kubeadm 之k8s 多master 部署
环境初始设置
主机名修改
hostnamectl set-hostname master-１ && exec bash hostnamectl set-hostname master-２ && exec bash hostnamectl set-hostname node-1 && exec bash
统一设置host文件
/etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.10.29 master-1 192.168.10.30 master-2 192.168.10.31 node-1
设置双机免密登录
[root@master-1 ~]# ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Created directory '/root/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: SHA256:lgzlxsYu///hScHtRNsUqUiNHuM/HyvYBJ3aiavnnYM root@master-1 The key's randomart image is: +---[RSA 2048]----+ | . o ..| | = = . ..| | . * + = o o| | * . = = +o| | . S * +.+| | + o * = | | . * = +| | . E.*.= | | .=o.+* | +----[SHA256]-----+ [root@master-1 ~]# ssh-copy-id master-1 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host 'master-1 (192.168.10.29)' can't be established. ECDSA key fingerprint is SHA256:T9yZYCrcVc0EtAUoRLsxgWbeKAM+x3Can+rpn9MjpnM. ECDSA key fingerprint is MD5:42:ea:9c:5d:f9:96:02:df:d8:1d:ee:c4:7c:61:f5:ad. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@master-1's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'master-1'" and check to make sure that only the key(s) you wanted were added. [root@master-1 ~]# ssh-copy-id master-2 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host 'master-2 (192.168.10.30)' can't be established. ECDSA key fingerprint is SHA256:T9yZYCrcVc0EtAUoRLsxgWbeKAM+x3Can+rpn9MjpnM. ECDSA key fingerprint is MD5:42:ea:9c:5d:f9:96:02:df:d8:1d:ee:c4:7c:61:f5:ad. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@master-2's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'master-2'" and check to make sure that only the key(s) you wanted were added. [root@master-1 ~]# ssh-copy-id node-2 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" ^C [root@master-1 ~]# ssh-copy-id node-1\ > /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host 'node-1 (192.168.10.31)' can't be established. ECDSA key fingerprint is SHA256:T9yZYCrcVc0EtAUoRLsxgWbeKAM+x3Can+rpn9MjpnM. ECDSA key fingerprint is MD5:42:ea:9c:5d:f9:96:02:df:d8:1d:ee:c4:7c:61:f5:ad. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@node-1's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'node-1'" and check to make sure that only the key(s) you wanted were added. [root@master-2 ~]# ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: SHA256:zMT6ci/nxV2Iy5n5WWUgVS3+kHMSIq/Tgf0zUpo8aDM root@master-2 The key's randomart image is: +---[RSA 2048]----+ | ..o| | . . ..o .| | o =.o.+ | | = . +oBo.| | . S =.*.*+| | . EoB*+oo| | . o. +Oo.o.| | o.... . o | | +o o | +----[SHA256]-----+ [root@master-2 ~]# ssh-copy-id master-1 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host 'master-1 (192.168.10.29)' can't be established. ECDSA key fingerprint is SHA256:T9yZYCrcVc0EtAUoRLsxgWbeKAM+x3Can+rpn9MjpnM. ECDSA key fingerprint is MD5:42:ea:9c:5d:f9:96:02:df:d8:1d:ee:c4:7c:61:f5:ad. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@master-1's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'master-1'" and check to make sure that only the key(s) you wanted were added. [root@master-2 ~]# ssh-copy-id master-2 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host 'master-2 (192.168.10.30)' can't be established. ECDSA key fingerprint is SHA256:T9yZYCrcVc0EtAUoRLsxgWbeKAM+x3Can+rpn9MjpnM. ECDSA key fingerprint is MD5:42:ea:9c:5d:f9:96:02:df:d8:1d:ee:c4:7c:61:f5:ad. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@master-2's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'master-2'" and check to make sure that only the key(s) you wanted were added. [root@master-2 ~]# ssh-copy-id node-1 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host 'node-1 (192.168.10.31)' can't be established. ECDSA key fingerprint is SHA256:T9yZYCrcVc0EtAUoRLsxgWbeKAM+x3Can+rpn9MjpnM. ECDSA key fingerprint is MD5:42:ea:9c:5d:f9:96:02:df:d8:1d:ee:c4:7c:61:f5:ad. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@node-1's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'node-1'" and check to make sure that only the key(s) you wanted were added. [root@node-1 ~]# setenforce 0 setenforce: SELinux is disabled [root@node-1 ~]# ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: SHA256:VFobKW3tU3J1iDDcJt3zI2reWb+KklK8ujImSgs19WM root@node-1 The key's randomart image is: +---[RSA 2048]----+ | o** o oo| | .+*+B * .| | . oo.+ + o | | . . . o. ..| | o E S ... .| | . . . . o o . | |.. . = . o .| |o .. + . + ..o .| | o. o oo+ .. ....| +----[SHA256]-----+ [root@node-1 ~]# ssh-copy-id node-1 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host 'node-1 (192.168.10.31)' can't be established. ECDSA key fingerprint is SHA256:T9yZYCrcVc0EtAUoRLsxgWbeKAM+x3Can+rpn9MjpnM. ECDSA key fingerprint is MD5:42:ea:9c:5d:f9:96:02:df:d8:1d:ee:c4:7c:61:f5:ad. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@node-1's password: Permission denied, please try again. root@node-1's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'node-1'" and check to make sure that only the key(s) you wanted were added. [root@node-1 ~]# ssh-copy-id master-1 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host 'master-1 (192.168.10.29)' can't be established. ECDSA key fingerprint is SHA256:T9yZYCrcVc0EtAUoRLsxgWbeKAM+x3Can+rpn9MjpnM. ECDSA key fingerprint is MD5:42:ea:9c:5d:f9:96:02:df:d8:1d:ee:c4:7c:61:f5:ad. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@master-1's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'master-1'" and check to make sure that only the key(s) you wanted were added. [root@node-1 ~]# ssh-copy-id master-2 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host 'master-2 (192.168.10.30)' can't be established. ECDSA key fingerprint is SHA256:T9yZYCrcVc0EtAUoRLsxgWbeKAM+x3Can+rpn9MjpnM. ECDSA key fingerprint is MD5:42:ea:9c:5d:f9:96:02:df:d8:1d:ee:c4:7c:61:f5:ad. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@master-2's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'master-2'" and check to make sure that only the key(s) you wanted were added.
关闭交换分区
swapoff -a vim /etc/fstab # # /etc/fstab # Created by anaconda on Sun Feb 7 10:14:45 2021 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/centos-root / xfs defaults 0 0 UUID=ec65c557-715f-4f2b-beae-ec564c71b66b /boot xfs defaults 0 0 #/dev/mapper/centos-swap swap swap defaults 0 0 ~
关闭防火墙与selinux
systemctl disable firewalld.service systemctl stop firewalld.service setenforce 0 setenforce: SELinux is disabled vim /etc/selinux/config ' # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of three values: # targeted - Targeted processes are protected, # minimum - Modification of targeted policy. Only selected processes are protected. # mls - Multi Level Security protection. SELINUXTYPE=targeted
加载ipvs内核模块
modprobe br_netfilter echo "modprobe br_netfilter" >> /etc/profile lsmod | grep br_netfilter br_netfilter 22256 0 bridge 151336 1 br_netfilter
编写调用网络模块文件
cat > /etc/sysctl.d/k8s.conf <<EOF net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 net.ipv4.ip_forward = 1 EOF
