Feature/make docker image smaller

m-lab / alertmanager-github-receiver

Prometheus Alertmanager webhook receiver that creates GitHub issues from alerts

Apache License 2.0

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Feature/make docker image smaller #55

Closed aorfanos closed 3 years ago

aorfanos commented 3 years ago

Changes:

updated Go version to 1.17
used distroless static image

Size reduction ~45% (43.49%) from 28.51MB to 16.11MB.

This change is

coveralls commented 3 years ago

Pull Request Test Coverage Report for Build 156

0 of 0 changed or added relevant lines in 0 files are covered.
No unchanged relevant lines lost coverage.
Overall coverage remained the same at 100.0%

Totals
Change from base Build 152:	0.0%
Covered Lines:	408
Relevant Lines:	408

💛 - Coveralls

aorfanos commented 3 years ago

hey @stephen-soltesz , happy to contribute to such an amazing project :)

Regarding this:

-w -s -extldflags '-static'

The flags -w -s are used to decrease image size by not including debugging information and the symbol table on the created executable. Flag extldflags static use was to create a static binary including libraries at build time, but after checking it does not contribute to the executable size reduction I have removed it.