k8s的安装部署
kubernetes 是 k8s的全称k8s是用来管理容器的，可以用来管理容器的，可以用来部署，扩缩，管理容器有代码的地方就可以有k8s
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目录
2、关闭firewalld和selinux（在k8s集群master和node上都进行操作）
k8s是什么？有什么作用？
kubernetes 是 k8s的全称
k8s是用来管理容器的，可以用来管理容器的，可以用来部署，扩缩，管理容器
有代码的地方就可以有k8s
容器运行时软件：
管理容器从创建，启动，关闭，镜像相关的操作的软件
docker
coreos
CNCF是什么？
k8s里面有哪些组件？
从角色上来讲的话：master（管理节点）和node（工作节点）
master上的control plane 组件：
1、kube-apiserver
组件：就是一个pod，pod里面有很多的容器，运行相关的软件，会有相应的docker镜像文件
API服务器时Kubernetes 控制平面的组件，该组件负责公开了kubernetes API，负责处理接受请求的工作，api服务器时Kubernetes 控制平面的前端
k8s的入口，通过这个接口可以了解整个k8s的信息和资源
2、etcd：高可用的键值数据库，保存Kubernetes所有集群数据的后台数据库
3、scheduler 调度器：负责监视新创建的，未指定运行节点（node）的pods，并选择节点来让Pod在上面运行
pod：是k8s里最小的计算单元，里面可以包含很多的容器，所有的容器共享一个ip地址
4、controller-manager 控制器的管理创新
k8s有很多的控制器
deployment 部署pod的控制器
replicaSET 副本控制器
5、cloud-controller-manager
一个Kubernetes 控制平面组件，嵌入了特定于云平台的控制逻辑，云控制器管理器（cloud controller Manager）允许你将你的集群连接到云提供商的API之上，并将于该平台交互的组件同与你的集群交互的组件分离开来
Node组件
1、kubelet 会在集群中每个节点（node）上运行，它保证容器（containers）都运行在pod中，启动pod会在node节点服务器上
2、kube-proxy 维护节点上的一些网络规则，这些网络规则会允许从集群内部或外部的网络会话与pod进行网络通信
网络通信：多个node之间的网络通信，负载均衡
k8s的使用
pod
pv
pvc
控制器
hpa
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k8s架构图
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k8s的安装部署
1、minikube
2、kubeadm k8s官方推荐的安装k8s的方式
3、二进制安装
4、第3方的部署工具：rancher等
k8s集群的架构
1、单master和多node
2、多master和多node -- 高可用
3master 3node 1个负载均衡（nginx）
实验环境
1台master，3台node
软件：centos7.9 docker
硬件：2G/2c
1、IP地址规划：
k8s-master：192.168.44.210
k8s-node1:192.168.44.211
k8s-node2:192.168.44.212
k8s-node3:192.168.44.213
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2、关闭firewalld和selinux（在k8s集群master和node上都进行操作）
[root@k8s-master ~]# service firewalld stop
Redirecting to /bin/systemctl stop firewalld.service
[root@k8s-master ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@k8s-master ~]# setenforce 0
[root@k8s-master ~]# getenforce
Permissive
#############################################################################
3、在所有机器上安装docker
安装yum相关工具，下载docker-ce.repo文件
yum install -y yum-utilsyum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo安装docker-ce软件
yum install docker-ce docker-ce-cli containerd.io docker-compose-plugin -y
启动docker服务，设置docker开机自启
[root@k8s-master yum.repos.d]# systemctl start docker
[root@k8s-master yum.repos.d]# ps aux|grep docker
root 11877 6.1 2.6 1027340 48624 ? Ssl 17:35 0:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
root 12001 0.0 0.0 112824 976 pts/0 S+ 17:35 0:00 grep --color=auto docker
[root@k8s-master yum.repos.d]# systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@k8s-master yum.repos.d]#
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4、关闭交换分区
[root@k8s-master yum.repos.d]# swapoff -a
[root@k8s-master yum.repos.d]# free -m
total used free shared buff/cache available
Mem: 1819 298 779 9 741 1354
Swap: 0 0 0
[root@k8s-master yum.repos.d]#
#############################################################################
5、重新命名主机名，并修改hosts文件
[root@k8s-master yum.repos.d]# cat >> /etc/hosts << EOF
> 192.168.44.210 k8s-master
> 192.168.44.211 k8s-node1
> 192.168.44.212 k8s-node2
> 192.168.44.213 k8s-node3
> EOF
#############################################################################
6、修改一些内核参数
[root@k8s-master yum.repos.d]# cat <<EOF >> /etc/sysctl.conf
> net.bridge.bridge-nf-call-ip6tables = 1
> net.bridge.bridge-nf-call-iptables = 1
> net.ipv4.ip_nonlocal_bind = 1
> net.ipv4.ip_forward = 1
> vm.swappiness=0
> EOF
sysctl -p 让参数生效到内核里面
[root@k8s-master yum.repos.d]# sysctl -p
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.ip_forward = 1
vm.swappiness = 0
#############################################################################
7、安装kubadm，kubctl，kublet软件
添加kubernetes yum软件源
[root@k8s-master ~]# 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=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
> EOF
安装kubeadm，kubelet，kubectl，并且指定版本，因为1.24的版本默认运行时环境不是docker了
