在Ubuntu上安装Kubernetes (k8s) v1.24.1的二进制文件，支持IPv4和IPv6双栈
最编程
2024-08-10 20:35:05
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二进制安装Kubernetes（k8s） v1.24.1 IPv4/IPv6双栈 --- Ubuntu版本
Kubernetes 开源不易，帮忙点个star，谢谢了????
介绍
kubernetes二进制安装
后续尽可能第一时间更新新版本文档，更新后内容在GitHub。
本文是使用的是Ubuntu作为基底，其他文档请在GitHub上查看。
1.23.3 和 1.23.4 和 1.23.5 和 1.23.6 和 1.24.0 和1.24.1 文档以及安装包已生成。
我使用IPV6的目的是在公网进行访问，所以我配置了IPV6静态地址。
若您没有IPV6环境，或者不想使用IPv6，不对主机进行配置IPv6地址即可。
不配置IPV6，不影响后续，不过集群依旧是支持IPv6的。为后期留有扩展可能性。
https://github.com/cby-chen/Kubernetes/
手动项目地址：https://github.com/cby-chen/Kubernetes
脚本项目地址：https://github.com/cby-chen/Binary_installation_of_Kubernetes
kubernetes 1.24 变化较大，详细见：https://kubernetes.io/zh/blog/2022/04/07/upcoming-changes-in-kubernetes-1-24/
1.环境
| 主机名称 | IP地址 | 说明 | 软件 |
|---|---|---|---|
| Master01 | 192.168.1.11 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived |
| Master02 | 192.168.1.12 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived |
| Master03 | 192.168.1.13 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived |
| Node01 | 192.168.1.14 | node节点 | kubelet、kube-proxy、nfs-client |
| Node02 | 192.168.1.15 | node节点 | kubelet、kube-proxy、nfs-client |
| 192.168.1.19 | VIP |
| 软件 | 版本 |
|---|---|
| kernel | 5.4.0-86 |
| Ubuntu | 2004 及以上 |
| kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy | v1.24.1 |
| etcd | v3.5.4 |
| containerd | v1.5.11 |
| cfssl | v1.6.1 |
| cni | v1.1.1 |
| crictl | v1.24.2 |
| haproxy | v1.8.27 |
| keepalived | v2.1.5 |
网段
物理主机：10.0.0.0/24
service：10.96.0.0/12
pod：172.16.0.0/12
建议k8s集群与etcd集群分开安装
安装包已经整理好：https://github.com/cby-chen/Kubernetes/releases/download/v1.24.1/kubernetes-v1.24.1.tar
1.1.k8s基础系统环境配置
1.2.配置IP
root@hello:~# vim /etc/netplan/00-installer-config.yaml
root@hello:~#
root@hello:~# cat /etc/netplan/00-installer-config.yaml
# This is the network config written by 'subiquity'
network:
ethernets:
ens18:
addresses:
- 192.168.1.11/24
gateway4: 192.168.1.1
nameservers:
addresses: [8.8.8.8]
version: 2
root@hello:~#
root@hello:~# netplan apply
root@hello:~#
1.3.设置主机名
hostnamectl set-hostname k8s-master01
hostnamectl set-hostname k8s-master02
hostnamectl set-hostname k8s-master03
hostnamectl set-hostname k8s-node01
hostnamectl set-hostname k8s-node021.4.配置apt源
sudo sed -i 's/archive.ubuntu.com/mirrors.ustc.edu.cn/g' /etc/apt/sources.list1.5.安装一些必备工具
apt install wget jq psmisc vim net-tools nfs-kernel-server telnet lvm2 git tar curl -y1.6.选择性下载需要工具
1.下载kubernetes1.24.+的二进制包
github二进制包下载地址：https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.24.md
wget https://dl.k8s.io/v1.24.1/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/v3.5.4/etcd-v3.5.4-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-20.10.14.tgz
4.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/v1.6.4/cri-containerd-cni-1.6.4-linux-amd64.tar.gz
5.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
6.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
7.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.gz1.7.关闭防火墙
systemctl disable --now ufw1.8.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 01.9.进行时间同步 (lb除外)
# 服务端
apt install chrony -y
cat > /etc/chrony/chrony.conf << EOF
pool ntp.aliyun.com iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
allow 192.168.1.0/24
local stratum 10
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOF
systemctl restart chronyd
systemctl enable chronyd
# 客户端
apt install chrony -y
vim /etc/chrony/chrony.conf
cat /etc/chrony/chrony.conf | grep -v "^#" | grep -v "^$"
pool 192.168.1.11 iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
systemctl restart chronyd ; systemctl enable chronyd
