b29c512f50
* coreos/master: (27 commits) pkg/wait: move wait to pkg/wait etcdserver: do not add/remove/update local member to/from sender hub etcdserver: not record attributes when add member raft: add a test for proposeConfChange raft: block Stop() on n.done, support idempotency raft: add a test for node proposal integration: add increase cluster size test integration: remove unnecessary t.Testing argument raft: stop the node synchronously integration: fix test to propagate NewServer errors etcdserver: move peer URLs check to config etcdserver: ensure initial-advertise-peer-urls match initial-cluster raft: add a test for node.Tick raft: add comment string for TestNodeStart etcdserver: use member instead of node at etcd level raft: nodes return sorted ids raft: update unstable when calling stableTo with 0 *: support updating advertise-peer-url Users might want to update the peerurl of the etcd member in several cases. For example, if the IP address of the physical machine etcd running on is changed, user need to update the adversite-pee-rurl accordingly. This commit makes etcd support updating the advertise-peer-url of its members. transport: create a tls listener only if the tlsInfo is not empty and the scheme is HTTPS etcdserver: use member pointer for all tests ... Conflicts: etcdserver/server.go raft/log.go raft/log_test.go raft/node.go
etcd
WARNING
The current master branch of etcd is under heavy development in anticipation of the forthcoming 0.5.0 release.
It is strongly recommended that users work with the latest 0.4.x release (0.4.6), which can be found on the releases page.
Unless otherwise noted, the etcd documentation refers to configuring and running 0.4.x releases.
README version 0.4.6
A highly-available key value store for shared configuration and service discovery. etcd is inspired by Apache ZooKeeper and doozer, with a focus on being:
- Simple: curl'able user facing API (HTTP+JSON)
- Secure: optional SSL client cert authentication
- Fast: benchmarked 1000s of writes/s per instance
- Reliable: properly distributed using Raft
etcd is written in Go and uses the Raft consensus algorithm to manage a highly-available replicated log.
See etcdctl for a simple command line client. Or feel free to just use curl, as in the examples below.
If you're considering etcd for production use, please see: production-ready.md
Getting Started
Getting etcd
The latest release and setup instructions are available at GitHub.
Running etcd
First start a single-machine cluster of etcd:
./bin/etcd
This will bring up etcd listening on port 4001 for client communication and on port 7001 for server-to-server communication.
Next, let's set a single key, and then retrieve it:
curl -L http://127.0.0.1:4001/v2/keys/mykey -XPUT -d value="this is awesome"
curl -L http://127.0.0.1:4001/v2/keys/mykey
You have successfully started an etcd on a single machine and written a key to the store. Now it's time to dig into the full etcd API and other guides.
Next Steps
- Explore the full API.
- Set up a multi-machine cluster.
- Learn the config format, env variables and flags.
- Find language bindings and tools.
- Learn about the dashboard, lock and leader election modules.
- Use TLS to secure an etcd cluster.
- Tune etcd.
- Upgrade from old version.
Contact
- Mailing list: etcd-dev
- IRC: #coreos on freenode.org
- Planning/Roadmap: milestones
- Bugs: issues
Contributing
See CONTRIBUTING for details on submitting patches and the contribution workflow.
Project Details
Versioning
Service Versioning
etcd uses semantic versioning New minor versions may add additional features to the API.
You can get the version of etcd by issuing a request to /version:
curl -L http://127.0.0.1:4001/version
API Versioning
The v2 API responses should not change after the 0.2.0 release but new features will be added over time.
The v1 API has been deprecated and will not be supported.
During the pre-v1.0.0 series of releases we may break the API as we fix bugs and get feedback.
32-bit systems
etcd has known issues on 32-bit systems due to a bug in the Go runtime. See #358 for more information.
License
etcd is under the Apache 2.0 license. See the LICENSE file for details.