K8s 安装

发布时间：2023-06-13 13:46:48

环境初始化1：分别在2台主机设置主机名称hostnamectl set-hostname node1hostnamectl set-hostname node22:配置主机映射cat <<EO

环境初始化

1：分别在2台主机设置主机名称

hostnamectl set-hostname node1
hostnamectl set-hostname node2

2:配置主机映射

cat <<EOF > /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.124.129 node1
192.168.124.132 node2
EOF

3：node1上执行ssh免密码登陆配置

ssh-keygen #一路回车即可
ssh-copy-id node2

4：两台主机配置、停防火墙、关闭Swap、关闭Selinux

# 禁用防火墙：
$ systemctl stop firewalld
$ systemctl disable firewalld
# 禁用SELINUX：
$ setenforce 0
$ cat /etc/selinux/config
SELINUX=disabled
# 创建/etc/sysctl.d/k8s.conf文件，添加如下内容
cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system
#关闭系统Swap
swapoff -a
sed -i 's/.*swap.*/#&/' /etc/fstab

镜像准备

如果你的节点上面有科学上网的工具，可以忽略这一步，我们需要提前将所需的http://gcr.io上面的镜像下载到节点上面，当然前提条件是你已经成功安装了docker。

1、master节点，执行下面的命令：

docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.12.0
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.12.0
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.12.0
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.12.0
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.2.24
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.2
docker pull cnych/flannel:v0.10.0-amd64
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1
docker pull registry.cn-hangzhou.aliyuncs.com/k8sth/kubernetes-dashboard-amd64:v1.8.3
docker pull registry.cn-hangzhou.aliyuncs.com/k8sth/heapster-grafana-amd64:v4.4.3
docker pull registry.cn-hangzhou.aliyuncs.com/k8sth/heapster-influxdb-amd64:v1.3.3
docker pull registry.cn-hangzhou.aliyuncs.com/k8sth/heapster-amd64:3.1

docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.12.0 k8s.gcr.io/kube-apiserver:v1.12.0
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.12.0
docker tag
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.12.0 k8s.gcr.io/kube-proxy:v1.12.0
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.12.0
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1 k8s.gcr.io/pause:3.1
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.2.24 k8s.gcr.io/etcd:3.2.24
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.2 k8s.gcr.io/coredns:1.2.2
docker tag cnych/flannel:v0.10.0-amd64:v0.10.0-amd64 quay.io/coreos/flannel:v0.10.0-amd64

2、slave节点，执行下面的命令：

docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.12.0
docker pull cnych/flannel:v0.10.0-amd64
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1
docker tag
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.12.0 k8s.gcr.io/kube-proxy:v1.12.0
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1 k8s.gcr.io/pause:3.1
docker tag cnych/flannel:v0.10.0-amd64:v0.10.0-amd64 quay.io/coreos/flannel:v0.10.0-amd64

安装配置kubernetes

两个节点都需要安装
安装

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
EOF

我们是安装最新版本的，所以直接yum install -y kubeadm即可，它会安装相应依赖包。

如果要指定版本，可以先看看有那些版本
yum list kubeadm --showduplicates

配置 kubelet

修改文件kubelet的配置文件/etc/systemd/system/kubelet.service.d/10-kubeadm.conf, 配置文件中增加一项配置(在ExecStart之前)：

Environment="KUBELET_EXTRA_ARGS=--fail-swap-on=false"

