README
¶
etcd
Note: The master branch may be in an unstable or even broken state during development. Please use releases instead of the master branch in order to get stable binaries.
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.
etcd is used in production by many companies, and the development team stands behind it in critical deployment scenarios, where etcd is frequently teamed with applications such as Kubernetes, fleet, locksmith, vulcand, and many others.
See etcdctl for a simple command line client.
Or feel free to just use curl, as in the examples below.
Getting Started
Getting etcd
The easiest way to get etcd is to use one of the pre-built release binaries which are available for OSX, Linux, Windows, AppC (ACI), and Docker. Instructions for using these binaries are on the GitHub releases page.
For those wanting to try the very latest version, you can build the latest version of etcd from the master branch.
You will first need Go installed on your machine (version 1.4+ is required).
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 0.4.9+ to 2.2.0.
Contact
- Mailing list: etcd-dev
- IRC: #etcd on freenode.org
- Planning/Roadmap: milestones, roadmap
- Bugs: issues
Contributing
See CONTRIBUTING for details on submitting patches and the contribution workflow.
Reporting bugs
See reporting bugs for details about reporting any issue you may encounter.
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
¶
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/akrennmair/gopcap
Interface to both live and offline pcap parsing.
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Interface to both live and offline pcap parsing. |
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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/coreos/go-systemd/daemon
Code forked from Docker project
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Code forked from Docker project |
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_workspace/src/github.com/coreos/go-systemd/journal
Package journal provides write bindings to the systemd journal
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Package journal provides write bindings to the systemd journal |
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_workspace/src/github.com/coreos/go-systemd/util
Package util contains utility functions related to systemd that applications can use to check things like whether systemd is running.
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Package util contains utility functions related to systemd that applications can use to check things like whether systemd is running. |
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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/gogo/protobuf/proto/proto3_proto
Package proto3_proto is a generated protocol buffer package.
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Package proto3_proto is a generated protocol buffer package. |
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_workspace/src/github.com/golang/glog
Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup.
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Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup. |
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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/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_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/common/expfmt
A package for reading and writing Prometheus metrics.
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A package for reading and writing Prometheus metrics. |
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_workspace/src/github.com/prometheus/common/model
Package model contains common data structures that are shared across Prometheus componenets and libraries.
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Package model contains common data structures that are shared across Prometheus componenets and libraries. |
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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/russross/blackfriday
Blackfriday markdown processor.
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Blackfriday markdown processor. |
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_workspace/src/github.com/shurcooL/sanitized_anchor_name
Package sanitized_anchor_name provides a func to create sanitized anchor names.
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Package sanitized_anchor_name provides a func to create sanitized anchor names. |
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_workspace/src/github.com/spf13/cobra
Package cobra is a commander providing a simple interface to create powerful modern CLI interfaces.
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Package cobra is a commander providing a simple interface to create powerful modern CLI interfaces. |
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_workspace/src/github.com/spf13/pflag
Package pflag is a drop-in replacement for Go's flag package, implementing POSIX/GNU-style --flags.
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Package pflag is a drop-in replacement for Go's flag package, implementing POSIX/GNU-style --flags. |
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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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_workspace/src/golang.org/x/net/netutil
Package netutil provides network utility functions, complementing the more common ones in the net package.
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Package netutil provides network utility functions, complementing the more common ones in the net package. |
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_workspace/src/golang.org/x/oauth2
Package oauth2 provides support for making OAuth2 authorized and authenticated HTTP requests.
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Package oauth2 provides support for making OAuth2 authorized and authenticated HTTP requests. |
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_workspace/src/golang.org/x/oauth2/facebook
Package facebook provides constants for using OAuth2 to access Facebook.
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Package facebook provides constants for using OAuth2 to access Facebook. |
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_workspace/src/golang.org/x/oauth2/github
Package github provides constants for using OAuth2 to access Github.
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Package github provides constants for using OAuth2 to access Github. |
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_workspace/src/golang.org/x/oauth2/google
Package google provides support for making OAuth2 authorized and authenticated HTTP requests to Google APIs.
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Package google provides support for making OAuth2 authorized and authenticated HTTP requests to Google APIs. |
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_workspace/src/golang.org/x/oauth2/internal
Package internal contains support packages for oauth2 package.
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Package internal contains support packages for oauth2 package. |
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_workspace/src/golang.org/x/oauth2/jws
Package jws provides encoding and decoding utilities for signed JWS messages.
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Package jws provides encoding and decoding utilities for signed JWS messages. |
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_workspace/src/golang.org/x/oauth2/jwt
Package jwt implements the OAuth 2.0 JSON Web Token flow, commonly known as "two-legged OAuth 2.0".
