Kubernetes全栈架构师（二进制高可用安装k8s集群部署篇）--学习笔记
Kubernetes全栈架构师（二进制高可用安装k8s集群部署篇）--学习笔记
目录
二进制高可用基本配置
二进制系统和内核升级
二进制基本组件安装
二进制生成证书详解
二进制高可用及etcd配置
二进制K8s组件配置
二进制使用Bootstrapping自动颁发证书
二进制Node节点及Calico配置
二进制高可用基本配置
k8s高可用架构解析，高可用Kubernetes集群规划，设置静态ip，请参考上一篇文章
配置所有节点hosts文件（发送键输到入所有会话）
vim /etc/hosts127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localhost.localdomain localhost6 localhost6.localdomain6192.168.232.128 k8s-master01192.168.232.129 k8s-master02192.168.232.130 k8s-master03192.168.232.236 k8s-master-lb # 如果不是高可用集群，该IP为Master01的IP192.168.232.131 k8s-node01192.168.232.132 k8s-node02
host节点主要是控制节点使用，控制节点下载一些文件，然后通过sskey传到其他的节点上面
CentOS 7安装yum源如下：
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repoyum install -y yum-utils device-mapper-persistent-data lvm2 yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.reposed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo
必备工具安装
yum install wget jq psmisc vim net-tools telnet yum-utils device-mapper-persistent-data lvm2 git -y
所有节点关闭firewalld 、dnsmasq、selinux(CentOS7需要关闭NetworkManager，CentOS8不需要)
systemctl disable --now firewalld systemctl disable --now dnsmasqsystemctl disable --now NetworkManagersetenforce 0sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/sysconfig/selinux sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
检查状态（必须为 Disable）
getenforce
所有节点关闭swap分区，fstab注释swap
swapoff -a && sysctl -w vm.swappiness=0sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab
所有节点同步时间
安装ntpdate
rpm -ivh http://mirrors.wlnmp.com/centos/wlnmp-release-centos.noarch.rpm yum install ntpdate -y
所有节点同步时间。时间同步配置如下：
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime echo 'Asia/Shanghai' >/etc/timezone ntpdate time2.aliyun.com
检查时间
date
加入到crontab
crontab -e# 添加以下内容*/5 * * * * /usr/sbin/ntpdate time2.aliyun.com
所有节点配置limit：
ulimit -SHn 65535 vim /etc/security/limits.conf# 末尾添加如下内容* soft nofile 655360* hard nofile 131072* soft nproc 655350* hard nproc 655350* soft memlock unlimited* hard memlock unlimited
Master01节点（取消发送键输到入所有会话）免密钥登录其他节点，安装过程中生成配置文件和证书均在Master01上操作，集群管理也在Master01上操作，阿里云或者AWS上需要单独一台kubectl服务器。密钥配置如下：
ssh-keygen -t rsa
Master01配置免密码登录其他节点
for i in k8s-master01 k8s-master02 k8s-master03 k8s-node01 k8s-node02;do ssh-copy-id -i .ssh/id_rsa.pub $i;done
所有节点安装基本工具（发送键输到入所有会话）
yum install wget jq psmisc vim net-tools yum-utils device-mapper-persistent-data lvm2 git -y
Master01下载安装文件（取消发送键输到入所有会话）
cd /root/ ; git clone https://github.com/dotbalo/k8s-ha-install.git
所有节点（发送键输到入所有会话）升级系统并重启，此处升级没有升级内核，下节会单独升级内核：
yum update -y --exclude=kernel* && reboot #CentOS7需要升级，CentOS8可以按需升级系统
二进制系统和内核升级
CentOS7 需要升级内核至4.18+，本地升级的版本为4.19
在master01节点（取消发送键输入到所有会话）下载内核：
cd /rootwget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpmwget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm
从master01节点传到其他节点：
for i in k8s-master02 k8s-master03 k8s-node01 k8s-node02;do scp kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpm $i:/root/ ; done
所有节点安装内核
cd /root && yum localinstall -y kernel-ml*
所有节点更改内核启动顺序
grub2-set-default 0 && grub2-mkconfig -o /etc/grub2.cfggrubby --args="user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)"
检查默认内核是不是4.19
grubby --default-kernel
所有节点重启，然后检查内核是不是4.19
rebootuname -a
所有节点安装ipvsadm（实现负载均衡）：
yum install ipvsadm ipset sysstat conntrack libseccomp -y
所有节点配置ipvs模块，在内核4.19+版本nf_conntrack_ipv4已经改为nf_conntrack， 4.18以下使用nf_conntrack_ipv4即可：
modprobe -- ip_vsmodprobe -- ip_vs_rrmodprobe -- ip_vs_wrrmodprobe -- ip_vs_shmodprobe -- nf_conntrackvim /etc/modules-load.d/ipvs.conf # 加入以下内容ip_vsip_vs_lcip_vs_wlcip_vs_rrip_vs_wrrip_vs_lblcip_vs_lblcrip_vs_dhip_vs_ship_vs_foip_vs_nqip_vs_sedip_vs_ftpip_vs_shnf_conntrackip_tablesip_setxt_setipt_setipt_rpfilteript_REJECTipip
然后执行
systemctl enable --now systemd-modules-load.service
检查是否加载（需要重启后才可以加载）：
lsmod | grep -e ip_vs -e nf_conntrack
开启一些k8s集群中必须的内核参数，所有节点配置k8s内核：
cat <<EOF > /etc/sysctl.d/k8s.confnet.ipv4.ip_forward = 1net.bridge.bridge-nf-call-iptables = 1net.bridge.bridge-nf-call-ip6tables = 1fs.may_detach_mounts = 1vm.overcommit_memory=1vm.panic_on_oom=0fs.inotify.max_user_watches=89100fs.file-max=52706963fs.nr_open=52706963net.netfilter.nf_conntrack_max=2310720net.ipv4.tcp_keepalive_time = 600net.ipv4.tcp_keepalive_probes = 3net.ipv4.tcp_keepalive_intvl =15net.ipv4.tcp_max_tw_buckets = 36000net.ipv4.tcp_tw_reuse = 1net.ipv4.tcp_max_orphans = 327680net.ipv4.tcp_orphan_retries = 3net.ipv4.tcp_syncookies = 1net.ipv4.tcp_max_syn_backlog = 16384net.ipv4.ip_conntrack_max = 65536net.ipv4.tcp_max_syn_backlog = 16384net.ipv4.tcp_timestamps = 0net.core.somaxconn = 16384EOFsysctl --system
net.ipv4.ip_forward 不打开的话跨主机通讯不了
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
二进制基本组件安装
Docker安装
K8s及etcd安装
Docker安装
所有节点安装Docker-ce 19.03（官方推荐）
yum install docker-ce-19.03.* -y
由于新版kubelet建议使用systemd，所以可以把docker的CgroupDriver改成systemd
mkdir /etc/docker
cat > /etc/docker/daemon.json <<EOF
{ "exec-opts": ["native.cgroupdriver=systemd"]
}
EOF所有节点设置开机自启动Docker：
systemctl daemon-reload && systemctl enable --now docker
K8s及etcd安装
Master01（取消发送键输入到所有的会话）下载kubernetes安装包
访问官网获取最新版本：https://github.com/kubernetes/kubernetes
进入CHANGELOG目录，可以看到目前最新的是1.22，点击Server Binaries获取下载链接，如果有更新的版本需要下载最新的版本
wget https://dl.k8s.io/v1.22.0-beta.1/kubernetes-server-linux-amd64.tar.gz
如果下载不了可以通过本地下载再上传到服务器
下载etcd安装包（3.4.13是官方推荐版本，已经经过验证）
wget https://github.com/etcd-io/etcd/releases/download/v3.4.13/etcd-v3.4.13-linux-amd64.tar.gz
二进制的安装其实解压之后就安装完成了
解压kubernetes安装文件
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 -zxvf etcd-v3.4.13-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.4.13-linux-amd64/etcd{,ctl}版本查看
kubelet --versionetcdctl version
将组件发送到其他节点
MasterNodes='k8s-master02 k8s-master03'WorkNodes='k8s-node01 k8s-node02'for NODE in $MasterNodes; 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/; donefor NODE in $WorkNodes; do scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin/ ; done所有节点创建/opt/cni/bin目录（发送键输入到所有的会话）
mkdir -p /opt/cni/bin
查看分支
cd k8s-ha-install/git branch -a
Master01切换到1.20.x分支（其他版本可以切换到其他分支）（取消发送键输入到所有的会话）
git checkout manual-installation-v1.20.x
二进制生成证书详解
etcd证书
k8s组件证书
二进制安装最关键步骤，一步错误全盘皆输，一定要注意每个步骤都要是正确的
Master01下载生成证书工具
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/cfssljsonchmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson
etcd证书
所有Master节点创建etcd证书目录（发送键输入到所有的会话，取消node节点）
mkdir /etc/etcd/ssl -p
所有节点创建kubernetes相关目录（发送键输入到所有的会话）
mkdir -p /etc/kubernetes/pki
Master01节点生成etcd证书（取消发送键输入到所有的会话）
生成证书的CSR文件：证书签名请求文件，配置了一些域名、公司、单位
# 这个目录有我们生成证书需要用到的csr文件cd /root/k8s-ha-install/pki# 生成etcd CA证书和CA证书的keycfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
查看生成的key
ls /etc/etcd/ssl/
颁发证书
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-master03,192.168.232.128,192.168.232.129,192.168.232.130 \ -profile=kubernetes \ etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
查看生成证书
ls /etc/etcd/ssl/
生成内容
etcd-ca.csr etcd-ca-key.pem etcd-ca.pem etcd.csr etcd-key.pem etcd.pem
将证书复制到其他节点
MasterNodes='k8s-master02 k8s-master03'WorkNodes='k8s-node01 k8s-node02'for NODE in $MasterNodes; 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
donek8s组件证书
Master01生成kubernetes证书
cd /root/k8s-ha-install/pkicfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca
查看生成的key
ls /etc/kubernetes/pki
生成apiserver的客户端证书
10.96.0.是k8s service的网段，如果说需要更改k8s service网段，那就需要更改10.96.0.1，如果不是高可用集群，192.168.232.236为Master01的IP
cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -hostname=10.96.0.1,192.168.232.236,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,192.168.232.128,192.168.232.129,192.168.232.130 -profile=kubernetes apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver
查看生成的证书
ls /etc/kubernetes/pki
生成apiserver的聚合证书。Requestheader-client-xxx requestheader-allowwd-xxx:aggerator