如图所示：

# kubelet设置开机自动运行
systemctl enable kubelet

启动kubelet：

systemctl start kubelet

集群安装

$ kubeadm init
> --kubernetes-version=v1.12.0
> --pod-network-cidr=10.244.0.0/16
> --apiserver-advertise-address=192.168.124.129
> --ignore-preflight-errors=Swap
[init] using Kubernetes version: v1.12.0
[preflight] running pre-flight checks
[WARNING Swap]: running with swap on is not supported. Please disable swap
[WARNING SystemVerification]: this Docker version is not on the list of validated versions: 17.12.1-ce. Latest validated version: 18.06
[preflight/images] Pulling images required for setting up a Kubernetes cluster
[preflight/images] This might take a minute or two, depending on the speed of your internet connection
[preflight/images] You can also perform this action in beforehand using 'kubeadm config images pull'
[kubelet] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[preflight] Activating the kubelet service
[certificates] Generated etcd/ca certificate and key.
[certificates] Generated etcd/server certificate and key.
[certificates] etcd/server serving cert is signed for DNS names [node1 localhost] and IPs [127.0.0.1 ::1]
[certificates] Generated etcd/peer certificate and key.
[certificates] etcd/peer serving cert is signed for DNS names [node1 localhost] and IPs [192.168.124.129 127.0.0.1 ::1]
[certificates] Generated apiserver-etcd-client certificate and key.
[certificates] Generated etcd/healthcheck-client certificate and key.
[certificates] Generated ca certificate and key.
[certificates] Generated apiserver certificate and key.
[certificates] apiserver serving cert is signed for DNS names [node1 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 192.168.124.129]
[certificates] Generated apiserver-kubelet-client certificate and key.
[certificates] Generated front-proxy-ca certificate and key.
[certificates] Generated front-proxy-client certificate and key.
[certificates] valid certificates and keys now exist in "/etc/kubernetes/pki"
[certificates] Generated sa key and public key.
[kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/admin.conf"
[kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/kubelet.conf"
[kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/controller-manager.conf"
[kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/scheduler.conf"
[controlplane] wrote Static Pod manifest for component kube-apiserver to "/etc/kubernetes/manifests/kube-apiserver.yaml"
[controlplane] wrote Static Pod manifest for component kube-controller-manager to "/etc/kubernetes/manifests/kube-controller-manager.yaml"
[controlplane] wrote Static Pod manifest for component kube-scheduler to "/etc/kubernetes/manifests/kube-scheduler.yaml"
[etcd] Wrote Static Pod manifest for a local etcd instance to "/etc/kubernetes/manifests/etcd.yaml"
[init] waiting for the kubelet to boot up the control plane as Static Pods from directory "/etc/kubernetes/manifests"
[init] this might take a minute or longer if the control plane images have to be pulled
[apiclient] All control plane components are healthy after 22.507741 seconds
[uploadconfig] storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config-1.12" in namespace kube-system with the configuration for the kubelets in the cluster
[markmaster] Marking the node node1 as master by adding the label "node-role.kubernetes.io/master=''"
[markmaster] Marking the node node1 as master by adding the taints [node-role.kubernetes.io/master:NoSchedule]
[patchnode] Uploading the CRI Socket information "/var/run/dockershim.sock" to the Node API object "node1" as an annotation
[bootstraptoken] using token: momf47.0scodcv3cm6t75vm
[bootstraptoken] configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstraptoken] configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstraptoken] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstraptoken] creating the "cluster-info" ConfigMap in the "kube-public" namespace
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy
Your Kubernetes master 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/
You can now join any number of machines by running the following on each node
as root:
kubeadm join 192.168.124.129:6443 --token momf47.0scodcv3cm6t75vm --discovery-token-ca-cert-hash sha256:cfeed429d671eeb39b8980ada10b55e79057cc65e108660ef86ae5043d6275f8

初始化主要过程为：

1.kubeadm 执行初始化前的检查
2.生成 token 和证书
3.生成 KubeConfig 文件，kubelet 需要这个文件与 Master 通信。
4.安装 Master 组件，会从 goolge 的 Registry 下载组件的 Docker 镜像，这一步可能会花一些时间，主要取决于网络质量，如果本地已有相关镜像则会优先使用本地的。
5.安装附加组件 kube-proxy 和 kube-dns
6.Kubernetes Master 初始化成功
7.提示后续操作

初始化失败后处理办法

kubeadm reset

node1上面执行如下命令

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

kubeadm生成证书密码文件分发到node2上面去

scp -r /etc/kubernetes/pki node03:/etc/kubernetes/

部署flannel网络，只需要在node1执行就行

$ wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
$ kubectl apply -f kube-flannel.yml

$ kubectl get node
NAME STATUS ROLES AGE VERSION
node1 Ready master 5m32s v1.12.2

