本文采用的是etcd、master、HA混合部署方式，当然也可以把etcd cluster独立出来部署也是可以
k8s高可用拓扑图 (1).png
本文中k8s高可用主要体现在对master节点组件及etcd存储的高可用，文中使用到的服务器ip及角色对应如下：
一、环境准备
CentOS Linux release 7.7.1908 (Core) 3.10.0-1062.el7.x86_64
kubeadm-1.22.3-0.x86_64
kubelet-1.22.3-0.x86_64
kubectl-1.22.3-0.x86_64
kubernetes-cni-0.8.7-0.x86_64
| 主机名 | IP | VIP |
| k8s-master01 | 192.168.30.106 | 192.168.30.115 |
| k8s-master02 | 192.168.30.107 |
| k8s-master03 | 192.168.30.108 |
| k8s-node01 | 192.168.30.109 |
| k8s-node02 | 192.168.30.110 |
二、安装Docker
1、各节点下载docker源
cd /etc/yum.repos.d/
wget https://download.docker.com/linux/centos/docker-ce.repo
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2、各节点配置docker加速器并修改成k8s驱动
daemon.json文件如果没有自己创建
cat >/etc/docker/daemon.json <<EOF
{
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
},
"storage-driver": "overlay2",
"storage-opts": [
"overlay2.override_kernel_check=true"
]
}
EOF
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3、重启Docker服务
systemctl restart docker
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4、配置各节点hosts文件，实际生产环境中，可以规划好内网dns，每台机器可以做一下主机名解析，就不需要配hosts文件
cat > /etc/hosts <<EOF
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.30.106 k8s-master01
192.168.30.107 k8s-master02
192.168.30.108 k8s-master03
192.168.30.109 k8s-node01
192.168.30.110 k8s-node02
EOF
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三、配置环境变量
1、关掉各节点防火墙，安装相关软件
yum install -y conntrack ntpdate ntp ipvsadm ipset jq iptables curl sysstat libseccomp wget vim net-tools git lrzsz
systemctl stop firewalld && systemctl disable firewalld
yum -y install iptables-services && systemctl start iptables && systemctl enable iptables && iptables -F && service iptables save
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2、关闭各节点selinux
setenforce 0 && sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config
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3、关闭各节点swap分区
swapoff -a && sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
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4、同步各节点的时间，这个时间服务，如果机器可以直通外网，那就按以下命令执行就行。
如果机器无法通外网，需要做一台时间服务器，然后别的服务器全部从这台时间服务器同步时间。
yum -y install chrony
systemctl start chronyd.service
systemctl enable chronyd.service
timedatectl set-timezone Asia/Shanghai
chronyc -a makestep
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5、各节点内核调整
cat > /etc/sysctl.d/k8s.conf << EOF
net.ipv4.ip_nonlocal_bind = 1
net.bridge.bridge-nf-call-iptables=1
net.bridge.bridge-nf-call-ip6tables=1
net.ipv4.ip_forward=1
net.ipv4.tcp_tw_recycle=0
vm.swappiness=0 # 禁止使用 swap 空间，只有当系统 OOM 时才允许使用它
vm.overcommit_memory=1 # 不检查物理内存是否够用
vm.panic_on_oom=0 # 开启 OOM
fs.inotify.max_user_instances=8192
fs.inotify.max_user_watches=1048576
fs.file-max=52706963
fs.nr_open=52706963
net.ipv6.conf.all.disable_ipv6=1
net.netfilter.nf_conntrack_max=2310720
EOF
sysctl -p /etc/sysctl.d/k8s.conf
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6、配置各节点k8s的yum源
cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
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7、各节点开启ipvs模块
cat >/etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/sh
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
#modprobe -- nf_conntrack_ipv4 #4以上的内核就没有ipv4
modprobe -- nf_conntrack
EOF
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chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack
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8、设置 rsyslogd 和 systemd journald
mkdir /var/log/journa
mkdir -p /etc/systemd/journald.conf.d/
cat > /etc/systemd/journald.conf.d/99-prophet.conf <<EOF
[Journal]
# 持久化保存到磁盘
Storage=persistent
# 压缩历史日志
Compress=yes
SyncIntervalSec=5m
RateLimitInterval=30s
RateLimitBurst=1000
# 最大占用空间 10G
SystemMaxUse=10G
# 单日志文件最大 200M
SystemMaxFileSize=200M
# 日志保存时间 2 周
MaxRetentionSec=2week
# 不将日志转发到 syslog
ForwardToSyslog=no
EOF
systemctl restart systemd-journald
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10、系统内核升级到最新
CentOS 7.x 系统自带的 3.10.x 内核存在一些 Bugs，导致运行的 Docker、Kubernetes 不稳定
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
# 安装完成后检查 /boot/grub2/grub.cfg 中对应内核 menuentry 中是否包含 initrd16 配置，如果没有，再安装一次！
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升级内核
yum --enablerepo=elrepo-kernel install -y kernel-lt
