openshift 目前已经推出了 4.2 的版本，准备开始学习一下 openshift，参考了一本《开源容器云 openshift》，但是安装过程实在是一波三折，特此记录一下。
1. 准备 VMware 虚拟机 RHEL7.4 的环境
每次启动虚拟机都要手动开启网络，不知道怎么设置成开机自动连接网络，使用 NAT 模式能上网就行
2. 设置镜像源
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/7/os/$basearch/
yum clean all
yum makecache
yum update设置镜像源的时候我用的是清华的镜像源，其中有个 $releasever 变量可能会找不到，手动改为 7 即可 yum 三连
3. 下载 openshift
cd /opt/
wget https://github.com/openshift/origin/releases/download/v3.11.0/openshift-origin-server-v3.11.0-0cbc58b-linux-64bit.tar.gzopenshift 的 server 源码包到 /opt 目录下, 在 github 上当前稳定版本是 3.1.1，
4. 解压安装
tar zvf openshift-origin-server-v3.11.0-0cbc58b-linux-64bit.tar.gz
ln -s openshift-origin-server-v3.11.0-0cbc58b-linux-64bit.tar.gz /opt/openshift设置一个软连接方便使用, 下次直接用 /opt/opeshif 目录就行了，然后将这个目录添加到环境变量中，修改 /etc/profile，这样就能用 openshift 命令了
PATH=$PATH:/opt/openshift5. 启动 openshift
这里遇到了不少问题
第一次启动失败
不能用 openshift start 启动会报错，这个命令已经废弃了，需要用 oc cluster up 启动
Command "start" is deprecated, This command will be replaced by the hypershift and hyperkube binaries for starting individual components.
Start components of OpenShift
This command launches components of OpenShift.第二次启动失败
使用 oc cluster up 启动 kube-apiserver 失败
I1119 23:43:45.311335 18475 run_self_hosted.go:181] Waiting for the kube-apiserver to be ready ...
E1119 23:48:45.514801 18475 run_self_hosted.go:571] API server error: Get https://127.0.0.1:8443/healthz?timeout=32s: dial tcp 127.0.0.1:8443: connect: connection refused ()
Error: timed out waiting for the condition查了一圈发现需要关掉防火墙
firewall-cmd --state
systemctl stop firewalld.service
systemctl disable firewalld.service第三次启动失败
再启动又失败了，这次直接停在了 kube-apiserver 那步，直到超时退出
又查了下 journalctl，需要设置 docker 启动参数
修改 /etc/sysconfig/docker，增加 insercure-registry 和 registry-mirrors 参数，设置完重启 docker
--insecure-registry 172.30.0.0/16 --registry-mirror=https://docker.mirrors.ustc.edu.cn第四次启动失败
再启动还是失败
E1120 00:25:35.411914 27357 run_self_hosted.go:571] API server error: Get https://127.0.0.1:8443/healthz?timeout=32s: dial tcp 127.0.0.1:8443: connect: connection refused ()
Error: timed out waiting for the condition原因可能是我启动时用的是 oc cluster up –skip-registry-check=true
每次重试的时候需要先执行 oc cluster down
第五次启动失败
再启动试试
Failed to install "openshift-image-registry": could not run "openshift-image-registry": rc=1这次没查出什么原因，可能是网络问题吧
第六次启动失败
再启动试试
panic: Get https://127.0.0.1:8443/apis/apiregistration.k8s.io/v1beta1/apiservices?watch=true: dial tcp 127.0.0.1:8443: connect: connection refused
goroutine 1363 [running]:
github.com/openshift/origin/pkg/oc/clusterup.watchAPIServices(0x30bb640, 0xc4200d2660)
/go/src/github.com/openshift/origin/_output/local/go/src/github.com/openshift/origin/pkg/oc/clusterup/run_self_hosted.go:591 +0x5f6这次还是报 8443 连不同，我修改了一下 DNS，在 /etc/resolve.conf 中添加了 8.8.8.8
第七次启动失败
再试一遍（崩溃）
Getting a Docker client ...
Checking if image openshift/origin-control-plane:v3.11 is available ...
Checking type of volume mount ...
Determining server IP ...
Checking if OpenShift is already running ...
Checking for supported Docker version (=>1.22) ...
Checking if insecured registry is configured properly in Docker ...
Checking if required ports are available ...
Checking if OpenShift client is configured properly ...
Checking if image openshift/origin-control-plane:v3.11 is available ...
Starting OpenShift using openshift/origin-control-plane:v3.11 ...
I1120 01:37:23.100980 33308 flags.go:30] Running "create-kubelet-flags"
I1120 01:37:24.150876 33308 run_kubelet.go:49] Running "start-kubelet"
I1120 01:37:24.676012 33308 run_self_hosted.go:181] Waiting for the kube-apiserver to be ready ...
I1120 01:41:01.461604 33308 interface.go:26] Installing "kube-proxy" ...
I1120 01:41:01.461825 33308 interface.go:26] Installing "kube-dns" ...
I1120 01:41:01.461831 33308 interface.go:26] Installing "openshift-service-cert-signer-operator" ...
I1120 01:41:01.461836 33308 interface.go:26] Installing "openshift-apiserver" ...