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Package jwt implements the OAuth 2.0 JSON Web Token flow, commonly known as "two-legged OAuth 2.0". |
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_workspace/src/golang.org/x/oauth2/linkedin
Package linkedin provides constants for using OAuth2 to access LinkedIn.
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Package linkedin provides constants for using OAuth2 to access LinkedIn. |
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_workspace/src/golang.org/x/oauth2/odnoklassniki
Package odnoklassniki provides constants for using OAuth2 to access Odnoklassniki.
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Package odnoklassniki provides constants for using OAuth2 to access Odnoklassniki. |
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_workspace/src/golang.org/x/oauth2/paypal
Package paypal provides constants for using OAuth2 to access PayPal.
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Package paypal provides constants for using OAuth2 to access PayPal. |
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_workspace/src/golang.org/x/oauth2/vk
Package vk provides constants for using OAuth2 to access VK.com.
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Package vk provides constants for using OAuth2 to access VK.com. |
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_workspace/src/golang.org/x/sys/unix
Package unix contains an interface to the low-level operating system primitives.
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Package unix contains an interface to the low-level operating system primitives. |
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_workspace/src/google.golang.org/cloud/compute/metadata
Package metadata provides access to Google Compute Engine (GCE) metadata and API service accounts.
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Package metadata provides access to Google Compute Engine (GCE) metadata and API service accounts. |
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_workspace/src/google.golang.org/cloud/internal
Package internal provides support for the cloud packages.
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Package internal provides support for the cloud packages. |
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_workspace/src/google.golang.org/cloud/internal/datastore
Package datastore is a generated protocol buffer package.
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Package datastore is a generated protocol buffer package. |
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_workspace/src/google.golang.org/cloud/internal/testutil
Package testutil contains helper functions for writing tests.
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Package testutil contains helper functions for writing tests. |
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_workspace/src/google.golang.org/grpc
Package grpc implements an RPC system called gRPC.
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Package grpc implements an RPC system called gRPC. |
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_workspace/src/google.golang.org/grpc/benchmark
Package benchmark implements the building blocks to setup end-to-end gRPC benchmarks.
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Package benchmark implements the building blocks to setup end-to-end gRPC benchmarks. |
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_workspace/src/google.golang.org/grpc/benchmark/grpc_testing
Package grpc_testing is a generated protocol buffer package.
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Package grpc_testing is a generated protocol buffer package. |
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_workspace/src/google.golang.org/grpc/codes
Package codes defines the canonical error codes used by gRPC.
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Package codes defines the canonical error codes used by gRPC. |
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_workspace/src/google.golang.org/grpc/credentials
Package credentials implements various credentials supported by gRPC library, which encapsulate all the state needed by a client to authenticate with a server and make various assertions, e.g., about the client's identity, role, or whether it is authorized to make a particular call.
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Package credentials implements various credentials supported by gRPC library, which encapsulate all the state needed by a client to authenticate with a server and make various assertions, e.g., about the client's identity, role, or whether it is authorized to make a particular call. |
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_workspace/src/google.golang.org/grpc/examples/route_guide/client
Package main implements a simple gRPC client that demonstrates how to use gRPC-Go libraries to perform unary, client streaming, server streaming and full duplex RPCs.
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Package main implements a simple gRPC client that demonstrates how to use gRPC-Go libraries to perform unary, client streaming, server streaming and full duplex RPCs. |
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_workspace/src/google.golang.org/grpc/examples/route_guide/proto
Package proto is a generated protocol buffer package.
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Package proto is a generated protocol buffer package. |
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_workspace/src/google.golang.org/grpc/examples/route_guide/server
Package main implements a simple gRPC server that demonstrates how to use gRPC-Go libraries to perform unary, client streaming, server streaming and full duplex RPCs.
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Package main implements a simple gRPC server that demonstrates how to use gRPC-Go libraries to perform unary, client streaming, server streaming and full duplex RPCs. |
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_workspace/src/google.golang.org/grpc/grpclog
Package log defines logging for grpc.
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Package log defines logging for grpc. |
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_workspace/src/google.golang.org/grpc/interop/grpc_testing
Package grpc_testing is a generated protocol buffer package.
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Package grpc_testing is a generated protocol buffer package. |
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_workspace/src/google.golang.org/grpc/metadata
Package metadata define the structure of the metadata supported by gRPC library.
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Package metadata define the structure of the metadata supported by gRPC library. |
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_workspace/src/google.golang.org/grpc/test/codec_perf
Package codec_perf is a generated protocol buffer package.
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Package codec_perf is a generated protocol buffer package. |
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_workspace/src/google.golang.org/grpc/test/grpc_testing
Package grpc_testing is a generated protocol buffer package.
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Package grpc_testing is a generated protocol buffer package. |
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_workspace/src/google.golang.org/grpc/transport
Package transport defines and implements message oriented communication channel to complete various transactions (e.g., an RPC).