yum install -y kubelet-1.23.6 kubeadm-1.23.6 kubectl-1.23.6设置开机自启，因为kubelet是k8s在node节点上的代理，必须开机要运行的
[root@k8s-master ~]# systemctl enable kubelet
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
#############################################################################
8、部署kubernetes master
提前准备coredns:1.8.4的镜像，后面需要使用,需要在每台机器上下载镜像
[root@k8s-master ~]# docker pull coredns/coredns:1.8.4
1.8.4: Pulling from coredns/coredns
c6568d217a00: Pull complete
bc38a22c706b: Pull complete
Digest: sha256:6e5a02c21641597998b4be7cb5eb1e7b02c0d8d23cce4dd09f4682d463798890
Status: Downloaded newer image for coredns/coredns:1.8.4
docker.io/coredns/coredns:1.8.4
[root@k8s-master ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
coredns/coredns 1.8.4 8d147537fb7d 16 months ago 47.6MB
[root@k8s-master ~]# docker tag coredns/coredns:1.8.4 registry.aliyuncs.com/google_containers/coredns:v1.8.4
[root@k8s-master ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
coredns/coredns 1.8.4 8d147537fb7d 16 months ago 47.6MB
registry.aliyuncs.com/google_containers/coredns v1.8.4 8d147537fb7d 16 months ago 47.6MB
在master服务器上进行初始化操作
[root@k8s-master ~]# kubeadm init \
> --apiserver-advertise-address=192.168.44.210 \
> --image-repository registry.aliyuncs.com/google_containers \
> --service-cidr=10.1.0.0/16 \
> --pod-network-cidr=10.244.0.0/16
I0924 22:36:57.310381 20845 version.go:255] remote version is much newer: v1.25.2; falling back to: stable-1.23
[init] Using Kubernetes version: v1.23.12
[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-master kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.1.0.1 192.168.44.210]
[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-master localhost] and IPs [192.168.44.210 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [k8s-master localhost] and IPs [192.168.44.210 127.0.0.1 ::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 7.503688 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config-1.23" in namespace kube-system with the configuration for the kubelets in the cluster
NOTE: The "kubelet-config-1.23" naming of the kubelet ConfigMap is deprecated. Once the UnversionedKubeletConfigMap feature gate graduates to Beta the default name will become just "kubelet-config". Kubeadm upgrade will handle this transition transparently.
[upload-certs] Skipping phase. Please see --upload-certs
[mark-control-plane] Marking the node k8s-master 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-master as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule]
[bootstrap-token] Using token: 0xp3gm.wzbsahhxwa1dtaeh
[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 192.168.44.210:6443 --token 0xp3gm.wzbsahhxwa1dtaeh \
--discovery-token-ca-cert-hash sha256:bc28a61b1de3bfa7cb95c619ef050fe67238471347b16d9e34e400e405efe0bb
[root@k8s-master ~]#
完成初始化的新建文件和目录的操作，在master上完成
[root@k8s-master ~]# mkdir -p $HOME/.kube
[root@k8s-master ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@k8s-master ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config
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9、将node节点服务器加入k8s集群
在三台node节点服务器上都执行
[root@k8s-node1 ~]# kubeadm join 192.168.44.210:6443 --token 0xp3gm.wzbsahhxwa1dtaeh --discovery-token-ca-cert-hash sha256:bc28a61b1de3bfa7cb95c619ef050fe67238471347b16d9e34e400e405efe0bb
[preflight] Running pre-flight checks
[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.
[root@k8s-node2 ~]# kubeadm join 192.168.44.210:6443 --token 0xp3gm.wzbsahhxwa1dtaeh --discovery-token-ca-cert-hash sha256:bc28a61b1de3bfa7cb95c619ef050fe67238471347b16d9e34e400e405efe0bb
[preflight] Running pre-flight checks
[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.
[root@k8s-node3 ~]# kubeadm join 192.168.44.210:6443 --token 0xp3gm.wzbsahhxwa1dtaeh --discovery-token-ca-cert-hash sha256:bc28a61b1de3bfa7cb95c619ef050fe67238471347b16d9e34e400e405efe0bb
[preflight] Running pre-flight checks
[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.
