944 lines
32 KiB
Markdown
944 lines
32 KiB
Markdown
---
|
|
stage: Create
|
|
group: Gitaly
|
|
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
|
|
type: reference
|
|
---
|
|
|
|
# Configure Gitaly **(FREE SELF)**
|
|
|
|
The Gitaly service itself is configured by using a [TOML configuration file](reference.md).
|
|
|
|
To change Gitaly settings:
|
|
|
|
**For Omnibus GitLab**
|
|
|
|
1. Edit `/etc/gitlab/gitlab.rb` and add or change the
|
|
[Gitaly settings](https://gitlab.com/gitlab-org/omnibus-gitlab/blob/1dd07197c7e5ae23626aad5a4a070a800b670380/files/gitlab-config-template/gitlab.rb.template#L1622-1676).
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
|
|
**For installations from source**
|
|
|
|
1. Edit `/home/git/gitaly/config.toml` and add or change the [Gitaly settings](https://gitlab.com/gitlab-org/gitaly/blob/master/config.toml.example).
|
|
1. Save the file and [restart GitLab](../restart_gitlab.md#installations-from-source).
|
|
|
|
The following configuration options are also available:
|
|
|
|
- Enabling [TLS support](#enable-tls-support).
|
|
- Configuring the [number of `gitaly-ruby` workers](#configure-number-of-gitaly-ruby-workers).
|
|
- Limiting [RPC concurrency](#limit-rpc-concurrency).
|
|
|
|
## Run Gitaly on its own server
|
|
|
|
By default, Gitaly is run on the same server as Gitaly clients and is
|
|
[configured as above](#configure-gitaly). Single-server installations are best served by
|
|
this default configuration used by:
|
|
|
|
- [Omnibus GitLab](https://docs.gitlab.com/omnibus/).
|
|
- The GitLab [source installation guide](../../install/installation.md).
|
|
|
|
However, Gitaly can be deployed to its own server, which can benefit GitLab installations that span
|
|
multiple machines.
|
|
|
|
NOTE:
|
|
When configured to run on their own servers, Gitaly servers
|
|
[must be upgraded](https://docs.gitlab.com/omnibus/update/#upgrading-gitaly-servers) before Gitaly
|
|
clients in your cluster.
|
|
|
|
The process for setting up Gitaly on its own server is:
|
|
|
|
1. [Install Gitaly](#install-gitaly).
|
|
1. [Configure authentication](#configure-authentication).
|
|
1. [Configure Gitaly servers](#configure-gitaly-servers).
|
|
1. [Configure Gitaly clients](#configure-gitaly-clients).
|
|
1. [Disable Gitaly where not required](#disable-gitaly-where-not-required-optional) (optional).
|
|
|
|
When running Gitaly on its own server, note the following regarding GitLab versions:
|
|
|
|
- From GitLab 11.4, Gitaly was able to serve all Git requests without requiring a shared NFS mount
|
|
for Git repository data, except for the
|
|
[Elasticsearch indexer](https://gitlab.com/gitlab-org/gitlab-elasticsearch-indexer).
|
|
- From GitLab 11.8, the Elasticsearch indexer also uses Gitaly for data access. NFS can still be
|
|
leveraged for redundancy on block-level Git data, but should be mounted only on the Gitaly
|
|
servers.
|
|
- From GitLab 11.8 to 12.2, it is possible to use Elasticsearch in a Gitaly setup that doesn't use
|
|
NFS. To use Elasticsearch in these versions, the
|
|
[repository indexer](../../integration/elasticsearch.md#elasticsearch-repository-indexer)
|
|
must be enabled in your GitLab configuration.
|
|
- [In GitLab 12.3 and later](https://gitlab.com/gitlab-org/gitlab/-/issues/6481), the new indexer is
|
|
the default and no configuration is required.
|
|
|
|
### Network architecture
|
|
|
|
The following list depicts the network architecture of Gitaly:
|
|
|
|
- GitLab Rails shards repositories into [repository storages](../repository_storage_paths.md).
|
|
- `/config/gitlab.yml` contains a map from storage names to `(Gitaly address, Gitaly token)` pairs.
|
|
- The `storage name` -\> `(Gitaly address, Gitaly token)` map in `/config/gitlab.yml` is the single
|
|
source of truth for the Gitaly network topology.
|
|
- A `(Gitaly address, Gitaly token)` corresponds to a Gitaly server.
|
|
- A Gitaly server hosts one or more storages.
|
|
- A Gitaly client can use one or more Gitaly servers.
|
|
- Gitaly addresses must be specified in such a way that they resolve correctly for **all** Gitaly
|
|
clients.
|
|
- Gitaly clients are:
|
|
- Puma or Unicorn.
|
|
- Sidekiq.
|
|
- GitLab Workhorse.
|
|
- GitLab Shell.
|
|
- Elasticsearch indexer.
|
|
- Gitaly itself.
|
|
- A Gitaly server must be able to make RPC calls **to itself** by using its own
|
|
`(Gitaly address, Gitaly token)` pair as specified in `/config/gitlab.yml`.
