| commit | ec8679754934184d9a9070740121eb67eacf6bbe | [log] [tgz] |
|---|---|---|
| author | Luca Milanesio <luca.milanesio@gmail.com> | Mon Jun 12 22:43:56 2023 +0100 |
| committer | Luca Milanesio <luca.milanesio@gmail.com> | Mon Jun 12 23:01:46 2023 +0100 |
| tree | dbaa182407e7df0c76e5ccd966abd899d6c9b6c9 | |
| parent | d3e09cadee6a0bcee00009a725722ded0f2f5b9b [diff] | |
| parent | 7f920df41a4f436c7945611c4c3a1f20ae823d16 [diff] |
Merge branch 'stable-3.5' into stable-3.6 * stable-3.5: Use msec-level precision for refs/multi-site/version value Create replication lag metric per repository Fix errorprone errors [FloggerLogString] Allow running docker with sudo Use docker compose v2 format Move EventHandler binding from lib module to plugin module Do not forward indexing events from pull-replication/apply-object Add pull-replication plugin in local environment test Release-Notes: skip Change-Id: Id5a7a478c7e73578821408966b288c5949bf0174
This plugin allows to deploy a distributed cluster of multiple Gerrit masters each using a separate site without sharing any storage. The alignment between the masters happens using the replication plugin and an external message broker.
Requirements for the Gerrit masters are:
NOTE: The multi-site plugin will not start if Gerrit is not yet migrated to NoteDb.
Supports multiple read/write masters across multiple sites across different geographic locations. The Gerrit nodes are kept synchronized between each other using the replication plugin and a global ref-database in order to detect and prevent split-brains.
For more details on the overall multi-site design and roadmap, please refer to the multi-site plugin DESIGN.md document
This plugin is released under the same Apache 2.0 license and copyright holders as of the Gerrit Code Review project.
The multi-site plugin can only be built in tree mode, by cloning Gerrit and the multi-site plugin code, and checking them out on the desired branch.
Example of cloning Gerrit and multi-site for a stable-2.16 build:
git clone -b stable-2.16 https://gerrit.googlesource.com/gerrit git clone -b stable-2.16 https://gerrit.googlesource.com/plugins/multi-site cd gerrit/plugins ln -s ../../multi-site . rm external_plugin_deps.bzl ln -s multi-site/external_plugin_deps.bzl .
Example of building the multi-site plugin:
cd gerrit bazel build plugins/multi-site
The multi-site.jar plugin is generated to bazel-bin/plugins/multi-site/multi-site.jar.
Example of testing the multi-site plugin:
cd gerrit bazel test plugins/multi-site:multi_site_tests
NOTE: The multi-site tests include also the use of Docker containers for instantiating and using a Kafka/Zookeeper broker. Make sure you have a Docker daemon running (/var/run/docker.sock accessible) or a DOCKER_HOST pointing to a Docker server.
Each Gerrit server of the cluster must be identified with a globally unique instance-id defined in $GERRIT_SITE/etc/gerrit.config. When migrating from a multi-site configuration with Gerrit v3.3 or earlier, you must reuse the instance-id value stored under $GERRIT_SITE/data/multi-site.
Example:
[gerrit] instanceId = 758fe5b7-1869-46e6-942a-3ae0ae7e3bd2
Install the multi-site plugin into the $GERRIT_SITE/lib directory of all the Gerrit servers that are part of the multi-site cluster. Create a symbolic link from $GERRIT_SITE/lib/multi-site.jar into the $GERRIT_SITE/plugins.
Add the multi-site module to $GERRIT_SITE/etc/gerrit.config as follows:
[gerrit] installDbModule = com.googlesource.gerrit.plugins.multisite.GitModule installModule = com.googlesource.gerrit.plugins.multisite.Module
For more details on the configuration settings, please refer to the multi-site configuration documentation.
You also need to setup the Git-level replication between nodes, for more details please refer to the replication plugin documentation.
For information about available HTTP endpoints please refer to the documentation.