1.安裝3臺(tái)虛擬機(jī)，或者使用其他物理機(jī)都OK；
2.三臺(tái)IP地址分別為：192.168.222.135,192.168.222.139,192.168.222.140
2.設(shè)置hostname，master節(jié)點(diǎn)設(shè)置
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hostnamectl set-hostname master3.兩個(gè)node節(jié)點(diǎn)設(shè)置
hostnamectl set-hostname node14.退出shell重新登錄
1.在三臺(tái)服務(wù)器上都安裝docker、kubelet、kubeadm、kubectl，這里有個(gè)腳本，大家可以拿來使用。
~]# vi setup.sh
以下內(nèi)容復(fù)制進(jìn)文件
#/bin/sh
# install some tools
sudo yum install -y vim telnet bind-utils wget
sudo bash -c 'cat < /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF'
# install and start docker
sudo yum install -y docker
sudo systemctl enable docker && sudo systemctl start docker
# Verify docker version is 1.12 and greater.
sudo setenforce 0
# install kubeadm, kubectl, and kubelet.
sudo yum install -y kubelet kubeadm kubectl
sudo bash -c 'cat < /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward=1
EOF'
sudo sysctl --system
sudo systemctl stop firewalld
sudo systemctl disable firewalld
sudo swapoff -a
sudo systemctl enable kubelet && sudo systemctl start kubelet 2.將setup.sh復(fù)制到另外兩臺(tái)服務(wù)器上
scp setup.sh root@192.168.222.139:/root/
scp setup.sh root@192.168.222.140:/root/3.分別在三臺(tái)服務(wù)器上執(zhí)行這個(gè)腳本,腳本其實(shí)就是安裝一些組件，大家都應(yīng)該能看得懂。
sh setup.sh分別在三臺(tái)機(jī)器上運(yùn)行以下命令，確認(rèn)是否安裝完畢需要的組件
[root@node2 ~]# which kubeadm
/usr/bin/kubeadm
[root@node2 ~]# which kubelet
/usr/bin/kubelet
[root@node2 ~]# which kubectl
/usr/local/bin/kubectl
[root@node2 ~]# docker version
Client:
Version: 1.13.1
API version: 1.26
Package version: docker-1.13.1-94.gitb2f74b2.el7.centos.x86_64
Go version: go1.10.3
Git commit: b2f74b2/1.13.1
Built: Tue Mar 12 10:27:24 2019
OS/Arch: linux/amd64
Server:
Version: 1.13.1
API version: 1.26 (minimum version 1.12)
Package version: docker-1.13.1-94.gitb2f74b2.el7.centos.x86_64
Go version: go1.10.3
Git commit: b2f74b2/1.13.1
Built: Tue Mar 12 10:27:24 2019
OS/Arch: linux/amd64
Experimental: false
確認(rèn)沒問題后進(jìn)入下一個(gè)步驟
1.主節(jié)點(diǎn)上進(jìn)行kubeadmin init
sudo kubeadm init --pod-network-cidr 172.100.0.0/16 --apiserver-advertise-address 192.168.222.135
#--pod-network-cidr：pod節(jié)點(diǎn)的網(wǎng)段
#--apiserver-advertise-address：apiserver的IP地址，這里寫成master節(jié)點(diǎn)的IP即可
#-**-apiserver-cert-extra-sans: 如果需要使用公網(wǎng)IP，加上這一條，并且后面加上你的公網(wǎng)IP地址**2.如果發(fā)現(xiàn)拉取鏡像失敗，我是拉取失敗了~~~~ 所以去百度了一下，我們通過 docker.io/mirrorgooglecontainers 中轉(zhuǎn)一下，運(yùn)行以下命令，直接復(fù)制即可
kubeadm config images list |sed -e 's/^/docker pull /g' -e 's#k8s.gcr.io#docker.io/mirrorgooglecontainers#g' |sh -x
docker images |grep mirrorgooglecontainers |awk '{print "docker tag ",$1":"$2,$1":"$2}' |sed -e 's#docker.io/mirrorgooglecontainers#k8s.gcr.io#2' |sh -x
docker images |grep mirrorgooglecontainers |awk '{print "docker rmi ", $1":"$2}' |sh -x
docker pull coreDNS/coredns:1.2.2
