README
¶
etcd
etcd is a distributed, consistent key-value store for shared configuration and service discovery, 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 easiest way to get etcd is to install one of the pre-built binaries from the tagged releases: instructions are available on GitHub.
For those wanting to try the very latest version, you can build the latest version of etcd from the master branch.
All development occurs on master, including new features and bug fixes.
Bug fixes are first targeted at master and subsequently ported to release branches, as described in the branch management guide.
Running etcd
First start a single-member cluster of etcd:
./bin/etcd
This will bring up etcd listening on port 2379 for client communication and on port 2380 for server-to-server communication.
Next, let's set a single key, and then retrieve it:
curl -L http://127.0.0.1:2379/v2/keys/mykey -XPUT -d value="this is awesome"
curl -L http://127.0.0.1:2379/v2/keys/mykey
You have successfully started an etcd and written a key to the store.
Running local etcd cluster
First install goreman, which manages Procfile-based applications.
Our Procfile script will set up a local example cluster. You can start it with:
goreman start
This will bring up 3 etcd members infra1, infra2 and infra3 and etcd proxy proxy, which runs locally and composes a cluster.
You can write a key to the cluster and retrieve the value back from any member or proxy.
Next Steps
Now it's time to dig into the full etcd API and other guides.
- Explore the full API.
- Set up a multi-machine cluster.
- Learn the config format, env variables and flags.
- Find language bindings and tools.
- Use TLS to secure an etcd cluster.
- Tune etcd.
- Upgrade from 0.4.6 to 2.0.0.
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://127.0.0.1:2379/version
API Versioning
The v2 API responses should not change after the 2.0.0 release but new features will be added over time.
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.
Documentation
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There is no documentation for this package.
Source Files
Directories
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| Path | Synopsis |
|---|---|
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Godeps
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_workspace/src/bitbucket.org/ww/goautoneg
HTTP Content-Type Autonegotiation.
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HTTP Content-Type Autonegotiation. |
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_workspace/src/github.com/beorn7/perks/quantile
Package quantile computes approximate quantiles over an unbounded data stream within low memory and CPU bounds.
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Package quantile computes approximate quantiles over an unbounded data stream within low memory and CPU bounds. |
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_workspace/src/github.com/boltdb/bolt
Package bolt implements a low-level key/value store in pure Go.
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Package bolt implements a low-level key/value store in pure Go. |
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_workspace/src/github.com/codegangsta/cli
Package cli provides a minimal framework for creating and organizing command line Go applications.
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Package cli provides a minimal framework for creating and organizing command line Go applications. |
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_workspace/src/github.com/gogo/protobuf/proto
Package proto converts data structures to and from the wire format of protocol buffers.
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Package proto converts data structures to and from the wire format of protocol buffers. |
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_workspace/src/github.com/golang/protobuf/proto
Package proto converts data structures to and from the wire format of protocol buffers.
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Package proto converts data structures to and from the wire format of protocol buffers. |
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_workspace/src/github.com/google/btree
Package btree implements in-memory B-Trees of arbitrary degree.
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Package btree implements in-memory B-Trees of arbitrary degree. |
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_workspace/src/github.com/matttproud/golang_protobuf_extensions/pbutil
Package pbutil provides record length-delimited Protocol Buffer streaming.
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Package pbutil provides record length-delimited Protocol Buffer streaming. |
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_workspace/src/github.com/prometheus/client_golang/model
Package model contains core representation of Prometheus client primitives.
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Package model contains core representation of Prometheus client primitives. |
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_workspace/src/github.com/prometheus/client_golang/prometheus
Package prometheus provides embeddable metric primitives for servers and standardized exposition of telemetry through a web services interface.
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Package prometheus provides embeddable metric primitives for servers and standardized exposition of telemetry through a web services interface. |
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_workspace/src/github.com/prometheus/client_golang/text
Package text contains helper functions to parse and create text-based exchange formats.
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Package text contains helper functions to parse and create text-based exchange formats. |
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_workspace/src/github.com/prometheus/client_model/go
Package io_prometheus_client is a generated protocol buffer package.
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Package io_prometheus_client is a generated protocol buffer package. |
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_workspace/src/github.com/prometheus/procfs
Package procfs provides functions to retrieve system, kernel and process metrics from the pseudo-filesystem proc.
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Package procfs provides functions to retrieve system, kernel and process metrics from the pseudo-filesystem proc. |
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_workspace/src/github.com/ugorji/go/codec
High Performance, Feature-Rich Idiomatic Go codec/encoding library for binc, msgpack, cbor, json.
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High Performance, Feature-Rich Idiomatic Go codec/encoding library for binc, msgpack, cbor, json. |
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_workspace/src/github.com/ugorji/go/codec/codecgen
codecgen generates codec.Selfer implementations for a set of types.
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codecgen generates codec.Selfer implementations for a set of types. |
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_workspace/src/golang.org/x/crypto/bcrypt
Package bcrypt implements Provos and Mazières's bcrypt adaptive hashing algorithm.
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Package bcrypt implements Provos and Mazières's bcrypt adaptive hashing algorithm. |
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_workspace/src/golang.org/x/crypto/blowfish
Package blowfish implements Bruce Schneier's Blowfish encryption algorithm.
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Package blowfish implements Bruce Schneier's Blowfish encryption algorithm. |
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_workspace/src/golang.org/x/net/context
Package context defines the Context type, which carries deadlines, cancelation signals, and other request-scoped values across API boundaries and between processes.
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Package context defines the Context type, which carries deadlines, cancelation signals, and other request-scoped values across API boundaries and between processes. |
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Package client provides bindings for the etcd APIs.
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Package client provides bindings for the etcd APIs. |
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Package discovery provides an implementation of the cluster discovery that is used by etcd.
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Package discovery provides an implementation of the cluster discovery that is used by etcd. |
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error package describes errors in etcd project.
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error package describes errors in etcd project. |
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etcdserverpb
Package etcdserverpb is a generated protocol buffer package.
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Package etcdserverpb is a generated protocol buffer package. |
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Package integration implements tests built upon embedded etcd, and focus on etcd correctness.
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Package integration implements tests built upon embedded etcd, and focus on etcd correctness. |
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etcd4pb
Package protobuf is a generated protocol buffer package.
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Package protobuf is a generated protocol buffer package. |
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pkg
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Package raft provides an implementation of the raft consensus algorithm.
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Package raft provides an implementation of the raft consensus algorithm. |
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raftpb
Package raftpb is a generated protocol buffer package.
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Package raftpb is a generated protocol buffer package. |
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snappb
Package snappb is a generated protocol buffer package.
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Package snappb is a generated protocol buffer package. |
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storagepb
Package storagepb is a generated protocol buffer package.
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Package storagepb is a generated protocol buffer package. |
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tools
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Package wal provides an implementation of a write ahead log that is used by etcd.
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Package wal provides an implementation of a write ahead log that is used by etcd. |
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walpb
Package walpb is a generated protocol buffer package.
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Package walpb is a generated protocol buffer package. |