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设置开机从新内核启动，这地方要注意一下，看你当时最新的版本是多少，括号里就填多少
grub2-set-default 'CentOS Linux (5.4.159-1.el7.elrepo.x86_64) 7 (Core)'
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9、重启服务器（reboot）
四、所有master节点安装keepalived和haproxy服务
1、各master节点安装服务
yum -y install haproxy keepalived
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2、修改k8s-master01配置文件
第一台master为master，后面两台master为backup
# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
# 添加如下内容
script_user root
enable_script_security
}
vrrp_script check_haproxy {
script "/etc/keepalived/check_haproxy.sh" # 检测脚本路径
interval 3
weight -2
fall 10
rise 2
}
vrrp_instance VI_1 {
state MASTER # MASTER
interface ens192 # 本机网卡名
virtual_router_id 51
priority 100 # 权重100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.30.115 # 虚拟IP
}
track_script {
check_haproxy # 模块
}
}
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3、修改k8s-master02配置文件
把这个/etc/keepalived/keepalived.conf配置文件scp 到k8s-master02和k8s-master03，只需要修改
state MASTER # MASTER
priority 100 # 权重100
# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
# 添加如下内容
script_user root
enable_script_security
}
vrrp_script check_haproxy {
script "/etc/keepalived/check_haproxy.sh" # 检测脚本路径
interval 3
weight -2
fall 10
rise 2
}
vrrp_instance VI_1 {
state BACKUP # BACKUP
interface ens192 # 本机网卡名
virtual_router_id 51
priority 99 # 权重99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.30.115 # 虚拟IP
}
track_script {
check_haproxy # 模块
}
}
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4、修改k8s-master03配置文件
# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
# 添加如下内容
script_user root
enable_script_security
}
vrrp_script check_haproxy {
script "/etc/keepalived/check_haproxy.sh" # 检测脚本路径
interval 3
weight -2
fall 10
rise 2
}
vrrp_instance VI_1 {
state BACKUP # BACKUP
interface ens192 # 本机网卡名
virtual_router_id 51
priority 98 # 权重98
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.30.115 # 虚拟IP
}
track_script {
check_haproxy # 模块
}
}
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5、配置三台haproxy.cfg配置文件，三台g配置文件完全一样‘
vim /etc/haproxy/haproxy.cfg
#---------------------------------------------------------------------
# Example configuration for a possible web application. See the
# full configuration options online.
#
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events. This is done
# by adding the '-r' option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend kubernetes-apiserver
mode tcp
bind *:16443
option tcplog
default_backend kubernetes-apiserver
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
listen stats
bind *:1080
stats auth admin:111111
stats refresh 5s
stats realm HAProxy\ Statistics
stats uri /admin?stats
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend kubernetes-apiserver
mode tcp
balance roundrobin
server k8s-master01 192.168.30.106:6443 check
server k8s-master02 192.168.30.107:6443 check
server k8s-master03 192.168.30.108:6443 check
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6、配置keepalived的haproxy检测脚本，三台master都是一样
vim /etc/keepalived/check_haproxy.sh
#!/bin/sh
# HAPROXY down
pid=`ps -C haproxy --no-header | wc -l`
if [ $pid -eq 0 ]
then
systemctl start haproxy
if [ `ps -C haproxy --no-header | wc -l` -eq 0 ]
then
killall -9 haproxy
#这里大家可以自已决定事件处理方法,例如可以发邮件，发短信等等
echo "HAPROXY down" >>/tmp/haproxy_check.log
sleep 10
fi
fi
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7、给检测脚本添加执行权限
chmod 755 /etc/keepalived/check_haproxy.sh
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8、启动haproxy和keepalived服务
systemctl start keepalived && systemctl enable keepalived
systemctl start haproxy && systemctl enable haproxy
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9、查看vip地址
这边配的是k8s-master01是master，所以只能在这台机器上看
ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 00:0c:29:aa:ad:f2 brd ff:ff:ff:ff:ff:ff
inet 192.168.30.106/24 brd 192.168.30.255 scope global ens192
valid_lft forever preferred_lft forever
inet 192.168.30.115/32 scope global ens192 #VIP
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:feaa:adf2/64 scope link
valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:66:67:ee:0b brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
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五、部署集群
