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centos7 k8s 三节点 全二进制部署 1.23.15

时间：2023-07-29 20:11:39浏览次数：50  
标签：15 kubernetes -- ca centos7 etc etcd 1.23 pki

主机名 IP地址 Pod 网段 Service 网段
master 192.168.1.60 172.16.0.0/12 10.96.0.0/16
node01 192.168.1.70 172.16.0.0/12 10.96.0.0/16
node02 192.168.1.80 172.16.0.0/12 10.96.0.0/16 
[root@master ~]# cat /etc/redhat-release 
CentOS Linux release 7.9.2009 (Core)
[root@master ~]# uname -a
Linux master 4.19.12-1.el7.elrepo.x86_64 #1 SMP Fri Dec 21 11:06:36 EST 2018 x86_64 x86_64 x86_64 GNU/Linux

系统优化

配置hosts

# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.60 master
192.168.1.70 node01
192.168.1.80 node02

配置yum源

阿里云YUM仓库

mkdir /etc/yum.repos.d/bak
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/bak/
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo
yum clean all && yum makecache
yum -y install wget vim
wget -O /etc/yum.repos.d/epel.repo https://mirrors.aliyun.com/repo/epel-7.repo
yum clean all && yum makecache
yum install ipvsadm ipset sysstat conntrack libseccomp -y
yum update -y --exclude=kernel* && reboot #CentOS7需要升级，CentOS8可以按需升级系统

优化配置

systemctl disable --now firewalld 
systemctl disable --now dnsmasq
systemctl disable --now NetworkManager
systemctl disable --now postfix
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/sysconfig/selinux
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
swapoff -a && sysctl -w vm.swappiness=0
sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab
ulimit -SHn 65535
echo "
* soft nofile 65536
* hard nofile 131072
* soft nproc 65535
* hard nproc 655350
* soft memlock unlimited
* hard memlock unlimited　
" >>/etc/security/limits.conf

配置时间同步

rpm -ivh http://mirrors.wlnmp.com/centos/wlnmp-release-centos.noarch.rpm
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'Asia/Shanghai' >/etc/timezone
ntpdate time2.aliyun.com
echo "*/5 * * * * /usr/sbin/ntpdate time2.aliyun.com" >>/var/spool/cron/root
systemctl restart crond

升级内核

wget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpm
wget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm
yum localinstall -y kernel-ml*
grub2-set-default  0 && grub2-mkconfig -o /etc/grub2.cfg
grubby --args="user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)"
grubby --default-kernel
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack
echo "
ip_vs
ip_vs_lc
ip_vs_wlc
ip_vs_rr
ip_vs_wrr
ip_vs_lblc
ip_vs_lblcr
ip_vs_dh
ip_vs_sh
ip_vs_nq
ip_vs_sed
ip_vs_ftp
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
" >>/etc/modules-load.d/ipvs.conf 
systemctl enable --now systemd-modules-load.service

检查是否加载

lsmod | grep -e ip_vs -e nf_conntrack

cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
net.ipv4.conf.all.route_localnet = 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
EOF
sysctl --system

所有节点配置完内核后，重启服务器，保证重启后内核依旧加载

reboot
lsmod | grep --color=auto -e ip_vs -e nf_conntrack

部署K8s

下载软件包

https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.23.md
https://github.com/containerd/containerd/releases
https://github.com/etcd-io/etcd/releases/
https://github.com/kubernetes-sigs/cri-tools/releases

wget https://github.com/containerd/containerd/releases/download/v1.6.22/cri-containerd-cni-1.6.22-linux-amd64.tar.gz
wget https://dl.k8s.io/v1.23.15/kubernetes-server-linux-amd64.tar.gz
wget https://github.com/etcd-io/etcd/releases/download/v3.5.9/etcd-v3.5.9-linux-amd64.tar.gz
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.24.2/crictl-v1.24.2-linux-amd64.tar.gz

安装软件包

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}
tar -zxvf etcd-v3.5.9-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.5.9-linux-amd64/etcd{,ctl}
for i in $(ls /usr/local/bin/kube* | grep -E 'let|proxy'); do scp $i node01:$i; scp $i node02:$i done
mkdir -p /opt/cni/bin && mkdir -p /etc/kubernetes/pki /etc/etcd/ssl
ssh node01 -C "mkdir -p /opt/cni/bin && mkdir -p /etc/kubernetes/pki /etc/etcd/ssl"
ssh node02 -C "mkdir -p /opt/cni/bin && mkdir -p /etc/kubernetes/pki /etc/etcd/ssl"

生成证书

wget "https://pkg.cfssl.org/R1.2/cfssl_linux-amd64" -O /usr/local/bin/cfssl
wget "https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64" -O /usr/local/bin/cfssljson
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson

创建文件

mkdir pki && cd pki

admin-csr.json
-----------------------------------------------------
{
  "CN": "admin",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "system:masters",
      "OU": "Kubernetes-manual"
    }
  ]
}


apiserver-csr.json
-----------------------------------------------------
{
  "CN": "kube-apiserver",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "Kubernetes",
      "OU": "Kubernetes-manual"
    }
  ]
}


ca-config.json
-----------------------------------------------------
{
  "signing": {
    "default": {
      "expiry": "876000h"
    },
    "profiles": {
      "kubernetes": {
        "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ],
        "expiry": "876000h"
      }
    }
  }
}


ca-csr.json
-----------------------------------------------------
{
  "CN": "kubernetes",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "Kubernetes",
      "OU": "Kubernetes-manual"
    }
  ],
  "ca": {
    "expiry": "876000h"
  }
}


etcd-ca-csr.json
-----------------------------------------------------
{
  "CN": "etcd",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "etcd",
      "OU": "Etcd Security"
    }
  ],
  "ca": {
    "expiry": "876000h"
  }
}


etcd-csr.json
-----------------------------------------------------
{
  "CN": "etcd",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "etcd",
      "OU": "Etcd Security"
    }
  ]
}


front-proxy-ca-csr.json
-----------------------------------------------------
{
  "CN": "kubernetes",
  "key": {
     "algo": "rsa",
     "size": 2048
  },
  "ca": {
    "expiry": "876000h"
  }
}


front-proxy-client-csr.json
-----------------------------------------------------
{
  "CN": "front-proxy-client",
  "key": {
     "algo": "rsa",
     "size": 2048
  }
}


kubelet-csr.json
-----------------------------------------------------
{
  "CN": "system:node:$NODE",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "Beijing",
      "ST": "Beijing",
      "O": "system:nodes",
      "OU": "Kubernetes-manual"
    }
  ]
}


kube-proxy-csr.json
-----------------------------------------------------
{
  "CN": "system:kube-proxy",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "system:kube-proxy",
      "OU": "Kubernetes-manual"
    }
  ]
}


manager-csr.json
-----------------------------------------------------
{
  "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"
    }
  ]
}


scheduler-csr.json
-----------------------------------------------------
{
  "CN": "system:kube-scheduler",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Beijing",
      "L": "Beijing",
      "O": "system:kube-scheduler",
      "OU": "Kubernetes-manual"
    }
  ]
}

生成相关证书

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,master,192.168.1.60 \
    -profile=kubernetes \
    etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca
cfssl gencert   -ca=/etc/kubernetes/pki/ca.pem   -ca-key=/etc/kubernetes/pki/ca-key.pem   -config=ca-config.json   -hostname=10.96.0.1,192.168.1.60,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local   -profile=kubernetes   apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver
cfssl gencert   -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca
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-client
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
kubectl config set-cluster kubernetes \
      --certificate-authority=/etc/kubernetes/pki/ca.pem \
      --embed-certs=true \
      --server=https://192.168.1.60:6443 \
      --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
kubectl config set-context system:kube-controller-manager@kubernetes \
     --cluster=kubernetes \
     --user=system:kube-controller-manager \
     --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
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
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://192.168.1.60:6443 \
     --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://192.168.1.60:6443     --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.kubeconfig
openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub
kubectl config set-cluster kubernetes     --certificate-authority=/etc/kubernetes/pki/ca.pem     --embed-certs=true     --server=https://192.168.1.60:6443     --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-credentials tls-bootstrap-token-user     --token=c8ad9c.2e4d610cf3e7426e --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-context tls-bootstrap-token-user@kubernetes     --cluster=kubernetes     --user=tls-bootstrap-token-user     --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config use-context tls-bootstrap-token-user@kubernetes     --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig

master

vim /etc/etcd/etcd.config.yml
name: 'master'
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://192.168.1.60:2380'
listen-client-urls: 'https://192.168.1.60:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.1.60:2380'
advertise-client-urls: 'https://192.168.1.60:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'master=https://192.168.1.60:2380'
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

vim /usr/lib/systemd/system/etcd.service
[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

mkdir /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
systemctl daemon-reload
systemctl enable --now etcd

# 查看服务状态
etcdctl endpoint status --write-out=table
etcdctl endpoint health --write-out=table
etcdctl member list --write-out=table

https://blog.51cto.com/u_12212643/5746097

https://blog.51cto.com/flyfish225/5706901

https://github.com/kubernetes/kubernetes/issues/106403

https://blog.51cto.com/michaelkang/5580773

https://github.com/coredns/deployment/blob/master/kubernetes/CoreDNS-k8s_version.md

https://blog.csdn.net/weixin_42072280/article/details/129817210
https://www.tianjiaguo.com/2022/07/containerd启动容器报错/

https://blog.51cto.com/u_12386780/5084112
https://rpmfind.net/linux/rpm2html/search.php?query=libseccomp&submit=Search+...&system=&arch=

标签：15,kubernetes,--,ca,centos7,etc,etcd,1.23,pki
From： https://www.cnblogs.com/chuyiwang/p/17590393.html

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