I1120 01:41:01.560613 33308 apply_template.go:81] Installing "kube-proxy"
I1120 01:41:01.586312 33308 apply_template.go:81] Installing "kube-dns"
I1120 01:41:01.586523 33308 apply_template.go:81] Installing "openshift-service-cert-signer-operator"
I1120 01:41:01.589610 33308 apply_template.go:81] Installing "openshift-apiserver"
I1120 01:41:16.765741 33308 interface.go:41] Finished installing "kube-proxy" "kube-dns" "openshift-service-cert-signer-operator" "openshift-apiserver"
I1120 01:42:43.411046 33308 run_self_hosted.go:242] openshift-apiserver available
I1120 01:42:43.973996 33308 interface.go:26] Installing "openshift-controller-manager" ...
I1120 01:42:43.974045 33308 apply_template.go:81] Installing "openshift-controller-manager"
I1120 01:42:55.961497 33308 interface.go:41] Finished installing "openshift-controller-manager"
Adding default OAuthClient redirect URIs ...
Adding centos-imagestreams ...
Adding registry ...
Adding router ...
Adding web-console ...
Adding sample-templates ...
Adding persistent-volumes ...
I1120 01:42:56.386134 33308 interface.go:26] Installing "centos-imagestreams" ...
I1120 01:42:56.386144 33308 interface.go:26] Installing "openshift-image-registry" ...
I1120 01:42:56.386150 33308 interface.go:26] Installing "openshift-router" ...
I1120 01:42:56.386156 33308 interface.go:26] Installing "openshift-web-console-operator" ...
I1120 01:42:56.386162 33308 interface.go:26] Installing "sample-templates" ...
I1120 01:42:56.386167 33308 interface.go:26] Installing "persistent-volumes" ...
I1120 01:42:56.386688 33308 apply_list.go:67] Installing "centos-imagestreams"
I1120 01:42:56.387614 33308 apply_template.go:81] Installing "openshift-web-console-operator"
I1120 01:42:56.387829 33308 interface.go:26] Installing "sample-templates/django quickstart" ...
I1120 01:42:56.387837 33308 interface.go:26] Installing "sample-templates/nodejs quickstart" ...
I1120 01:42:56.387842 33308 interface.go:26] Installing "sample-templates/jenkins pipeline ephemeral" ...
I1120 01:42:56.387847 33308 interface.go:26] Installing "sample-templates/sample pipeline" ...
I1120 01:42:56.387852 33308 interface.go:26] Installing "sample-templates/mongodb" ...
I1120 01:42:56.387856 33308 interface.go:26] Installing "sample-templates/mariadb" ...
I1120 01:42:56.387863 33308 interface.go:26] Installing "sample-templates/postgresql" ...
I1120 01:42:56.387867 33308 interface.go:26] Installing "sample-templates/dancer quickstart" ...
I1120 01:42:56.387873 33308 interface.go:26] Installing "sample-templates/mysql" ...
I1120 01:42:56.387877 33308 interface.go:26] Installing "sample-templates/cakephp quickstart" ...
I1120 01:42:56.387882 33308 interface.go:26] Installing "sample-templates/rails quickstart" ...
I1120 01:42:56.387914 33308 apply_list.go:67] Installing "sample-templates/rails quickstart"
I1120 01:42:56.388076 33308 apply_list.go:67] Installing "sample-templates/django quickstart"
I1120 01:42:56.388168 33308 apply_list.go:67] Installing "sample-templates/nodejs quickstart"
I1120 01:42:56.388248 33308 apply_list.go:67] Installing "sample-templates/jenkins pipeline ephemeral"
I1120 01:42:56.388341 33308 apply_list.go:67] Installing "sample-templates/sample pipeline"
I1120 01:42:56.388438 33308 apply_list.go:67] Installing "sample-templates/mongodb"
I1120 01:42:56.388609 33308 apply_list.go:67] Installing "sample-templates/mariadb"
I1120 01:42:56.388723 33308 apply_list.go:67] Installing "sample-templates/postgresql"
I1120 01:42:56.388799 33308 apply_list.go:67] Installing "sample-templates/dancer quickstart"
I1120 01:42:56.388909 33308 apply_list.go:67] Installing "sample-templates/mysql"
I1120 01:42:56.388981 33308 apply_list.go:67] Installing "sample-templates/cakephp quickstart"
I1120 01:43:58.037546 33308 interface.go:41] Finished installing "sample-templates/django quickstart" "sample-templates/nodejs quickstart" "sample-templates/jenkins pipeline ephemeral" "sample-templates/sample pipeline" "sample-templates/mongodb" "sample-templates/mariadb" "sample-templates/postgresql" "sample-templates/dancer quickstart" "sample-templates/mysql" "sample-templates/cakephp quickstart" "sample-templates/rails quickstart"
I1120 01:44:01.240798 33308 interface.go:41] Finished installing "centos-imagestreams" "openshift-image-registry" "openshift-router" "openshift-web-console-operator" "sample-templates" "persistent-volumes"
Login to server ...
Error: Internal error occurred: unexpected response: 400这次启动应该没什么大问题，最后遇到个 400 错误估计是内部参数错误，这时候打开浏览器 https://127.0.0.1:8443 终于有界面了
尝试用默认账户 dev/dev 登录一下，应该算是装好了吧
https://docs.okd.io/latest/mi…
https://yq.aliyun.com/article…
https://blog.csdn.net/wiborgi…