|
|
- Authentication is done through a static token which is shared among the Gitaly and GitLab Rails
|
|
nodes.
|
|
|
|
The following digraph illustrates communication between Gitaly servers and GitLab Rails showing
|
|
the default ports for HTTP and HTTPs communication.
|
|
|
|
![Gitaly network architecture diagram](img/gitaly_network_13_9.png)
|
|
|
|
WARNING:
|
|
Gitaly servers must not be exposed to the public internet as Gitaly's network traffic is unencrypted
|
|
by default. The use of firewall is highly recommended to restrict access to the Gitaly server.
|
|
Another option is to [use TLS](#enable-tls-support).
|
|
|
|
In the following sections, we describe how to configure two Gitaly servers with secret token
|
|
`abc123secret`:
|
|
|
|
- `gitaly1.internal`.
|
|
- `gitaly2.internal`.
|
|
|
|
We assume your GitLab installation has three repository storages:
|
|
|
|
- `default`.
|
|
- `storage1`.
|
|
- `storage2`.
|
|
|
|
You can use as few as one server with one repository storage if desired.
|
|
|
|
NOTE:
|
|
The token referred to throughout the Gitaly documentation is just an arbitrary password selected by
|
|
the administrator. It is unrelated to tokens created for the GitLab API or other similar web API
|
|
tokens.
|
|
|
|
### Install Gitaly
|
|
|
|
Install Gitaly on each Gitaly server using either Omnibus GitLab or install it from source:
|
|
|
|
- For Omnibus GitLab, [download and install](https://about.gitlab.com/install/) the Omnibus GitLab
|
|
package you want but **do not** provide the `EXTERNAL_URL=` value.
|
|
- To install from source, follow the steps at
|
|
[Install Gitaly](../../install/installation.md#install-gitaly).
|
|
|
|
### Configure authentication
|
|
|
|
Gitaly and GitLab use two shared secrets for authentication:
|
|
|
|
- One to authenticate gRPC requests to Gitaly.
|
|
- A second for authentication callbacks from GitLab Shell to the GitLab internal API.
|
|
|
|
**For Omnibus GitLab**
|
|
|
|
To configure the Gitaly token:
|
|
|
|
1. On the Gitaly clients, edit `/etc/gitlab/gitlab.rb`:
|
|
|
|
```ruby
|
|
gitlab_rails['gitaly_token'] = 'abc123secret'
|
|
```
|
|
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
1. On the Gitaly server, edit `/etc/gitlab/gitlab.rb`:
|
|
|
|
```ruby
|
|
gitaly['auth_token'] = 'abc123secret'
|
|
```
|
|
|
|
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
|
|
There are two ways to configure the GitLab Shell token.
|
|
|
|
Method 1:
|
|
|
|
1. Copy `/etc/gitlab/gitlab-secrets.json` from the Gitaly client to same path on the Gitaly servers
|
|
(and any other Gitaly clients).
|
|
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure) on Gitaly servers.
|
|
|
|
Method 2:
|
|
|
|
1. On the Gitaly clients, edit `/etc/gitlab/gitlab.rb`:
|
|
|
|
```ruby
|
|
gitlab_shell['secret_token'] = 'shellsecret'
|
|
```
|
|
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
1. On the Gitaly servers, edit `/etc/gitlab/gitlab.rb`:
|
|
|
|
```ruby
|
|
gitlab_shell['secret_token'] = 'shellsecret'
|
|
```
|
|
|
|
1. [Reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
|
|
**For installations from source**
|
|
|
|
1. Copy `/home/git/gitlab/.gitlab_shell_secret` from the Gitaly client to the same path on the
|
|
Gitaly servers (and any other Gitaly clients).
|
|
1. On the Gitaly clients, edit `/home/git/gitlab/config/gitlab.yml`:
|
|
|
|
```yaml
|
|
gitlab:
|
|
gitaly:
|
|
token: 'abc123secret'
|
|
```
|
|
|
|
1. Save the file and [restart GitLab](../restart_gitlab.md#installations-from-source).
|
|
1. On the Gitaly servers, edit `/home/git/gitaly/config.toml`:
|
|
|
|
```toml
|
|
[auth]
|
|
token = 'abc123secret'
|
|
```
|
|
|
|
1. Save the file and [restart GitLab](../restart_gitlab.md#installations-from-source).
|
|
|
|
### Configure Gitaly servers
|
|
|
|
On the Gitaly servers, you must configure storage paths and enable the network listener.
|
|
The Gitaly server must be able to read, write, and set permissions on the configured path.
|
|
|
|
If you want to reduce the risk of downtime when you enable authentication, you can temporarily
|
|
disable enforcement. For more information, see the documentation on configuring
|
|
[Gitaly authentication](https://gitlab.com/gitlab-org/gitaly/blob/master/doc/configuration/README.md#authentication).
