解決helm部署報錯Error: UPGRADE FAILED: another operation (install/upgrade/rollback) is in progress

在使用helm install 或者helm upgrade的時候，如果出現了異常中斷操作， 可能會導緻如下報錯

Error: UPGRADE FAILED: another operation (install/upgrade/rollback) is in progress      

那麼問題來了，如何解決這個問題呢？

參考github上的issues：

https://github.com/helm/helm/issues/8987

，我們可以使用以下操作

1.輸入helm history 指令檢查目前狀态， 如下

$ helm history -n lizhewnei lizhewnei-common
REVISION    UPDATED                     STATUS          CHART                   APP VERSION DESCRIPTION
331         Tue Feb 23 23:11:07 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
332         Wed Feb 24 08:11:08 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
333         Wed Feb 24 15:11:13 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
334         Wed Feb 24 23:11:09 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
335         Thu Feb 25 08:11:09 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
336         Thu Feb 25 15:11:08 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
337         Thu Feb 25 23:11:06 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
338         Fri Feb 26 08:11:13 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
339         Fri Feb 26 09:49:37 2021    deployed        lizhewnei-common-0.1.0  1.16.0      Upgrade complete
340         Fri Feb 26 10:37:53 2021    pending-upgrade lizhewnei-common-0.1.0  1.16.0      Preparing upgrade      

2.根據上述狀态，我們會發現，最近的一次340部署結果是pending-upgrade 是以阻塞了我們的繼續部署

3.我們使用helm rollback指令回退一個版本到339版本

$ helm rollback -n lizhewnei lizhewnei-common 339
Rollback was a success! Happy Helming!      

4.回退之後，再檢查一次目前狀态，确認狀态資訊是回退到339版本

$ helm history -n lizhewnei lizhewnei-common
REVISION    UPDATED                     STATUS          CHART                   APP VERSION DESCRIPTION
332         Wed Feb 24 08:11:08 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
333         Wed Feb 24 15:11:13 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
334         Wed Feb 24 23:11:09 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
335         Thu Feb 25 08:11:09 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
336         Thu Feb 25 15:11:08 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
337         Thu Feb 25 23:11:06 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
338         Fri Feb 26 08:11:13 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
339         Fri Feb 26 09:49:37 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
340         Fri Feb 26 10:37:53 2021    pending-upgrade lizhewnei-common-0.1.0  1.16.0      Preparing upgrade
341         Fri Feb 26 11:00:23 2021    deployed        lizhewnei-common-0.1.0  1.16.0      Rollback to 339      

5.這個時候，我們再去使用helm upgrade指令，就可以正常的更新了，更新之後，我們通過helm history 也可以檢查到更新成功，

$ helm history -n lizhewnei lizhewnei-common
REVISION    UPDATED                     STATUS          CHART                   APP VERSION DESCRIPTION
333         Wed Feb 24 15:11:13 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
334         Wed Feb 24 23:11:09 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
335         Thu Feb 25 08:11:09 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
336         Thu Feb 25 15:11:08 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
337         Thu Feb 25 23:11:06 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
338         Fri Feb 26 08:11:13 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
339         Fri Feb 26 09:49:37 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Upgrade complete
340         Fri Feb 26 10:37:53 2021    pending-upgrade lizhewnei-common-0.1.0  1.16.0      Preparing upgrade
341         Fri Feb 26 11:00:23 2021    superseded      lizhewnei-common-0.1.0  1.16.0      Rollback to 339
342         Fri Feb 26 11:01:27 2021    deployed        lizhewnei-common-0.1.0  1.16.0      Upgrade complete