Chainguard Image for etcd
etcd Distributed reliable key-value store for the most critical data of a distributed system
Chainguard Images are regularly-updated, minimal container images with low-to-zero CVEs.
Download this Image
This image is available on cgr.dev:
docker pull cgr.dev/ORGANIZATION/etcd:latest
Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard registry.
Using etcd
The default listening ports in etcd are 2379 and 2380.
To run a container listening on these ports, try:
docker run -p 2379:2379 -p 2380:2380 --rm cgr.dev/chainguard/etcd
{"level":"info","ts":"2022-12-27T15:56:52.651Z","caller":"etcdmain/etcd.go:73","msg":"Running: ","args":["etcd"]}
{"level":"warn","ts":"2022-12-27T15:56:52.651Z","caller":"etcdmain/etcd.go:105","msg":"'data-dir' was empty; using default","data-dir":"default.etcd"}
{"level":"info","ts":"2022-12-27T15:56:52.651Z","caller":"embed/etcd.go:124","msg":"configuring peer listeners","listen-peer-urls":["http://localhost:2380"]}
{"level":"info","ts":"2022-12-27T15:56:52.652Z","caller":"embed/etcd.go:132","msg":"configuring client listeners","listen-client-urls":["http://localhost:2379"]}
{"level":"info","ts":"2022-12-27T15:56:52.652Z","caller":"embed/etcd.go:306","msg":"starting an etcd server","etcd-version":"3.5.6","git-sha":"0a7cb3c","go-version":"go1.19.4","go-os":"linux","go-arch":"arm64","max-cpu-set":8,"max-cpu-available":8,"member-initialized":false,"name":"default","data-dir":"default.etcd","wal-dir":"","wal-dir-dedicated":"","member-dir":"default.etcd/member","force-new-cluster":false,"heartbeat-interval":"100ms","election-timeout":"1s","initial-election-tick-advance":true,"snapshot-count":100000,"max-wals":5,"max-snapshots":5,"snapshot-catchup-entries":5000,"initial-advertise-peer-urls":["http://localhost:2380"],"listen-peer-urls":["http://localhost:2380"],"advertise-client-urls":["http://localhost:2379"],"listen-client-urls":["http://localhost:2379"],"listen-metrics-urls":[],"cors":["*"],"host-whitelist":["*"],"initial-cluster":"default=http://localhost:2380","initial-cluster-state":"new","initial-cluster-token":"etcd-cluster","quota-backend-bytes":2147483648,"max-request-bytes":1572864,"max-concurrent-streams":4294967295,"pre-vote":true,"initial-corrupt-check":false,"corrupt-check-time-interval":"0s","compact-check-time-enabled":false,"compact-check-time-interval":"1m0s","auto-compaction-mode":"periodic","auto-compaction-retention":"0s","auto-compaction-interval":"0s","discovery-url":"","discovery-proxy":"","downgrade-check-interval":"5s"}
{"level":"info","ts":"2022-12-27T15:56:52.657Z","caller":"etcdserver/backend.go:81","msg":"opened backend db","path":"default.etcd/member/snap/db","took":"4.238167ms"}
{"level":"info","ts":"2022-12-27T15:56:52.664Z","caller":"etcdserver/raft.go:494","msg":"starting local member","local-member-id":"8e9e05c52164694d","cluster-id":"cdf818194e3a8c32"}
{"level":"info","ts":"2022-12-27T15:56:52.664Z","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d switched to configuration voters=()"}
{"level":"info","ts":"2022-12-27T15:56:52.664Z","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d became follower at term 0"}
{"level":"info","ts":"2022-12-27T15:56:52.664Z","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"newRaft 8e9e05c52164694d [peers: [], term: 0, commit: 0, applied: 0, lastindex: 0, lastterm: 0]"}
{"level":"info","ts":"2022-12-27T15:56:52.664Z","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d became follower at term 1"}
{"level":"info","ts":"2022-12-27T15:56:52.665Z","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d switched to configuration voters=(10276657743932975437)"}
{"level":"warn","ts":"2022-12-27T15:56:52.674Z","caller":"auth/store.go:1234","msg":"simple token is not cryptographically signed"}
{"level":"info","ts":"2022-12-27T15:56:52.680Z","caller":"mvcc/kvstore.go:393","msg":"kvstore restored","current-rev":1}
{"level":"info","ts":"2022-12-27T15:56:52.681Z","caller":"etcdserver/quota.go:94","msg":"enabled backend quota with default value","quota-name":"v3-applier","quota-size-bytes":2147483648,"quota-size":"2.1 GB"}