|
|
|
|
**For Omnibus GitLab**
|
|
|
|
1. Edit `/etc/gitlab/gitlab.rb`:
|
|
|
|
<!--
|
|
updates to following example must also be made at
|
|
https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab
|
|
-->
|
|
|
|
```ruby
|
|
# Avoid running unnecessary services on the Gitaly server
|
|
postgresql['enable'] = false
|
|
redis['enable'] = false
|
|
nginx['enable'] = false
|
|
puma['enable'] = false
|
|
sidekiq['enable'] = false
|
|
gitlab_workhorse['enable'] = false
|
|
grafana['enable'] = false
|
|
gitlab_exporter['enable'] = false
|
|
|
|
# If you run a separate monitoring node you can disable these services
|
|
alertmanager['enable'] = false
|
|
prometheus['enable'] = false
|
|
|
|
# If you don't run a separate monitoring node you can
|
|
# enable Prometheus access & disable these extra services.
|
|
# This makes Prometheus listen on all interfaces. You must use firewalls to restrict access to this address/port.
|
|
# prometheus['listen_address'] = '0.0.0.0:9090'
|
|
# prometheus['monitor_kubernetes'] = false
|
|
|
|
# If you don't want to run monitoring services uncomment the following (not recommended)
|
|
# node_exporter['enable'] = false
|
|
|
|
# Prevent database connections during 'gitlab-ctl reconfigure'
|
|
gitlab_rails['rake_cache_clear'] = false
|
|
gitlab_rails['auto_migrate'] = false
|
|
|
|
# Configure the gitlab-shell API callback URL. Without this, `git push` will
|
|
# fail. This can be your 'front door' GitLab URL or an internal load
|
|
# balancer.
|
|
# Don't forget to copy `/etc/gitlab/gitlab-secrets.json` from Gitaly client to Gitaly server.
|
|
gitlab_rails['internal_api_url'] = 'https://gitlab.example.com'
|
|
|
|
# Authentication token to ensure only authorized servers can communicate with
|
|
# Gitaly server
|
|
gitaly['auth_token'] = 'AUTH_TOKEN'
|
|
|
|
# Make Gitaly accept connections on all network interfaces. You must use
|
|
# firewalls to restrict access to this address/port.
|
|
# Comment out following line if you only want to support TLS connections
|
|
gitaly['listen_addr'] = "0.0.0.0:8075"
|
|
```
|
|
|
|
1. Append the following to `/etc/gitlab/gitlab.rb` for each respective Gitaly server:
|
|
|
|
<!--
|
|
updates to following example must also be made at
|
|
https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab
|
|
-->
|
|
|
|
On `gitaly1.internal`:
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
'default' => {
|
|
'path' => '/var/opt/gitlab/git-data'
|
|
},
|
|
'storage1' => {
|
|
'path' => '/mnt/gitlab/git-data'
|
|
},
|
|
})
|
|
```
|
|
|
|
On `gitaly2.internal`:
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
'storage2' => {
|
|
'path' => '/srv/gitlab/git-data'
|
|
},
|
|
})
|
|
```
|
|
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
1. Run `sudo /opt/gitlab/embedded/bin/gitaly-hooks check /var/opt/gitlab/gitaly/config.toml`
|
|
to confirm that Gitaly can perform callbacks to the GitLab internal API.
|
|
|
|
**For installations from source**
|
|
|
|
1. Edit `/home/git/gitaly/config.toml`:
|
|
|
|
```toml
|
|
listen_addr = '0.0.0.0:8075'
|
|
|
|
internal_socket_dir = '/var/opt/gitlab/gitaly'
|
|
|
|
[logging]
|
|
format = 'json'
|
|
level = 'info'
|
|
dir = '/var/log/gitaly'
|
|
```
|
|
|
|
1. Append the following to `/home/git/gitaly/config.toml` for each respective Gitaly server:
|
|
|
|
On `gitaly1.internal`:
|
|
|
|
```toml
|
|
[[storage]]
|
|
name = 'default'
|
|
path = '/var/opt/gitlab/git-data/repositories'
|
|
|
|
[[storage]]
|
|
name = 'storage1'
|
|
path = '/mnt/gitlab/git-data/repositories'
|
|
```
|
|
|
|
On `gitaly2.internal`:
|
|
|
|
```toml
|
|
[[storage]]
|
|
name = 'storage2'
|
|
path = '/srv/gitlab/git-data/repositories'
|
|
```
|
|
|
|
1. Edit `/home/git/gitlab-shell/config.yml`:
|
|
|
|
```yaml
|
|
gitlab_url: https://gitlab.example.com
|
|
```
|
|
|
|
1. Save the files and [restart GitLab](../restart_gitlab.md#installations-from-source).
|
|
1. Run `sudo -u git /home/git/gitaly/gitaly-hooks check /home/git/gitaly/config.toml`
|
|
to confirm that Gitaly can perform callbacks to the GitLab internal API.
|
|
|
|
### Configure Gitaly clients
|
|
|
|
As the final step, you must update Gitaly clients to switch from using local Gitaly service to use
|
|
the Gitaly servers you just configured.
|
|
|
|
This can be risky because anything that prevents your Gitaly clients from reaching the Gitaly
|
|
servers causes all Gitaly requests to fail. For example, any sort of network, firewall, or name
|
|
resolution problems.