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
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# 注意，如果不是高可用集群，192.168.232.236:8443改为master01的地址，8443改为apiserver的端口，默认是6443# set-cluster：设置一个集群项kubectl config set-cluster kubernetes \ --certificate-authority=/etc/kubernetes/pki/ca.pem \ --embed-certs=true \ --server=https://192.168.232.236:8443 \ --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig# set-credentials 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# 使用某个环境当做默认环境kubectl config use-context system:kube-controller-manager@kubernetes \ --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
生成 scheduler 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 \ scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler# 注意，如果不是高可用集群，192.168.232.236:8443改为master01的地址，8443改为apiserver的端口，默认是6443kubectl config set-cluster kubernetes \ --certificate-authority=/etc/kubernetes/pki/ca.pem \ --embed-certs=true \ --server=https://192.168.232.236:8443 \ --kubeconfig=/etc/kubernetes/scheduler.kubeconfigkubectl 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.kubeconfigkubectl config set-context system:kube-scheduler@kubernetes \ --cluster=kubernetes \ --user=system:kube-scheduler \ --kubeconfig=/etc/kubernetes/scheduler.kubeconfigkubectl config use-context system:kube-scheduler@kubernetes \ --kubeconfig=/etc/kubernetes/scheduler.kubeconfig
生成admin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 \ admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin# 注意，如果不是高可用集群，192.168.232.236:8443改为master01的地址，8443改为apiserver的端口，默认是6443kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.232.236:8443 --kubeconfig=/etc/kubernetes/admin.kubeconfigkubectl 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.kubeconfigkubectl config set-context kubernetes-admin@kubernetes --cluster=kubernetes --user=kubernetes-admin --kubeconfig=/etc/kubernetes/admin.kubeconfigkubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig
我们用同样的命令生成了 admin.kubeconfig，scheduler.kubeconfig，controller-manager.kubeconfig，它们之间是如何区分的？
查看 admin-csr.json
cat admin-csr.json{ "CN": "admin", # 域名
"key": { "algo": "rsa", "size": 2048
}, "names": [
{ "C": "CN", "ST": "Beijing", "L": "Beijing", "O": "system:masters", # 部门，相当于admin是属于哪个组的
"OU": "Kubernetes-manual"
}
]
}我们生成的证书会定义一个用户 admin，它是属于 system:masters 这个组，k8s 安装的时候会有一个 clusterrole，它是一个集群角色，相当于一个配置，它有着集群最高的管理权限，同时会创建一个 clusterrolebinding，它会把 admin 绑到 system:masters 这个组上，然后这个组上的所有用户都会有这个集群的权限
创建ServiceAccount Key -> secret
openssl genrsa -out /etc/kubernetes/pki/sa.key 2048openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub
ServiceAccount 是 k8s 一种认证方式，创建 ServiceAccount 的时候会创建一个与之绑定的 secret，这个 secret 会生成一个 token
发送证书至其他节点
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;done查看证书文件（一共23个文件）
ls /etc/kubernetes/pki/ls /etc/kubernetes/pki/ |wc -l
查看证书过期时间（expiry 过期时间100年）
cat ca-config.json{ "signing": { "default": { "expiry": "876000h"
}, "profiles": { "kubernetes": { "usages": [ "signing", "key encipherment", "server auth", "client auth"
], "expiry": "876000h"
}
}
}
}二进制高可用及etcd配置
Etcd配置
高可用配置
Etcd配置
etcd生产环境中一定要启动奇数个节点，不然容易产生脑裂
etcd配置大致相同，注意修改每个Master节点的etcd配置的主机名和IP地址
注意三个节点的配置是不同的
Master01
vim /etc/etcd/etcd.config.ymlname: 'k8s-master01'data-dir: /var/lib/etcdwal-dir: /var/lib/etcd/walsnapshot-count: 5000heartbeat-interval: 100election-timeout: 1000quota-backend-bytes: 0listen-peer-urls: 'https://192.168.232.128:2380'listen-client-urls: 'https://192.168.232.128:2379,http://127.0.0.1:2379'max-snapshots: 3max-wals: 5cors:initial-advertise-peer-urls: 'https://192.168.232.128:2380'advertise-client-urls: 'https://192.168.232.128:2379'discovery:discovery-fallback: 'proxy'discovery-proxy:discovery-srv:initial-cluster: 'k8s-master01=https://192.168.232.128:2380,k8s-master02=https://192.168.232.129:2380,k8s-master03=https://192.168.232.130:2380'initial-cluster-token: 'etcd-k8s-cluster'initial-cluster-state: 'new'strict-reconfig-check: falseenable-v2: trueenable-pprof: trueproxy: 'off'proxy-failure-wait: 5000proxy-refresh-interval: 30000proxy-dial-timeout: 1000proxy-write-timeout: 5000proxy-read-timeout: 0client-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: truepeer-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: truedebug: falselog-package-levels:log-outputs: [default]force-new-cluster: false