# 客户端安装一条命令
yum install chrony -y ; sed -i "s#2.centos.pool.ntp.org#192.168.1.11#g" /etc/chrony/chrony.conf ; systemctl restart chronyd ; systemctl enable chronyd
#使用客户端进行验证
chronyc sources -v1.10.配置ulimit
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
EOF1.11.配置免密登录
apt install -y sshpass
ssh-keygen -f /root/.ssh/id_rsa -P ''
export IP="192.168.1.11 192.168.1.12 192.168.1.13 192.168.1.14 192.168.1.15"
export SSHPASS=123123
for HOST in $IP;do
sshpass -e ssh-copy-id -o StrictHostKeyChecking=no $HOST
done1.12.安装ipvsadm (lb除外)
apt install ipvsadm ipset sysstat conntrack -y
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 155648 6 ip_vs_rr,ip_vs_sh,ip_vs_wrr
nf_conntrack 139264 1 ip_vs
nf_defrag_ipv6 24576 2 nf_conntrack,ip_vs
nf_defrag_ipv4 16384 1 nf_conntrack
libcrc32c 16384 4 nf_conntrack,btrfs,raid456,ip_vs1.13.修改内核参数 (lb除外)
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
fs.may_detach_mounts = 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.ip_conntrack_max = 65536
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 = 0
EOF
sysctl --system1.14.所有节点配置hosts本地解析
cat > /etc/hosts <<EOF
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.11 k8s-master01
192.168.1.12 k8s-master02
192.168.1.13 k8s-master03
192.168.1.14 k8s-node01
192.168.1.15 k8s-node02
192.168.1.19 lb-vip
EOF2.k8s基本组件安装
2.1.所有k8s节点安装Containerd作为Runtime
wget https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz
#创建cni插件所需目录
mkdir -p /etc/cni/net.d /opt/cni/bin
#解压cni二进制包
tar xf cni-plugins-linux-amd64-v1.1.1.tgz -C /opt/cni/bin/
wget https://github.com/containerd/containerd/releases/download/v1.6.4/cri-containerd-cni-1.6.4-linux-amd64.tar.gz
#解压
tar -C / -xzf cri-containerd-cni-1.6.4-linux-amd64.tar.gz
#创建服务启动文件
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/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF2.1.1配置Containerd所需的模块
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF2.1.2加载模块
systemctl restart systemd-modules-load.service2.1.3配置Containerd所需的内核
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
# 加载内核
sysctl --system2.1.4创建Containerd的配置文件
mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml
修改Containerd的配置文件
sed -i "s#SystemdCgroup\ \=\ false#SystemdCgroup\ \=\ true#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep SystemdCgroup
sed -i "s#k8s.gcr.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep sandbox_image
# 找到containerd.runtimes.runc.options，在其下加入SystemdCgroup = true
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
SystemdCgroup = true
[plugins."io.containerd.grpc.v1.cri".cni]
# 将sandbox_image默认地址改为符合版本地址
sandbox_image = "registry.cn-hangzhou.aliyuncs.com/chenby/pause:3.6"2.1.5启动并设置为开机启动
systemctl daemon-reload
systemctl enable --now containerd2.1.6配置crictl客户端连接的运行时位置
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.24.2/crictl-v1.24.2-linux-amd64.tar.gz
#解压
tar xf crictl-v1.24.2-linux-amd64.tar.gz -C /usr/bin/
#生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
#测试
systemctl restart containerd
crictl info
2.2.k8s与etcd下载及安装（仅在master01操作）
2.2.1解压k8s安装包
# 下载安装包
wget https://dl.k8s.io/v1.24.1/kubernetes-server-linux-amd64.tar.gz
wget https://github.com/etcd-io/etcd/releases/download/v3.5.4/etcd-v3.5.4-linux-amd64.tar.gz
# 解压k8s安装文件
cd cby
tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}
# 解压etcd安装文件
tar -xf etcd-v3.5.4-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.5.4-linux-amd64/etcd{,ctl}
# 查看/usr/local/bin下内容
ls /usr/local/bin/
etcd etcdctl kube-apiserver kube-controller-manager kubectl kubelet kube-proxy kube-scheduler
2.2.2查看版本
[root@k8s-master01 ~]# kubelet --version
Kubernetes v1.24.1
[root@k8s-master01 ~]# etcdctl version
etcdctl version: 3.5.4
API version: 3.5
[root@k8s-master01 ~]# 2.2.3将组件发送至其他k8s节点
Master='k8s-master02 k8s-master03'