安装的kubeadm、kubectl和kubelet要和kubernetes版本一致，kubelet加入开机启动之后不手动启动，要不然会报错，初始化集群之后集群会自动启动kubelet服务！！！
1、安装k8s软件包，每个节点都需要安装这些软件
#直接装最新的
yum install -y kubeadm kubectl kubelet
systemctl enable kubelet && systemctl daemon-reload
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2、获取默认配置文件，登录到k8s-master01机器
kubeadm config print init-defaults > kubeadm-config.yaml
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3、修改配置文件
vim kubeadm-config.yaml
--------------------------------------------------------------------
apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: abcdef.0123456789abcdef
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: 192.168.30.106 # 本机IP
bindPort: 6443
nodeRegistration:
criSocket: /var/run/dockershim.sock
name: k8s-master01 # 本主机名
taints:
- effect: NoSchedule
key: node-role.kubernetes.io/master
---
apiServer:
timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controlPlaneEndpoint: "192.168.30.115:16443" # VIP和haproxy端口
controllerManager: {}
dns:
type: CoreDNS
etcd:
local:
dataDir: /var/lib/etcd
# 镜像仓库源要根据自己实际情况修改
imageRepository: registry.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: 1.22.3 # k8s版本
networking:
dnsDomain: cluster.local
podSubnet: "10.244.0.0/16"
serviceSubnet: 10.96.0.0/12
scheduler: {}
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
#featureGates: #1.20版本以上已经不支持featureGates特性了，注掉就可以
# SupportIPVSProxyMode: true
mode: ipvs
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4、下载相关镜像文件
kubeadm config images pull --config kubeadm-config.yaml
[config/images] Pulled registry.aliyuncs.com/google_containers/kube-apiserver:v1.22.3
[config/images] Pulled registry.aliyuncs.com/google_containers/kube-controller-manager:v1.22.3
[config/images] Pulled registry.aliyuncs.com/google_containers/kube-scheduler:v1.22.3
[config/images] Pulled registry.aliyuncs.com/google_containers/kube-proxy:v1.22.3
[config/images] Pulled registry.aliyuncs.com/google_containers/pause:3.5
[config/images] Pulled registry.aliyuncs.com/google_containers/etcd:3.5.0-0
[config/images] Pulled registry.aliyuncs.com/google_containers/coredns:v1.8.4
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5、初始化集群
# kubeadm init --config kubeadm-config.yaml
[init] Using Kubernetes version: v1.22.0
[preflight] Running pre-flight checks
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "ca" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [k8s-master01 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 192.168.30.106 192.168.30.115]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [k8s-master01 localhost] and IPs [192.168.30.106 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [k8s-master01 localhost] and IPs [192.168.30.106 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Writing "admin.conf" kubeconfig file
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Starting the kubelet
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[apiclient] All control plane components are healthy after 15.041373 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config-1.22" in namespace kube-system with the configuration for the kubelets in the cluster
[upload-certs] Skipping phase. Please see --upload-certs
[mark-control-plane] Marking the node k8s-master01 as control-plane by adding the labels: [node-role.kubernetes.io/master(deprecated) node-role.kubernetes.io/control-plane node.kubernetes.io/exclude-from-external-load-balancers]
[mark-control-plane] Marking the node k8s-master01 as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule]
[bootstrap-token] Using token: abcdef.0123456789abcdef
[bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles
[bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to get nodes
[bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstrap-token] configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstrap-token] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstrap-token] Creating the "cluster-info" ConfigMap in the "kube-public" namespace
[kubelet-finalize] Updating "/etc/kubernetes/kubelet.conf" to point to a rotatable kubelet client certificate and key
[addons] Applied essential addon: CoreDNS
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[addons] Applied essential addon: kube-proxy