Master02
vim /etc/etcd/etcd.config.ymlname: 'k8s-master02'data-dir: /var/lib/etcdwal-dir: /var/lib/etcd/walsnapshot-count: 5000heartbeat-interval: 100election-timeout: 1000quota-backend-bytes: 0listen-peer-urls: 'https://192.168.232.129:2380'listen-client-urls: 'https://192.168.232.129:2379,http://127.0.0.1:2379'max-snapshots: 3max-wals: 5cors:initial-advertise-peer-urls: 'https://192.168.232.129:2380'advertise-client-urls: 'https://192.168.232.129:2379'discovery:discovery-fallback: 'proxy'discovery-proxy:discovery-srv:initial-cluster: 'k8s-master01=https://192.168.232.128:2380,k8s-master02=https://192.168.232.129:2380,k8s-master03=https://192.168.232.130:2380'initial-cluster-token: 'etcd-k8s-cluster'initial-cluster-state: 'new'strict-reconfig-check: falseenable-v2: trueenable-pprof: trueproxy: 'off'proxy-failure-wait: 5000proxy-refresh-interval: 30000proxy-dial-timeout: 1000proxy-write-timeout: 5000proxy-read-timeout: 0client-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: truepeer-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: truedebug: falselog-package-levels:log-outputs: [default]force-new-cluster: false
Master03
vim /etc/etcd/etcd.config.ymlname: 'k8s-master03'data-dir: /var/lib/etcdwal-dir: /var/lib/etcd/walsnapshot-count: 5000heartbeat-interval: 100election-timeout: 1000quota-backend-bytes: 0listen-peer-urls: 'https://192.168.232.130:2380'listen-client-urls: 'https://192.168.232.130:2379,http://127.0.0.1:2379'max-snapshots: 3max-wals: 5cors:initial-advertise-peer-urls: 'https://192.168.232.130:2380'advertise-client-urls: 'https://192.168.232.130:2379'discovery:discovery-fallback: 'proxy'discovery-proxy:discovery-srv:initial-cluster: 'k8s-master01=https://192.168.232.128:2380,k8s-master02=https://192.168.232.129:2380,k8s-master03=https://192.168.232.130:2380'initial-cluster-token: 'etcd-k8s-cluster'initial-cluster-state: 'new'strict-reconfig-check: falseenable-v2: trueenable-pprof: trueproxy: 'off'proxy-failure-wait: 5000proxy-refresh-interval: 30000proxy-dial-timeout: 1000proxy-write-timeout: 5000proxy-read-timeout: 0client-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: truepeer-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: truedebug: falselog-package-levels:log-outputs: [default]force-new-cluster: false
所有Master节点创建etcd service并启动（发送键输入到所有的会话，取消node节点）
vim /usr/lib/systemd/system/etcd.service[Unit]Description=Etcd ServiceDocumentation=https://coreos.com/etcd/docs/latest/After=network.target[Service]Type=notifyExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.ymlRestart=on-failureRestartSec=10LimitNOFILE=65536[Install]WantedBy=multi-user.targetAlias=etcd3.service
所有Master节点创建etcd的证书目录
mkdir /etc/kubernetes/pki/etcdln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/systemctl daemon-reloadsystemctl enable --now etcd
查看etcd状态
export ETCDCTL_API=3etcdctl --endpoints="192.168.232.130:2379,192.168.232.129:2379,192.168.232.128:2379" --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
状态
+----------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +----------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | 192.168.232.130:2379 | 8fa642cec63e074b | 3.4.13 | 20 kB | false | false | 2 | 8 | 8 | || 192.168.232.129:2379 | b23932e50da8a0ea | 3.4.13 | 25 kB | false | false | 2 | 8 | 8 | | | 192.168.232.128:2379 | d79600c132f4ccdb | 3.4.13 | 20 kB | true | false | 2 | 8 | 8 | |+----------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
