openshift 入门 部署 openshift-origin-server-v3.7.0

OpenShift是一个基于容器技术的云平台，这里的容器技术指的就是docker和kubernetes.

Openshift 错误解决

错误信息

failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: "systemd" is different from docker cgroup driver: "cgroupfs"

解决

vi /usr/lib/systemd/system/docker.service

改为

#ExecStart=/usr/bin/dockerd
ExecStart=/usr/bin/dockerd --exec-opt native.cgroupdriver=systemd

重启docker

systemctl daemon-reload

systemctl restart docker

参考：https://blog.csdn.net/engchina/article/details/78823347

根据官方文档，selinux要修改为：

SELINUX=enforcing SELINUXTYPE=targeted

cd /opt/

tar -zxf openshift-origin-server-v3.7.0-7ed6862-linux-64bit.tar.gz

ln -s openshift-origin-server-v3.7.0-7ed6862-linux-64bit /opt/openshift/

vim /etc/profile

追加 ：PATH=$PATH:/opt/openshift/

source /etc/profile

cd /opt/openshift/

openshift start

访问： https://10.2.1.102:8443

dev/dev

然后deploy

生成pod

然后可以在本机访问

curl 172.17.0.3:8080

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1.部署一个完整的应用

1.1 oc version

看版本

1.2. oc login -u dev https://10.2.1.102:8443   通过oc 命令登录

1.3 通过oc new-project  部署一个新项目hello-world-oc

oc new-project hello-world-oc

1.4 通过oc new-app  部署  openshift/hello-world-openshift 镜像的应用

oc new-app openshift/hello-openshift

5.查看信息

oc describe pod hello-openshift-1-qjrhd

查看命名空间 Namespace: hello-world-oc

标签  Labels: app=hello-openshift

ip地址  IP: 172.17.0.4

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1.设置openshift 管理员admin密码

cd /opt/

设置环境变量

#不加login登录会有点问题 
export KUBECONFIG=/opt/openshift/openshift.local.config/master/admin.kubeconfig 
export CURL_CA_BUNDLE=/opt/openshift/openshift.local.config/master/ca.crt

# source /etc/profile
 oc login -u system:admin

Logged into "https://10.2.1.102:8443" as "system:admin" using existing credentials.

You have access to the following projects and can switch between them with 'oc project <projectname>':

* default
kube-public
kube-system
openshift
openshift-infra
openshift-node

Using project "default".

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创建Router

# oadm policy add-scc-to-user privileged system:serviceaccount:default:router
# oadm router router --replicas=1 --service-account=router

查看Router状态。

# oc get pod -n default

# ss -ltn|egrep -w "80|443"

参考：https://blog.csdn.net/huqigang/article/details/77895490