With the command above, you create a Runner that uses the [ruby:2.6](https://hub.docker.com/_/ruby) image and uses a [PostgreSQL](https://hub.docker.com/_/postgres) database.
With the command above, you create a Runner that uses the [`ruby:2.6`](https://hub.docker.com/_/ruby) image and uses a [PostgreSQL](https://hub.docker.com/_/postgres) database.
To access the PostgreSQL database, connect to `host: postgres` as user `postgres` with no password.
@@ -775,7 +775,7 @@ When referring to `~git` in the pictures it means the home directory of the Git
GitLab is primarily installed within the `/home/git` user home directory as `git` user. Within the home directory is where the gitlabhq server software resides as well as the repositories (though the repository location is configurable).
The bare repositories are located in `/home/git/repositories`. GitLab is a ruby on rails application so the particulars of the inner workings can be learned by studying how a ruby on rails application works.
The bare repositories are located in `/home/git/repositories`. GitLab is a Ruby on rails application so the particulars of the inner workings can be learned by studying how a Ruby on rails application works.
To serve repositories over SSH there's an add-on application called GitLab Shell which is installed in `/home/git/gitlab-shell`.
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@@ -794,7 +794,7 @@ GitLab has several components to operate. It requires a persistent database
Unicorn. All these components should run as different system users to GitLab
(e.g., `postgres`, `redis` and `www-data`, instead of `git`).
As the `git` user it starts Sidekiq and Unicorn (a simple ruby HTTP server
As the `git` user it starts Sidekiq and Unicorn (a simple Ruby HTTP server
running on port `8080` by default). Under the GitLab user there are normally 4
@@ -270,4 +270,4 @@ To generate GraphQL schema files based on the GitLab schema, run:
bundle exec rake gitlab:graphql:schema:dump
```
This uses graphql-ruby's built-in Rake tasks to generate files in both [IDL](https://www.prisma.io/blog/graphql-sdl-schema-definition-language-6755bcb9ce51) and JSON formats.
This uses GraphQL Ruby's built-in Rake tasks to generate files in both [IDL](https://www.prisma.io/blog/graphql-sdl-schema-definition-language-6755bcb9ce51) and JSON formats.
[GitLab Workhorse](https://gitlab.com/gitlab-org/gitlab-workhorse) has special rules for handling uploads.
To prevent occupying a ruby process on I/O operations, we process the upload in workhorse, where is cheaper.
To prevent occupying a Ruby process on I/O operations, we process the upload in workhorse, where is cheaper.
This process can also directly upload to object storage.
## The problem description
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@@ -40,7 +40,7 @@ We have three challenges here: performance, availability, and scalability.
### Performance
Rails process are expensive in terms of both CPU and memory. Ruby [global interpreter lock](https://en.wikipedia.org/wiki/Global_interpreter_lock) adds to cost too because the ruby process will spend time on I/O operations on step 3 causing incoming requests to pile up.
Rails process are expensive in terms of both CPU and memory. Ruby [global interpreter lock](https://en.wikipedia.org/wiki/Global_interpreter_lock) adds to cost too because the Ruby process will spend time on I/O operations on step 3 causing incoming requests to pile up.
In order to improve this, [disk buffered upload](#disk-buffered-upload) was implemented. With this, Rails no longer deals with writing uploaded files to disk.
@@ -10,7 +10,7 @@ If GitLab is guessing wrong, you can override its choice of language using the `
When you check in and push that change, all `*.pl` files in your project will be highlighted as Prolog.
The paths here are simply Git's built-in [`.gitattributes` interface](https://git-scm.com/docs/gitattributes). So, if you were to invent a file format called a `Nicefile` at the root of your project that used ruby syntax, all you need is:
The paths here are simply Git's built-in [`.gitattributes` interface](https://git-scm.com/docs/gitattributes). So, if you were to invent a file format called a `Nicefile` at the root of your project that used Ruby syntax, all you need is:
