k8s集群搭建+calico系列1之kubeadm部署
kubeadm+calico部署k8s集群一、配置需求最低配置推荐配置master:2C4G ;node:4C16G节点都是4C16G操作系统内核3.10及以上centos7.7docker-ce-18.03docker-ce-18.06或18.09注：如果对于初学者使用虚拟机内存配置在小点也可以，但是最好最少2G内存。二、安装部署...
kubeadm+calico部署k8s集群
一、配置需求
| 最低配置 | 推荐配置 |
|---|---|
| master:2C4G ;node:4C16G | 节点都是4C16G |
| 操作系统内核3.10及以上 | centos7.7 |
| docker-ce-18.03 | docker-ce-18.06或18.09 |
- 注：如果对于初学者使用虚拟机内存配置在小点也可以，但是最好最少2G内存。
二、安装部署
所有节点配置：
1.修改主机名称和配置hosts
vim /etc/hostname
master01
vim /etc/hostname
node01
vim /etc/hosts
192.168.1.112 master01
192.168.1.113 node01
2.免密设置
ssh-keygen
ssh-copy-id master01
ssh-copy-id node01
3.安装必要软件以及升级所有软件
yum -y install vim-enhanced wget curl net-tools conntrack-tools bind-utils socat ipvsadm ipset
4.关闭防火墙设置iptables
systemctl disable firewalld && systemctl stop firewalld
iptables -F && iptables -X && iptables -Z && iptables -L && systemctl stop iptables && systemctl status iptables
5.关闭selinux、swap
setenforce 0
sed -i " s/SELINUX=enforcing/SELINUX=disabled/g " /etc/selinux/config
swapoff -a
vim /etc/fstab
#/dev/mapper/centos-swap swap swap defaults 0 0
6.内核参数优化
vim /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
vm.swappiness=0
modprobe br_netfilter
sysctl -p /etc/sysctl.d/k8s.conf
7.安装docker-ce
配置阿里云yum源：
wget -O /etc/yum.repos.d/CentOS7-Aliyun.repo http://mirrors.aliyun.com/repo/Centos-7.repo
安装docker源：
cd /etc/yum.repos.d && wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
查看docker-ce的可用资源
yum list docker-ce.x86_64 --showduplicates | sort -r
安装指定版本的docker
yum install docker-ce-18.06.3.ce-3.el7 -y
启动docker
systemctl enable docker && systemctl start docker
设置docker的cgroupdriver
vim /etc/docker/daemon.json
{
"registry-mirrors":["https://5twf62k1.mirror.aliyuncs.com"],
"exec-opts":["native.cgroupdriver=systemd"]
}
重启docker
systemctl daemon-reload && systemctl restart docker
查看docker信息
docker info
docker info |grep Cgroup
8.拉取镜像(master节点)
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.18.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.18.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.18.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.18.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.2
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.4.3-0
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.6.7
拉取calico镜像：
docker pull calico/node:v3.13.2
docker pull calico/cni:v3.13.2
docker pull calico/pod2daemon-flexvol:v3.13.2
docker pull calico/kube-controllers:v3.13.2
通过以下命令对本地镜像进行重命名，使之与kubeadm要求的镜像名一致
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.18.3 k8s.gcr.io/kube-apiserver:v1.18.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.18.3 k8s.gcr.io/kube-controller-manager:v1.18.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.18.3 k8s.gcr.io/kube-scheduler:v1.18.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.18.3 k8s.gcr.io/kube-proxy:v1.18.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.2 k8s.gcr.io/pause:3.2
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.4.3-0 k8s.gcr.io/etcd:3.4.3-0
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.6.7 k8s.gcr.io/coredns:1.6.7
删除镜像
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.18.3
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.18.3
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.18.3
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.18.3
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.6.7
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.2
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.4.3-0
docker images
9.安装kubernetes
安装kubernetes初始化工具(所有节点)
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
这里要update一下，否则不生效，
执行
yum update(刚执行一点然后ctrl+c终止，也可以一直update)
yum list kubeadm --showduplicates | sort -r
yum install kubeadm-1.18.3-0 kubelet-1.18.3-0 kubectl-1.18.3-0 -y
master节点：
使用kubeadm 配置文件模板
kubeadm config print init-defaults > init_default.yaml
修改init_default.yaml文件中内容使其与当前部署版本一致
找到对应配置，修改为以下对应内容：
vim init_default.yaml
localAPIEndpoint:
advertiseAddress: 192.168.1.112 (master01的主机IP)
bindPort: 6443
…
imageRepository: k8s.gcr.io (仓库地址)
kind: ClusterConfiguration
kubernetesVersion: v1.18.3 (当前k8s版本)
networking:
dnsDomain: cluster.local
执行如下命令查看kubeadm配置后对应镜像版本
kubeadm config images list --config init_default.yaml
k8s.gcr.io/kube-apiserver:v1.18.3
k8s.gcr.io/kube-controller-manager:v1.18.3
k8s.gcr.io/kube-scheduler:v1.18.3
k8s.gcr.io/kube-proxy:v1.18.3
k8s.gcr.io/pause:3.2
k8s.gcr.io/etcd:3.4.3-0
k8s.gcr.io/coredns:1.6.7
kubeadm初始化
所有节点执行这一行命令：
systemctl enable kubelet.service
master节点执行：
执行以下命令进行kubeadm初始化
kubeadm init --config=init_default.yaml
[root@master01 ~]# kubeadm init --config=init_default.yaml
W1024 18:29:24.760362 26930 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
[init] Using Kubernetes version: v1.18.3
[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'
[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
[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 [master01 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 192.168.1.112]
[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 [master01 localhost] and IPs [192.168.1.112 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [master01 localhost] and IPs [192.168.1.112 127.0.0.1 ::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
[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"
W1024 18:29:33.938015 26930 manifests.go:225] the default kube-apiserver authorization-mode is "Node,RBAC"; using "Node,RBAC"
[control-plane] Creating static Pod manifest for "kube-scheduler"
W1024 18:29:33.938733 26930 manifests.go:225] the default kube-apiserver authorization-mode is "Node,RBAC"; using "Node,RBAC"
[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 25.511480 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config-1.18" 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 master01 as control-plane by adding the label "node-role.kubernetes.io/master=''"
[mark-control-plane] Marking the node master01 as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule]
[bootstrap-token] Using token: abcdef.0123456789abcdef
[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
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 192.168.1.112:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:1c6bd285abde47e50f25e8f0ff94951355b19948955a7bbfb5e6ce77aa3bc1b9
请备份好kubeadm init输出中的 kubeadm join 命令，后面需要这个命令来给集群添加节点
kubeadm join 192.168.1.112:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:1c6bd285abde47e50f25e8f0ff94951355b19948955a7bbfb5e6ce77aa3bc1b9
执行以下命令：
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
查看当前mater状态
[root@master01 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master01 NotReady master 9m29s v1.18.3
node部署：还记得备份的 kubeadm join
node节点执行：
拉取镜像：
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.18.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.2
docker pull calico/node:v3.13.2
docker pull calico/pod2daemon-flexvol:v3.13.2
修改镜像名称
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.18.3 k8s.gcr.io/kube-proxy:v1.18.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.2 k8s.gcr.io/pause:3.2
删除镜像
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.18.3
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.2
加入节点
kubeadm join 192.168.1.112:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:1c6bd285abde47e50f25e8f0ff94951355b19948955a7bbfb5e6ce77aa3bc1b9
主节点查看
[root@master01 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master01 NotReady master 11m v1.18.3
node01 NotReady <none> 14s v1.18.3
注意这里的STATUS是NotReady，这是因为网络还没有部署好，部署好网络后状态变为Ready。
10.网络calico部署
通过以下命令获取官方calico配置文件
curl https://docs.projectcalico.org/archive/v3.13/manifests/calico.yaml -O
修改calico文件
vim calico.yaml
修改calico.yaml中对应配置,使配置文件中镜像名称与本地镜像一致
# It can be deleted if this is a fresh installation, or if you have already
# upgraded to use calico-ipam.
- name: upgrade-ipam
image: calico/cni:v3.13.2 (保持与拉取镜像仓库地址一致)
--
# This container installs the CNI binaries
# and CNI network config file on each node.
- name: install-cni
image: calico/cni:v3.13.2 (保持与拉取镜像仓库地址一致)
--
# Adds a Flex Volume Driver that creates a per-pod Unix Domain Socket to allow Dikastes
# to communicate with Felix over the Policy Sync API.
- name: flexvol-driver
image: calico/pod2daemon-flexvol:v3.13.2 (保持与拉取镜像仓库地址一致)
