address-types=InternalIP
- --kubelet-use-node-status-port
- --metric-resolution=15s
- --kubelet-insecure-tls
image: registry.aliyuncs.com/google_containers/metrics-server:v0.6.1
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
---
kubectl apply -f components.yaml
kubectl get pod -n kube-system
kubectl top node
kubectl top pod -n kube-system
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