Your Kubernetes control-plane has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
Alternatively, if you are the root user, you can run:
export KUBECONFIG=/etc/kubernetes/admin.conf
You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
https://kubernetes.io/docs/concepts/cluster-administration/addons/
You can now join any number of control-plane nodes by copying certificate authorities
and service account keys on each node and then running the following as root:
kubeadm join 192.168.30.115:16443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:dc58e29a96a7bd4c9c9682f93089a0fef39ee18975b41e9d54512d1989e5a07d \
--control-plane
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 192.168.30.115:16443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:dc58e29a96a7bd4c9c9682f93089a0fef39ee18975b41e9d54512d1989e5a07d
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6、在其它两个master节点要创建etcd目录
mkdir -p /etc/kubernetes/pki/etcd
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7、把主master节点证书分别复制到其他2个master节点
scp /etc/kubernetes/pki/ca.* root@192.168.30.107:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/ca.* root@192.168.30.108:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/sa.* root@192.168.30.107:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/sa.* root@192.168.30.108:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/front-proxy-ca.* root@192.168.30.107:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/front-proxy-ca.* root@192.168.30.108:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/etcd/ca.* 192.168.30.107:/etc/kubernetes/pki/etcd/
scp /etc/kubernetes/pki/etcd/ca.* 192.168.30.108:/etc/kubernetes/pki/etcd/
#这个文件master和node节点都需要
scp /etc/kubernetes/admin.conf 192.168.30.107:/etc/kubernetes/
scp /etc/kubernetes/admin.conf 192.168.30.108:/etc/kubernetes/
scp /etc/kubernetes/admin.conf 192.168.30.109:/etc/kubernetes/
scp /etc/kubernetes/admin.conf 192.168.30.110:/etc/kubernetes/
image.gif
8、另外两个master节点加入集群
kubeadm join 192.168.30.115:16443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:47f35fcf0584b3ca586d041057753f2be84dd389004f42a3f92b6c4eb5a42eb1 \
--control-plane
image.gif
9、两个node节点加入集群
kubeadm join 192.168.30.115:16443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:47f35fcf0584b3ca586d041057753f2be84dd389004f42a3f92b6c4eb5a42eb1
image.gif
10、所有master节点执行以下命令，node节点随意
root用户
echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile
source .bash_profile
image.gif
非root用户
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
image.gif
11、在k8s-master01上查看所有节点状态
# kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready control-plane,master 171m v1.22.3
k8s-master02 Ready control-plane,master 167m v1.22.3
k8s-master03 Ready control-plane,master 167m v1.22.3
k8s-node01 Ready <none> 166m v1.22.3
k8s-node02 Ready <none> 166m v1.22.3
image.gif
12、安装网络插件，在k8s-master01机器上执行
如果没有翻墙有可能下不来
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
image.gif
---
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: psp.flannel.unprivileged
annotations:
seccomp.security.alpha.kubernetes.io/allowedProfileNames: docker/default
seccomp.security.alpha.kubernetes.io/defaultProfileName: docker/default
apparmor.security.beta.kubernetes.io/allowedProfileNames: runtime/default
apparmor.security.beta.kubernetes.io/defaultProfileName: runtime/default
spec:
privileged: false
volumes:
- configMap
- secret
- emptyDir
- hostPath
allowedHostPaths:
- pathPrefix: "/etc/cni/net.d"
- pathPrefix: "/etc/kube-flannel"
- pathPrefix: "/run/flannel"
readOnlyRootFilesystem: false
# Users and groups
runAsUser:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
fsGroup:
rule: RunAsAny
# Privilege Escalation
allowPrivilegeEscalation: false
defaultAllowPrivilegeEscalation: false
# Capabilities
allowedCapabilities: ['NET_ADMIN', 'NET_RAW']
defaultAddCapabilities: []
requiredDropCapabilities: []
# Host namespaces
hostPID: false
hostIPC: false
hostNetwork: true
hostPorts:
- min: 0
max: 65535
# SELinux
seLinux:
# SELinux is unused in CaaSP
rule: 'RunAsAny'
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: flannel
rules:
- apiGroups: ['extensions']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames: ['psp.flannel.unprivileged']
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- apiGroups:
- ""
