Kubeadm部署安装kubernetes1.12.1
1、环境准备（这里是master）
CentOS 7.6 两台配置如下，自己更改主机名，加入hosts, master和node 名字不能一样
# hostname master
# hostnamectl set-hostname master
# hostnamectl set-hostname node01
# hostname node01
vim /etc/hosts 172.21.0.10 master
172.21.0.14 node01
2、关闭防火墙，SELINUX
#防火墙
systemctl stop firewalld
systemctl disable firewalld
systemctl status firewalld #selinux
setenforce 0 [root@master ~]# cat /etc/sysconfig/selinux |egrep SELINUX=|egrep -v '#'
SELINUX=disabled
3、取消swap挂载
#我的主机没有，有的话/etc/fstab 文件注释掉
swapoff -a
4、创建/etc/sysctl.d/k8s.conf文件，添加如下内容
vi /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 #生效
modprobe br_netfilter
sysctl -p /etc/sysctl.d/k8s.conf
5、kube-proxy开启ipvs的前置条件
#保证在节点重启后能自动加载所需模块
[root@master ~]# cat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4
EOF [root@master ~]# chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4 #查看是否已经正确加载所需的内核模块
[root@master ~]# lsmod | grep -e ip_vs -e nf_conntrack_ipv4 #安装了ipset软件包
[root@master ~]# yum install ipset #为了便于查看ipvs的代理规则,安装管理工具ipvsadm
[root@master ~]# yum install ipvsadm
6、安装Docker看前面的博客吧
这里我安装版本 18.06
yum install -y --setopt=obsoletes=0 docker-ce-18.06.1.ce-3.el7
6.1、确认一下iptables filter表中FOWARD链的默认策略(pllicy)为ACCEPT（看网友说的，直接cope图片了）
#如果不是ACCEPT，则修改
iptables -P FORWARD ACCEPT
下面就要用使用kubeadm部署Kubernetes
7、创建配置文件创建文件命令，这里用阿里云的，也可以用其他的
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
8、安装kubelet，kubeadm，kubectl
yum install -y kubectl-1.12.1
yum install -y kubelet-1.12.1
yum install -y kubeadm-1.12.1
9、如果不能翻墙，则需先将需要的镜像拉取到本地，否则初始化命令无法执行
#不清楚需要哪些镜像，则执行下列命令查看，默认显示最新版本，将对应的镜像版本修改以下即可，下列为v1.12.1
[root@master ~]# kubeadm config images list
I0122 13:54:06.772434 29672 version.go:89] could not fetch a Kubernetes version from the internet: unable to get URL "https://dl.k8s.io/release/stable-1.txt": Get https://storage.googleapis.com/kubernetes-release/release/stable-1.txt: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
I0122 13:54:06.772503 29672 version.go:94] falling back to the local client version: v1.12.1
k8s.gcr.io/kube-apiserver:v1.12.1
k8s.gcr.io/kube-controller-manager:v1.12.1
k8s.gcr.io/kube-scheduler:v1.12.1
k8s.gcr.io/kube-proxy:v1.12.1
k8s.gcr.io/pause:3.1
k8s.gcr.io/etcd:3.2.24
k8s.gcr.io/coredns:1.2.2 #创建sh脚本
[root@master ~]# vi k8s.sh
#脚本内容
docker pull mirrorgooglecontainers/kube-apiserver:v1.12.1
docker pull mirrorgooglecontainers/kube-controller-manager:v1.12.1
docker pull mirrorgooglecontainers/kube-scheduler:v1.12.1
docker pull mirrorgooglecontainers/kube-proxy:v1.12.1
docker pull mirrorgooglecontainers/pause:3.1
docker pull mirrorgooglecontainers/etcd:3.2.24
docker pull coredns/coredns:1.2.2 docker tag mirrorgooglecontainers/kube-apiserver:v1.12.1 k8s.gcr.io/kube-apiserver:v1.12.1
docker tag mirrorgooglecontainers/kube-controller-manager:v1.12.1 k8s.gcr.io/kube-controller-manager:v1.12.1
docker tag mirrorgooglecontainers/kube-scheduler:v1.12.1 k8s.gcr.io/kube-scheduler:v1.12.1
docker tag mirrorgooglecontainers/kube-proxy:v1.12.1 k8s.gcr.io/kube-proxy:v1.12.1
docker tag mirrorgooglecontainers/pause:3.1 k8s.gcr.io/pause:3.1
docker tag mirrorgooglecontainers/etcd:3.2.24 k8s.gcr.io/etcd:3.2.24
docker tag coredns/coredns:1.2.2 k8s.gcr.io/coredns:1.2.2 docker rmi mirrorgooglecontainers/kube-apiserver:v1.12.1