net.bridge.bridge-nf-call-ip6tables = 1 开启容器网络转发
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1 开启数据包转发
sysctl -p /etc/sysctl.d/k8s.conf
安装docker
# step 1: 安装必要的一些系统工具 yum install -y yum-utils device-mapper-persistent-data lvm2 # Step 2: 添加软件源信息 yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo # Step 3: 更新并安装 Docker-CE yum makecache fast yum -y install docker-ce # Step 4: 开启Docker服务 service docker start
配置k8s的yum源
cat <<EOF > /etc/yum.repos.d/kubernetes.repo [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 setenforce 0
设置时间同步计划任务
crontab -e crontab: installing new crontab crontab -l * */1 * * * /usr/sbin/ntpdate time.windows.com >/dev/null 您在 /var/spool/mail/root 中有新邮件 systemctl restart crond.service
加载ipvs
cd /etc/sysconfig/modules/
cat ipvs.modules
#!/bin/bash
ipvs_modules="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 nf_conntrack"
for kernel_module in ${ipvs_modules}; do
/sbin/modinfo -F filename ${kernel_module} > /dev/null 2>&1
if [ 0 -eq 0 ]; then
/sbin/modprobe ${kernel_module}
fi
done
chmod +x ipvs.modules 授权
./ipvs.modules 运行
lsmod | grep ip_vs 查看是否加载
ip_vs_ftp 13079 0
nf_nat 26787 1 ip_vs_ftp
ip_vs_sed 12519 0
ip_vs_nq 12516 0
ip_vs_sh 12688 0
ip_vs_dh 12688 0
ip_vs_lblcr 12922 0
ip_vs_lblc 12819 0
ip_vs_wrr 12697 0
ip_vs_rr 12600 0
ip_vs_wlc 12519 0
ip_vs_lc 12516 0
ip_vs 145497 22 ip_vs_dh,ip_vs_lc,ip_vs_nq,ip_vs_rr,ip_vs_sh,ip_vs_ftp,ip_vs_sed,ip_vs_wlc,ip_vs_wrr,ip_vs_lblcr,ip_vs_lblc
nf_conntrack 133095 2 ip_vs,nf_nat
libcrc32c 12644 4 xfs,ip_vs,nf_nat,nf_conntrack
启动docker配置
systemctl start docker.service systemctl enable docker.service
配置镜像加速器及docker启动驱动
cat /etc/docker/daemon.json
{
"registry-mirrors": ["http://f1361db2.m.daocloud.io"], #注意逗号分开
"exec-opts": ["native.cgroupdriver=systemd"] #修改驱动
}
重启
systemctl restart docker
安装k8s 初始化所需安装包
yum install -y kubelet-1.20.6 kubeadm-1.20.6 kubectl-1.20.6 systemctl enable kubelet.service
配置ng+keepalived的高可用api-server
设置两个master节点允许监听非本机端口
echo "net.ipv4.ip_nonlocal_bind=1" >> /etc/sysctl.conf sysctl -p
安装nginx nginx-mod-stream (四层模块)
yum -y install nginx keepalived nginx-mod-stream
ng主从配置一样
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
include /usr/share/nginx/modules/*.conf;
events {
worker_connections 1024;
}
# 四层负载均衡，为两台Master apiserver组件提供负载均衡
stream {
log_format main '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 192.168.10.29:6443; # Master1 APISERVER IP:PORT
server 192.168.10.30:6443; # Master2 APISERVER IP:PORT
}
server {
listen 192.168.10.28:16443; # 由于nginx与master节点复用，这个IP是vip监听
proxy_pass k8s-apiserver;
}
}
http {
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
server {
listen 80 default_server;
server_name _;
location / {
}
}
}
配置高可用主节点
vim /etc/keepalived/keepalived.conf
global_defs {
notification_email {
root@localhost
}
notification_email_from ka1@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
vrrp_mcast_group4 224.111.111.111
}
vrrp_script chk_ng {
script "ss -lntp | grep 192.168.10.28"
interval 2
weight -10
fall 2
rise 2
}
vrrp_instance External_1 {
state MASTER
interface ens33
virtual_router_id 171
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1402b1b5
}
virtual_ipaddress {
192.168.10.28/24
}
track_script {
chk_ng
}
}
从节点
cat /etc/keepalived/keepalived.conf
global_defs {
notification_email {
root@localhost
}
notification_email_from ka2@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
vrrp_mcast_group4 224.111.111.111
}
vrrp_script chk_ng {