高可用配置
高可用配置（注意：如果不是高可用集群，haproxy和keepalived无需安装）
如果在云上安装也无需执行此章节的步骤，可以直接使用云上的lb，比如阿里云slb，腾讯云elb等
公有云要用公有云自带的负载均衡，比如阿里云的SLB，腾讯云的ELB，用来替代haproxy和keepalived，因为公有云大部分都是不支持keepalived的，另外如果用阿里云的话，kubectl控制端不能放在master节点，推荐使用腾讯云，因为阿里云的slb有回环的问题，也就是slb代理的服务器不能反向访问SLB，但是腾讯云修复了这个问题。
Slb -> haproxy -> apiserver
所有Master节点安装keepalived和haproxy
yum install keepalived haproxy -y
所有Master配置HAProxy，配置一样（删除默认配置 ggdG 回车）
vim /etc/haproxy/haproxy.cfg global maxconn 2000 ulimit-n 16384 log 127.0.0.1 local0 err stats timeout 30sdefaults log global mode http option httplog timeout connect 5000 timeout client 50000 timeout server 50000 timeout http-request 15s timeout http-keep-alive 15sfrontend 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-masterbackend 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 192.168.232.128:6443 check server k8s-master02 192.168.232.129:6443 check server k8s-master03 192.168.232.130:6443 check
keepalived
所有Master节点配置KeepAlived，配置不一样，注意区分
注意每个节点的IP和网卡（interface参数），查看网卡（ens33）并修改配置文件
ip a
如果公司有其他 keepalived ，注意 virtual_router_id 51 不能重复，它是一个广播
Master01 keepalived（删除默认配置 ggdG 回车）
vim /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_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 ens33
mcast_src_ip 192.168.232.128
virtual_router_id 51
priority 101
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.232.236
}
track_script {
chk_apiserver } }Master02 keepalived（删除默认配置 ggdG 回车）
vim /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_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 ens33
mcast_src_ip 192.168.232.129
virtual_router_id 51
priority 100
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.232.236
}
track_script {
chk_apiserver } }Master03 keepalived（删除默认配置 ggdG 回车）
vim /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_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 ens33
mcast_src_ip 192.168.232.130
virtual_router_id 51
priority 100
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.232.236
}
track_script {
chk_apiserver } }所有master节点健康检查配置（发送键输入到所有的会话，取消node节点）
vim /etc/keepalived/check_apiserver.sh#!/bin/basherr=0for 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 fidoneif [[ $err != "0" ]]; then echo "systemctl stop keepalived" /usr/bin/systemctl stop keepalived exit 1else exit 0fi
chmod +x /etc/keepalived/check_apiserver.sh
所有master节点启动haproxy和keepalived
systemctl daemon-reloadsystemctl enable --now haproxysystemctl enable --now keepalived
它会有一个选主的过程，然后绑定，这就是 VIP 的作用，它会在三个主节点之间选择一个进行绑定，当这个节点出现问题的时候，VIP 会绑定到其他节点
查看 192.168.232.236 绑定情况
ip a
VIP测试
ping 192.168.232.236
重要：如果安装了keepalived和haproxy，需要测试keepalived是否是正常的
telnet 192.168.232.236 8443
如果ping不通且telnet没有出现 ]，则认为VIP不可以，不可在继续往下执行，需要排查keepalived的问题，比如防火墙和selinux，haproxy和keepalived的状态，监听端口等
所有节点查看防火墙状态必须为disable和inactive
systemctl status firewalld
所有节点查看selinux状态，必须为disable：getenforce
master节点查看haproxy和keepalived状态：
systemctl status keepalived haproxy
master节点查看监听端口：
netstat -lntp
二进制K8s组件配置
Apiserver
ControllerManager
Scheduler
所有节点创建相关目录（发送键输入到所有的会话）
mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes
Apiserver
所有Master节点创建kube-apiserver service，# 注意，如果不是高可用集群，192.168.232.236改为master01的地址
Master01配置（取消发送键输入到所有的会话）
注意k8s service网段为10.96.0.0/12，该网段不能和宿主机的网段、Pod网段的重复，请按需修改
vim /usr/lib/systemd/system/kube-apiserver.service[Unit]Description=Kubernetes API ServerDocumentation=https://github.com/kubernetes/kubernetesAfter=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 \ --insecure-port=0 \ --advertise-address=192.168.232.128 \ --service-cluster-ip-range=10.96.0.0/12 \ --service-node-port-range=30000-32767 \ --etcd-servers=https://192.168.232.128:2379,https://192.168.232.129:2379,https://192.168.232.130:2379 \ --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 # --token-auth-file=/etc/kubernetes/token.csvRestart=on-failureRestartSec=10sLimitNOFILE=65535[Install]WantedBy=multi-user.target