resources:
- nodes
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes/status
verbs:
- patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: flannel
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: flannel
subjects:
- kind: ServiceAccount
name: flannel
namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: flannel
namespace: kube-system
---
kind: ConfigMap
apiVersion: v1
metadata:
name: kube-flannel-cfg
namespace: kube-system
labels:
tier: node
app: flannel
data:
cni-conf.json: |
{
"name": "cbr0",
"cniVersion": "0.3.1",
"plugins": [
{
"type": "flannel",
"delegate": {
"hairpinMode": true,
"isDefaultGateway": true
}
},
{
"type": "portmap",
"capabilities": {
"portMappings": true
}
}
]
}
net-conf.json: |
{
"Network": "10.244.0.0/16",
"Backend": {
"Type": "vxlan"
}
}
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/os
operator: In
values:
- linux
hostNetwork: true
priorityClassName: system-node-critical
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni-plugin
image: rancher/mirrored-flannelcni-flannel-cni-plugin:v1.0.0
command:
- cp
args:
- -f
- /flannel
- /opt/cni/bin/flannel
volumeMounts:
- name: cni-plugin
mountPath: /opt/cni/bin
- name: install-cni
image: quay.io/coreos/flannel:v0.15.1
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: quay.io/coreos/flannel:v0.15.1
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN", "NET_RAW"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni-plugin
hostPath:
path: /opt/cni/bin
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
image.gif
13、再查看节点状态
# kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-7f6cbbb7b8-shbl8 1/1 Running 0 177m
kube-system coredns-7f6cbbb7b8-w6cnn 1/1 Running 0 177m
kube-system etcd-k8s-master01 1/1 Running 2 177m
kube-system etcd-k8s-master02 1/1 Running 1 174m
kube-system etcd-k8s-master03 1/1 Running 0 173m
kube-system kube-apiserver-k8s-master01 1/1 Running 2 177m
kube-system kube-apiserver-k8s-master02 1/1 Running 1 174m
kube-system kube-apiserver-k8s-master03 1/1 Running 2 (173m ago) 174m
kube-system kube-controller-manager-k8s-master01 1/1 Running 4 (173m ago) 177m
kube-system kube-controller-manager-k8s-master02 1/1 Running 1 174m
kube-system kube-controller-manager-k8s-master03 1/1 Running 1 174m
kube-system kube-flannel-ds-49bv5 1/1 Running 0 172m
kube-system kube-flannel-ds-68wq2 1/1 Running 0 172m
kube-system kube-flannel-ds-bc686 1/1 Running 0 172m
kube-system kube-flannel-ds-cgwrl 1/1 Running 0 172m
kube-system kube-flannel-ds-sxn2h 1/1 Running 0 172m
kube-system kube-proxy-7dpmx 1/1 Running 0 173m
kube-system kube-proxy-7n7pl 1/1 Running 0 173m
kube-system kube-proxy-d9z59 1/1 Running 0 177m
kube-system kube-proxy-j8fgg 1/1 Running 0 174m
kube-system kube-proxy-k7qsm 1/1 Running 0 174m
kube-system kube-scheduler-k8s-master01 1/1 Running 4 (173m ago) 177m
kube-system kube-scheduler-k8s-master02 1/1 Running 1 174m
kube-system kube-scheduler-k8s-master03 1/1 Running 1 174m
image.gif
一定是所有的状态为Running才是正常的，如果有以下状态 ，就要去看一下日志（tail -f /var/log/message），分析一下问题，一般的问题 是ipvs环境变量不对等等
kube-system kube-flannel-ds-28jks 0/1 Error 1 28s
kube-system kube-flannel-ds-4w9lz 0/1 Error 1 28s
kube-system kube-flannel-ds-8rflb 0/1 Error 1 28s
kube-system kube-flannel-ds-wfcgq 0/1 Error 1 28s
kube-system kube-flannel-ds-zgn46 0/1 Error 1 28s
kube-system kube-proxy-b8lxm 0/1 CrashLoopBackOff 4 2m15s
kube-system kube-proxy-bmf9q 0/1 CrashLoopBackOff 7 14m
kube-system kube-proxy-bng8p 0/1 CrashLoopBackOff 6 7m31s
kube-system kube-proxy-dpkh4 0/1 CrashLoopBackOff 6 10m
kube-system kube-proxy-xl45p 0/1 CrashLoopBackOff 4 2m30s
image.gif
14、下载etcdctl客户端工具，并安装，在k8s-master01上安装就行
wget https://github.com/etcd-io/etcd/releases/download/v3.4.14/etcd-v3.4.14-linux-amd64.tar.gz
tar -zxf etcd-v3.4.14-linux-amd64.tar.gz
mv etcd-v3.4.14-linux-amd64/etcdctl /usr/local/bin
chmod +x /usr/local/bin/
image.gif
15、验证etcdctl是否能用，只要能输出以下这些日志，说明是没有问题的
# etcdctl
NAME:
etcdctl - A simple command line client for etcd3.
USAGE:
etcdctl [flags]
VERSION:
3.4.14
API VERSION:
3.4
COMMANDS:
alarm disarm Disarms all alarms
alarm list Lists all alarms
auth disable Disables authentication
auth enable Enables authentication
check datascale Check the memory usage of holding data for different workloads on a given server endpoint.