{"level":"info","ts":"2022-12-27T15:56:52.686Z","caller":"etcdserver/server.go:854","msg":"starting etcd server","local-member-id":"8e9e05c52164694d","local-server-version":"3.5.6","cluster-version":"to_be_decided"}
{"level":"info","ts":"2022-12-27T15:56:52.688Z","caller":"etcdserver/server.go:738","msg":"started as single-node; fast-forwarding election ticks","local-member-id":"8e9e05c52164694d","forward-ticks":9,"forward-duration":"900ms","election-ticks":10,"election-timeout":"1s"}
{"level":"info","ts":"2022-12-27T15:56:52.688Z","caller":"fileutil/purge.go:44","msg":"started to purge file","dir":"default.etcd/member/snap","suffix":"snap.db","max":5,"interval":"30s"}
{"level":"info","ts":"2022-12-27T15:56:52.688Z","caller":"fileutil/purge.go:44","msg":"started to purge file","dir":"default.etcd/member/snap","suffix":"snap","max":5,"interval":"30s"}
{"level":"info","ts":"2022-12-27T15:56:52.688Z","caller":"fileutil/purge.go:44","msg":"started to purge file","dir":"default.etcd/member/wal","suffix":"wal","max":5,"interval":"30s"}
{"level":"info","ts":"2022-12-27T15:56:52.694Z","caller":"embed/etcd.go:275","msg":"now serving peer/client/metrics","local-member-id":"8e9e05c52164694d","initial-advertise-peer-urls":["http://localhost:2380"],"listen-peer-urls":["http://localhost:2380"],"advertise-client-urls":["http://localhost:2379"],"listen-client-urls":["http://localhost:2379"],"listen-metrics-urls":[]}
{"level":"info","ts":"2022-12-27T15:56:52.694Z","caller":"embed/etcd.go:586","msg":"serving peer traffic","address":"127.0.0.1:2380"}
{"level":"info","ts":"2022-12-27T15:56:52.696Z","caller":"embed/etcd.go:558","msg":"cmux::serve","address":"127.0.0.1:2380"}
Users and Directories
By default this image runs as a non-root user named etcd with a uid of 65532.
The default data directory for this image is /var/lib/etcd, and that directory is write-able by the etcd user.
If you change the user, UID, or data directory, you'll need to ensure the user running the etcd process has permissions to that
directory.
Contact Support
If you have a Zendesk account (typically set up for you by your Customer Success Manager) you can reach out to Chainguard's Customer Success team through our Zendesk portal.
What are Chainguard Images?
Chainguard Images are a collection of container images designed for security and minimalism.
Many Chainguard Images are distroless; they contain only an open-source application and its runtime dependencies. These images do not even contain a shell or package manager. Chainguard Images are built with Wolfi, our Linux undistro designed to produce container images that meet the requirements of a secure software supply chain.
The main features of Chainguard Images include:
-dev Variants
As mentioned previously, Chainguard’s distroless Images have no shell or package manager by default. This is great for security, but sometimes you need these things, especially in builder images. For those cases, most (but not all) Chainguard Images come paired with a -dev variant which does include a shell and package manager.
Although the -dev image variants have similar security features as their distroless versions, such as complete SBOMs and signatures, they feature additional software that is typically not necessary in production environments. The general recommendation is to use the -dev variants only to build the application and then copy all application artifacts into a distroless image, which will result in a final container image that has a minimal attack surface and won’t allow package installations or logins.
That being said, it’s worth noting that -dev variants of Chainguard Images are completely fine to run in production environments. After all, the -dev variants are still more secure than many popular container images based on fully-featured operating systems such as Debian and Ubuntu since they carry less software, follow a more frequent patch cadence, and offer attestations for what they include.
Learn More
To better understand how to work with Chainguard Images, we encourage you to visit Chainguard Academy, our documentation and education platform.