Master02配置
注意k8s service网段为10.96.0.0/12，该网段不能和宿主机的网段、Pod网段的重复，请按需修改
vim /usr/lib/systemd/system/kube-apiserver.service[Unit]Description=Kubernetes API ServerDocumentation=https://github.com/kubernetes/kubernetesAfter=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 \ --insecure-port=0 \ --advertise-address=192.168.232.129 \ --service-cluster-ip-range=10.96.0.0/12 \ --service-node-port-range=30000-32767 \ --etcd-servers=https://192.168.232.128:2379,https://192.168.232.129:2379,https://192.168.232.130:2379 \ --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 # --token-auth-file=/etc/kubernetes/token.csvRestart=on-failureRestartSec=10sLimitNOFILE=65535[Install]WantedBy=multi-user.target
Master03配置
注意k8s service网段为10.96.0.0/12，该网段不能和宿主机的网段、Pod网段的重复，请按需修改
vim /usr/lib/systemd/system/kube-apiserver.service[Unit]Description=Kubernetes API ServerDocumentation=https://github.com/kubernetes/kubernetesAfter=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 \ --insecure-port=0 \ --advertise-address=192.168.232.130 \ --service-cluster-ip-range=10.96.0.0/12 \ --service-node-port-range=30000-32767 \ --etcd-servers=https://192.168.232.128:2379,https://192.168.232.129:2379,https://192.168.232.130:2379 \ --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 # --token-auth-file=/etc/kubernetes/token.csvRestart=on-failureRestartSec=10sLimitNOFILE=65535[Install]WantedBy=multi-user.target
所有Master节点开启kube-apiserver（发送键输入到所有的会话，取消node节点）
systemctl daemon-reload && systemctl enable --now kube-apiserver
检测kube-server状态
systemctl status kube-apiserver
ControllerManager
所有Master节点配置kube-controller-manager service
注意k8s Pod网段为172.16.0.0/12，该网段不能和宿主机的网段、k8s Service网段的重复，请按需修改
vim /usr/lib/systemd/system/kube-controller-manager.service[Unit]Description=Kubernetes Controller ManagerDocumentation=https://github.com/kubernetes/kubernetesAfter=network.target[Service]ExecStart=/usr/local/bin/kube-controller-manager \ --v=2 \ --logtostderr=true \ --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 \ --cluster-cidr=172.16.0.0/12 \ --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \ --node-cidr-mask-size=24 Restart=alwaysRestartSec=10s[Install]WantedBy=multi-user.target
所有Master节点启动kube-controller-manager
systemctl daemon-reloadsystemctl enable --now kube-controller-manager
查看启动状态
systemctl status kube-controller-manager
Scheduler
所有Master节点配置kube-scheduler service
vim /usr/lib/systemd/system/kube-scheduler.service [Unit]Description=Kubernetes SchedulerDocumentation=https://github.com/kubernetes/kubernetesAfter=network.target[Service]ExecStart=/usr/local/bin/kube-scheduler \ --v=2 \ --logtostderr=true \ --address=127.0.0.1 \ --leader-elect=true \ --kubeconfig=/etc/kubernetes/scheduler.kubeconfigRestart=alwaysRestartSec=10s[Install]WantedBy=multi-user.target
启动
systemctl daemon-reloadsystemctl enable --now kube-scheduler
查看启动状态
systemctl status kube-scheduler
二进制使用Bootstrapping自动颁发证书
它可以给 node 节点自动颁发证书，也就是给 keepalived 颁发证书
为什么这个证书不是手动管理？因为 k8s 主节点可能是固定的，创建好之后一直就是那几台，但是 node 节点可能变化比较多，如果添加，删除，故障维护节点的时候手动添加会比较麻烦，keepalived 证书和主机名是有绑定的，而我们的主机名又是不一样的，所以需要有一种机制自动颁发 keepalived 发来的证书请求
在Master01创建bootstrap（取消发送键输入到所有的会话）
注意，如果不是高可用集群，192.168.232.236:8443改为master01的地址，8443改为apiserver的端口，默认是6443
cd /root/k8s-ha-install/bootstrap kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.232.236:8443 --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfigkubectl config set-credentials tls-bootstrap-token-user --token=c8ad9c.2e4d610cf3e7426e --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfigkubectl config set-context tls-bootstrap-token-user@kubernetes --cluster=kubernetes --user=tls-bootstrap-token-user --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfigkubectl config use-context tls-bootstrap-token-user@kubernetes --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