check perf Check the performance of the etcd cluster
compaction Compacts the event history in etcd
defrag Defragments the storage of the etcd members with given endpoints
del Removes the specified key or range of keys [key, range_end)
elect Observes and participates in leader election
endpoint hashkv Prints the KV history hash for each endpoint in --endpoints
endpoint health Checks the healthiness of endpoints specified in `--endpoints` flag
endpoint status Prints out the status of endpoints specified in `--endpoints` flag
get Gets the key or a range of keys
help Help about any command
lease grant Creates leases
lease keep-alive Keeps leases alive (renew)
image.gif
16、查看etcd集群的各种状态
查看etcd集群健康状态
ETCDCTL_API=3 etcdctl --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/peer.crt --key=/etc/kubernetes/pki/etcd/peer.key --write-out=table --endpoints=192.168.30.106:2379,192.168.30.107:2379,192.168.30.108:2379 endpoint health
image.gif
+---------------------+--------+-------------+-------+
| ENDPOINT | HEALTH | TOOK | ERROR |
+---------------------+--------+-------------+-------+
| 192.168.30.106:2379 | true | 35.474753ms | |
| 192.168.30.107:2379 | true | 39.358382ms | |
| 192.168.30.108:2379 | true | 47.269479ms | |
+---------------------+--------+-------------+-------+
image.gif
查看etcd集群可用列表
ETCDCTL_API=3 etcdctl --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/peer.crt --key=/etc/kubernetes/pki/etcd/peer.key --write-out=table --endpoints=192.168.30.106:2379,192.168.30.107:2379,192.168.30.108:2379 member list
image.gif
+------------------+---------+--------------+-----------------------------+-----------------------------+------------+
| ID | STATUS | NAME | PEER ADDRS | CLIENT ADDRS | IS LEARNER |
+------------------+---------+--------------+-----------------------------+-----------------------------+------------+
| 33aecdbe33accd41 | started | k8s-master01 | https://192.168.30.106:2380 | https://192.168.30.106:2379 | false |
| 6bdbdbf3772b7e2c | started | k8s-master02 | https://192.168.30.107:2380 | https://192.168.30.107:2379 | false |
| ce323eca1d06e307 | started | k8s-master03 | https://192.168.30.108:2380 | https://192.168.30.108:2379 | false |
+------------------+---------+--------------+-----------------------------+-----------------------------+------------+
image.gif
查看etcd集群leader状态
ETCDCTL_API=3 etcdctl --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/peer.crt --key=/etc/kubernetes/pki/etcd/peer.key --write-out=table --endpoints=192.168.30.106:2379,192.168.30.107:2379,192.168.30.108:2379 endpoint status
image.gif
+---------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+---------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 192.168.30.106:2379 | 33aecdbe33accd41 | 3.5.0 | 3.3 MB | true | false | 3 | 31405 | 31405 | |
| 192.168.30.107:2379 | 6bdbdbf3772b7e2c | 3.5.0 | 3.2 MB | false | false | 3 | 31405 | 31405 | |
| 192.168.30.108:2379 | ce323eca1d06e307 | 3.5.0 | 3.3 MB | false | false | 3 | 31405 | 31405 | |
+---------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
image.gif
六、部署k8s的dashboard
注：我这边k8s的api版本已经是1.22.3版本了，所有dashboard必需升级到v2.3以上，不能再用v.2.0版本
1、下载recommended.yaml文件，如果没有翻墙，估计下不来
wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.4.0/aio/deploy/recommended.yaml
image.gif
这边我就把下载的文件直接贴出来，以下有两个地方做了修改，就是增加了NodePort模式和端口，看注释就行。
# Copyright 2017 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
apiVersion: v1
kind: Namespace
metadata:
name: kubernetes-dashboard
---
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
---
kind: Service
apiVersion: v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
spec:
type: NodePort #NodePort模式
ports:
- port: 443
targetPort: 8443
nodePort: 30000 #用的是30000端口
selector:
k8s-app: kubernetes-dashboard
---
apiVersion: v1
kind: Secret
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-certs
namespace: kubernetes-dashboard
type: Opaque
---
apiVersion: v1
kind: Secret
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-csrf
namespace: kubernetes-dashboard
type: Opaque
data:
csrf: ""
---
apiVersion: v1
kind: Secret
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-key-holder
namespace: kubernetes-dashboard
type: Opaque
---
kind: ConfigMap
apiVersion: v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-settings
namespace: kubernetes-dashboard
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
rules:
# Allow Dashboard to get, update and delete Dashboard exclusive secrets.
- apiGroups: [""]
resources: ["secrets"]
resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs", "kubernetes-dashboard-csrf"]
verbs: ["get", "update", "delete"]
# Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map.