script "ss -lntp | grep 192.168.10.28"
interval 2
weight -10
fall 2
rise 2
}
vrrp_instance External_1 {
state BACKUP
interface ens33
virtual_router_id 171
priority 95
advert_int 1
authentication {
auth_type PASS
auth_pass 1402b1b5
}
virtual_ipaddress {
192.168.10.28/24
}
track_script {
chk_ng
}
}
设置开机自启
systemctl enable keepalived.service systemctl enable nginx.service
初始化k8s集群master-1节点root家目录
master-1 ~]# vim kubeadm-config.yaml apiVersion: kubeadm.k8s.io/v1beta2 kind: ClusterConfiguration kubernetesVersion: v1.20.6 controlPlaneEndpoint: 192.168.10.28:16443 imageRepository: registry.aliyuncs.com/google_containers apiServer: certSANs: - 192.168.10.28 - 192.168.10.29 - 192.168.10.30 - 192.168.10.31 networking: podSubnet: 10.244.0.0/16 serviceSubnet: 10.10.0.0/16 --- apiVersion: kubeproxy.config.k8s.io/v1alpha1 kind: KubeProxyConfiguration mode: ipvs
初始化操作
[root@master-1 ~]# kubeadm init --config kubeadm-config.yaml
[init] Using Kubernetes version: v1.20.6
[preflight] Running pre-flight checks
[WARNING SystemVerification]: this Docker version is not on the lis
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 192.168.10.28:16443 --token q67anl.4yjg1lvquk63dp5r \
--discovery-token-ca-cert-hash sha256:921b72ea60e0d84050ad24b8aa9790d53bd0d38d6cb13624ecdf33f99a4041df \
--control-plane
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 192.168.10.28:16443 --token q67anl.4yjg1lvquk63dp5r \
--discovery-token-ca-cert-hash sha256:921b72ea60e0d84050ad24b8aa9790d53bd0d38d6cb13624ecdf33f99a4041df
[root@master-1 ~]# mkdir -p $HOME/.kube
[root@master-1 ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@master-1 ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config
[root@master-1 ~]#
master-2 创建证书目录
[root@master-2 modules]# cd /root && mkdir -p /etc/kubernetes/pki/etcd &&mkdir -p ~/.kube/
从master-1拷贝证书目录，并在master-2删除多余的证书
[root@master-1 ~]# scp -r /etc/kubernetes/pki/* master-2:/etc/kubernetes/pki/ [root@master-2 ~]# rm -f /etc/kubernetes/pki/apiserver* [root@master-2 ~]# rm -f /etc/kubernetes/pki/etcd/healthcheck-client.* /etc/kubernetes/pki/etcd/peer.* /etc/kubernetes/pki/etcd/server.*
注意master1上查看加入节点的命令：（24小时后会重新生成）加入控制节点只需后面加入跟 --control-plane 参数
[root@master-1 ~]# kubeadm token create --print-join-command kubeadm join 192.168.10.28:16443 --token wcocyz.3ooph0ydisfgkzey --discovery-token-ca-cert-hash sha256:921b72ea60e0d84050ad24b8aa9790d53bd0d38d6cb13624ecdf33f99a4041df
将master-2初始化加入集群
[root@master-2 ~]# kubeadm join 192.168.10.28:16443 --token q67anl.4yjg1lvquk63dp5r --discovery-token-ca-cert-hash sha256:921b72ea60e0d84050ad24b8aa9790d53bd0d38d6cb13624ecdf33f99a4041df --control-plan e mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config
加入node 节点
[root@node-1 ~]# kubeadm join 192.168.10.28:16443 --token wcocyz.3ooph0ydisfgkzey --discovery-token-ca-cert-hash sha256:921b72ea60e0d84050ad24b8aa9790d53bd0d38d6cb13624ecdf33f99a4041df [preflight] Running pre-flight checks [WARNING SystemVerification]: this Docker version is not on the list of validated versions: 20.10.11. Latest validated version: 19.03 [preflight] Reading configuration from the cluster... [preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml' [kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml" [kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env" [kubelet-start] Starting the kubelet [kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap... This node has joined the cluster: * Certificate signing request was sent to apiserver and a response was received. * The Kubelet was informed of the new secure connection details. Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