bootstrap-kubelet.kubeconfig 是一个 keepalived 用来向 apiserver 申请证书的文件
注意：如果要修改bootstrap.secret.yaml的token-id和token-secret，需要保证 c8ad9c 字符串一致的，并且位数是一样的。还要保证上个命令的黄色字体：c8ad9c.2e4d610cf3e7426e与你修改的字符串要一致
cat bootstrap.secret.yamlapiVersion: v1kind: Secretmetadata: name: bootstrap-token-c8ad9c namespace: kube-systemtype: bootstrap.kubernetes.io/tokenstringData: 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
创建配置文件，缺乏此文件无法执行 kubectl get node（The connection to the server localhost:8080 was refused），需要将证书复制过来
mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config
kubectl 命令只需要一个节点拥有就可以，这是控制节点，不可以让每个节点都拥有，这样非常危险，可以把他放到集群之外的任何一个节点都可以，并不一定是我们的 k8s 节点，任何一台服务器与 k8s 相通即可，需要把这个文件复制过去，就可以访问到我们这个集群
创建 bootstrap
kubectl create -f bootstrap.secret.yaml
二进制Node节点及Calico配置
二进制Node节点
复制证书
Kubelet配置
kube-proxy配置
复制证书
node节点使用自动颁发证书的形式配置
Master01节点复制证书至Node节点（取消发送键输入到所有的会话）
cd /etc/kubernetes/for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do
ssh $NODE mkdir -p /etc/kubernetes/pki /etc/etcd/ssl /etc/etcd/ssl for FILE in etcd-ca.pem etcd.pem etcd-key.pem; do
scp /etc/etcd/ssl/$FILE $NODE:/etc/etcd/ssl/
done for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig; do
scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}
done
doneKubelet配置
所有节点创建相关目录（发送键输入到所有的会话）
mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/
所有节点配置kubelet service
vim /usr/lib/systemd/system/kubelet.service# 添加以下内容[Unit]Description=Kubernetes KubeletDocumentation=https://github.com/kubernetes/kubernetesAfter=docker.serviceRequires=docker.service[Service]ExecStart=/usr/local/bin/kubeletRestart=alwaysStartLimitInterval=0RestartSec=10[Install]WantedBy=multi-user.target
所有节点配置kubelet service的配置文件
vim /etc/systemd/system/kubelet.service.d/10-kubelet.conf# 添加以下内容[Service] Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"Environment="KUBELET_SYSTEM_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.2"Environment="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node='' "ExecStart= ExecStart=/usr/local/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_SYSTEM_ARGS $KUBELET_EXTRA_ARGS
创建kubelet的配置文件
注意：如果更改了k8s的service网段，需要更改kubelet-conf.yml 的clusterDNS:配置，改成k8s Service网段的第十个地址，比如10.96.0.10
vim /etc/kubernetes/kubelet-conf.yml# 添加以下内容apiVersion: kubelet.config.k8s.io/v1beta1kind: KubeletConfigurationaddress: 0.0.0.0port: 10250readOnlyPort: 10255authentication: anonymous: enabled: false webhook: cacheTTL: 2m0s enabled: true x509: clientCAFile: /etc/kubernetes/pki/ca.pemauthorization: mode: Webhook webhook: cacheAuthorizedTTL: 5m0s cacheUnauthorizedTTL: 30scgroupDriver: systemdcgroupsPerQOS: trueclusterDNS:- 10.96.0.10clusterDomain: cluster.localcontainerLogMaxFiles: 5containerLogMaxSize: 10MicontentType: application/vnd.kubernetes.protobufcpuCFSQuota: truecpuManagerPolicy: nonecpuManagerReconcilePeriod: 10senableControllerAttachDetach: trueenableDebuggingHandlers: trueenforceNodeAllocatable:- podseventBurst: 10eventRecordQPS: 5evictionHard: imagefs.available: 15% memory.available: 100Mi nodefs.available: 10% nodefs.inodesFree: 5%evictionPressureTransitionPeriod: 5m0sfailSwapOn: truefileCheckFrequency: 20shairpinMode: promiscuous-bridgehealthzBindAddress: 127.0.0.1healthzPort: 10248httpCheckFrequency: 20simageGCHighThresholdPercent: 85imageGCLowThresholdPercent: 80imageMinimumGCAge: 2m0siptablesDropBit: 15iptablesMasqueradeBit: 14kubeAPIBurst: 10kubeAPIQPS: 5makeIPTablesUtilChains: truemaxOpenFiles: 1000000maxPods: 110nodeStatusUpdateFrequency: 10soomScoreAdj: -999podPidsLimit: -1registryBurst: 10registryPullQPS: 5resolvConf: /etc/resolv.confrotateCertificates: trueruntimeRequestTimeout: 2m0sserializeImagePulls: truestaticPodPath: /etc/kubernetes/manifestsstreamingConnectionIdleTimeout: 4h0m0ssyncFrequency: 1m0svolumeStatsAggPeriod: 1m0s
启动所有节点kubelet