docker tag coredns/coredns:1.2.2 k8s.gcr.io/coredns:1.3.1
docker rmi coredns/coredns:1.2.2查看鏡像列表，沒毛病，如果發(fā)現(xiàn)init還報(bào)錯(cuò)的話，按照kubeadm的報(bào)錯(cuò)信息更改下docker鏡像的tag，具體各位百度下吧
[root@master ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
k8s.gcr.io/kube-proxy v1.14.1 20a2d7035165 2 days ago 82.1 MB
k8s.gcr.io/kube-apiserver v1.14.1 cfaa4ad74c37 2 days ago 210 MB
k8s.gcr.io/kube-controller-manager v1.14.1 efb3887b411d 2 days ago 158 MB
k8s.gcr.io/kube-scheduler v1.14.1 8931473d5bdb 2 days ago 81.6 MB
k8s.gcr.io/etcd 3.3.10 2c4adeb21b4f 4 months ago 258 MB
k8s.gcr.io/coredns 1.3.1 367cdc8433a4 7 months ago 39.2 MB
k8s.gcr.io/pause 3.1 da86e6ba6ca1 15 months ago 742 kB
3.kubeadm輸出的主要信息，如下
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 192.168.222.135:6443 --token srbxk3.x6xo6nhv3a4ng08m \
--discovery-token-ca-cert-hash sha256:b302232cbf1c5f3d418cea5553b641181d4bb384aadbce9b1d97b37cde477773 4.運(yùn)行kubeadm配置
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config5.安裝網(wǎng)絡(luò)插件
kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"6.確認(rèn)是否安裝完成，查看pod內(nèi)是否有weave-net即可
[root@master ~]# kubectl get pod --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-fb8b8dccf-glszh 1/1 Running 0 23m
kube-system coredns-fb8b8dccf-xcmtx 1/1 Running 0 23m
kube-system etcd-master 1/1 Running 0 22m
kube-system kube-apiserver-master 1/1 Running 0 22m
kube-system kube-controller-manager-master 1/1 Running 0 22m
kube-system kube-proxy-z84wh 1/1 Running 0 23m
kube-system kube-scheduler-master 1/1 Running 0 22m
kube-system weave-net-phwjz 2/2 Running 0 95s1.在兩臺(tái)node上分別運(yùn)行主要信息內(nèi)的命令，如下（這個(gè)不能復(fù)制，需要查看自己的kubeadm輸出的信息）：
kubeadm join 192.168.222.135:6443 --token srbxk3.x6xo6nhv3a4ng08m \
--discovery-token-ca-cert-hash sha256:b302232cbf1c5f3d418cea5553b641181d4bb384aadbce9b1d97b37cde4777732.加入節(jié)點(diǎn)之后，發(fā)現(xiàn)node一直處于notready狀態(tài)，好糾結(jié)
[root@master bin]# kubectl get node
NAME STATUS ROLES AGE VERSION
master Ready master 167m v1.14.1
node1 NotReady 142m v1.14.1
node2 NotReady 142m v1.14.1
3.查看pod節(jié)點(diǎn)，發(fā)現(xiàn)weave沒啟動(dòng)
[root@master bin]# kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-fb8b8dccf-glszh 1/1 Running 1 168m
kube-system coredns-fb8b8dccf-xcmtx 1/1 Running 1 168m
kube-system etcd-master 1/1 Running 1 167m
kube-system kube-apiserver-master 1/1 Running 1 167m
kube-system kube-controller-manager-master 1/1 Running 1 167m
kube-system kube-proxy-bq2rf 0/1 ContainerCreating 0 143m
kube-system kube-proxy-m8f7z 0/1 ContainerCreating 0 143m
kube-system kube-proxy-z84wh 1/1 Running 1 168m
kube-system kube-scheduler-master 1/1 Running 1 167m
kube-system weave-net-8xmpx 0/2 ContainerCreating 0 143m
kube-system weave-net-phwjz 2/2 Running 4 147m
kube-system weave-net-xwqwm 0/2 ContainerCreating 0 143m
