K8s - openeuler2203SP1安装 K8s + flannel
情况说明# uname -a
Linux master-1 5.10.0-136.12.0.86.oe2203sp1.x86_64 #1 SMP Tue Dec 27 17:50:15 CST 2022 x86_64 x86_64 x86_64 GNU/Linux
安装过程
1、安装 containerd
[*] 下载 tar 包
# 确保没有使用官方仓库的containerd
# yum remove containerd -y
# wget https://github.com/containerd/containerd/releases/download/v1.7.16/containerd-1.7.16-linux-amd64.tar.gz
# tar -zxvf containerd-1.7.16-linux-amd64.tar.gz
# mv bin/* /usr/local/bin/
[*] 编写 service 文件
# vi /usr/lib/systemd/system/containerd.service
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNPROC=infinity
LimitCORE=infinity
# Comment TasksMax if your systemd version does not supports it.
# Only systemd 226 and above support this version.
TasksMax=infinity
OOMScoreAdjust=-999
WantedBy=multi-user.target
[*] 修改配置文件
# mkdir /etc/containerd/
# containerd config default > /etc/containerd/config.toml
# 将cgroup打开
# vi /etc/containerd/config.toml
# 找到这一行配置，将false改为true
139 SystemdCgroup = true
# 修改sandbox镜像地址
67 sandbox_image = "registry.aliyuncs.com/google_containers/pause:3.9"
[*] 启动服务
# systemctl daemon-reload
# systemctl enable --now containerd
2、安装 cni 插件
# wget https://github.com/containernetworking/plugins/releases/download/v1.4.1/cni-plugins-linux-amd64-v1.4.1.tgz
# mkdir -p /opt/cni/bin
# tar Cxzvf /opt/cni/bin cni-plugins-linux-amd64-v1.4.1.tgz
3、主机配置
# hostnamectl set-hostname master-1
# echo "127.0.0.1 master-1" >> /etc/hosts
# echo "::1 master-1" >>/etc/hosts
# modprobe bridge
# modprobe br_netfilter
# vi /etc/sysctl.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
# sysctl -p
# setenforce 0
# sed -i 's/^SELINUX=enforcing$/SELINUX=disabled/' /etc/selinux/config
# systemctl disable --now firewalld
# swapoff -a
https://i-blog.csdnimg.cn/direct/007b9f2f581d4101a4baba3966705d6c.png
4、搭建 K8s
[*] 配置 yum 源
# sed -i "s/openEuler-22.03-LTS-SP1/openEuler-23.03/g" /etc/yum.repos.d/openEuler.repo
[*] yum 安装
# yum install kubernet* cri-tools-y
# systemctl enable kubelet
[*] cri 配置
# crictl config --set runtime-endpoint=unix:///run/containerd/containerd.sock --set image-endpoint=unix:///run/containerd/containerd.sock
[*] 检察版本并初始化
# kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"24", GitVersion:"v1.24.0", GitCommit:"4ce5a8954017644c5420bae81d72b09b735c21f0", GitTreeState:"archive", BuildDate:"2023-03-28T11:09:13Z", GoVersion:"go1.19.4", Compiler:"gc", Platform:"linux/amd64"}
# kubeadm init --kubernetes-version=v1.24.0 --pod-network-cidr=10.244.0.0/16 --image-repository=registry.aliyuncs.com/google_containers
[*] 按照提示信息操纵
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
[*] 检察节点状态
# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master-1 NotReady control-plane 14m v1.24.0
5、网络插件安装
[*] 下载 flannel yml
# wget https://github.com/flannel-io/flannel/releases/download/v0.26.2/kube-flannel.yml
[*] 通过离线下载网站获取镜像
https://pull.7ii.win/
[*] 导入 k8s.io 命名空间，需要通过 docker 进行转换
# docker load < flannel-flannel-v0.26.2-amd64.tar
# docker load < flannel-flannel-cni-plugin-v1.6.0-flannel1-amd64.tar
# docker save -o flannel-flannel-cni-plugin-v1.6.0-flannel1-amd64.tar flannel/flannel-cni-plugin:v1.6.0-flannel1
# docker save -o flannel-flannel-v0.26.2-amd64.tar flannel/flannel:v0.26.2
# ctr -n k8s.io images import flannel-flannel-v0.26.2-amd64.tar
# ctr -n k8s.io images import flannel-flannel-cni-plugin-v1.6.0-flannel1-amd64.tar
[*] 调整 yml 镜像拉取战略，在 image 下增长 imagePullPolicy: Never
https://i-blog.csdnimg.cn/direct/e3fee56002734416897a0b6e4bb6d9fd.png
[*] 应用 yml
# kubectl apply -f kube-flannel.yml
[*] yml 参考