安装完成后使用kubectl get pods命令可以查看到我们集群中的组件运行状态，如果都是Running状态的话，那么恭喜你，你的master节点安装成功了。

kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-576cbf47c7-mntdb 1/1 Running 0 5m20s
kube-system coredns-576cbf47c7-rswvv 1/1 Running 0 5m20s
kube-system etcd-node1 1/1 Running 0 4m33s
kube-system kube-apiserver-node1 1/1 Running 0 4m44s
kube-system kube-controller-manager-node1 1/1 Running 0 4m28s
kube-system kube-flannel-ds-amd64-gxqq8 1/1 Running 0 24s
kube-system kube-proxy-4xgvb 1/1 Running 0 5m20s
kube-system kube-scheduler-node1 1/1 Running 0 4m38s

部署Dashboard插件

kubernetes-dashboard.yaml文件内容如下:

# Copyright 2017 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Configuration to deploy release version of the Dashboard UI compatible with
# Kubernetes 1.8.
#
# Example usage: kubectl create -f <this_file>
# ------------------- Dashboard Secret ------------------- #
apiVersion: v1
kind: Secret
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-certs
namespace: kube-system
type: Opaque
---
# ------------------- Dashboard Service Account ------------------- #
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
---
# ------------------- Dashboard Role & Role Binding ------------------- #
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: kubernetes-dashboard-minimal
namespace: kube-system
rules:
# Allow Dashboard to create 'kubernetes-dashboard-key-holder' secret.
- apiGroups: [""]
resources: ["secrets"]
verbs: ["create"]
# Allow Dashboard to create 'kubernetes-dashboard-settings' config map.
- apiGroups: [""]
resources: ["configmaps"]
verbs: ["create"]
# Allow Dashboard to get, update and delete Dashboard exclusive secrets.
- apiGroups: [""]
resources: ["secrets"]
resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs"]
verbs: ["get", "update", "delete"]
# Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map.
- apiGroups: [""]
resources: ["configmaps"]
resourceNames: ["kubernetes-dashboard-settings"]
verbs: ["get", "update"]
# Allow Dashboard to get metrics from heapster.
- apiGroups: [""]
resources: ["services"]
resourceNames: ["heapster"]
verbs: ["proxy"]
- apiGroups: [""]
resources: ["services/proxy"]
resourceNames: ["heapster", "http:heapster:", "https:heapster:"]
verbs: ["get"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: kubernetes-dashboard-minimal
namespace: kube-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: kubernetes-dashboard-minimal
subjects:
- kind: ServiceAccount
name: kubernetes-dashboard
namespace: kube-system
---
# ------------------- Dashboard Deployment ------------------- #
kind: Deployment
apiVersion: apps/v1beta2
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
spec:
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
k8s-app: kubernetes-dashboard
template:
metadata:
labels:
k8s-app: kubernetes-dashboard
spec:
nodeSelector:
node-role.kubernetes.io/master: ""
containers:
- name: kubernetes-dashboard
image: registry.cn-hangzhou.aliyuncs.com/k8sth/kubernetes-dashboard-amd64:v1.8.3
ports:
- containerPort: 8443
protocol: TCP
args:
- --auto-generate-certificates
# Uncomment the following line to manually specify Kubernetes API server Host
# If not specified, Dashboard will attempt to auto discover the API server and connect
# to it. Uncomment only if the default does not work.
# - --apiserver-host=http://my-address:port
volumeMounts:
- name: kubernetes-dashboard-certs
mountPath: /certs
# Create on-disk volume to store exec logs
- mountPath: /tmp
name: tmp-volume
livenessProbe:
httpGet:
scheme: HTTPS
path: /
port: 8443
initialDelaySeconds: 30
timeoutSeconds: 30
volumes:
- name: kubernetes-dashboard-certs
secret:
secretName: kubernetes-dashboard-certs
- name: tmp-volume
emptyDir: {}
serviceAccountName: kubernetes-dashboard
# Comment the following tolerations if Dashboard must not be deployed on master
tolerations:
- key: node-role.kubernetes.io/master
effect: NoSchedule
---
# ------------------- Dashboard Service ------------------- #
kind: Service
apiVersion: v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
spec:
type: NodePort
ports:
- port: 443
targetPort: 8443
nodePort: 30000
selector:
k8s-app: kubernetes-dashboard
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin-user
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: admin-user
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: admin-user
namespace: kube-system