--
# container programs network policy and routes on each
# host.
- name: calico-node
image: calico/node:v3.13.2 (保持与拉取镜像仓库地址一致)
--
priorityClassName: system-cluster-critical
containers:
- name: calico-kube-controllers
image: calico/kube-controllers:v3.13.2 (保持与拉取镜像仓库地址一致)
执行部署操作
[root@master01 ~]# kubectl create -f calico.yaml
configmap/calico-config created
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
daemonset.apps/calico-node created
serviceaccount/calico-node created
deployment.apps/calico-kube-controllers created
serviceaccount/calico-kube-controllers created
查看pod信息
[root@master01 ~]# kubectl get pods --all-namespaces -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system calico-kube-controllers-555fc8cc5c-vp54b 1/1 Running 0 55s 192.168.241.67 master01 <none> <none>
kube-system calico-node-pbwv8 1/1 Running 0 55s 192.168.1.112 master01 <none> <none>
kube-system calico-node-xllrv 0/1 Init:0/3 0 55s 192.168.1.113 node01 <none> <none>
kube-system coredns-66bff467f8-bfkd7 1/1 Running 0 27m 192.168.241.65 master01 <none> <none>
kube-system coredns-66bff467f8-qc6cw 1/1 Running 0 27m 192.168.241.66 master01 <none> <none>
kube-system etcd-master01 1/1 Running 0 27m 192.168.1.112 master01 <none> <none>
kube-system kube-apiserver-master01 1/1 Running 0 27m 192.168.1.112 master01 <none> <none>
kube-system kube-controller-manager-master01 1/1 Running 0 27m 192.168.1.112 master01 <none> <none>
kube-system kube-proxy-dqtvt 1/1 Running 0 27m 192.168.1.112 master01 <none> <none>
kube-system kube-proxy-t986s 0/1 ContainerCreating 0 16m 192.168.1.113 node01 <none> <none>
kube-system kube-scheduler-master01 1/1 Running 0 27m 192.168.1.112 master01 <none> <none>
现在看到 READY STATUS 还不是全部为1和Running，等几分钟再看，如果全部为1和Running就是部署成功。
[root@master01 ~]# kubectl get pods --all-namespaces -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system calico-kube-controllers-555fc8cc5c-b6pvw 1/1 Running 0 8m38s 192.168.241.65 master01 <none> <none>
kube-system calico-node-chnqf 1/1 Running 0 8m38s 192.168.1.112 master01 <none> <none>
kube-system calico-node-s7k9g 1/1 Running 0 8m38s 192.168.1.113 node01 <none> <none>
kube-system coredns-66bff467f8-bfkd7 1/1 Running 2 20h 192.168.241.68 master01 <none> <none>
kube-system coredns-66bff467f8-qc6cw 1/1 Running 2 20h 192.168.241.70 master01 <none> <none>
kube-system etcd-master01 1/1 Running 4 20h 192.168.1.112 master01 <none> <none>
kube-system kube-apiserver-master01 1/1 Running 4 20h 192.168.1.112 master01 <none> <none>
kube-system kube-controller-manager-master01 1/1 Running 1 20h 192.168.1.112 master01 <none> <none>
kube-system kube-proxy-dqtvt 1/1 Running 1 20h 192.168.1.112 master01 <none> <none>
kube-system kube-proxy-t986s 1/1 Running 0 20h 192.168.1.113 node01 <none> <none>
kube-system kube-scheduler-master01 1/1 Running 1 20h 192.168.1.112 master01 <none> <none>
这时再查看nodes:状态全部为Ready
[root@master01 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master01 Ready master 20h v1.18.3
node01 Ready <none> 20h v1.18.3
到此集群就部署完成了。接下来下节我们创建一个小的示例。
三、部署过程问题汇总
1.kubectl get pods --all-namespaces -o wide
kube-system kube-proxy-t986s 0/1 ContainerCreating 0 20h 192.168.1.113 node01 <none> <none>
发现这里的状态一直都是ContainerCreating，查看pod的详细信息：
kubectl describe pod kube-proxy-t986s -n kube-system
Warning FailedCreatePodSandBox 20h (x71 over 20h) kubelet, node01 Failed to create pod sandbox: rpc error: code = Unknown desc = failed pulling image "k8s.gcr.io/pause:3.2": Error response from daemon: Get https://k8s.gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
通过信息k8s.gcr.io/pause:3.2可知道是node节点拉取不到这个镜像，这个一般都是获取不了的，所以我们要换成是国内的网络，解决方式如下：在node节点执行
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.18.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.2
docker pull calico/node:v3.13.2
docker pull calico/pod2daemon-flexvol:v3.13.2
修改镜像名称
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.18.3 k8s.gcr.io/kube-proxy:v1.18.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.2 k8s.gcr.io/pause:3.2
重置node节点
kubeadm reset
重新添加
kubeadm join 192.168.1.112:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:1c6bd285abde47e50f25e8f0ff94951355b19948955a7bbfb5e6ce77aa3bc1b9
重新查看状态变为Running。
2.pod状态一直处于Pending
[root@master01 ~]# kubectl get pods --all-namespaces -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system coredns-66bff467f8-cm85k 0/1 Pending 0 13m <none> <none> <none> <none>
kube-system coredns-66bff467f8-rlzn2 0/1 Pending 0 13m <none> <none> <none> <none>
查看详细：
kubectl describe pod coredns-66bff467f8-rlzn2 -n kube-system
oS Class: Burstable
Node-Selectors: kubernetes.io/os=linux
Tolerations: CriticalAddonsOnly
node-role.kubernetes.io/master:NoSchedule
node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
Warning FailedScheduling 62s (x13 over 13m) default-scheduler 0/1 nodes are available: 1 node(s) had taint {node.kubernetes.io/not-ready: }, that the pod didn’t tolerate.
解决方法：允许master节点部署
kubectl taint nodes --all node-role.kubernetes.io/master-
kubectl taint nodes --all node.kubernetes.io/not-ready-
kubectl get pods --all-namespaces -o wide
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