訪問vcenter 7時提示 no healthy upstream
網上查了一些資料，各式各樣的，匯總下以免下次又花時間找解決方法：
1.Fix no healthy upstream vCenter 7 Issue
There is another guide to help you fix no healthy upstream error of vCenter 7. It might be occurred after upgrading vCenter 6.7 to vCenter 7.
- Shutdown the vCenter
- Upgrade the VM hardware version
- Edit settings > VM Options > General Options > Select VMware Photon OS
Note: make sure you have allocated enough memory and CPU for the vCenter 7 virtual machine. The vCenter 7 is CPU and memory hungry.
這個方法測試過不可行，VCSA創建的vcenter無法找到VMware Photon OS選項，只有新建的Linux才有此選項
2.Check your vCenter hosts file.
If it looks like this
10.200.111.25 vcenter.mydomain.local vcenter
10.200.111.25 vcenter.mydomain.local vcenter
then backup it first and after that change it to this
127.0.0.1 vcenter.mydomain.local vcenter localhost
::1 vcenter.mydomain.local vcenter localhost ipv6-localhost ipv6-loopback
Reboot the vCenter and check if you can access it
This is what support did when i raised a ticket.
Regards,
Foxmr
如果安裝VCSA時，正常設置DNS解析了，/etc/hosts就是上面的結果了，好像也不能解決問題
3. 這位外佬也是溜了一大圈才解決。很搞笑的是前面設置了前面9步，最后告訴你這9步沒Niao用。
no healthy upstream vCenter 7.0 error:
Issue fixed:
after 3.5 hrs of quick search on various blogs/vmware communities/mylab work/organization cook books. found the solution.
Steps tried out:
1. VAMI <IP add:5480> - Stop-Start all Services.
2. Stopped temp Antivirus solution on local host also stopped Windows Defender Firewall.
3. VAMI <https://IP add:5480> click on TIME - change Time Zone to UTC also Time Sync - Mode - set it to Disabled.
4. upgraded VM hardware to version 18. <virtualhw.version = "18">
5. created a new host "A" record FLZ (forward lookup zone) on DNS Server for vcsa <192.168.40.110 vcsa.mylab.com>
6. created Pointer (PTR) record (Reverse lookup zone) on DNS Server for vcsa.<192.168.40.X vcsa.mylab.com>
7. restarted DNS server.
8. restarted vcsa 7.0.1 appliance (VM).
9. cleared web browser cache, tried multiple browsers thinking it can be a problem but,
didn't work all above steps <1 to 9>. (wasted my time though but found a way to fix it by editing " host file" on my local PC [DELL SERVER].
Added below entries on " host file"
Path - C:\Windows\System32\drivers\etc
###########vcenter###################
192.168.40.110 vcsa.mylab.com
192.168.40.100 dc01.mylab.com
192.168.40.110 https://vcsa.mylab.com:5480
192.168.40.110 https://192.168.40.110:5480
127.0.0.1 vcsa.mylab.com
rebooted the vCenter Server and then try to access it and it " Worked fine" for me. thanks.
4..缺少DNS反向指針
Spend 5 hours digging up today installing/reinstalling. So my problem with "no healthy upstream" was DNS:
It seems critical for VCSA 7 during setup stage to have access to the DNS. DNS should contain BOTH A record & PTR record.
My test environment was lacking PTR.
Hope that helps.
5 我自己的環境：
上面一堆設置，我的環境有，也是出現這個no healthy upstream錯誤。跟下面這個類似：
We see the same issue here on all new installations.
The trick seems to be waiting for the cpu usage of the vm goes down. It needs some time to start all the services.
On one installation we had to wait for about 30 minutes.
After the cpu usage is back to normal we were able to login to the vcsa.
It seems that vcsa7 needs a lot of ressources.
去vCenter檢查下服務果然發現問題
啟動確實慢，有好多服務“正在啟動”
等系統各項服務啟動完就可以登錄vcenter，跟以前6.7版本比速度真是慢太多了。
官方的微型默認配置2CPU，12GB Mem不太可行啊，趕緊增加下。
VCSA7真的太吃資源了