Work='k8s-node01 k8s-node02'
for NODE in $Master; do echo $NODE; scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $NODE:/usr/local/bin/; scp /usr/local/bin/etcd* $NODE:/usr/local/bin/; done
for NODE in $Work; do scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin/ ; done
mkdir -p /opt/cni/bin2.3创建证书相关文件
mkdir pki
cd pki
cat > admin-csr.json << EOF
{
"CN": "admin",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:masters",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > ca-config.json << EOF
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
EOF
cat > etcd-ca-csr.json << EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
cat > front-proxy-ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"ca": {
"expiry": "876000h"
}
}
EOF
cat > kubelet-csr.json << EOF
{
"CN": "system:node:\$NODE",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "system:nodes",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > manager-csr.json << EOF
{
"CN": "system:kube-controller-manager",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-controller-manager",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > apiserver-csr.json << EOF
{
"CN": "kube-apiserver",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
cat > etcd-csr.json << EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
EOF
cat > front-proxy-client-csr.json << EOF
{
"CN": "front-proxy-client",
"key": {
"algo": "rsa",
"size": 2048
}
}
EOF
cat > kube-proxy-csr.json << EOF
{
"CN": "system:kube-proxy",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-proxy",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > scheduler-csr.json << EOF
{
"CN": "system:kube-scheduler",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-scheduler",
"OU": "Kubernetes-manual"
}
]
}
EOF
cd ..
mkdir bootstrap
cd bootstrap
cat > bootstrap.secret.yaml << EOF
apiVersion: v1
kind: Secret
metadata:
name: bootstrap-token-c8ad9c
namespace: kube-system
type: bootstrap.kubernetes.io/token
stringData:
description: "The default bootstrap token generated by 'kubelet '."
token-id: c8ad9c
token-secret: 2e4d610cf3e7426e
usage-bootstrap-authentication: "true"
usage-bootstrap-signing: "true"
auth-extra-groups: system:bootstrappers:default-node-token,system:bootstrappers:worker,system:bootstrappers:ingress
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: kubelet-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:node-bootstrapper
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-certificate-rotation
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:selfnodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:nodes
---
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
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: kube-apiserver
EOF
cd ..
mkdir coredns
cd coredns
cat > coredns.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
name: coredns
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:coredns
rules:
- apiGroups:
- ""
resources:
- endpoints
- services
- pods
- namespaces
verbs:
- list
- watch
- apiGroups:
- discovery.k8s.io
resources:
- endpointslices
verbs:
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:coredns
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:coredns
subjects:
- kind: ServiceAccount
name: coredns
namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns
namespace: kube-system
data:
Corefile: |
.:53 {
errors
health {
lameduck 5s
}
ready
kubernetes cluster.local in-addr.arpa ip6.arpa {
fallthrough in-addr.arpa ip6.arpa
}
prometheus :9153
forward . /etc/resolv.conf {
max_concurrent 1000
}
cache 30
loop
reload
loadbalance
}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: kube-dns
kubernetes.io/name: "CoreDNS"
spec:
# replicas: not specified here:
# 1. Default is 1.
# 2. Will be tuned in real time if DNS horizontal auto-scaling is turned on.
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
selector:
matchLabels:
k8s-app: kube-dns
template:
metadata:
labels:
k8s-app: kube-dns
spec:
priorityClassName: system-cluster-critical
serviceAccountName: coredns
tolerations:
- key: "CriticalAddonsOnly"
operator: "Exists"
nodeSelector:
kubernetes.io/os: linux
affinity:
podAntiAffinity:
preferredDuringSchedulingIgnoredDuringExecution:
- weight: 100
podAffinityTerm:
labelSelector:
matchExpressions:
- key: k8s-app
operator: In
values: ["kube-dns"]
topologyKey: kubernetes.io/hostname
containers:
- name: coredns
image: registry.cn-beijing.aliyuncs.com/dotbalo/coredns:1.8.6
imagePullPolicy: IfNotPresent
resources:
limits:
memory: 170Mi
requests:
cpu: 100m
memory: 70Mi
args: [ "-conf", "/etc/coredns/Corefile" ]
volumeMounts:
- name: config-volume
mountPath: /etc/coredns
readOnly: true
ports:
- containerPort: 53
name: dns
protocol: UDP
- containerPort: 53
name: dns-tcp
protocol: TCP
- containerPort: 9153
name: metrics
protocol: TCP
securityContext:
allowPrivilegeEscalation: false
capabilities:
add:
- NET_BIND_SERVICE
drop:
- all
readOnlyRootFilesystem: true
livenessProbe:
httpGet:
path: /health
port: 8080
scheme: HTTP
initialDelaySeconds: 60
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 5
readinessProbe:
httpGet:
path: /ready
port: 8181
scheme: HTTP
dnsPolicy: Default
volumes:
- name: config-volume
configMap:
name: coredns
items:
- key: Corefile
path: Corefile
---
apiVersion: v1
kind: Service
metadata:
name: kube-dns
namespace: kube-system
annotations:
prometheus.io/port: "9153"
prometheus.io/scrape: "true"
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
kubernetes.io/name: "CoreDNS"
spec:
selector:
k8s-app: kube-dns
clusterIP: 10.96.0.10
ports:
- name: dns
port: 53
protocol: UDP
- name: dns-tcp
port: 53
protocol: TCP
- name: metrics
port: 9153
protocol: TCP
EOF
cd ..
mkdir metrics-server
cd metrics-server
cat > metrics-server.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
rbac.authorization.k8s.io/aggregate-to-admin: "true"
rbac.authorization.k8s.io/aggregate-to-edit: "true"
rbac.authorization.k8s.io/aggregate-to-view: "true"
name: system:aggregated-metrics-reader
rules:
- apiGroups:
- metrics.k8s.io
resources:
- pods
- nodes
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
rules:
- apiGroups:
- ""
resources:
- pods
- nodes
- nodes/stats
- namespaces
- configmaps
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server-auth-reader
namespace: kube-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server:system:auth-delegator
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:auth-delegator
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:metrics-server
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
ports:
- name: https
port: 443
protocol: TCP
targetPort: https
selector:
k8s-app: metrics-server
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
selector:
matchLabels:
k8s-app: metrics-server
strategy:
rollingUpdate:
maxUnavailable: 0
template:
metadata:
labels:
k8s-app: metrics-server
spec:
containers:
- args:
- --cert-dir=/tmp
- --secure-port=4443
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
- --metric-resolution=15s
- --kubelet-insecure-tls
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem # change to front-proxy-ca.crt for kubeadm
- --requestheader-username-headers=X-Remote-User
- --requestheader-group-headers=X-Remote-Group
- --requestheader-extra-headers-prefix=X-Remote-Extra-
image: registry.cn-beijing.aliyuncs.com/dotbalo/metrics-server:0.5.0
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
httpGet:
path: /livez
port: https
scheme: HTTPS
periodSeconds: 10
name: metrics-server
ports:
- containerPort: 4443
name: https
protocol: TCP
readinessProbe:
failureThreshold: 3
httpGet:
path: /readyz
port: https
scheme: HTTPS
initialDelaySeconds: 20
periodSeconds: 10
resources:
requests:
cpu: 100m
memory: 200Mi
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
volumeMounts:
- mountPath: /tmp
name: tmp-dir
- name: ca-ssl
mountPath: /etc/kubernetes/pki
