一线开发大牛教你如何使用Kubernetes部署分布式集群

yum install docker -y

chkconfig docker on
service docker start

docker run hello-world

Unable to find image "hello-world: latest" locally
Trying to pull repository docker.io/library/hello-world ...latest: Pulling from docker.io/library/hello-world
9db2ca6ccaee: Pull complete
Digest: sha256:4b8ff392a12ed9ea17784bd3c9a8b1fa3299cac44aca35a85c90c5e3c7afacdcStatus: Downloaded newer image for docker.io/hello-world:latest
WARNING: IPv4 forwarding is disabled. Networking will not work.
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message,Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
( amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client,which sent it
to your terminal.
To try something more ambitious,you can run an Ubuntu container with:$ docker run -it ubuntu bash
Share images, automate workflows,and more with a free Docker ID:
https://hub. docker.com/
For more examples and ideas, visit:
https://docs.docker.com/engine/userguide/

{ "registry-mirrors": ["https : / /9cpn8tt6.mirror.aliyuncs.com"] ]}

docker pull java

Digest: sha256:c1ff613e8ba25833d2e1940da0940c3824f03f802c449f3d1815a66b7f8cOe9d Status:
Downloaded newer image for docker.io/java: latest

docker pull java:7

FROM nginx
RUN echo '<h1>Nginx Hello world!</h1>' >/usr/share/nginx/html/index.html

docker build -t nginx .

Successfully built a3c8cee6148b

REPOSITORY      TAG    IMAGE ID                 CREATED                         SIZE
nginx                 latest    b8cd84ec56e7     About an hour ago      109MB

docker images

docker search java

docker rmi docker.io/java:7

docker rmi d23bdf5b1b1b

docker run -d -p 91:80 nginx

docker exec -it 806d1021575d /bin/bash

docker rm 806d1021575d

yum install etcd -y

systemctl start etcd
systemctl enable etcd

etcdctl -C http://localhost:2379 cluster-health

member 8e9e05c52164694d is healthy: got healthy result from http://localhost:2379
cluster is healthy

yum install kubernetes -y

KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,
LimitRanger,SecurityContextDeny, ResourceQuota"

systemct1 start kube-apiserver
systemctl enable kube-apiserver
systemctl start kube-controller-manager
systemctl enable kube-controller-manager
systemctl start kube-scheduler
systemctl enable kube-scheduler

systemctl start kubelet
systemctl enable kubelet
systemctl start kube-proxy
systemct1 enable kube-proxy

[root@localhost ~]# kubectl get no
NAME      STATUS   AGE
127.0.8.1 Ready     1h

yum install flannel -y

FLANNEL_OPTIONS=" --logtostderr=false --log_dir=/var/log/k8s/flannel/--etcd-prefix=/atomic.io/
network --etcd-endpoints=http:/ / localhost:2379 --iface=ens33"

etcdctl mk /atomic.io/network/config '{"Network" : "10.0.0.0/16" }'

systemctl enable flanneld
systemctl start flanneldservice docker restart
systemctl restart kube-apiserver
systemctl restart kube-controller-managersystemctl restart kube-scheduler
systemct1 enable flanneld
systemctl start flanneldservice docker restartsystemctl restart kubeletsystemctl restart kube-proxy

#下载Java 8的镜像FROM java:8
#将本地文件挂到到/tmp目录VOLUME /tmp
#复制文件到容器
ADD register.jar /register.jar#暴露8101端口
EXPOSE 8101
#配置启动容器后执行的命令
ENTRYPOINT ["java", "-jar", " /register.jar"]

docker build -t register .

Sending build context to Docker daemon 1.019 GB
Step 1/5 : FROM java: 8
--->d23bdf5b1b1b
Step 2/5: VOLUME /tmp
--->[Warning]IPv4 forwarding is disabled. Networking will not work.--- > Running in 63ddece53c5e
--->015fedfaf379
Removing intermediate container 63ddece53c5eStep 3/5 :ADD register.jar /register.jar---> aaed606aa239
Removing intermediate container 940f70c5bddeStep 4/5 :EXPOSE 8101
--->[warning] IPv4 forwarding is disabled. Networking will not work.---> Running in ca6e30c82996
--->22856e75b953
Removing intermediate container ca6e30c82996Step 5/5 :ENTRYPOINT java -jar /register.jar
--->[Warning]IPv4 forwarding is disabled.Networking will not work.---> Running in60636581cda9
--->901d6123e0b7
Removing intermediate container 60636581cda9
Successfully built 901d6123e8b7

[root@localhost ~]#docker images
REPOSITORY  TAG     IMAGE ID             CREATED          SIZE
register        latest    9bc4a8542033        About an hour ago    712 MB

apiVersion: v1
kind: ReplicationControllermetadata:
name: registerspec:
#节点数,设置为多个可以实现负载均衡效果replicas: 1
selector:
app:registertemplate:
metadata:
labels:
app: register
spec:
containers:
- name: register#镜像名
image: register
#本地有镜像就不会去仓库拉取
imagePullPolicy: IfNotPresentports:
- containerPort: 8101

[root@localhost ~]# kubectl create -f register-rc.yaml
replicationcontroller "register" created

[root@localhost ~]#kubectl get po
NAME                        READY          STATUS                         RESTARTS        AGE
register-lsk2g             0/1                containerCreating               0                  3s

[ root@MiNiFi-R3-srV ~]# ll /etc/docker/certs.d/registry.access.redhat.com/redhat-ca.crtlrwxrwXrwx 1 root root 27 7月 31 22:53
/etc/docker/certs.d/registry.access.redhat.com/redhat-ca.crt ->
/etc/rhsm/ca/redhat-uep.pem

yum install *rhsm* -y

[root@MiwiFi-R3-srv ~]# kubectl get po
NAME                  READY     STATUS        RESTARTS    AGE
register-hdmxs   1/1             Running          0              1m

apiVersion : v1
kind: Servicemetadata:
name: registerspec:
type: NodePortports:
- port: 8101
targetPort: 8101nodePort: 30001selector:
app: register

[root@MiwiFi-R3-srv ~]# kubectl create -f register-svc.yaml
service "register" created

[root@localhost ~]#kubectl get svc
NAME          CLUSTER-IP               EXTERNAL-IP               PORT(S)           AGE
kubernetes   10.254.0.1                 <none>                         443/TCP         1h
register      10.254.68.212               <nodes>               8101: 30001/TCP    1h

systemctl stop firewalld
iptables -P FORWARD ACCEPT