Ohara: the images checker should not assume all nodes have required images

[HarryChiang143]

Describe the bug
在Demo環境測試運行streamapp，在啟動時前端UI呈現該台機器無streamapp image的錯誤訊息，實際確認該台機器已部署streamapp image，就算砍掉該docker image 並重新拉下來仍然無法執行。

To Reproduce
Steps to reproduce the behavior:

1. 建pipeline
2. 部署streamapp
3. 啟動streamapp
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
Error msg:

Check image:

Operation System (please complete the following information):

• OharaStream Version: v0.8.1
  

• Backend OS & Version: Ohara Demo Site
• Frontend OS & Version: Ohara Demo Site
• Browser & Version :Google Chrome , 版本 75.0.3770.100 (正式版本) (64 位元)

Additional context
Add any other context about the problem here.

[HarryChiang143]

ping 0.8 RM : @konekoya QQ

[chia7712]

@HarryChiang143 這是後段檢查邏輯的問題

你要先順利運作的話，就把該image部屬到"所有節點上"

[vitojeng]

@HarryChiang143 這是後段檢查邏輯的問題
你要先順利運作的話，就把該image部屬到"所有節點上"

意思是 Ohara Demo 環境裡, streamapp image 沒有佈署到所有的 node 嗎?

[chia7712]

意思是 Ohara Demo 環境裡, streamapp image 沒有佈署到所有的 node 嗎?

ping @HarryChiang143

[chia7712]

@jackyoh the workaround works well so this issue does not touch 0.8

1. 確認所有k8s環境下的每個節點都有相關的images
2. 透過k8s APIs /api/v1/nodes/$node 查看是否有相關的images
3. 如果該節點有images但k8s APIs顯示沒有，則可能是有dangling images，請手動刪除

[jackyoh]

the workaround works well so this issue does not touch 0.8

OK, 收到。我會再找時間跟你討論這個問題