nodeSelector:
kubernetes.io/os: linux
priorityClassName: system-cluster-critical
serviceAccountName: metrics-server
volumes:
- emptyDir: {}
name: tmp-dir
- name: ca-ssl
hostPath:
path: /etc/kubernetes/pki
---
apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
labels:
k8s-app: metrics-server
name: v1beta1.metrics.k8s.io
spec:
group: metrics.k8s.io
groupPriorityMinimum: 100
insecureSkipTLSVerify: true
service:
name: metrics-server
namespace: kube-system
version: v1beta1
versionPriority: 100
EOF3.相关证书生成
master01节点下载证书生成工具
wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64" -O /usr/local/bin/cfssl
wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64" -O /usr/local/bin/cfssljson
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson3.1.生成etcd证书
特别说明除外，以下操作在所有master节点操作
3.1.1所有master节点创建证书存放目录
mkdir /etc/etcd/ssl -p3.1.2master01节点生成etcd证书
cd pki
# 生成etcd证书和etcd证书的key（如果你觉得以后可能会扩容，可以在ip那多写几个预留出来）
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
cfssl gencert \
-ca=/etc/etcd/ssl/etcd-ca.pem \
-ca-key=/etc/etcd/ssl/etcd-ca-key.pem \
-config=ca-config.json \
-hostname=127.0.0.1,k8s-master01,k8s-master02,k8s-master03,192.168.1.11,192.168.1.12,192.168.1.13,2408:8207:78ca:9fa1::10,2408:8207:78ca:9fa1::20,2408:8207:78ca:9fa1::30 \
-profile=kubernetes \
etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd3.1.3将证书复制到其他节点
Master='k8s-master02 k8s-master03'
for NODE in $Master; do ssh $NODE "mkdir -p /etc/etcd/ssl"; for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do scp /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}; done; done3.2.生成k8s相关证书
特别说明除外，以下操作在所有master节点操作
3.2.1所有k8s节点创建证书存放目录
mkdir -p /etc/kubernetes/pki3.2.2master01节点生成k8s证书
# 生成一个根证书 ，多写了一些IP作为预留IP，为将来添加node做准备
cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca
# 10.96.0.1是service网段的第一个地址，需要计算，192.168.1.19为高可用vip地址
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-hostname=10.96.0.1,192.168.1.19,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,x.oiox.cn,k.oiox.cn,l.oiox.cn,o.oiox.cn,192.168.1.11,192.168.1.12,192.168.1.13,192.168.1.14,192.168.1.15,192.168.1.16,192.168.1.17,192.168.1.18,2408:8207:78ca:9fa1::10,2408:8207:78ca:9fa1::20,2408:8207:78ca:9fa1::30,2408:8207:78ca:9fa1::40,2408:8207:78ca:9fa1::50,2408:8207:78ca:9fa1::60,2408:8207:78ca:9fa1::70,2408:8207:78ca:9fa1::80,2408:8207:78ca:9fa1::90,2408:8207:78ca:9fa1::100 \
-profile=kubernetes apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver3.2.3生成apiserver聚合证书
cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca
# 有一个警告，可以忽略
cfssl gencert \
-ca=/etc/kubernetes/pki/front-proxy-ca.pem \
-ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem \
-config=ca-config.json \
-profile=kubernetes front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client3.2.4生成controller-manage的证书
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
manager-csr.json | cfssljson -bare /etc/kubernetes/pki/controller-manager
# 设置一个集群项
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.1.19:8443 \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个环境项，一个上下文
kubectl config set-context system:kube-controller-manager@kubernetes \
--cluster=kubernetes \
--user=system:kube-controller-manager \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个用户项
kubectl config set-credentials system:kube-controller-manager \
--client-certificate=/etc/kubernetes/pki/controller-manager.pem \
--client-key=/etc/kubernetes/pki/controller-manager-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置默认环境
kubectl config use-context system:kube-controller-manager@kubernetes \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.1.19:8443 \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-credentials system:kube-scheduler \
--client-certificate=/etc/kubernetes/pki/scheduler.pem \
--client-key=/etc/kubernetes/pki/scheduler-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-context system:kube-scheduler@kubernetes \
--cluster=kubernetes \
--user=system:kube-scheduler \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config use-context system:kube-scheduler@kubernetes \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.1.19:8443 \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-credentials kubernetes-admin \
--client-certificate=/etc/kubernetes/pki/admin.pem \
--client-key=/etc/kubernetes/pki/admin-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-context kubernetes-admin@kubernetes \
--cluster=kubernetes \
--user=kubernetes-admin \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig3.2.5创建kube-proxy证书
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
kube-proxy-csr.json | cfssljson -bare /etc/kubernetes/pki/kube-proxy
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.1.19:8443 \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
--client-certificate=/etc/kubernetes/pki/kube-proxy.pem \
--client-key=/etc/kubernetes/pki/kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-context kube-proxy@kubernetes \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config use-context kube-proxy@kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig3.2.5创建ServiceAccount Key ——secret
openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub3.2.6将证书发送到其他master节点
#其他节点创建目录
# mkdir /etc/kubernetes/pki/ -p
for NODE in k8s-master02 k8s-master03; do for FILE in $(ls /etc/kubernetes/pki | grep -v etcd); do scp /etc/kubernetes/pki/${FILE} $NODE:/etc/kubernetes/pki/${FILE}; done; for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do scp /etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE}; done; done3.2.7查看证书
ls /etc/kubernetes/pki/
admin.csr ca.csr front-proxy-ca.csr kube-proxy.csr scheduler-key.pem
admin-key.pem ca-key.pem front-proxy-ca-key.pem kube-proxy-key.pem scheduler.pem
admin.pem ca.pem front-proxy-ca.pem kube-proxy.pem
apiserver.csr controller-manager.csr front-proxy-client.csr sa.key
apiserver-key.pem controller-manager-key.pem front-proxy-client-key.pem sa.pub
apiserver.pem controller-manager.pem front-proxy-client.pem scheduler.csr
# 一共26个就对了
ls /etc/kubernetes/pki/ |wc -l
264.k8s系统组件配置
4.1.etcd配置
4.1.1master01配置
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master01'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.1.11:2380'
listen-client-urls: 'https://192.168.1.11:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.1.11:2380'
advertise-client-urls: 'https://192.168.1.11:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.1.11:2380,k8s-master02=https://192.168.1.12:2380,k8s-master03=https://192.168.1.13:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF4.1.2master02配置
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master02'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.1.12:2380'
listen-client-urls: 'https://192.168.1.12:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.1.12:2380'
advertise-client-urls: 'https://192.168.1.12:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.1.11:2380,k8s-master02=https://192.168.1.12:2380,k8s-master03=https://192.168.1.13:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF4.1.3master03配置
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master03'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.1.13:2380'
listen-client-urls: 'https://192.168.1.13:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.1.13:2380'
advertise-client-urls: 'https://192.168.1.13:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.1.11:2380,k8s-master02=https://192.168.1.12:2380,k8s-master03=https://192.168.1.13:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF4.2.创建service（所有master节点操作）
4.2.1创建etcd.service并启动
cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target
[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
Alias=etcd3.service
EOF4.2.2创建etcd证书目录
mkdir /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
systemctl daemon-reload
systemctl enable --now etcd4.2.3查看etcd状态
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
export ETCDCTL_API=3
etcdctl --endpoints="192.168.1.13:2379,192.168.1.12:2379,192.168.1.11:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
+----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 192.168.1.13:2379 | c0c8142615b9523f | 3.5.4 | 20 kB | false | false | 2 | 9 | 9 | |
| 192.168.1.12:2379 | de8396604d2c160d | 3.5.4 | 20 kB | false | false | 2 | 9 | 9 | |
| 192.168.1.11:2379 | 33c9d6df0037ab97 | 3.5.4 | 20 kB | true | false | 2 | 9 | 9 | |
