Skaffold always builds a new image when no file has been changed!

[oo00spy00oo]

Listing files to watch...

• [REDACT]
  Generating tags...
• [REDACT] -> [REDACT]:v1.0.3-44-ga3593b2-dirty
  Checking cache...
• [REDACT] Not found. Building

Expected behavior

In case sync mode is enabled, we should have an option to disable auto-build mode when changing the content of any files!

Actual behavior:

Skaffold always builds the new image while I didn't change anything in my project.

Information

• Skaffold version: version: v1.14.0
• Operating system: MacOSX 10.16
• Contents of skaffold.yaml:

apiVersion: skaffold/v2beta7
kind: Config
build:
  artifacts:
    - image: [REDACT]
      sync:
        infer:
          - "**/*.go"
      kaniko:
        dockerfile: Dockerfile.kaniko
  cluster:
    namespace: [REDACT]
    dockerConfig:
      secretName: kaniko-secret
deploy:
  kustomize: {}

[nkubala]

hey @oo00spy00oo thanks for the issue. I want to make sure I understand exactly what's going on here - is skaffold continuously rebuilding your image even when you change no files? or is skaffold rebuilding when it's supposed to just be syncing, since you have sync configured in your skaffold.yaml? it sounds like there could be a bug here so I want to make sure we're investigating the right thing.

in the meantime, if you'd like you can use the --auto-build=false flag to disable automatic rebuilding. you can then hit the skaffold API to trigger builds when you're ready - the port is automatically assigned and given through the logs if you don't provide one, or you can specify it explicitly using the --rpc-port or --rpc-http-port flag.

skaffold dev --auto-build=false --rpc-http-port=12345
<make some code changes>
curl http://localhost:12345/v1/execute -d '{"build": true}' <- do this in a different terminal window

[NixBiks]

I’ll chip in since I have a similar issue if I understand @oo00spy00oo correctly.

My issue is when I run skaffold build (or run) in my GitHub action then it rebuilds every artifact - also the ones that are already available in my remote repo (and haven’t been changed). So it doesn’t use the remote repo as cache.

[oo00spy00oo]

hey @oo00spy00oo thanks for the issue. I want to make sure I understand exactly what's going on here - is skaffold continuously rebuilding your image even when you change no files? or is skaffold rebuilding when it's supposed to just be syncing, since you have sync configured in your skaffold.yaml? it sounds like there could be a bug here so I want to make sure we're investigating the right thing.

in the meantime, if you'd like you can use the --auto-build=false flag to disable automatic rebuilding. you can then hit the skaffold API to trigger builds when you're ready - the port is automatically assigned and given through the logs if you don't provide one, or you can specify it explicitly using the --rpc-port or --rpc-http-port flag.

skaffold dev --auto-build=false --rpc-http-port=12345
<make some code changes>
curl http://localhost:12345/v1/execute -d '{"build": true}' <- do this in a different terminal window

I meant when sync mode is enabled, Skaffold is continuously rebuilding the image, it isn't necessary or it makes sync mode become non-sensical.

[briandealwis]

@oo00spy00oo could you please attach your logs from running with skaffold dev -v debug? I'm wondering if the sync is being attempted but is failing, and so the image is being rebuilt.

[tejal29]

This could be related to #4898
Can you please confirm if your Dockerfile has a Copy . ?

[briandealwis]

Closing, but will re-open if @oo00spy00oo can provide more detail.

[medkbadri]

I have a similar problem. Once my deployment becomes healthy, skaffold rebuilds it