执行如下文件

kubectl create -f kubernetes-dashboard.yaml

获取token,通过令牌登陆

$ kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')
Name: admin-user-token-z6lhq
Namespace: kube-system
Labels: <none>
Annotations: kubernetes.io/service-account.name: admin-user
kubernetes.io/service-account.uid: 1b1a9541-ed6d-11e8-8458-000c2960d34d
Type: kubernetes.io/service-account-token
Data
====
ca.crt: 1025 bytes
namespace: 11 bytes
token: eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyLXRva2VuLXo2bGhxIiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiIxYjFhOTU0MS1lZDZkLTExZTgtODQ1OC0wMDBjMjk2MGQzNGQiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06YWRtaW4tdXNlciJ9.sdAwrS-tLEHY62ufIwZBrC58-yVsqMGV_AdeyFu8EBPpzdSfgCDemPIyEonGdz9cU6CLMpLnvJ4r7OLBexCaZ4WPIh_Q6N3YjK150d--3uzxQVxtoezVrrgBUCAUgC1KNewa0Suu32A-c-tPj2ykxSGpIYVDDQDQKqw_2E91diF-WKD9YMTl2H9sQU6N9RvSW7t0kQKcBFe8mDTUl4jrT-LnaISL_Qxcn0gwTlU-cbTBYuTpKvyLJ-aa6DfmFebQWA_Je-CLwh6ayk1X6DVVaSE_H5S9atGvnLQ1QVuj3ukHRtKnNSzAGM-boBaGTWZ0Khxo3sbsi7kvUZArYV1Vow

通过firefox访问dashboard，输入token,即可登陆

https://192.168.124.129:30000/#!/login

安装heapster

$ kubectl create -f kube-heapster/influxdb/
$ kubectl create -f kube-heapster/rbac/

heapster文件信息:

[root@node01 ~]# tree kube-heapster/
kube-heapster/
├── influxdb
│ ├── grafana.yaml
│ ├── heapster.yaml
│ └── influxdb.yaml
└── rbac
└── heapster-rbac.yaml

grafana.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: monitoring-grafana
namespace: kube-system
spec:
replicas: 1
template:
metadata:
labels:
task: monitoring
k8s-app: grafana
spec:
nodeSelector:
node-role.kubernetes.io/master: ""
containers:
- name: grafana
image: registry.cn-hangzhou.aliyuncs.com/k8sth/heapster-grafana-amd64:v4.4.3
imagePullPolicy: IfNotPresent
ports:
- containerPort: 3000
protocol: TCP
volumeMounts:
- mountPath: /etc/ssl/certs
name: ca-certificates
readOnly: true
- mountPath: /var
name: grafana-storage
env:
- name: INFLUXDB_HOST
value: monitoring-influxdb
- name: GF_SERVER_HTTP_PORT
value: "3000"
# The following env variables are required to make Grafana accessible via
# the kubernetes api-server proxy. On production clusters, we recommend
# removing these env variables, setup auth for grafana, and expose the grafana
# service using a LoadBalancer or a public IP.
- name: GF_AUTH_BASIC_ENABLED
value: "false"
- name: GF_AUTH_ANONYMOUS_ENABLED
value: "true"
- name: GF_AUTH_ANONYMOUS_ORG_ROLE
value: Admin
- name: GF_SERVER_ROOT_URL
# If you're only using the API Server proxy, set this value instead:
# value: /api/v1/namespaces/kube-system/services/monitoring-grafana/proxy
value: /
volumes:
- name: ca-certificates
hostPath:
path: /etc/ssl/certs
- name: grafana-storage
emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
labels:
# For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons)
# If you are NOT using this as an addon, you should comment out this line.
kubernetes.io/cluster-service: 'true'
kubernetes.io/name: monitoring-grafana
name: monitoring-grafana
namespace: kube-system
spec:
# In a production setup, we recommend accessing Grafana through an external Loadbalancer
# or through a public IP.
# type: LoadBalancer
# You could also use NodePort to expose the service at a randomly-generated port
# type: NodePort
ports:
- port: 80
targetPort: 3000
selector:
k8s-app: grafana