|
|
|
|
Additionally, you must [disable Rugged](../nfs.md#improving-nfs-performance-with-gitlab)
|
|
if previously enabled manually.
|
|
|
|
Gitaly makes the following assumptions:
|
|
|
|
- Your `gitaly1.internal` Gitaly server can be reached at `gitaly1.internal:8075` from your Gitaly
|
|
clients, and that Gitaly server can read, write, and set permissions on `/var/opt/gitlab/git-data` and
|
|
`/mnt/gitlab/git-data`.
|
|
- Your `gitaly2.internal` Gitaly server can be reached at `gitaly2.internal:8075` from your Gitaly
|
|
clients, and that Gitaly server can read, write, and set permissions on `/srv/gitlab/git-data`.
|
|
- Your `gitaly1.internal` and `gitaly2.internal` Gitaly servers can reach each other.
|
|
|
|
You can't define Gitaly servers with some as a local Gitaly server
|
|
(without `gitaly_address`) and some as remote
|
|
server (with `gitaly_address`) unless you use
|
|
[mixed configuration](#mixed-configuration).
|
|
|
|
**For Omnibus GitLab**
|
|
|
|
1. Edit `/etc/gitlab/gitlab.rb`:
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
'default' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' },
|
|
'storage1' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' },
|
|
'storage2' => { 'gitaly_address' => 'tcp://gitaly2.internal:8075' },
|
|
})
|
|
```
|
|
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
1. Run `sudo gitlab-rake gitlab:gitaly:check` on the Gitaly client (for example, the
|
|
Rails application) to confirm it can connect to Gitaly servers.
|
|
1. Tail the logs to see the requests:
|
|
|
|
```shell
|
|
sudo gitlab-ctl tail gitaly
|
|
```
|
|
|
|
**For installations from source**
|
|
|
|
1. Edit `/home/git/gitlab/config/gitlab.yml`:
|
|
|
|
```yaml
|
|
gitlab:
|
|
repositories:
|
|
storages:
|
|
default:
|
|
gitaly_address: tcp://gitaly1.internal:8075
|
|
path: /some/local/path
|
|
storage1:
|
|
gitaly_address: tcp://gitaly1.internal:8075
|
|
path: /some/local/path
|
|
storage2:
|
|
gitaly_address: tcp://gitaly2.internal:8075
|
|
path: /some/local/path
|
|
```
|
|
|
|
NOTE:
|
|
`/some/local/path` should be set to a local folder that exists, however no data is stored in
|
|
this folder. This requirement is scheduled to be removed when
|
|
[this issue](https://gitlab.com/gitlab-org/gitaly/-/issues/1282) is resolved.
|
|
|
|
1. Save the file and [restart GitLab](../restart_gitlab.md#installations-from-source).
|
|
1. Run `sudo -u git -H bundle exec rake gitlab:gitaly:check RAILS_ENV=production` to confirm the
|
|
Gitaly client can connect to Gitaly servers.
|
|
1. Tail the logs to see the requests:
|
|
|
|
```shell
|
|
tail -f /home/git/gitlab/log/gitaly.log
|
|
```
|
|
|
|
When you tail the Gitaly logs on your Gitaly server, you should see requests coming in. One sure way
|
|
to trigger a Gitaly request is to clone a repository from GitLab over HTTP or HTTPS.
|
|
|
|
WARNING:
|
|
If you have [server hooks](../server_hooks.md) configured, either per repository or globally, you
|
|
must move these to the Gitaly servers. If you have multiple Gitaly servers, copy your server hooks
|
|
to all Gitaly servers.
|
|
|
|
#### Mixed configuration
|
|
|
|
GitLab can reside on the same server as one of many Gitaly servers, but doesn't support
|
|
configuration that mixes local and remote configuration. The following setup is incorrect, because:
|
|
|
|
- All addresses must be reachable from the other Gitaly servers.
|
|
- `storage1` is assigned a Unix socket for `gitaly_address` which is
|
|
invalid for some of the Gitaly servers.
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
'default' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' },
|
|
'storage1' => { 'path' => '/mnt/gitlab/git-data' },
|
|
'storage2' => { 'gitaly_address' => 'tcp://gitaly2.internal:8075' },
|
|
})
|
|
```
|
|
|
|
To combine local and remote Gitaly servers, use an external address for the local Gitaly server. For
|
|
example:
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
'default' => { 'gitaly_address' => 'tcp://gitaly1.internal:8075' },
|
|
# Address of the GitLab server that has Gitaly running on it
|
|
'storage1' => { 'gitaly_address' => 'tcp://gitlab.internal:8075', 'path' => '/mnt/gitlab/git-data' },
|
|
'storage2' => { 'gitaly_address' => 'tcp://gitaly2.internal:8075' },
|
|
})
|
|
|
|
# Make Gitaly accept connections on all network interfaces
|
|
gitaly['listen_addr'] = "0.0.0.0:8075"
|
|
|
|
# Or for TLS
|
|
gitaly['tls_listen_addr'] = "0.0.0.0:9999"
|
|
gitaly['certificate_path'] = "/etc/gitlab/ssl/cert.pem"
|
|
gitaly['key_path'] = "/etc/gitlab/ssl/key.pem"
|
|
```
|
|
|
|
`path` can be included only for storage shards on the local Gitaly server.