在master上查看node节点信息
[root@k8s-master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master NotReady control-plane,master 11m v1.23.6
k8s-node1 NotReady <none> 3m49s v1.23.6
k8s-node2 NotReady <none> 100s v1.23.6
k8s-node3 NotReady <none> 96s v1.23.6
NotReady 说明master和node节点之间的通信还是有问题的，容器之间通信还没有准备好
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10.安装网络插件flannel(在master节点执行)
k8s的网络插件：作用就是实现不同宿主机之间pod的通信
1、flannel --》overlay --》vxlan
2、calico --》 ipip BGP
kube-flannel.yaml 文件需要自己去创建，内容如下：
---
kind: Namespace
apiVersion: v1
metadata:
name: kube-flannel
labels:
pod-security.kubernetes.io/enforce: privileged
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: flannel
rules:
- 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-flannel
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: flannel
namespace: kube-flannel
---
kind: ConfigMap
apiVersion: v1
metadata:
name: kube-flannel-cfg
namespace: kube-flannel
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-flannel
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: flannelcni/flannel-cni-plugin:v1.1.0 for ppc64le and mips64le (dockerhub limitations may apply)
image: docker.io/rancher/mirrored-flannelcni-flannel-cni-plugin:v1.1.0
command:
- cp
args:
- -f
- /flannel
- /opt/cni/bin/flannel
volumeMounts:
- name: cni-plugin
mountPath: /opt/cni/bin
- name: install-cni
#image: flannelcni/flannel:v0.19.1 for ppc64le and mips64le (dockerhub limitations may apply)
image: docker.io/rancher/mirrored-flannelcni-flannel:v0.19.1
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: flannelcni/flannel:v0.19.1 for ppc64le and mips64le (dockerhub limitations may apply)
image: docker.io/rancher/mirrored-flannelcni-flannel:v0.19.1
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
- 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
部署flannel
[root@k8s-master ~]# kubectl apply -f kube-flannel.yml
Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+
podsecuritypolicy.policy/psp.flannel.unprivileged created
clusterrole.rbac.authorization.k8s.io/flannel created
clusterrolebinding.rbac.authorization.k8s.io/flannel created
serviceaccount/flannel created
configmap/kube-flannel-cfg created
daemonset.apps/kube-flannel-ds created
查看集群状态（状态为Ready就代表k8s部署成功）
[root@k8s-master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master Ready control-plane,master 21m v1.23.6
k8s-node1 Ready <none> 20m v1.23.6
k8s-node2 Ready <none> 20m v1.23.6
k8s-node3 Ready <none> 20m v1.23.6
查看各个节点详细信息
[root@k8s-master ~]# kubectl get pod -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-6d8c4cb4d-92g7b 1/1 Running 0 20m
coredns-6d8c4cb4d-kl4q5 1/1 Running 0 20m
etcd-k8s-master 1/1 Running 0 20m
kube-apiserver-k8s-master 1/1 Running 0 20m
kube-controller-manager-k8s-master 1/1 Running 0 20m
kube-proxy-422b5 1/1 Running 0 19m
kube-proxy-6qpcz 1/1 Running 0 19m
kube-proxy-ggnnt 1/1 Running 0 20m
kube-proxy-vjcnc 1/1 Running 0 19m
kube-scheduler-k8s-master 1/1 Running 0 20m
查看k8s里的命名空间有哪些（k8s自己创建的）
[root@k8s-master ~]# kubectl get ns
NAME STATUS AGE
default Active 22m
kube-flannel Active 10m
kube-node-lease Active 22m
kube-public Active 22m
kube-system Active 22m
查看pod运行在哪个node上，
[root@k8s-master ~]# kubectl get pod -n kube-flannel
NAME READY STATUS RESTARTS AGE
kube-flannel-ds-c7crw 1/1 Running 0 29m
kube-flannel-ds-pr5pr 1/1 Running 0 29m
kube-flannel-ds-rphnc 1/1 Running 0 29m
kube-flannel-ds-v8rxz 1/1 Running 0 29m
[root@k8s-master ~]# kubectl get pod -n kube-flannel -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-flannel-ds-c7crw 1/1 Running 0 29m 192.168.44.211 k8s-node1 <none> <none>
kube-flannel-ds-pr5pr 1/1 Running 0 29m 192.168.44.212 k8s-node2 <none> <none>
kube-flannel-ds-rphnc 1/1 Running 0 29m 192.168.44.210 k8s-master <none> <none>
kube-flannel-ds-v8rxz 1/1 Running 0 29m 192.168.44.213 k8s-node3 <none> <none>
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