- apiGroups: [""]
resources: ["configmaps"]
resourceNames: ["kubernetes-dashboard-settings"]
verbs: ["get", "update"]
# Allow Dashboard to get metrics.
- apiGroups: [""]
resources: ["services"]
resourceNames: ["heapster", "dashboard-metrics-scraper"]
verbs: ["proxy"]
- apiGroups: [""]
resources: ["services/proxy"]
resourceNames: ["heapster", "http:heapster:", "https:heapster:", "dashboard-metrics-scraper", "http:dashboard-
metrics-scraper"]
verbs: ["get"]
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
rules:
# Allow Metrics Scraper to get metrics from the Metrics server
- apiGroups: ["metrics.k8s.io"]
resources: ["pods", "nodes"]
verbs: ["get", "list", "watch"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: kubernetes-dashboard
subjects:
- kind: ServiceAccount
name: kubernetes-dashboard
namespace: kubernetes-dashboard
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: kubernetes-dashboard
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: kubernetes-dashboard
subjects:
- kind: ServiceAccount
name: kubernetes-dashboard
namespace: kubernetes-dashboard
---
kind: Deployment
apiVersion: apps/v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
spec:
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
k8s-app: kubernetes-dashboard
template:
metadata:
labels:
k8s-app: kubernetes-dashboard
spec:
containers:
- name: kubernetes-dashboard
image: kubernetesui/dashboard:v2.4.0
imagePullPolicy: Always
ports:
- containerPort: 8443
protocol: TCP
args:
- --auto-generate-certificates
- --namespace=kubernetes-dashboard
# Uncomment the following line to manually specify Kubernetes API server Host
# If not specified, Dashboard will attempt to auto discover the API server and connect
# to it. Uncomment only if the default does not work.
# - --apiserver-host=http://my-address:port
volumeMounts:
- name: kubernetes-dashboard-certs
mountPath: /certs
# Create on-disk volume to store exec logs
- mountPath: /tmp
name: tmp-volume
livenessProbe:
httpGet:
scheme: HTTPS
path: /
port: 8443
initialDelaySeconds: 30
timeoutSeconds: 30
securityContext:
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
runAsUser: 1001
runAsGroup: 2001
volumes:
- name: kubernetes-dashboard-certs
secret:
secretName: kubernetes-dashboard-certs
- name: tmp-volume
emptyDir: {}
serviceAccountName: kubernetes-dashboard
nodeSelector:
"kubernetes.io/os": linux
# Comment the following tolerations if Dashboard must not be deployed on master
tolerations:
- key: node-role.kubernetes.io/master
effect: NoSchedule
---
kind: Service
apiVersion: v1
metadata:
labels:
k8s-app: dashboard-metrics-scraper
name: dashboard-metrics-scraper
namespace: kubernetes-dashboard
spec:
ports:
- port: 8000
targetPort: 8000
selector:
k8s-app: dashboard-metrics-scraper
---
kind: Deployment
apiVersion: apps/v1
metadata:
labels:
k8s-app: dashboard-metrics-scraper
name: dashboard-metrics-scraper
namespace: kubernetes-dashboard
spec:
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
k8s-app: dashboard-metrics-scraper
template:
metadata:
labels:
k8s-app: dashboard-metrics-scraper
spec:
securityContext:
seccompProfile:
type: RuntimeDefault
containers:
- name: dashboard-metrics-scraper
image: kubernetesui/metrics-scraper:v1.0.7
ports:
- containerPort: 8000
protocol: TCP
livenessProbe:
httpGet:
scheme: HTTP
path: /
port: 8000
initialDelaySeconds: 30
timeoutSeconds: 30
volumeMounts:
- mountPath: /tmp
name: tmp-volume
securityContext:
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
runAsUser: 1001
runAsGroup: 2001
serviceAccountName: kubernetes-dashboard
nodeSelector:
"kubernetes.io/os": linux
# Comment the following tolerations if Dashboard must not be deployed on master
tolerations:
- key: node-role.kubernetes.io/master
effect: NoSchedule
volumes:
- name: tmp-volume
emptyDir: {}
image.gif
安装
kubectl apply -f recommended.yaml
image.gif
2、 查看安装结果
ingress-nginx ingress-nginx-admission-create--1-d5xsw 0/1 Completed 0 4h22m
ingress-nginx ingress-nginx-admission-patch--1-t975b 0/1 Completed 1 4h22m
ingress-nginx ingress-nginx-controller-55888bbc94-82vsl 1/1 Running 0 4h22m
ingress-nginx ingress-nginx-controller-55888bbc94-z2f97 1/1 Running 0 4h22m