docker rmi mirrorgooglecontainers/kube-controller-manager:v1.12.1
docker rmi mirrorgooglecontainers/kube-scheduler:v1.12.1
docker rmi mirrorgooglecontainers/kube-proxy:v1.12.1
docker rmi mirrorgooglecontainers/pause:3.1
docker rmi mirrorgooglecontainers/etcd:3.2.24
docker rmi coredns/coredns:1.2.2 #运行脚本，下载所需镜像
[root@master ~]# bash k8s.sh #查看本地镜像是否下载有我们所需镜像
[root@master ~]# docker image ls
10、关闭系统的Swap
Kubernetes 1.8开始要求关闭系统的Swap，默认配置下kubelet将无法启动
#修改/etc/sysconfig/kubelet [root@master ~]# vi /etc/sysconfig/kubelet
KUBELET_EXTRA_ARGS=--fail-swap-on=false
11、用kubeadm init 初始化集群
#设置kubelet服务开机自启
[root@master ~]# systemctl enable kubelet.service #初始化集群,版本和apiserver地址写自己对应的，Swap首字母大写，不然无效 kubeadm init \
--kubernetes-version=v1.12.1 \
--pod-network-cidr=10.244.0.0/16 \
--apiserver-advertise-address=172.21.0.10 \
--ignore-preflight-errors=Swap
出现下面这个表示成功了
#这个要保留好啊，是在node节点加入验证的
kubeadm join 172.21.0.10:6443 --token 8z2cxm.qqcsb1t6de00rpbm --discovery-token-ca-cert-hash sha256:12a7c4fe9c70b30453600395b36c60d482d28ff8d67ada0377eb39061b949a5d
#不管是管理员还是非管理员用户，最好都运行一下，不然关机重启系统之后可能有各种错误 mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
11.1、到这里就可以运行kubectl命令，进行查看等等操作
[root@master data]# kubectl get cs
NAME STATUS MESSAGE ERROR
controller-manager Healthy ok
scheduler Healthy ok
etcd-0 Healthy {"health": "true"}
[root@master data]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master NotReady master 3m7s v1.12.1
12、Flannel部署
[root@master ~]# cat kube-flannel.yml
---
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: psp.flannel.unprivileged
annotations:
seccomp.security.alpha.kubernetes.io/allowedProfileNames: docker/default
seccomp.security.alpha.kubernetes.io/defaultProfileName: docker/default
apparmor.security.beta.kubernetes.io/allowedProfileNames: runtime/default
apparmor.security.beta.kubernetes.io/defaultProfileName: runtime/default
spec:
privileged: false
volumes:
- configMap
- secret
- emptyDir
- hostPath
allowedHostPaths:
- pathPrefix: "/etc/cni/net.d"
- pathPrefix: "/etc/kube-flannel"
- pathPrefix: "/run/flannel"
readOnlyRootFilesystem: false
# Users and groups
runAsUser:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
fsGroup:
rule: RunAsAny
# Privilege Escalation
allowPrivilegeEscalation: false
defaultAllowPrivilegeEscalation: false
# Capabilities
allowedCapabilities: ['NET_ADMIN']
defaultAddCapabilities: []
requiredDropCapabilities: []
# Host namespaces
hostPID: false
hostIPC: false
hostNetwork: true
hostPorts:
- min: 0
max: 65535
# SELinux
seLinux:
# SELinux is unsed in CaaSP
rule: 'RunAsAny'
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: flannel
rules:
- apiGroups: ['extensions']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames: ['psp.flannel.unprivileged']
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- apiGroups:
- ""
resources:
- nodes
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes/status
verbs:
- patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: flannel
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: flannel
subjects:
- kind: ServiceAccount
name: flannel
namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: flannel
namespace: kube-system
---
kind: ConfigMap
apiVersion: v1
metadata:
name: kube-flannel-cfg
namespace: kube-system
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-amd64