+----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
[root@k8s-master01 pki]# 5.高可用配置
5.1在master三台服务器上操作
5.1.1安装keepalived和haproxy服务
apt -y install keepalived haproxy5.1.2修改haproxy配置文件（配置文件一样）
# cp /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.bak
cat >/etc/haproxy/haproxy.cfg<<"EOF"
global
maxconn 2000
ulimit-n 16384
log 127.0.0.1 local0 err
stats timeout 30s
defaults
log global
mode http
option httplog
timeout connect 5000
timeout client 50000
timeout server 50000
timeout http-request 15s
timeout http-keep-alive 15s
frontend monitor-in
bind *:33305
mode http
option httplog
monitor-uri /monitor
frontend k8s-master
bind 0.0.0.0:8443
bind 127.0.0.1:8443
mode tcp
option tcplog
tcp-request inspect-delay 5s
default_backend k8s-master
backend k8s-master
mode tcp
option tcplog
option tcp-check
balance roundrobin
default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
server k8s-master01 192.168.1.11:6443 check
server k8s-master02 192.168.1.12:6443 check
server k8s-master03 192.168.1.13:6443 check
EOF5.1.3M1配置keepalived master节点
#cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state MASTER
interface ens18
mcast_src_ip 192.168.1.11
virtual_router_id 51
priority 100
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.1.19
}
track_script {
chk_apiserver
} }
EOF5.1.4M2配置keepalived backup节点
# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
interface ens18
mcast_src_ip 192.168.1.12
virtual_router_id 51
priority 50
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.1.19
}
track_script {
chk_apiserver
} }
EOF
5.1.5M3配置keepalived backup节点
# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
interface ens18
mcast_src_ip 192.168.1.13
virtual_router_id 51
priority 50
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.1.19
}
track_script {
chk_apiserver
} }
EOF5.1.5健康检查脚本配置（所有master主机）
cat > /etc/keepalived/check_apiserver.sh << EOF
#!/bin/bash
err=0
for k in \$(seq 1 3)
do
check_code=\$(pgrep haproxy)
if [[ \$check_code == "" ]]; then
err=\$(expr \$err + 1)
sleep 1
continue
else
err=0
break
fi
done
if [[ \$err != "0" ]]; then
echo "systemctl stop keepalived"
/usr/bin/systemctl stop keepalived
exit 1
else
exit 0
fi
EOF
# 给脚本授权
chmod +x /etc/keepalived/check_apiserver.sh5.1.6启动服务
systemctl daemon-reload
systemctl enable --now haproxy
systemctl enable --now keepalived5.1.7测试高可用
# 能ping同
[root@k8s-node02 ~]# ping 192.168.1.19
# 能telnet访问
[root@k8s-node02 ~]# telnet 192.168.1.19 8443
# 关闭主节点，看vip是否漂移到备节点6.k8s组件配置（区别于第4点）
所有k8s节点创建以下目录
mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes6.1.创建apiserver（所有master节点）
6.1.1master01节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \
--v=2 \
--logtostderr=true \
--allow-privileged=true \
--bind-address=0.0.0.0 \
--secure-port=6443 \
--advertise-address=192.168.1.11 \
--service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
--feature-gates=IPv6DualStack=true \
--service-node-port-range=30000-32767 \
--etcd-servers=https://192.168.1.11:2379,https://192.168.1.12:2379,https://192.168.1.13:2379 \
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
--etcd-certfile=/etc/etcd/ssl/etcd.pem \
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
--client-ca-file=/etc/kubernetes/pki/ca.pem \
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
--service-account-key-file=/etc/kubernetes/pki/sa.pub \
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
--service-account-issuer=https://kubernetes.default.svc.cluster.local \
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \
--enable-bootstrap-token-auth=true \
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
--requestheader-allowed-names=aggregator \
--requestheader-group-headers=X-Remote-Group \
--requestheader-extra-headers-prefix=X-Remote-Extra- \
--requestheader-username-headers=X-Remote-User \
--enable-aggregator-routing=true
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF6.1.2master02节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \
--v=2 \
--logtostderr=true \
--allow-privileged=true \
--bind-address=0.0.0.0 \
--secure-port=6443 \
--advertise-address=192.168.1.12 \
--service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