apiVersion: v1
kind: Namespace
metadata:
labels:
k8s-app: flannel
pod-security.kubernetes.io/enforce: privileged
name: kube-flannel
---
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: flannel
name: flannel
namespace: kube-flannel
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: flannel
name: flannel
rules:
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- apiGroups:
- ""
resources:
- nodes
verbs:
- get
- list
- watch
- apiGroups:
- ""
resources:
- nodes/status
verbs:
- patch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: flannel
name: flannel
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: flannel
subjects:
- kind: ServiceAccount
name: flannel
namespace: kube-flannel
---
apiVersion: v1
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",
"EnableNFTables": false,
"Backend": {
"Type": "vxlan"
}
}
kind: ConfigMap
metadata:
labels:
app: flannel
k8s-app: flannel
tier: node
name: kube-flannel-cfg
namespace: kube-flannel
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
labels:
app: flannel
k8s-app: flannel
tier: node
name: kube-flannel-ds
namespace: kube-flannel
spec:
selector:
matchLabels:
app: flannel
k8s-app: flannel
template:
metadata:
labels:
app: flannel
k8s-app: flannel
tier: node
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/os
operator: In
values:
- linux
containers:
- args:
- --ip-masq
- --kube-subnet-mgr
command:
- /opt/bin/flanneld
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
- name: EVENT_QUEUE_DEPTH
value: "5000"
image: docker.io/flannel/flannel:v0.26.2
imagePullPolicy: Never
name: kube-flannel
resources:
requests:
cpu: 100m
memory: 50Mi
securityContext:
capabilities:
add:
- NET_ADMIN
- NET_RAW
privileged: false
volumeMounts:
- mountPath: /run/flannel
name: run
- mountPath: /etc/kube-flannel/
name: flannel-cfg
- mountPath: /run/xtables.lock
name: xtables-lock
hostNetwork: true
initContainers:
- args:
- -f
- /flannel
- /opt/cni/bin/flannel
command:
- cp
image: docker.io/flannel/flannel-cni-plugin:v1.6.0-flannel1
imagePullPolicy: Never
name: install-cni-plugin
volumeMounts:
- mountPath: /opt/cni/bin
name: cni-plugin
- args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
command:
- cp
image: docker.io/flannel/flannel:v0.26.2
imagePullPolicy: Never
name: install-cni
volumeMounts:
- mountPath: /etc/cni/net.d
name: cni
- mountPath: /etc/kube-flannel/
name: flannel-cfg
priorityClassName: system-node-critical
serviceAccountName: flannel
tolerations:
- effect: NoSchedule
operator: Exists
volumes:
- hostPath:
path: /run/flannel
name: run
- hostPath:
path: /opt/cni/bin
name: cni-plugin
- hostPath:
path: /etc/cni/net.d
name: cni
- configMap:
name: kube-flannel-cfg
name: flannel-cfg
- hostPath:
path: /run/xtables.lock
type: FileOrCreate
name: xtables-lock
6、安装结果
# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master-1 Ready control-plane 7m38s v1.24.0
#
#
# kubectl get pods -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-flannel kube-flannel-ds-rtwp4 1/1 Running 0 98s
kube-system coredns-74586cf9b6-cdr5n 1/1 Running 0 7m22s
kube-system coredns-74586cf9b6-hhn72 1/1 Running 0 7m22s
kube-system etcd-master-1 1/1 Running 0 7m36s
kube-system kube-apiserver-master-1 1/1 Running 0 7m36s
kube-system kube-controller-manager-master-1 1/1 Running 0 7m36s
kube-system kube-proxy-27tnv 1/1 Running 0 7m22s
kube-system kube-scheduler-master-1 1/1 Running 0 7m36s
参考
解决无法拉取flannel镜像：https://blog.csdn.net/qq_46274911/article/details/138486623
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