国产化银河麒麟操作系统（Kylin）部署K8S集群
一、K8S集群节点准备
1.1 主机操作系统说明
| 序号 | 操作系统及版本 | 备注 |
|---|---|---|
| 1 | Kylin-Server-10-SP2-x86 |
1.2 主机硬件配置说明
| 需求 | CPU | 内存 | 硬盘 | 角色 | 主机名 |
|---|---|---|---|---|---|
| 值 | 4C | 8G | 100GB | slave1 | slave1 |
| 值 | 4C | 8G | 100GB | slave2 | slave2 |
1.3 主机配置
1.3.1 主机名配置
由于本次使用2台主机完成kubernetes集群部署，其中1台为master节点,名称为slave1;其中1台为slave2节点，名称分别为：slave2
slave1节点
# hostnamectl set-hostname salve1
salve2节点
# hostnamectl set-hostname slave2
### 1.3.2 主机IP地址配置
~~~powershell
salve1节点IP地址为：192.168.71.102/24
# vim /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="none"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
DEVICE="ens33"
ONBOOT="yes"
IPADDR="192.168.71.102"
PREFIX="24"
GATEWAY="192.168.71.2"
DNS1="8.8.8.8"
salve2节点IP地址为：192.168.71.103/24
# vim /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="none"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
DEVICE="ens33"
ONBOOT="yes"
IPADDR="192.168.71.103"
PREFIX="24"
GATEWAY="192.168.71.2"
DNS1="8.8.8.8"
1.3.3 主机名与IP地址解析
所有集群主机均需要进行配置。
# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.71.102 slave1
192.168.71.103 salve2
1.3.4 防火墙配置
所有主机均需要操作。
关闭现有防火墙firewalld
# systemctl disable firewalld
# systemctl stop firewalld
# firewall-cmd --state
not running
1.3.5 SELINUX配置
所有主机均需要操作。修改SELinux配置需要重启操作系统。
# sed -ri 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
1.3.6 时间同步配置
所有主机均需要操作。最小化安装系统需要安装ntpdate软件。
# crontab -l
0 */1 * * * /usr/sbin/ntpdate time1.aliyun.com
1.3.7 配置内核转发及网桥过滤
所有主机均需要操作。
添加网桥过滤及内核转发配置文件
# cat /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
vm.swappiness = 0
加载br_netfilter模块
# modprobe br_netfilter
查看是否加载
# lsmod | grep br_netfilter
br_netfilter 22256 0
bridge 151336 1 br_netfilter
1.3.8 安装ipset及ipvsadm
所有主机均需要操作。
安装ipset及ipvsadm
# yum -y install ipset ipvsadm
配置ipvsadm模块加载方式
添加需要加载的模块
# cat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack
EOF
授权、运行、检查是否加载
# chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack
1.3.9 关闭SWAP分区
修改完成后需要重启操作系统，如不重启，可临时关闭，命令为swapoff -a
临时关闭
# swapoff -a
永远关闭swap分区，需要重启操作系统
# cat /etc/fstab
......
# /dev/mapper/centos-swap swap swap defaults 0 0
在上一行中行首添加#
二、 Docker准备
2.1 Docker安装包准备
二进制方式安装
2.2 Docker安装
链接：https://pan.baidu.com/s/1Tm4sdpM2eInUKhrf9aZYrQ?pwd=v63r
提取码：v63r
–来自百度网盘超级会员V3的分享
# tar -xzxf docker-19.03.10.tgz
# chmod +x docker/*
# cp docker/* /usr/bin/
2.3 启动Docker服务
# vim /usr/lib/systemd/system/docker.service
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
ExecStart=/usr/bin/dockerd
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
# systemctl enable --now docker
2.4 修改cgroup方式
/etc/docker/daemon.json 默认没有此文件，需要单独创建
在/etc/docker/daemon.json添加如下内容
# cat /etc/docker/daemon.json
{
"exec-opts": ["native.cgroupdriver=systemd"]
}
# systemctl restart docker
三、kubernetes 1.23.6 集群部署
3.2 kubernetes YUM源准备
3.2.1 谷歌YUM源
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg
https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
3.2.2 阿里云YUM源
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
3.3 集群软件安装
所有节点均可安装
默认安装
# yum -y install kubeadm kubelet kubectl
查看指定版本
# yum list kubeadm.x86_64 --showduplicates | sort -r
# yum list kubelet.x86_64 --showduplicates | sort -r
# yum list kubectl.x86_64 --showduplicates | sort -r
安装指定版本
# yum -y install kubeadm-1.23.6-0 kubelet-1.23.6-0 kubectl-1.23.6-0
## 3.4 配置kubelet
>为了实现docker使用的cgroupdriver与kubelet使用的cgroup的一致性，建议修改如下文件内容。
~~~powershell
# vim /etc/sysconfig/kubelet
KUBELET_EXTRA_ARGS="--cgroup-driver=systemd"
设置kubelet为开机自启动即可，由于没有生成配置文件，集群初始化后自动启动
# systemctl enable kubelet
3.5 集群镜像准备
可使用VPN实现下载。
# kubeadm config images list --kubernetes-version=v1.23.6
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers:kube-apiserver:v1.23.6
3.6 集群初始化
K8S 1.23.6版本集群初始化
[root@k8s-master01 ~]# kubeadm init --kubernetes-version=v1.23.6 --pod-network-cidr=10.224.0.0/16 --apiserver-advertise-address=192.168.71.102
初始化过程输出
[init] Using Kubernetes version: v1.23.6
[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 [10.96.0.1 192.168.71.200]
[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 [192.168.10.200 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [k8s-master01 localhost] and IPs [192.168.10.200 127.0.0.1 ::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"
[kubeconfig] Writing "admin.conf" kubeconfig file
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[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 13.006785 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config" 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/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 node-role.kubernetes.io/control-plane:NoSchedule]
[bootstrap-token] Using token: 8x4o2u.hslo8xzwwlrncr8s
[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
[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/
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 192.168.71.102:6443 --token 8x4o2u.hslo8xzwwlrncr8s \
--discovery-token-ca-cert-hash sha256:7323a8b0658fc33d89e627f078f6eb16ac94394f9a91b3335dd3ce73a3f313a0
3.7 集群应用客户端管理集群文件准备
[root@k8s-master01 ~]# mkdir -p $HOME/.kube
[root@k8s-master01 ~]# cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@k8s-master01 ~]# chown $(id -u):$(id -g) $HOME/.kube/config
[root@k8s-master01 ~]# ls /root/.kube/
config
3.8 集群网络准备
链接：https://pan.baidu.com/s/14r7g_4E0kKNygZnWKd5U2Q?pwd=hslo
提取码：hslo
–来自百度网盘超级会员V3的分享
3.9 集群工作节点添加
K8S 1.23版本集群加入方法
[root@k8s-worker0X ~]# kubeadm join 192.168.71.102:6443 --token 8x4o2u.hslo8xzwwlrncr8s \ --discovery-token-ca-cert-hash sha256:7323a8b0658fc33d89e627f078f6eb16ac94394f9a91b3335dd3ce73a3f313a0