|
|
If it's excluded, default Git storage directory is used for that storage shard.
|
|
|
|
### Disable Gitaly where not required (optional)
|
|
|
|
If you run Gitaly [as a remote service](#run-gitaly-on-its-own-server), consider
|
|
disabling the local Gitaly service that runs on your GitLab server by default, and run it
|
|
only where required.
|
|
|
|
Disabling Gitaly on the GitLab instance makes sense only when you run GitLab in a custom cluster configuration, where
|
|
Gitaly runs on a separate machine from the GitLab instance. Disabling Gitaly on all machines in the cluster is not
|
|
a valid configuration (some machines much act as Gitaly servers).
|
|
|
|
To disable Gitaly on a GitLab server:
|
|
|
|
**For Omnibus GitLab**
|
|
|
|
1. Edit `/etc/gitlab/gitlab.rb`:
|
|
|
|
```ruby
|
|
gitaly['enable'] = false
|
|
```
|
|
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
|
|
**For installations from source**
|
|
|
|
1. Edit `/etc/default/gitlab`:
|
|
|
|
```shell
|
|
gitaly_enabled=false
|
|
```
|
|
|
|
1. Save the file and [restart GitLab](../restart_gitlab.md#installations-from-source).
|
|
|
|
## Enable TLS support
|
|
|
|
> - [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/22602) in GitLab 11.8.
|
|
> - [Introduced](https://gitlab.com/gitlab-org/gitaly/-/issues/3160) in GitLab 13.6, outgoing TLS connections to GitLab provide client certificates if configured.
|
|
|
|
Gitaly supports TLS encryption. To communicate with a Gitaly instance that listens for secure
|
|
connections, use the `tls://` URL scheme in the `gitaly_address` of the corresponding
|
|
storage entry in the GitLab configuration.
|
|
|
|
Gitaly provides the same server certificates as client certificates in TLS
|
|
connections to GitLab. This can be used as part of a mutual TLS authentication strategy
|
|
when combined with reverse proxies (for example, NGINX) that validate client certificate
|
|
to grant access to GitLab.
|
|
|
|
You must supply your own certificates as this isn't provided automatically. The certificate
|
|
corresponding to each Gitaly server must be installed on that Gitaly server.
|
|
|
|
Additionally, the certificate (or its certificate authority) must be installed on all:
|
|
|
|
- Gitaly servers.
|
|
- Gitaly clients that communicate with it.
|
|
|
|
Note the following:
|
|
|
|
- The certificate must specify the address you use to access the Gitaly server. You must add the hostname or IP address as a Subject Alternative Name to the certificate.
|
|
- You can configure Gitaly servers with both an unencrypted listening address `listen_addr` and an
|
|
encrypted listening address `tls_listen_addr` at the same time. This allows you to gradually
|
|
transition from unencrypted to encrypted traffic if necessary.
|
|
|
|
To configure Gitaly with TLS:
|
|
|
|
**For Omnibus GitLab**
|
|
|
|
1. Create certificates for Gitaly servers.
|
|
1. On the Gitaly clients, copy the certificates (or their certificate authority) into
|
|
`/etc/gitlab/trusted-certs`:
|
|
|
|
```shell
|
|
sudo cp cert.pem /etc/gitlab/trusted-certs/
|
|
```
|
|
|
|
1. On the Gitaly clients, edit `git_data_dirs` in `/etc/gitlab/gitlab.rb` as follows:
|
|
|
|
```ruby
|
|
git_data_dirs({
|
|
'default' => { 'gitaly_address' => 'tls://gitaly1.internal:9999' },
|
|
'storage1' => { 'gitaly_address' => 'tls://gitaly1.internal:9999' },
|
|
'storage2' => { 'gitaly_address' => 'tls://gitaly2.internal:9999' },
|
|
})
|
|
```
|
|
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
1. On the Gitaly servers, create the `/etc/gitlab/ssl` directory and copy your key and certificate
|
|
there:
|
|
|
|
```shell
|
|
sudo mkdir -p /etc/gitlab/ssl
|
|
sudo chmod 755 /etc/gitlab/ssl
|
|
sudo cp key.pem cert.pem /etc/gitlab/ssl/
|
|
sudo chmod 644 key.pem cert.pem
|
|
```
|
|
|
|
1. Copy all Gitaly server certificates (or their certificate authority) to
|
|
`/etc/gitlab/trusted-certs` on all Gitaly servers and clients
|
|
so that Gitaly servers and clients trust the certificate when calling into themselves
|
|
or other Gitaly servers:
|
|
|
|
```shell
|
|
sudo cp cert1.pem cert2.pem /etc/gitlab/trusted-certs/
|
|
```
|
|
|
|
1. Edit `/etc/gitlab/gitlab.rb` and add:
|
|
|
|
<!--
|
|
updates to following example must also be made at
|
|
https://gitlab.com/gitlab-org/charts/gitlab/blob/master/doc/advanced/external-gitaly/external-omnibus-gitaly.md#configure-omnibus-gitlab
|
|
-->
|
|
|
|
```ruby
|
|
gitaly['tls_listen_addr'] = "0.0.0.0:9999"
|
|
gitaly['certificate_path'] = "/etc/gitlab/ssl/cert.pem"
|
|
gitaly['key_path'] = "/etc/gitlab/ssl/key.pem"
|
|
```
|
|
|
|
1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
1. Verify Gitaly traffic is being served over TLS by
|
|
[observing the types of Gitaly connections](#observe-type-of-gitaly-connections).
