Version v3.6-DRAFT of the documentation is in DRAFT status. For the latest stable documentation, see v3.5.
There are following modules:
go.etcd.io/etcd/api/v3 - contains API definitions (like protos & proto-generated libraries) that defines communication protocol between etcd clients and server.
go.etcd.io/etcd/pkg/v3 - collection of utility packages used by etcd without being specific to etcd itself. A package belongs here only if it could possibly be moved out into its own repository in the future. Please avoid adding here code that has a lot of dependencies on its own, as they automatically becoming dependencies of the client library (that we want to keep lightweight).
go.etcd.io/etcd/client/v3 - client library used to contact etcd over the network (grpc). Recommended for all new usage of etcd.
go.etcd.io/etcd/client/v2 - legacy client library used to contact etcd over HTTP protocol. Deprecated. All new usage should depend on /v3 library.
go.etcd.io/etcd/raft/v3 - implementation of distributed consensus protocol. Should have no etcd specific code.
go.etcd.io/etcd/server/v3 - etcd implementation. The code in this package is etcd internal and should not be consumed by external projects. The package layout and API can change within the minor versions.
go.etcd.io/etcd/etcdctl/v3 - a command line tool to access and manage etcd.
go.etcd.io/etcd/tests/v3 - a module that contains all integration tests of etcd. Notice: All unit-tests (fast and not requiring cross-module dependencies) should be kept in the local modules to the code under the test.
go.etcd.io/bbolt - implementation of persistent b-tree. Hosted in a separate repository: https://github.com/etcd-io/bbolt.
All etcd modules should be released in the same versions, e.g.
email@example.com depend on
The consistent updating of versions can by performed using:
% DRY_RUN=false TARGET_VERSION="v3.5.10" ./scripts/release_mod.sh update_versions
The released modules should be tagged according to https://golang.org/ref/mod#vcs-version rules, i.e. each module should get its own tag. The tagging can be performed using:
% DRY_RUN=false REMOTE_REPO="origin" ./scripts/release_mod.sh push_mod_tags
All etcd modules should depend on the same versions of underlying dependencies. This can be verified using:
% PASSES="dep" ./test.sh
The go.mod files must not contain dependencies not being used and must conform to
go mod tidyformat. This is being verified by:
% PASSES="mod_tidy" ./test.sh
To trigger actions across all modules (e.g. auto-format all files), please use/expand the following script:
As a North Star, we would like to evaluate etcd modules towards following model:
- Splitting etcdmigrate/etcdadm out of etcdctl binary. Thanks to this etcdctl would become clearly a command-line wrapper around network client API, while etcdmigrate/etcdadm would support direct physical operations on the etcd storage files.
- Splitting etcd-proxy out of ./etcd binary, as it contains more experimental code so carries additional risk & dependencies.
- Deprecation of support for v2 protocol.
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.