Cb-tumblebug: Dynamic config for server port

[seokho-son]

What would you like to be enhanced
: Dynamic config for server port (REST api server for this moment)

Why is this needed
: Sometimes users want to use custom port

Proposed solution

• [ ] Add a new environment variable for CB-Tumblebug REST API port.
  Where: https://github.com/cloud-barista/cb-tumblebug/blob/99bbff3b9b115b2e26fcdb2730cf8e052328d04a/conf/setup.env#L6
  Ex: TUMBLEBUG_REST_PORT=1323
• [ ] Replace a section using static port.
  Where: https://github.com/cloud-barista/cb-tumblebug/blob/99bbff3b9b115b2e26fcdb2730cf8e052328d04a/conf/setup.env#L21
  Ex: export SELF_ENDPOINT=localhost:$TUMBLEBUG_REST_PORT
• [ ] Replace a section using static port.
  Where: https://github.com/cloud-barista/cb-tumblebug/blob/99bbff3b9b115b2e26fcdb2730cf8e052328d04a/conf/setup.env#L21
  Ex: export SELF_ENDPOINT=localhost:$TUMBLEBUG_REST_PORT
• [ ] Update the server initiation code with $TUMBLEBUG_REST_PORT
  Where: https://github.com/cloud-barista/cb-tumblebug/blob/99bbff3b9b115b2e26fcdb2730cf8e052328d04a/src/api/rest/server/server.go#L263
  Ex: e.Logger.Fatal(e.Start(":" + os.Getenv("TUMBLEBUG_REST_PORT") ))

[seokho-son]

/help

[betelgeuse-7]

Can't we require the user to pass, for example, --port=1323 ? We can utilize flag package for parsing command line arguments.
If the user doesn't give a port, we can use a default port such as 1323.
¯_(ツ)_/¯

[seokho-son]

@betelgeuse-7 Thank you for the suggestion !
I'd like to invite you to resolve this Issue ! (if you are available)

I think your suggestion is a better solution. :)

I hope to hear @jihoon-seo 's opinion though to check there are no other concerns.
PTAL: @jihoon-seo

[seokho-son]

/assign @betelgeuse-7

[betelgeuse-7]

Okay. I am going to try to add this feature tomorrow. :)

[jihoon-seo]

This issue is resolved by the PR #802.