Skip to content

✨ Disable DWARF and symbol table to decrease binary/image size#12856

Open
Sunnatillo wants to merge 1 commit intokubernetes-sigs:mainfrom
Nordix:Sunnatillo/decrease-image-size
Open

✨ Disable DWARF and symbol table to decrease binary/image size#12856
Sunnatillo wants to merge 1 commit intokubernetes-sigs:mainfrom
Nordix:Sunnatillo/decrease-image-size

Conversation

@Sunnatillo
Copy link
Contributor

@Sunnatillo Sunnatillo commented Oct 14, 2025 •
edited
Loading

What this PR does / why we need it:
This PR removes DWARF and symbol table from binaries by default and introduces an option including them by setting DBG=1 .

Current images

kubeadm-control-plane-controller-amd64   97.4MB
kubeadm-bootstrap-controller-amd64      88.9MB
cluster-api-controller-amd64   		95.2MB

After removing DWARF and symbol table

kubeadm-control-plane-controller-amd64   67.7MB
kubeadm-bootstrap-controller-amd64      61.9MB
cluster-api-controller-amd64            66.3MB

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #
#12855

@k8s-ci-robot k8s-ci-robot added the cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. label Oct 14, 2025
@k8s-ci-robot
Copy link
Contributor

k8s-ci-robot commented Oct 14, 2025

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign enxebre for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details Needs approval from an approver in each of these files:

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

@k8s-ci-robot k8s-ci-robot added the do-not-merge/needs-area PR is missing an area label label Oct 14, 2025
@k8s-ci-robot k8s-ci-robot added the size/S Denotes a PR that changes 10-29 lines, ignoring generated files. label Oct 14, 2025
@Sunnatillo Sunnatillo force-pushed the Sunnatillo/decrease-image-size branch from 94918a9 to e8d6c73 Compare October 14, 2025 11:48
@Sunnatillo
Disable DWARF and symbol table to decrease binary/image size
4fbbc69 
This commit introduces DBG variable which is used to control
including DWARF and symbol table for images/binaries
Signed-off-by: Sunnatillo <sunnat.samadov@est.tech>
@Sunnatillo Sunnatillo force-pushed the Sunnatillo/decrease-image-size branch from e8d6c73 to 4fbbc69 Compare October 14, 2025 11:53
sbueringer
sbueringer reviewed Oct 14, 2025
View reviewed changes
hack/version.sh
@@ -102,7 +102,12 @@ version::ldflags() {
add_ldflag "gitReleaseCommit" "${GIT_RELEASE_COMMIT}"

# The -ldflags parameter takes a single string, so join the output.
Copy link
Member

@sbueringer sbueringer Oct 14, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Let's check if that breaks using Tilt with the debugger. Probably not, but not entirely sure

Copy link
Contributor Author

@Sunnatillo Sunnatillo Oct 24, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

ldflags set in separate place for Tilt. it does not affect the tilt debugging.

cluster-api/Tiltfile

Line 224 in 490f76e

build_cmd = "{build_env} go build {build_options} -gcflags '{gcflags}' -ldflags '{ldflags}' -o .tiltbuild/bin/{binary_name} {go_main}".format(

Copy link
Contributor Author

@Sunnatillo Sunnatillo Oct 24, 2025

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Also tested and working fine.

@Sunnatillo
Copy link
Contributor Author

Sunnatillo commented Oct 30, 2025

/area misc

@k8s-ci-robot k8s-ci-robot added area/misc Issues or PRs not related to any other area and removed do-not-merge/needs-area PR is missing an area label labels Oct 30, 2025
@sbueringer
Copy link
Member

sbueringer commented Oct 30, 2025

Thx for the PR. I want to do some due diligence before merging it. Just probably won't find time to do it any time soon

@Sunnatillo
Copy link
Contributor Author

Sunnatillo commented Dec 8, 2025

/retest

1 similar comment
@Sunnatillo
Copy link
Contributor Author

Sunnatillo commented Dec 22, 2025

/retest

@Sunnatillo
Copy link
Contributor Author

Sunnatillo commented Jan 12, 2026

@sbueringer Please take a look when you have time.

@sbueringer
Copy link
Member

sbueringer commented Jan 14, 2026

Yup, will do!

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Reviewers

@sbueringer sbueringer sbueringer left review comments

@chrischdi chrischdi Awaiting requested review from chrischdi

@fabriziopandini fabriziopandini Awaiting requested review from fabriziopandini

Assignees

No one assigned

Labels

area/misc Issues or PRs not related to any other area cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. size/S Denotes a PR that changes 10-29 lines, ignoring generated files.

Projects

None yet

Milestone

No milestone

Development

Successfully merging this pull request may close these issues.

3 participants

@Sunnatillo @k8s-ci-robot @sbueringer