openshift 源码安装

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》，可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链接网络，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，手动改成7便可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.gz

openshift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

设置一个软链接方便使用,下次直接用/opt/opeshif目录就好了，而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/openshift

5.启动openshift

这里遇到了很多问题

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，须要用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

查了一圈发现须要关掉防火墙

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，此次直接停在了kube-apiserver那步，直到超时退出
又查了下journalctl，须要设置docker启动参数
修改/etc/sysconfig/docker，增长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

再启动仍是失败

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

缘由多是我启动时用的是oc cluster up --skip-registry-check=true
每次重试的时候须要先执行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

此次没查出什么缘由，多是网络问题吧

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

此次仍是报8443连不一样，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

此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

尝试用默认帐户dev/dev登陆一下，应该算是装好了吧

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