heapster.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
name: heapster
namespace: kube-system
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: heapster
namespace: kube-system
spec:
replicas: 1
template:
metadata:
labels:
task: monitoring
k8s-app: heapster
spec:
serviceAccountName: heapster
nodeSelector:
node-role.kubernetes.io/master: ""
containers:
- name: heapster
image: registry.cn-hangzhou.aliyuncs.com/k8sth/heapster-amd64:v1.4.2
imagePullPolicy: IfNotPresent
command:
- /heapster
- --source=kubernetes:https://kubernetes.default
- --sink=influxdb:http://monitoring-influxdb.kube-system.svc:8086
---
apiVersion: v1
kind: Service
metadata:
labels:
task: monitoring
# For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons)
# If you are NOT using this as an addon, you should comment out this line.
kubernetes.io/cluster-service: 'true'
kubernetes.io/name: Heapster
name: heapster
namespace: kube-system
spec:
ports:
- port: 80
targetPort: 8082
selector:
k8s-app: heapster

influxdb.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: monitoring-influxdb
namespace: kube-system
spec:
replicas: 1
template:
metadata:
labels:
task: monitoring
k8s-app: influxdb
spec:
nodeSelector:
node-role.kubernetes.io/master: ""
containers:
- name: influxdb
image: registry.cn-hangzhou.aliyuncs.com/k8sth/heapster-influxdb-amd64:v1.3.3
imagePullPolicy: IfNotPresent
volumeMounts:
- mountPath: /data
name: influxdb-storage
volumes:
- name: influxdb-storage
emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
labels:
task: monitoring
# For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons)
# If you are NOT using this as an addon, you should comment out this line.
kubernetes.io/cluster-service: 'true'
kubernetes.io/name: monitoring-influxdb
name: monitoring-influxdb
namespace: kube-system
spec:
ports:
- port: 8086
targetPort: 8086
selector:
k8s-app: influxdb

heapster-rbac.yaml

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: heapster
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:heapster
subjects:
- kind: ServiceAccount
name: heapster
namespace: kube-system

让master也运行pod（默认master不运行pod）

kubectl taint nodes --all node-role.kubernetes.io/master-

添加node2节点到集群

在node2节点执行如下命令，即可将节点添加进集群

kubeadm join 192.168.124.129:6443 --token momf47.0scodcv3cm6t75vm --discovery-token-ca-cert-hash sha256:cfeed429d671eeb39b8980ada10b55e79057cc65e108660ef86ae5043d6275f8 --ignore-preflight-errors=Swap
[preflight] running pre-flight checks
[WARNING RequiredIPVSKernelModulesAvailable]: the IPVS proxier will not be used, because the following required kernel modules are not loaded: [ip_vs ip_vs_rr ip_vs_wrr ip_vs_sh] or no builtin kernel ipvs support: map[ip_vs:{} ip_vs_rr:{} ip_vs_wrr:{} ip_vs_sh:{} nf_conntrack_ipv4:{}]
you can solve this problem with following methods:
1. Run 'modprobe -- ' to load missing kernel modules;
2. Provide the missing builtin kernel ipvs support
[WARNING SystemVerification]: this Docker version is not on the list of validated versions: 17.12.1-ce. Latest validated version: 18.06
[discovery] Trying to connect to API Server "192.168.124.129:6443"
[discovery] Created cluster-info discovery client, requesting info from "https://192.168.124.129:6443"
[discovery] Requesting info from "https://192.168.124.129:6443" again to validate TLS against the pinned public key
[discovery] Cluster info signature and contents are valid and TLS certificate validates against pinned roots, will use API Server "192.168.124.129:6443"
[discovery] Successfully established connection with API Server "192.168.124.129:6443"
[kubelet] Downloading configuration for the kubelet from the "kubelet-config-1.12" ConfigMap in the kube-system namespace
[kubelet] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[preflight] Activating the kubelet service
[tlsbootstrap] Waiting for the kubelet to perform the TLS Bootstrap...
[patchnode] Uploading the CRI Socket information "/var/run/dockershim.sock" to the Node API object "node2" as an annotation
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 master to see this node join the cluster.