|
|
1. (Optional) Improve security by:
|
|
1. Disabling non-TLS connections by commenting out or deleting `gitaly['listen_addr']` in
|
|
`/etc/gitlab/gitlab.rb`.
|
|
1. Saving the file.
|
|
1. [Reconfiguring GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
|
|
**For installations from source**
|
|
|
|
1. Create certificates for Gitaly servers.
|
|
1. On the Gitaly clients, copy the certificates into the system trusted certificates:
|
|
|
|
```shell
|
|
sudo cp cert.pem /usr/local/share/ca-certificates/gitaly.crt
|
|
sudo update-ca-certificates
|
|
```
|
|
|
|
1. On the Gitaly clients, edit `storages` in `/home/git/gitlab/config/gitlab.yml` as follows:
|
|
|
|
```yaml
|
|
gitlab:
|
|
repositories:
|
|
storages:
|
|
default:
|
|
gitaly_address: tls://gitaly1.internal:9999
|
|
path: /some/local/path
|
|
storage1:
|
|
gitaly_address: tls://gitaly1.internal:9999
|
|
path: /some/local/path
|
|
storage2:
|
|
gitaly_address: tls://gitaly2.internal:9999
|
|
path: /some/local/path
|
|
```
|
|
|
|
NOTE:
|
|
`/some/local/path` should be set to a local folder that exists, however no data is stored
|
|
in this folder. This requirement is scheduled to be removed when
|
|
[Gitaly issue #1282](https://gitlab.com/gitlab-org/gitaly/-/issues/1282) is resolved.
|
|
|
|
1. Save the file and [restart GitLab](../restart_gitlab.md#installations-from-source).
|
|
1. On the Gitaly servers, create or edit `/etc/default/gitlab` and add:
|
|
|
|
```shell
|
|
export SSL_CERT_DIR=/etc/gitlab/ssl
|
|
```
|
|
|
|
1. On the Gitaly servers, create the `/etc/gitlab/ssl` directory and copy your key and certificate there:
|
|
|
|
```shell
|
|
sudo mkdir -p /etc/gitlab/ssl
|
|
sudo chmod 755 /etc/gitlab/ssl
|
|
sudo cp key.pem cert.pem /etc/gitlab/ssl/
|
|
sudo chmod 644 key.pem cert.pem
|
|
```
|
|
|
|
1. Copy all Gitaly server certificates (or their certificate authority) to the system trusted
|
|
certificates folder so Gitaly server trusts the certificate when calling into itself or other Gitaly
|
|
servers.
|
|
|
|
```shell
|
|
sudo cp cert.pem /usr/local/share/ca-certificates/gitaly.crt
|
|
sudo update-ca-certificates
|
|
```
|
|
|
|
1. Edit `/home/git/gitaly/config.toml` and add:
|
|
|
|
```toml
|
|
tls_listen_addr = '0.0.0.0:9999'
|
|
|
|
[tls]
|
|
certificate_path = '/etc/gitlab/ssl/cert.pem'
|
|
key_path = '/etc/gitlab/ssl/key.pem'
|
|
```
|
|
|
|
1. Save the file and [restart GitLab](../restart_gitlab.md#installations-from-source).
|
|
1. Verify Gitaly traffic is being served over TLS by
|
|
[observing the types of Gitaly connections](#observe-type-of-gitaly-connections).
|
|
1. (Optional) Improve security by:
|
|
1. Disabling non-TLS connections by commenting out or deleting `listen_addr` in
|
|
`/home/git/gitaly/config.toml`.
|
|
1. Saving the file.
|
|
1. [Restarting GitLab](../restart_gitlab.md#installations-from-source).
|
|
|
|
### Observe type of Gitaly connections
|
|
|
|
[Prometheus](../monitoring/prometheus/index.md) can be used observe what type of connections Gitaly
|
|
is serving a production environment. Use the following Prometheus query:
|
|
|
|
```prometheus
|
|
sum(rate(gitaly_connections_total[5m])) by (type)
|
|
```
|
|
|
|
## `gitaly-ruby`
|
|
|
|
Gitaly was developed to replace the Ruby application code in GitLab.
|
|
|
|
To save time and avoid the risk of rewriting existing application logic, we chose to copy some
|
|
application code from GitLab into Gitaly.
