因為有客戶需求，所以必須嘗試一下，可悲的是手裡只有3.7的離線安裝文件，加上之前3.11安裝因為同事文件寫得太好，基本沒遇到什麼坑，所以就沒仔細研究就開始搞了。

結果果然是因為/etc/ansible/host檔案寫得有問題，遇到一堆問題，包括:

• 映象不ready,雖然都pull下來了，可是沒仔細看文件，就save -o了文件中的那幾個，所以就造成下面的錯誤，只好重新開始下載

One or more required container images are not available:
                   openshift3/registry-console:v3.6
 
,
                   registry.example.com/openshift3/ose-deployer:v3.6.173.0.130,
                   registry.example.com/openshift3/ose-docker-registry:v3.6.173.0.130,
                   registry.example.com/openshift3/ose-haproxy-router:v3.6.173.0.130,
                   registry.example.com/openshift3/ose-pod:v3.6.173
 
.0.130
               Checked with: skopeo inspect [--tls-verify=false] [--creds=<user>:<pass>] docker://<registry>/<image>
               Default registries searched: registry.example.com, registry.access.redhat.com
               Failed connecting to: registry.example.com, registry.access.redhat.com
 

• registry 443埠沒配，學3.11安裝配了個80以為可以繞信過關，結果就報錯了

[[email protected] ~]# oc logs  registry-console-1-deploy -n default
--> Scaling registry-console-1 to 1
--> Waiting up to 10m0s for pods in rc registry-console-1 to become ready
E1114 13:34:58.912499       1 reflector.go:304] github.com/openshift/origin/pkg/deploy/strategy/support/lifecycle.go:509: Failed to watch *api.Pod: Get https://172.30.0.1:443/api/v1/namespaces/default/pods?labelSelector=deployment%3Dregistry-console-1%2Cdeploymentconfig%3Dregistry-console%2Cname%3Dregistry-console&resourceVersion=1981&timeoutSeconds=412&watch=true: dial tcp 172.30.0.1:443: getsockopt: connection refused

• pull service-catalog的映象出問題，這個是個大坑啊，每次一裝就需要1個多鐘頭，錯誤如下

15m        13m        4    kubelet, master.example.com    spec.containers{apiserver}    Normal        Pulling        pulling image "registry.access.redhat.com/openshift3/ose-service-catalog:v3.6"
  15m        13m        4    kubelet, master.example.com    spec.containers{apiserver}    Warning        Failed        Failed to pull image "registry.access.redhat.com/openshift3/ose-service-catalog:v3.6": rpc error: code = 2 desc = All endpoints blocked.
  15m        13m        6    kubelet, master.example.com    spec.containers{apiserver}    Normal        BackOff        Back-off pulling image "registry.access.redhat.com/openshift3/ose-service-catalog:v3.6"
  15m        4m        46    kubelet, master.example.com                    Warning        FailedSync    Error syncing pod
  

• master上安裝docker找不到，大家都是配置同樣的yum repository,後來只好通過聯網方式的subscription-manager註冊解決。

3.6不像3.11有一個Prequrest的check,這個直接安裝上來，就需要一直等他是否出錯的資訊了，所以每次安裝很長時間。

host檔案的選項可以參考，踩坑必看啊。

https://docs.okd.io/3.6/install_config/install/advanced_install.html#enabling-service-catalog

雖然踩了不少坑，但對安裝過程也有了進一步的瞭解，好吧，我只能這樣安慰一下自己了。