systemctl daemon-reloadsystemctl enable --now kubelet
查看系统日志
tail -f /var/log/messages
显示只有如下信息为正常，因为Calico还没安装
Unable to update cni config" err="no networks found in /etc/cni/net.d
查看集群状态
kubectl get node
集群状态NotReady，因为Calico还没安装
NAME STATUS ROLES AGE VERSIONk8s-master01 NotReady <none> 2m23s v1.22.0-beta.1k8s-master02 NotReady <none> 2m16s v1.22.0-beta.1k8s-master03 NotReady <none> 2m16s v1.22.0-beta.1k8s-node01 NotReady <none> 2m16s v1.22.0-beta.1k8s-node02 NotReady <none> 2m16s v1.22.0-beta.1
kube-proxy配置
注意，如果不是高可用集群，192.168.232.236:8443改为master01的地址，8443改为apiserver的端口，默认是6443
在Master01执行（取消发送键输入到所有的会话）
cd /root/k8s-ha-installkubectl -n kube-system create serviceaccount kube-proxy
kubectl create clusterrolebinding system:kube-proxy --clusterrole system:node-proxier --serviceaccount kube-system:kube-proxySECRET=$(kubectl -n kube-system get sa/kube-proxy \ --output=jsonpath='{.secrets[0].name}')JWT_TOKEN=$(kubectl -n kube-system get secret/$SECRET \--output=jsonpath='{.data.token}' | base64 -d)PKI_DIR=/etc/kubernetes/pki
K8S_DIR=/etc/kubernetes
kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.232.236:8443 --kubeconfig=${K8S_DIR}/kube-proxy.kubeconfigkubectl config set-credentials kubernetes --token=${JWT_TOKEN} --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfigkubectl config set-context kubernetes --cluster=kubernetes --user=kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfigkubectl config use-context kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig在master01将kube-proxy的systemd Service文件发送到其他节点
如果更改了集群Pod的网段，需要更改kube-proxy/kube-proxy.conf的clusterCIDR: 172.16.0.0/12参数为pod的网段。
for NODE in k8s-master01 k8s-master02 k8s-master03; do
scp ${K8S_DIR}/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
scp kube-proxy/kube-proxy.conf $NODE:/etc/kubernetes/kube-proxy.conf
scp kube-proxy/kube-proxy.service $NODE:/usr/lib/systemd/system/kube-proxy.service
donefor NODE in k8s-node01 k8s-node02; do
scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
scp kube-proxy/kube-proxy.conf $NODE:/etc/kubernetes/kube-proxy.conf
scp kube-proxy/kube-proxy.service $NODE:/usr/lib/systemd/system/kube-proxy.service
done所有节点启动kube-proxy（发送键输入到所有的会话）
systemctl daemon-reloadsystemctl enable --now kube-proxy
查看状态
systemctl status kube-proxy
Calico配置
在master01执行（取消发送键输入到所有的会话）
cd /root/k8s-ha-install/calico/# 修改calico-etcd.yaml的以下位置sed -i 's#etcd_endpoints: "http://<ETCD_IP>:<ETCD_PORT>"#etcd_endpoints: "https://192.168.232.128:2379,https://192.168.232.129:2379,https://192.168.232.130:2379"#g' calico-etcd.yaml
ETCD_CA=`cat /etc/kubernetes/pki/etcd/etcd-ca.pem | base64 | tr -d '\n'`
ETCD_CERT=`cat /etc/kubernetes/pki/etcd/etcd.pem | base64 | tr -d '\n'`
ETCD_KEY=`cat /etc/kubernetes/pki/etcd/etcd-key.pem | base64 | tr -d '\n'`
sed -i "s@# etcd-key: null@etcd-key: ${ETCD_KEY}@g; s@# etcd-cert: null@etcd-cert: ${ETCD_CERT}@g; s@# etcd-ca: null@etcd-ca: ${ETCD_CA}@g" calico-etcd.yaml
sed -i 's#etcd_ca: ""#etcd_ca: "/calico-secrets/etcd-ca"#g; s#etcd_cert: ""#etcd_cert: "/calico-secrets/etcd-cert"#g; s#etcd_key: "" #etcd_key: "/calico-secrets/etcd-key" #g' calico-etcd.yaml# 更改此处为自己的pod网段POD_SUBNET="172.16.0.0/12"# 注意下面的这个步骤是把calico-etcd.yaml文件里面的CALICO_IPV4POOL_CIDR下的网段改成自己的Pod网段，也就是把192.168.x.x/16改成自己的集群网段，并打开注释：sed -i 's@# - name: CALICO_IPV4POOL_CIDR@- name: CALICO_IPV4POOL_CIDR@g; s@# value: "192.168.0.0/16"@ value: '"${POD_SUBNET}"'@g' calico-etcd.yaml
kubectl apply -f calico-etcd.yaml查看容器状态
kubectl get po -n kube-system
容器状态
NAME READY STATUS RESTARTS AGEcalico-kube-controllers-cdd5755b9-4fzg9 1/1 Running 0 113scalico-node-8xg62 1/1 Running 0 113scalico-node-dczxz 1/1 Running 0 113scalico-node-gn8ws 1/1 Running 0 113scalico-node-qmwkd 1/1 Running 0 113scalico-node-zfw8n 1/1 Running 2 (78s ago) 113s
如果容器状态异常可以使用kubectl describe 或者logs查看容器的日志
来源https://www.cnblogs.com/MingsonZheng/p/15028406.html