install docker
https://docs.docker.com/engine/install/
添加自动补全
yum -y install bash-completion
source /usr/share/bash-completion/bash_completion
install and configuration harbor
[root@Rocky-Harbor certs]# mkdir -pv /k8s/softwares/certs/{ca,server,client}
[root@Rocky-Harbor certs]# tar -zxvf harbor-offline-installer-v2.9.3.tgz
[root@Rocky-Harbor certs]# openssl genrsa -out ca/ca.key 4096
[root@Rocky-Harbor certs]# openssl req -x509 -new -nodes -sha512 -days 3650 -subj "/C=CN/ST=Beijing/L=Beijing/O=example/OU=Personal/CN=foam.com" -key ca/ca.key -out ca/ca.crt
[root@Rocky-Harbor certs]# openssl req -x509 -new -nodes -sha512 -days 3650 -subj "/C=CN/ST=Beijing/L=Beijing/O=example/OU=Personal/CN=foam.com" -key ca/ca.key -out ca/ca.crt
[root@Rocky-Harbor certs]# openssl genrsa -out server/harbor.foam.com.key 4096
[root@Rocky-Harbor certs]# openssl req -sha512 -new -subj "/C=CN/ST=Beijing/L=Beijing/O=example/OU=Personal/CN=harbor.foam.com" -key server/harbor.foam.com.key -out server/harbor.foam.com.csr
[root@Rocky-Harbor certs]# cat > v3.ext > /etc/hosts
[root@Rocky-Harbor harbor]# echo alias yy='egrep -v "^.*#|^$"' >> /root/.bashrc
[root@Rocky-Harbor harbor]# source /root/.bashrc
# harbor configuration
hostname: harbor.foam.com
http:
port: 80
https:
port: 443
certificate: /k8s/softwares/certs/server/harbor.foam.com.crt
private_key: /k8s/softwares/certs/server/harbor.foam.com.key
harbor_admin_password: foam
[root@Rocky-Harbor harbor]# ./install
[root@Rocky-Harbor harbor]# docker login -u admin -p foam harbor.foam.com
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
[root@Rocky-Harbor harbor]# docker logout harbor.foam.com
[root@Rocky-Harbor harbor]# scp /k8s/softwares/certs/client/* 192.168.100.15:/etc/docker/certs.d/harbor.foam.com
[root@Rocky-Harbor harbor]# scp /k8s/softwares/certs/client/* 192.168.100.7:/etc/docker/certs.d/harbor.foam.com
[root@Rocky-Harbor harbor]# scp /k8s/softwares/certs/client/* 192.168.100.8:/etc/docker/certs.d/harbor.foam.com
install kubernetes
# All Node and install docker
[root@Rocky-kubernetes-control ~]# swapoff -a && sysctl -w vm.swappiness=0
[root@Rocky-kubernetes-control ~]# sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab
[root@Rocky-kubernetes-control ~]# ifconfig eth0 | grep ether | awk '{print $2}'
[root@Rocky-kubernetes-control ~]# cat > /etc/modules-load.d/k8s.conf /etc/sysctl.d/k8s.conf /etc/yum.repos.d/kubernetes.repo
使用 kubeadm 初始化集群时,可能会出现如下的输出信息
[init]
使用初始化的K8S版本。
[preflight]
主要是做安装K8S集群的前置工作,比如下载镜像,这个时间取决于你的网速。
[certs]
生成证书文件,默认存储在"/etc/kubernetes/pki"目录哟。
[kubeconfig]
生成K8S集群的默认配置文件,默认存储在"/etc/kubernetes"目录哟。
[kubelet-start]
启动kubelet,
环境变量默认写入:"/var/lib/kubelet/kubeadm-flags.env"
配置文件默认写入:"/var/lib/kubelet/config.yaml"
[control-plane]
使用静态的目录,默认的资源清单存放在:"/etc/kubernetes/manifests"。
此过程会创建静态Pod,包括"kube-apiserver","kube-controller-manager"和"kube-scheduler"
[etcd]
创建etcd的静态Pod,默认的资源清单存放在:""/etc/kubernetes/manifests"
[wait-control-plane]
等待kubelet从资源清单目录"/etc/kubernetes/manifests"启动静态Pod。
[apiclient]
等待所有的master组件正常运行。
[upload-config]
创建名为"kubeadm-config"的ConfigMap在"kube-system"名称空间中。
[kubelet]
创建名为"kubelet-config-1.22"的ConfigMap在"kube-system"名称空间中,其中包含集群中kubelet的配置
[upload-certs]
跳过此节点,详情请参考”--upload-certs"
[mark-control-plane]
标记控制面板,包括打标签和污点,目的是为了标记master节点。
[bootstrap-token]
创建token口令,例如:"kbkgsa.fc97518diw8bdqid"。
如下图所示,这个口令将来在加入集群节点时很有用,而且对于RBAC控制也很有用处哟。
[kubelet-finalize]
更新kubelet的证书文件信息
[addons]
添加附加组件,例如:"CoreDNS"和"kube-proxy”
Configure all worker nodes to join the k8s cluster
[root@Rocky-kubernetes-node1 ~]# kubeadm join 192.168.100.15:6443 --token bin8u5.8y2qs46aloky5x8h
--discovery-token-ca-cert-hash sha256:061796f7364225699fc031e8df29a0659e18c716a5209a331efa3ae7b7c91b65
[preflight] Running pre-flight checks
[WARNING SystemVerification]: this Docker version is not on the list of validated versions: 25.0.3. Latest validated version: 20.10
[WARNING Hostname]: hostname "rocky-kubernetes-node1" could not be reached
[WARNING Hostname]: hostname "rocky-kubernetes-node1": lookup rocky-kubernetes-node1 on 192.168.100.2:53: no such host
[WARNING Service-Kubelet]: kubelet service is not enabled, please run 'systemctl enable kubelet.service'
[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.