|
|
|
|
To be able to run that code, `gitaly-ruby` was created, which is a "sidecar" process for the main
|
|
Gitaly Go process. Some examples of things that are implemented in `gitaly-ruby` are:
|
|
|
|
- RPCs that deal with wikis.
|
|
- RPCs that create commits on behalf of a user, such as merge commits.
|
|
|
|
We recommend:
|
|
|
|
- At least 300 MB memory per worker.
|
|
- No more than one worker per core.
|
|
|
|
NOTE:
|
|
`gitaly-ruby` is planned to be eventually removed. To track progress, see the
|
|
[Remove the Gitaly-Ruby sidecar](https://gitlab.com/groups/gitlab-org/-/epics/2862) epic.
|
|
|
|
### Configure number of `gitaly-ruby` workers
|
|
|
|
`gitaly-ruby` has much less capacity than Gitaly implemented in Go. If your Gitaly server has to handle lots of
|
|
requests, the default setting of having just one active `gitaly-ruby` sidecar might not be enough.
|
|
|
|
If you see `ResourceExhausted` errors from Gitaly, it's very likely that you have not enough
|
|
`gitaly-ruby` capacity.
|
|
|
|
You can increase the number of `gitaly-ruby` processes on your Gitaly server with the following
|
|
settings:
|
|
|
|
**For Omnibus GitLab**
|
|
|
|
1. Edit `/etc/gitlab/gitlab.rb`:
|
|
|
|
```ruby
|
|
# Default is 2 workers. The minimum is 2; 1 worker is always reserved as
|
|
# a passive stand-by.
|
|
gitaly['ruby_num_workers'] = 4
|
|
```
|
|
|
|
1. Save the file, and then [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
|
|
|
|
**For installations from source**
|
|
|
|
1. Edit `/home/git/gitaly/config.toml`:
|
|
|
|
```toml
|
|
[gitaly-ruby]
|
|
num_workers = 4
|
|
```
|
|
|
|
1. Save the file and [restart GitLab](../restart_gitlab.md#installations-from-source).
|
|
|
|
## Limit RPC concurrency
|
|
|
|
Clone traffic can put a large strain on your Gitaly service. The bulk of the work gets done in the
|
|
either of the following RPCs:
|
|
|
|
- `SSHUploadPack` (for Git SSH).
|
|
- `PostUploadPack` (for Git HTTP).
|
|
|
|
To prevent such workloads from overwhelming your Gitaly server, you can set concurrency limits in
|
|
Gitaly's configuration file. For example:
|
|
|
|
```ruby
|
|
# in /etc/gitlab/gitlab.rb
|
|
|
|
gitaly['concurrency'] = [
|
|
{
|
|
'rpc' => "/gitaly.SmartHTTPService/PostUploadPack",
|
|
'max_per_repo' => 20
|
|
},
|
|
{
|
|
'rpc' => "/gitaly.SSHService/SSHUploadPack",
|
|
'max_per_repo' => 20
|
|
}
|
|
]
|
|
```
|
|
|
|
This limits the number of in-flight RPC calls for the given RPCs. The limit is applied per
|
|
repository. In the example above:
|
|
|
|
- Each repository served by the Gitaly server can have at most 20 simultaneous `PostUploadPack` RPC
|
|
calls in flight, and the same for `SSHUploadPack`.
|
|
- If another request comes in for a repository that has used up its 20 slots, that request gets
|
|
queued.
|
|
|
|
You can observe the behavior of this queue using the Gitaly logs and Prometheus:
|
|
|
|
- In the Gitaly logs, look for the string (or structured log field) `acquire_ms`. Messages that have
|
|
this field are reporting about the concurrency limiter.
|
|
- In Prometheus, look for the following metrics:
|
|
|
|
- `gitaly_rate_limiting_in_progress`.
|
|
- `gitaly_rate_limiting_queued`.
|
|
- `gitaly_rate_limiting_seconds`.
|
|
|
|
NOTE:
|
|
Although the name of the Prometheus metric contains `rate_limiting`, it's a concurrency limiter, not
|
|
a rate limiter. If a Gitaly client makes 1,000 requests in a row very quickly, concurrency doesn't
|
|
exceed 1, and the concurrency limiter has no effect.
|
|
|
|
## Background Repository Optimization
|
|
|
|
Empty directories and unneeded configuration settings may accumulate in a repository and
|
|
slow down Git operations. Gitaly can schedule a daily background task with a maximum duration
|
|
to clean up these items and improve performance.
|
|
|
|
WARNING:
|
|
This is an experimental feature and may place significant load on the host while running.
|
|
Make sure to schedule this during off-peak hours and keep the duration short (for example, 30-60 minutes).
|
|
|
|
**For Omnibus GitLab**
|
|
|
|
Edit `/etc/gitlab/gitlab.rb` and add:
|
|
|
|
```ruby
|
|
gitaly['daily_maintenance_start_hour'] = 4
|
|
gitaly['daily_maintenance_start_minute'] = 30
|
|
gitaly['daily_maintenance_duration'] = '30m'
|
|
gitaly['daily_maintenance_storages'] = ["default"]
|
|
```
|
|
|
|
**For installations from source**
|
|
|
|
Edit `/home/git/gitaly/config.toml` and add:
|
|
|
|
```toml
|
|
[daily_maintenance]
|
|
start_hour = 4
|
|
start_minute = 30
|
|
duration = '30m'
|
|
storages = ["default"]
|
|
```
|
|
|
|
## Rotate Gitaly authentication token
|
|
|
|
Rotating credentials in a production environment often requires downtime, causes outages, or both.