kube-system coredns-7f6cbbb7b8-8n9vq 1/1 Running 0 3h44m
kube-system coredns-7f6cbbb7b8-jqxc2 1/1 Running 0 3h44m
kube-system etcd-k8s-master01 1/1 Running 8 (3h49m ago) 3d23h
kube-system etcd-k8s-master02 1/1 Running 2 3d23h
kube-system etcd-k8s-master03 1/1 Running 1 3d23h
kube-system kube-apiserver-k8s-master01 1/1 Running 8 (3h49m ago) 3d23h
kube-system kube-apiserver-k8s-master02 1/1 Running 2 3d23h
kube-system kube-apiserver-k8s-master03 1/1 Running 4 (3d23h ago) 3d23h
kube-system kube-controller-manager-k8s-master01 1/1 Running 11 (3h49m ago) 3d23h
kube-system kube-controller-manager-k8s-master02 1/1 Running 2 3d23h
kube-system kube-controller-manager-k8s-master03 1/1 Running 2 3d23h
kube-system kube-flannel-ds-hqhc7 1/1 Running 1 (2d23h ago) 3d22h
kube-system kube-flannel-ds-k2kgk 1/1 Running 8 (2d23h ago) 3d23h
kube-system kube-flannel-ds-s7sxm 1/1 Running 6 (3h49m ago) 3d23h
kube-system kube-flannel-ds-t7l8t 1/1 Running 0 3d23h
kube-system kube-flannel-ds-vthj9 1/1 Running 0 3d23h
kube-system kube-proxy-6wk8x 1/1 Running 1 (2d23h ago) 3d1h
kube-system kube-proxy-gxjrr 1/1 Running 8 (2d23h ago) 3d1h
kube-system kube-proxy-q9w7m 1/1 Running 0 3d1h
kube-system kube-proxy-trq2p 1/1 Running 0 3d1h
kube-system kube-proxy-w8lfw 1/1 Running 4 (3h49m ago) 3d1h
kube-system kube-scheduler-k8s-master01 1/1 Running 11 (3h49m ago) 3d23h
kube-system kube-scheduler-k8s-master02 1/1 Running 2 3d23h
kube-system kube-scheduler-k8s-master03 1/1 Running 2 3d23h
kubernetes-dashboard dashboard-metrics-scraper-c45b7869d-ckhcl 1/1 Running 0 9m28s
kubernetes-dashboard kubernetes-dashboard-576cb95f94-jnv7f 1/1 Running 0 9m28s
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3、 查看dashboard服务
kubectl get service -n kubernetes-dashboard -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
dashboard-metrics-scraper ClusterIP 10.96.145.101 <none> 8000/TCP 132m k8s-app=dashboard-metrics-scraper
kubernetes-dashboard NodePort 10.110.14.77 <none> 443:30000/TCP 132m k8s-app=kubernetes-dashboard
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4、 创建dashoard管理员
vim dashboard-admin.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: kubernetes-dashboard
name: dashboard-admin
namespace: kubernetes-dashboard
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部署
kubectl apply -f dashboard-admin.yaml
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5、 为管理员分配权限
vim dashboard-admin-bind-cluster-role.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: dashboard-admin-bind-cluster-role
labels:
k8s-app: kubernetes-dashboard
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: dashboard-admin
namespace: kubernetes-dashboard
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部署
kubectl apply -f dashboard-admin-bind-cluster-role.yaml
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6、 查看管理员Token
# kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep dashboard-admin | awk '{print $1}')
Name: dashboard-admin-token-tzp2d
Namespace: kubernetes-dashboard
Labels: <none>
Annotations: kubernetes.io/service-account.name: dashboard-admin
kubernetes.io/service-account.uid: 37a23381-007c-4bab-a07b-42767a56d859
Type: kubernetes.io/service-account-token
Data
====
ca.crt: 1099 bytes
namespace: 20 bytes
token: eyJhbGciOiJSUzI1NiIsImtpZCI6InRFRF9MWlhDLVZ2MkJjT2tXUXQ4QlRhWVowOTVTRTBkZ2tDcF9xaE5qOFEifQ.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.TIWkVlu7SrwK9GetIC9eE32sgzuta0Zy52Ta3KkPmlQaINgqZx38I3nrFJ1u_641tENNu_60T3PjCbZweiqmpPTiyazL9Lw8uSQ5sbX3hauSzC5xOA1CX4AH1KEUnBYwWhuI-1VpXeXX-nVn7PoDElNoHBdXZ2l3NNLx2KmmaFoXHiVXAiIzTvSGY4DxJ9y6g2Tyz7GFOlOfOgpKYbVZlKufqrXEiO5SoUE_WndJSlt65UydQZ_zwmhA_6zWSxTDj2jF1o76eYXjpMLT0ioM51k-OzgljnRKZU7Jy67XJzj5VdJuDUdTZ0KADhF2XAkh-Vre0tjMk0867VHq0K_Big
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7、 打开浏览器，输入：http://192.168.30.115:30000
选择Token，输入前面查到的Token
image
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image
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到此高可用的k8s服务已经部署完成，测试了一下把k8s-master01关掉，服务一直可用，只有dashboard页面会闪断。
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