--feature-gates=IPv6DualStack=true \
--service-node-port-range=30000-32767 \
--etcd-servers=https://192.168.1.11:2379,https://192.168.1.12:2379,https://192.168.1.13:2379 \
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
--etcd-certfile=/etc/etcd/ssl/etcd.pem \
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
--client-ca-file=/etc/kubernetes/pki/ca.pem \
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
--service-account-key-file=/etc/kubernetes/pki/sa.pub \
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
--service-account-issuer=https://kubernetes.default.svc.cluster.local \
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \
--enable-bootstrap-token-auth=true \
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
--requestheader-allowed-names=aggregator \
--requestheader-group-headers=X-Remote-Group \
--requestheader-extra-headers-prefix=X-Remote-Extra- \
--requestheader-username-headers=X-Remote-User \
--enable-aggregator-routing=true
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF6.1.3master03节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \
--v=2 \
--logtostderr=true \
--allow-privileged=true \
--bind-address=0.0.0.0 \
--secure-port=6443 \
--advertise-address=192.168.1.13 \
--service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
--feature-gates=IPv6DualStack=true \
--service-node-port-range=30000-32767 \
--etcd-servers=https://192.168.1.11:2379,https://192.168.1.12:2379,https://192.168.1.13:2379 \
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
--etcd-certfile=/etc/etcd/ssl/etcd.pem \
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
--client-ca-file=/etc/kubernetes/pki/ca.pem \
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
--service-account-key-file=/etc/kubernetes/pki/sa.pub \
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
--service-account-issuer=https://kubernetes.default.svc.cluster.local \
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \
--enable-bootstrap-token-auth=true \
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
--requestheader-allowed-names=aggregator \
--requestheader-group-headers=X-Remote-Group \
--requestheader-extra-headers-prefix=X-Remote-Extra- \
--requestheader-username-headers=X-Remote-User \
--enable-aggregator-routing=true
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF6.1.4启动apiserver（所有master节点）
systemctl daemon-reload && systemctl enable --now kube-apiserver
# 注意查看状态是否启动正常
systemctl status kube-apiserver6.2.配置kube-controller-manager service
# 所有master节点配置，且配置相同
# 172.16.0.0/12为pod网段，按需求设置你自己的网段
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-controller-manager \
--v=2 \
--logtostderr=true \
--bind-address=127.0.0.1 \
--root-ca-file=/etc/kubernetes/pki/ca.pem \
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \
--service-account-private-key-file=/etc/kubernetes/pki/sa.key \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \
--leader-elect=true \
--use-service-account-credentials=true \
--node-monitor-grace-period=40s \
--node-monitor-period=5s \
--pod-eviction-timeout=2m0s \
--controllers=*,bootstrapsigner,tokencleaner \
--allocate-node-cidrs=true \
--feature-gates=IPv6DualStack=true \
--service-cluster-ip-range=10.96.0.0/12,fd00::/108 \
--cluster-cidr=172.16.0.0/12,fc00::/48 \
--node-cidr-mask-size-ipv4=24 \
--node-cidr-mask-size-ipv6=64 \
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF6.2.1启动kube-controller-manager，并查看状态
systemctl daemon-reload
systemctl enable --now kube-controller-manager
systemctl status kube-controller-manager6.3.配置kube-scheduler service
6.3.1所有master节点配置，且配置相同
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-scheduler \
--v=2 \
--logtostderr=true \
--bind-address=127.0.0.1 \
--leader-elect=true \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF6.3.2启动并查看服务状态
systemctl daemon-reload
systemctl enable --now kube-scheduler
systemctl status kube-scheduler7.TLS Bootstrapping配置
7.1在master01上配置
cd bootstrap
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true --server=https://192.168.1.19:8443 \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-credentials tls-bootstrap-token-user \
--token=c8ad9c.2e4 上一篇： lvs启动脚本