4.使用describe pods發(fā)現(xiàn)報(bào)錯(cuò)，沒有拉取鏡像，可是本機(jī)上已經(jīng)有k8s.gcr.io/pause:3.1 鏡像了，在不懈的努力下，終于知道了，原來node節(jié)點(diǎn)上也需要該鏡像
kubectl describe pods --namespace=kube-system weave-net-8xmpx
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedCreatePodSandBox 77m (x8 over 120m) kubelet, node2 Failed create pod sandbox: rpc error: code = Unknown desc = failed pulling image "k8s.gcr.io/pause:3.1": Get https://k8s.gcr.io/v1/_ping: dial tcp 64.233.189.82:443: connect: connection refused
Warning FailedCreatePodSandBox 32m (x9 over 91m) kubelet, node2 Failed create pod sandbox: rpc error: code = Unknown desc = failed pulling image "k8s.gcr.io/pause:3.1": Get https://k8s.gcr.io/v1/_ping: dial tcp 64.233.188.82:443: connect: connection refused
Warning FailedCreatePodSandBox 22m (x23 over 133m) kubelet, node2 Failed create pod sandbox: rpc error: code = Unknown desc = failed pulling image "k8s.gcr.io/pause:3.1": Get https://k8s.gcr.io/v1/_ping: dial tcp 108.177.97.82:443: connect: connection refused
Warning FailedCreatePodSandBox 17m (x56 over 125m) kubelet, node2 Failed create pod sandbox: rpc error: code = Unknown desc = failed pulling image "k8s.gcr.io/pause:3.1": Get https://k8s.gcr.io/v1/_ping: dial tcp 74.125.203.82:443: connect: connection refused
Warning FailedCreatePodSandBox 12m (x24 over 110m) kubelet, node2 Failed create pod sandbox: rpc error: code = Unknown desc = failed pulling image "k8s.gcr.io/pause:3.1": Get https://k8s.gcr.io/v1/_ping: dial tcp 74.125.204.82:443: connect: connection refused
Warning FailedCreatePodSandBox 2m31s (x20 over 96m) kubelet, node2 Failed create pod sandbox: rpc error: code = Unknown desc = failed pulling image "k8s.gcr.io/pause:3.1": Get https://k8s.gcr.io/v1/_ping: dial tcp 108.177.125.82:443: connect: connection refused
5.node節(jié)點(diǎn)下載該鏡像，分別運(yùn)行以下命令，執(zhí)行后發(fā)現(xiàn)還需要k8s.gcr.io/kube-proxy:v1.14.1 該鏡像，那么一起處理吧（pull的鏡像版本可以自己改，不改的話根據(jù)我的命令執(zhí)行也可以）。
docker pull mirrorgooglecontainers/pause:3.1
docker tag docker.io/mirrorgooglecontainers/pause:3.1 k8s.gcr.io/pause:3.1
docker pull mirrorgooglecontainers/kube-proxy-amd64:v1.11.3
docker tag docker.io/mirrorgooglecontainers/kube-proxy-amd64:v1.11.3 k8s.gcr.io/kube-proxy:v1.14.16.大功告成
1.配置一個(gè)yml文件
vim nginx.yml
apiVersion: v1
kind: Pod
metadata:
name: nginx
labels:
app: web
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort: 802.創(chuàng)建pod
kubectl create -f nginx.yml3.查看IP并訪問
[root@master ~]# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx 1/1 Running 0 4m11s 10.44.0.1 node1
[root@master ~]# curl 10.44.0.1
Welcome to nginx!
Welcome to nginx!
If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.
For online documentation and support please refer to
nginx.org.
Commercial support is available at
nginx.com.
Thank you for using nginx.
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