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: In
values:
- linux
- key: beta.kubernetes.io/arch
operator: In
values:
- amd64
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.11.0-amd64
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: quay.io/coreos/flannel:v0.11.0-amd64
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"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-arm64
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: In
values:
- linux
- key: beta.kubernetes.io/arch
operator: In
values:
- arm64
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.11.0-arm64
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: quay.io/coreos/flannel:v0.11.0-arm64
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"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-arm
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: In
values:
- linux
- key: beta.kubernetes.io/arch
operator: In
values:
- arm
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.11.0-arm
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: quay.io/coreos/flannel:v0.11.0-arm
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"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-ppc64le
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: In
values:
- linux
- key: beta.kubernetes.io/arch
operator: In
values:
- ppc64le
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.11.0-ppc64le
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: quay.io/coreos/flannel:v0.11.0-ppc64le
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"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-s390x
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: In
values:
- linux
- key: beta.kubernetes.io/arch
operator: In
values:
- s390x
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.11.0-s390x
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: quay.io/coreos/flannel:v0.11.0-s390x
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"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
kube-flannel.yml
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml [root@master data]# kubectl apply -f kube-flannel.yml
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-amd64 created
daemonset.apps/kube-flannel-ds-arm64 created
daemonset.apps/kube-flannel-ds-arm created
daemonset.apps/kube-flannel-ds-ppc64le created
daemonset.apps/kube-flannel-ds-s390x created
#查看quay.io/coreos/flannel镜像是否下载到本地
[root@master data]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
quay.io/coreos/flannel v0.11.0-amd64 ff281650a721 8 months ago 52.6MB
k8s.gcr.io/kube-proxy v1.12.1 61afff57f010 12 months ago 96.6MB
k8s.gcr.io/kube-apiserver v1.12.1 dcb029b5e3ad 12 months ago 194MB
k8s.gcr.io/kube-controller-manager v1.12.1 aa2dd57c7329 12 months ago 164MB
k8s.gcr.io/kube-scheduler v1.12.1 d773ad20fd80 12 months ago 58.3MB
k8s.gcr.io/etcd 3.2.24 3cab8e1b9802 12 months ago 220MB
k8s.gcr.io/coredns 1.2.2 367cdc8433a4 13 months ago 39.2MB
k8s.gcr.io/pause 3.1 da86e6ba6ca1 22 months ago 742kB
#查看master节点状态是否从notReady变成Ready
[root@master data]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready master 7m42s v1.12.1
#查看pods具体信息，运行的所有pod，会发现有flannel的pod
[root@master data]# kubectl get pods -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