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Package transport defines and implements message oriented communication channel to complete various transactions (e.g., an RPC). |
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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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contrib
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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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etcdctl is a command line application that controls etcd.
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etcdctl is a command line application that controls etcd. |
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command
Package command is a set of libraries for etcdctl commands.
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Package command is a set of libraries for etcdctl commands. |
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etcdctlv3 is a command line application that utilizes v3 API.
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etcdctlv3 is a command line application that utilizes v3 API. |
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command
Package command is a set of libraries for etcd v3 commands.
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Package command is a set of libraries for etcd v3 commands. |
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Package etcdmain contains the main entry point for the etcd binary.
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Package etcdmain contains the main entry point for the etcd binary. |
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Package etcdserver defines how etcd servers interact and store their states.
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Package etcdserver defines how etcd servers interact and store their states. |
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api/v3rpc
Package v3rpc implements etcd v3 RPC system based on gRPC.
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Package v3rpc implements etcd v3 RPC system based on gRPC. |
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auth
Package auth implements etcd authentication.
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Package auth implements etcd authentication. |
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etcdhttp
Package etcdhttp provides etcd client and server implementations.
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Package etcdhttp provides etcd client and server implementations. |
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etcdhttp/httptypes
Package httptypes defines how etcd's HTTP API entities are serialized to and deserialized from JSON.
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Package httptypes defines how etcd's HTTP API entities are serialized to and deserialized from JSON. |
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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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stats
Package stats defines a standard interface for etcd cluster statistics.
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Package stats defines a standard interface for etcd cluster statistics. |
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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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pkg
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cors
Package cors handles cross-origin HTTP requests (CORS).
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Package cors handles cross-origin HTTP requests (CORS). |
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crc
Package crc provides utility function for cyclic redundancy check algorithms.
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Package crc provides utility function for cyclic redundancy check algorithms. |
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fileutil
Package fileutil implements utility functions related to files and paths.
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Package fileutil implements utility functions related to files and paths. |
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flags
Package flags implements command-line flag parsing.
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Package flags implements command-line flag parsing. |
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httputil
Package httputil provides HTTP utility functions.
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Package httputil provides HTTP utility functions. |
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idutil
Package idutil implements utility functions for generating unique, randomized ids.
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Package idutil implements utility functions for generating unique, randomized ids. |
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ioutil
Package ioutil implements I/O utility functions.
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Package ioutil implements I/O utility functions. |
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logutil
Package logutil includes utilities to faciliate logging.
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Package logutil includes utilities to faciliate logging. |
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netutil
Package netutil implements network-related utility functions.
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Package netutil implements network-related utility functions. |
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osutil
Package osutil implements operating system-related utility functions.
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Package osutil implements operating system-related utility functions. |
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pathutil
Package pathutil implements utility functions for handling slash-separated paths.
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Package pathutil implements utility functions for handling slash-separated paths. |
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pbutil
Package pbutil defines interfaces for handling Protocol Buffer objects.
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Package pbutil defines interfaces for handling Protocol Buffer objects. |
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runtime
Package runtime implements utility functions for runtime systems.
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Package runtime implements utility functions for runtime systems. |
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testutil
Package testutil provides test utility functions.
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Package testutil provides test utility functions. |
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timeutil
Package timeutil providese time-related utility functions.
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Package timeutil providese time-related utility functions. |
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transport
Package transport implements various HTTP transport utilities based on Go net package.
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Package transport implements various HTTP transport utilities based on Go net package. |
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types
Package types declares various data types and implements type-checking functions.
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Package types declares various data types and implements type-checking functions. |
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wait
Package wait provides utility functions for polling, listening using Go channel.
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Package wait provides utility functions for polling, listening using Go channel. |
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Package proxy implements etcd proxy node.
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Package proxy implements etcd proxy node. |
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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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rafttest
Package rafttest provides functional tests for etcd's raft implementation.
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Package rafttest provides functional tests for etcd's raft implementation. |
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Package rafthttp implements HTTP transportation layer for etcd/raft pkg.
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Package rafthttp implements HTTP transportation layer for etcd/raft pkg. |
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Package snap stores raft nodes' states with snapshots.
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Package snap stores raft nodes' states with snapshots. |
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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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Package storage defines etcd's stable storage.
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Package storage defines etcd's stable storage. |
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backend
Package backend defines a standard interface for etcd's backend storage.
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Package backend defines a standard interface for etcd's backend storage. |
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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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Package store defines etcd's in-memory key/value store.
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Package store defines etcd's in-memory key/value store. |
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tools
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Package version implements etcd version parsing and contains latest version information.
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Package version implements etcd version parsing and contains latest version information. |
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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. |
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