# View existing nodes
[root@Rocky-kubernetes-control ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
rocky-kubernetes-control NotReady control-plane,master 11m v1.23.17
rocky-kubernetes-node1 NotReady 104s v1.23.17
rocky-kubernetes-node2 NotReady 104s v1.23.17
[root@Rocky-kubernetes-control ~]# kubectl apply -f kube-flannel.yml
[root@Rocky-kubernetes-control ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
rocky-kubernetes-control Ready control-plane,master 21m v1.23.17
rocky-kubernetes-node1 Ready 12m v1.23.17
rocky-kubernetes-node2 Ready 12m v1.23.17
# Check if the components are functioning properly
[root@Rocky-kubernetes-control ~]# kubectl get pods -A -o wide| grep kube-flannel
kube-flannel kube-flannel-ds-6vd59 1/1 Running 0 5m5s 192.168.100.7 rocky-kubernetes-node1
kube-flannel kube-flannel-ds-c5fdn 1/1 Running 0 5m5s 192.168.100.8 rocky-kubernetes-node2
kube-flannel kube-flannel-ds-dqjgv 1/1 Running 0 5m5s 192.168.100.15 rocky-kubernetes-control
测试网络连通性
[root@Rocky-kubernetes-control ~]# cat > foam-linux85-ds.yaml
linux85-ds-sz6mr 1/1 Running 0 57s 10.100.1.2 rocky-kubernetes-node1
[root@Rocky-kubernetes-control ~]# kubectl exec linux85-ds-sz6mr -- ping -c 3 10.100.2.3
PING 10.100.2.3 (10.100.2.3): 56 data bytes
64 bytes from 10.100.2.3: seq=0 ttl=62 time=1.937 ms
64 bytes from 10.100.2.3: seq=1 ttl=62 time=1.310 ms
64 bytes from 10.100.2.3: seq=2 ttl=62 time=0.772 ms
--- 10.100.2.3 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 0.772/1.339/1.937 ms
[root@Rocky-kubernetes-control ~]# kubectl delete -f foam-linux85-ds.yaml
kubectl TAB
[root@Rocky-kubernetes-control ~]# yum install bash-completion
[root@Rocky-kubernetes-control ~]# source /usr/share/bash-completion/bash_completion
[root@Rocky-kubernetes-control ~]# type _init_completion
[root@Rocky-kubernetes-control ~]# kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl > /dev/null
[root@Rocky-kubernetes-control ~]# sudo chmod a+r /etc/bash_completion.d/kubectl
[root@Rocky-kubernetes-control ~]# echo 'alias k=kubectl' >>~/.bashrc
[root@Rocky-kubernetes-control ~]# echo 'complete -o default -F __start_kubectl k' >>~/.bashrc
[root@Rocky-kubernetes-control ~]# source ~/.bashrc
Kube-flannel file
---
kind: Namespace
apiVersion: v1
metadata:
name: kube-flannel
labels:
k8s-app: flannel
pod-security.kubernetes.io/enforce: privileged
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
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
- apiGroups:
- networking.k8s.io
resources:
- clustercidrs
verbs:
- list
- watch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
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
kind: ServiceAccount
metadata:
labels:
k8s-app: flannel
name: flannel
namespace: kube-flannel
---
kind: ConfigMap
apiVersion: v1
metadata:
name: kube-flannel-cfg
namespace: kube-flannel
labels:
tier: node
k8s-app: flannel
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", # 修改为自己的
"Backend": {
"Type": "vxlan"
}
}
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds
namespace: kube-flannel
labels:
tier: node
app: flannel
k8s-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: docker.io/flannel/flannel-cni-plugin:v1.4.0-flannel1
command:
- cp
args:
- -f
- /flannel
- /opt/cni/bin/flannel
volumeMounts:
- name: cni-plugin
mountPath: /opt/cni/bin
- name: install-cni
image: docker.io/flannel/flannel:v0.24.3
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: docker.io/flannel/flannel:v0.24.3
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
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
- name: EVENT_QUEUE_DEPTH
value: "5000"
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
- name: xtables-lock
mountPath: /run/xtables.lock
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
- name: xtables-lock
hostPath:
path: /run/xtables.lock
type: FileOrCreate
机房租用,北京机房托管,大带宽租用,IDC机房服务器主机租用托管-价格及服务咨询 www.e1idc.net