coredns-576cbf47c7-qb4kq 1/1 Running 0 7m49s 10.244.0.3 master <none>
coredns-576cbf47c7-t4hwh 1/1 Running 0 7m49s 10.244.0.2 master <none>
etcd-master 1/1 Running 0 61s 172.21.0.10 master <none>
kube-apiserver-master 1/1 Running 0 90s 172.21.0.10 master <none>
kube-controller-manager-master 1/1 Running 0 77s 172.21.0.10 master <none>
kube-flannel-ds-amd64-l9g7d 1/1 Running 0 2m6s 172.21.0.10 master <none>
kube-proxy-jp25f 1/1 Running 0 7m49s 172.21.0.10 master <none>
kube-scheduler-master 1/1 Running 0 62s 172.21.0.10 master <none>
[root@master data]#
---------------------------------------------------------------------------------------------
node节点
1、上面的1-10步骤基本一样的（镜像的话可以直接打包传过去省着在下载了，）
#创建kubernetes.repo配置文件
#可以参照master节点创建操作，也可以直接将master节点创建号的文件copy过来，copy命令如下：
[root@master ~]# scp /etc/yum.repos.d/kubernetes.repo node01:/etc/yum.repos.d/kubernetes.repo #准备镜像，这里我是将master节点上的镜像利用docker命令打包转义到node01节点
[root@master ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
k8s.gcr.io/kube-proxy v1.12.1 61afff57f010 3 months ago 96.6MB
k8s.gcr.io/kube-controller-manager v1.12.1 aa2dd57c7329 3 months ago 164MB
k8s.gcr.io/kube-scheduler v1.12.1 d773ad20fd80 3 months ago 58.3MB
k8s.gcr.io/kube-apiserver v1.12.1 dcb029b5e3ad 3 months ago 194MB
k8s.gcr.io/etcd 3.2.24 3cab8e1b9802 4 months ago 220MB
k8s.gcr.io/coredns 1.2.2 367cdc8433a4 4 months ago 39.2MB
quay.io/coreos/flannel v0.10.0-amd64 f0fad859c909 12 months ago 44.6MB
k8s.gcr.io/pause 3.1 da86e6ba6ca1 13 months ago 742kB #在master节点，将上述8个镜像打包
[root@master ~]# docker save \
k8s.gcr.io/kube-proxy \
k8s.gcr.io/kube-controller-manager \
k8s.gcr.io/kube-scheduler \
k8s.gcr.io/kube-apiserver \
k8s.gcr.io/etcd \
k8s.gcr.io/coredns \
quay.io/coreos/flannel \
k8s.gcr.io/pause \
-o k8s_all_image.tar
[root@master ~]# ls
anaconda-ks.cfg k8s k8s_all_image.tar k8s.sh
[root@master ~]# scp k8s_all_image.tar node01:k8s_all_image.tar #切换到node01节点，导入镜像
[root@node01 ~]# ls
anaconda-ks.cfg k8s k8s_all_image.tar k8s.sh
[root@node01 ~]# docker load -i k8s_all_image.tar
2、安装kubelet，kubeadm
yum install -y kubelet-1.12.1
yum install -y kubeadm-1.12.1
3、闭swap 就是上面的10步骤
4、加入集群
这里忘记了也没事在master节点上执行
[root@master data]# kubeadm token list
TOKEN TTL EXPIRES USAGES DESCRIPTION EXTRA GROUPS
relcwm.tbajfvtqnitjn794 23h 2019-10-13T16:11:37+08:00 authentication,signing The default bootstrap token generated by 'kubeadm init'. system:bootstrappers:kubeadm:default-node-token
[root@master data]# openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2> /dev/null | openssl dgst -sha256 -hex | sed 's/^.* //'
01dc13237b469d4be709163a8ed3eb84b931d35ac2b46f114d9fc6b18d2f1ef6
#admin.conf 拷贝到node节点上面
scp /etc/kubernetes/admin.conf root@172.21.0.14:/etc/kubernetes/admin.conf
#设置kubelet服务开机自启
[root@node01 ~]# systemctl enable kubelet.service #执行之前记录的jion命令，加入集群
[root@node01 ~]#kubeadm join 172.21.0.10:6443 --token relcwm.tbajfvtqnitjn794 --discovery-token-ca-cert-hash sha256:01dc13237b469d4be709163a8ed3eb84b931d35ac2b46f114d9fc6b18d2f1ef6
[root@node01 ~]# mkdir -p $HOME/.kube
[root@node01 ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@node01 ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config #切换到master节点查看节点信息
[root@master ~]# kubectl get nodes
5、Flannel部署，和上面一样
到现在就大功告成了
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