查看集群状态
[root@master-1 ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION master-1 NotReady control-plane,master 37m v1.20.6 master-2 NotReady control-plane,master 12m v1.20.6 node-1 NotReady <none> 106s v1.20.6
安装calico 网络插件
[root@master-1 ~]#kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml [root@master-1 ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION master-1 Ready control-plane,master 45m v1.20.6 master-2 Ready control-plane,master 19m v1.20.6 node-1 Ready <none> 9m8s v1.20.6
查看pod 详细信息
[root@master-1 ~]# kubectl get pods -n kube-system -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES calico-kube-controllers-558995777d-66vfv 1/1 Running 0 2m51s 10.244.84.130 node-1 <none> <none> calico-node-dmlrb 1/1 Running 0 2m50s 192.168.10.30 master-2 <none> <none> calico-node-wgtnv 1/1 Running 0 2m50s 192.168.10.29 master-1 <none> <none> calico-node-xgl9t 1/1 Running 0 2m50s 192.168.10.31 node-1 <none> <none> coredns-7f89b7bc75-5fqvb 1/1 Running 0 44m 10.244.84.131 node-1 <none> <none> coredns-7f89b7bc75-9wqcb 1/1 Running 0 44m 10.244.84.129 node-1 <none> <none> etcd-master-1 1/1 Running 0 44m 192.168.10.29 master-1 <none> <none> etcd-master-2 1/1 Running 0 18m 192.168.10.30 master-2 <none> <none> kube-apiserver-master-1 1/1 Running 0 44m 192.168.10.29 master-1 <none> <none> kube-apiserver-master-2 1/1 Running 0 18m 192.168.10.30 master-2 <none> <none> kube-controller-manager-master-1 1/1 Running 1 44m 192.168.10.29 master-1 <none> <none> kube-controller-manager-master-2 1/1 Running 0 18m 192.168.10.30 master-2 <none> <none> kube-proxy-bkl67 1/1 Running 0 8m42s 192.168.10.31 node-1 <none> <none> kube-proxy-c7tqq 1/1 Running 0 44m 192.168.10.29 master-1 <none> <none> kube-proxy-mjxzz 1/1 Running 0 18m 192.168.10.30 master-2 <none> <none> kube-scheduler-master-1 1/1 Running 1 44m 192.168.10.29 master-1 <none> <none> kube-scheduler-master-2 1/1 Running 0 18m 192.168.10.30 master-2 <none> <none>
测试网络
[root@master-1 ~]# kubectl run busybox --image busybox:1.28 --restart=Never --rm -it busybox -- sh If you don't see a command prompt, try pressing enter. / # ping www.baidu.com PING www.baidu.com (103.235.46.39): 56 data bytes 64 bytes from 103.235.46.39: seq=0 ttl=127 time=33.008 ms 64 bytes from 103.235.46.39: seq=1 ttl=127 time=29.207 ms 64 bytes from 103.235.46.39: seq=2 ttl=127 time=27.405 ms ^C --- www.baidu.com ping statistics --- 3 packets transmitted, 3 packets received, 0% packet loss round-trip min/avg/max = 27.405/29.873/33.008 ms / #
应用测试
[root@master-1 ~]# cat tomcat.yaml
apiVersion: v1 #pod属于k8s核心组v1
kind: Pod #创建的是一个Pod资源
metadata: #元数据
name: demo-pod #pod名字
namespace: default #pod所属的名称空间
labels:
app: myapp #pod具有的标签
env: dev #pod具有的标签
spec:
containers: #定义一个容器，容器是对象列表，下面可以有多个name
- name: tomcat-pod-java #容器的名字
ports:
- containerPort: 8080
image: tomcat:8.5-jre8-alpine #容器使用的镜像
imagePullPolicy: IfNotPresent
[root@master-1 ~]# cat tomcat-service.yaml
apiVersion: v1
kind: Service
metadata:
name: tomcat
spec:
type: NodePort
ports:
- port: 8080
nodePort: 30080
selector:
app: myapp
env: dev
[root@master-1 ~]# kubectl apply -f tomcat.yaml
[root@master-1 ~]# kubectl apply -f tomcat-service.yaml
[root@master-1 ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S)
AGEkubernetes ClusterIP 10.10.0.1 <none> 443/TCP
62mtomcat NodePort 10.10.69.243 <none> 8080:30080/TCP
3s
浏览器访问集群IP:30080
草都可以从石头缝隙中长出来更可况你呢
