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Pin peribolos image by digest, tracked by Dependabot #16

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Merged
banesullivan merged 2 commits into from
May 23, 2026
Merged

Pin peribolos image by digest, tracked by Dependabot #16

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926459f
Pin peribolos image by digest
banesullivan May 23, 2026
a27017a
Track peribolos image digest with Dependabot
banesullivan May 23, 2026
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9 changes: 9 additions & 0 deletions .github/dependabot.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -12,3 +12,12 @@ updates:
- "*"
commit-message:
prefix: "ci"

- package-ecosystem: docker
directory: /docker/peribolos
schedule:
interval: monthly
cooldown:
default-days: 7
commit-message:
prefix: "ci"
6 changes: 6 additions & 0 deletions docker/peribolos/Dockerfile
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@@ -0,0 +1,6 @@
# Pin of the peribolos image consumed by scripts/run-peribolos.sh.
#
# This Dockerfile exists solely to give Dependabot's `docker` ecosystem a
# file to watch — see .github/dependabot.yml. The script parses the FROM
# line below; it does not run `docker build`.
FROM us-docker.pkg.dev/k8s-infra-prow/images/peribolos@sha256:6978d5adbb75487cbdb9088eef1437acd8a93a6e75f01abe76c5d0fca853bba8
12 changes: 11 additions & 1 deletion scripts/run-peribolos.sh
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Expand Up @@ -26,7 +26,17 @@ if [[ $MODE == "apply" && ${GITHUB_ACTIONS:-} == "true" && ${GITHUB_REF:-} != "r
exit 1
fi

PERIBOLOS_IMAGE="us-docker.pkg.dev/k8s-infra-prow/images/peribolos:latest"
# Peribolos image is pinned by digest in docker/peribolos/Dockerfile so
# Dependabot's `docker` ecosystem (see .github/dependabot.yml) can open PRs
# when a new digest is available. Parse the FROM line so the digest lives
# in exactly one place.
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PERIBOLOS_DOCKERFILE="$SCRIPT_DIR/../docker/peribolos/Dockerfile"
PERIBOLOS_IMAGE="$(awk '/^FROM / {print $2; exit}' "$PERIBOLOS_DOCKERFILE")"
if [[ -z $PERIBOLOS_IMAGE ]]; then
echo "ERROR: failed to parse FROM line from $PERIBOLOS_DOCKERFILE" >&2
exit 1
fi

if [[ -z ${GITHUB_TOKEN:-} ]]; then
echo "ERROR: GITHUB_TOKEN environment variable is required." >&2
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