fix: replace unmaintained watchtower with nicholas-fedor fork - #851
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kacper-wolkiewicz-reef merged 1 commit intoAug 5, 2026
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The original containrrr/watchtower was archived in December 2025 and its Docker API client (v1.25) is rejected by modern Docker engines, breaking automatic updates. The nicholas-fedor/watchtower fork is actively maintained, supports current Docker API versions and is a drop-in replacement - it keeps the com.centurylinklabs.watchtower.* labels and all the flags we use. Impacts: miner, miner-runner, validator, validator-runner
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Why
The original
containrrr/watchtowerwas archived on December 17, 2025. Its embedded Docker API client (v1.25) is rejected by modern Docker engines (Docker 26 dropped old API versions, Docker 29 requires v1.44+), which breaks automatic container updates on hosts running a current Docker.What
Replace
containrrr/watchtower:latestwith the actively maintained forknicholas-fedor/watchtower(imagenickfedor/watchtower), pinned to1.20.3:install_miner.sh/install_validator.sh— compose template written to operators' hostsminer/envs/runner/README.md/validator/envs/runner/README.md— compose snippets in docsminer/envs/runner/data/docker-compose.yml— docuum--keeppattern for the watchtower imageThe fork is a drop-in replacement: it keeps the
com.centurylinklabs.watchtower.*labels and the--interval,--cleanup,--label-enableflags, and supports Docker API v1.43+ with auto-negotiation. Releases are frequent (latest v1.20.3, 2026-08-05).Note for existing deployments
The watchtower service lives in the host-side compose file created at install time, so existing miners/validators won't pick this up by pushing new images — operators whose auto-update channel is already broken by a new Docker version need a one-time manual migration (update the image in their
docker-compose.ymlanddocker compose up -d watchtower).🤖 Generated with Claude Code