|
|
|
|
However, you can rotate Gitaly credentials without a service interruption. Rotating a Gitaly
|
|
authentication token involves:
|
|
|
|
- [Verifying authentication monitoring](#verify-authentication-monitoring).
|
|
- [Enabling "auth transitioning" mode](#enable-auth-transitioning-mode).
|
|
- [Updating Gitaly authentication tokens](#update-gitaly-authentication-token).
|
|
- [Ensuring there are no authentication failures](#ensure-there-are-no-authentication-failures).
|
|
- [Disabling "auth transitioning" mode](#disable-auth-transitioning-mode).
|
|
- [Verifying authentication is enforced](#verify-authentication-is-enforced).
|
|
|
|
This procedure also works if you are running GitLab on a single server. In that case, "Gitaly
|
|
server" and "Gitaly client" refers to the same machine.
|
|
|
|
### Verify authentication monitoring
|
|
|
|
Before rotating a Gitaly authentication token, verify that you can monitor the authentication
|
|
behavior of your GitLab installation using Prometheus. Use the following Prometheus query:
|
|
|
|
```prometheus
|
|
sum(rate(gitaly_authentications_total[5m])) by (enforced, status)
|
|
```
|
|
|
|
In a system where authentication is configured correctly and where you have live traffic, you
|
|
see something like this:
|
|
|
|
```prometheus
|
|
{enforced="true",status="ok"} 4424.985419441742
|
|
```
|
|
|
|
There may also be other numbers with rate 0. We care only about the non-zero numbers.
|
|
|
|
The only non-zero number should have `enforced="true",status="ok"`. If you have other non-zero
|
|
numbers, something is wrong in your configuration.
|
|
|
|
The `status="ok"` number reflects your current request rate. In the example above, Gitaly is
|
|
handling about 4000 requests per second.
|
|
|
|
Now that you have established that you can monitor the Gitaly authentication behavior of your GitLab
|
|
installation, you can begin the rest of the procedure.
|
|
|
|
### Enable "auth transitioning" mode
|
|
|
|
Temporarily disable Gitaly authentication on the Gitaly servers by putting them into "auth
|
|
transitioning" mode as follows:
|
|
|
|
```ruby
|
|
# in /etc/gitlab/gitlab.rb
|
|
gitaly['auth_transitioning'] = true
|
|
```
|
|
|
|
After you have made this change, your [Prometheus query](#verify-authentication-monitoring)
|
|
should return something like:
|
|
|
|
```prometheus
|
|
{enforced="false",status="would be ok"} 4424.985419441742
|
|
```
|
|
|
|
Because `enforced="false"`, it is safe to start rolling out the new token.
|
|
|
|
### Update Gitaly authentication token
|
|
|
|
To update to a new Gitaly authentication token, on each Gitaly client **and** Gitaly server:
|
|
|
|
1. Update the configuration:
|
|
|
|
```ruby
|
|
# in /etc/gitlab/gitlab.rb
|
|
|
|
gitaly['auth_token'] = '<new secret token>'
|
|
```
|
|
|
|
1. Restart Gitaly:
|
|
|
|
```shell
|
|
gitlab-ctl restart gitaly
|
|
```
|
|
|
|
If you run your [Prometheus query](#verify-authentication-monitoring) while this change is
|
|
being rolled out, you see non-zero values for the `enforced="false",status="denied"` counter.
|
|
|
|
### Ensure there are no authentication failures
|
|
|
|
After the new token is set, and all services involved have been restarted, you will
|
|
[temporarily see](#verify-authentication-monitoring) a mix of:
|
|
|
|
- `status="would be ok"`.
|
|
- `status="denied"`.
|
|
|
|
After the new token is picked up by all Gitaly clients and Gitaly servers, the
|
|
**only non-zero rate** should be `enforced="false",status="would be ok"`.
|
|
|
|
### Disable "auth transitioning" mode
|
|
|
|
To re-enable Gitaly authentication, disable "auth transitioning" mode. Update the configuration on
|
|
your Gitaly servers as follows:
|
|
|
|
```ruby
|
|
# in /etc/gitlab/gitlab.rb
|
|
gitaly['auth_transitioning'] = false
|
|
```
|
|
|
|
WARNING:
|
|
Without completing this step, you have **no Gitaly authentication**.
|
|
|
|
### Verify authentication is enforced
|
|
|
|
Refresh your [Prometheus query](#verify-authentication-monitoring). You should now see a similar
|
|
result as you did at the start. For example:
|
|
|
|
```prometheus
|
|
{enforced="true",status="ok"} 4424.985419441742
|
|
```
|
|
|
|
Note that `enforced="true"` means that authentication is being enforced.
|