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Commit ec7713eb authored by Craig Norris's avatar Craig Norris
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Merge branch 'selhorn-move-services' into 'master' 

Moved services content to services section

See merge request gitlab-org/gitlab!57905
parents 2e9e1df7 00efbdad
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doc/api/templates/gitlab_ci_ymls.md
View file @ ec7713eb
......@@ -135,7 +135,7 @@ Example response:
```json
{
"name": "Ruby",
"content": "# This file is a template, and might need editing before it works on your project.\n# Official language image. Look for the different tagged releases at:\n# https://hub.docker.com/r/library/ruby/tags/\nimage: \"ruby:2.5\"\n\n# Pick zero or more services to be used on all builds.\n# Only needed when using a docker container to run your tests in.\n# Check out: http://docs.gitlab.com/ee/ci/docker/using_docker_images.html#what-is-a-service\nservices:\n - mysql:latest\n - redis:latest\n - postgres:latest\n\nvariables:\n POSTGRES_DB: database_name\n\n# Cache gems in between builds\ncache:\n paths:\n - vendor/ruby\n\n# This is a basic example for a gem or script which doesn't use\n# services such as redis or postgres\nbefore_script:\n - ruby -v # Print out ruby version for debugging\n # Uncomment next line if your rails app needs a JS runtime:\n # - apt-get update -q && apt-get install nodejs -yqq\n - bundle install -j $(nproc) --path vendor # Install dependencies into ./vendor/ruby\n\n# Optional - Delete if not using `rubocop`\nrubocop:\n script:\n - rubocop\n\nrspec:\n script:\n - rspec spec\n\nrails:\n variables:\n DATABASE_URL: \"postgresql://postgres:postgres@postgres:5432/$POSTGRES_DB\"\n script:\n - rails db:migrate\n - rails db:seed\n - rails test\n\n# This deploy job uses a simple deploy flow to Heroku, other providers, e.g. AWS Elastic Beanstalk\n# are supported too: https://github.com/travis-ci/dpl\ndeploy:\n type: deploy\n environment: production\n script:\n - gem install dpl\n - dpl --provider=heroku --app=$HEROKU_APP_NAME --api-key=$HEROKU_PRODUCTION_KEY\n"
"content": "# This file is a template, and might need editing before it works on your project.\n# Official language image. Look for the different tagged releases at:\n# https://hub.docker.com/r/library/ruby/tags/\nimage: \"ruby:2.5\"\n\n# Pick zero or more services to be used on all builds.\n# Only needed when using a docker container to run your tests in.\n# Check out: http://docs.gitlab.com/ee/ci/services/index.html\n - mysql:latest\n - redis:latest\n - postgres:latest\n\nvariables:\n POSTGRES_DB: database_name\n\n# Cache gems in between builds\ncache:\n paths:\n - vendor/ruby\n\n# This is a basic example for a gem or script which doesn't use\n# services such as redis or postgres\nbefore_script:\n - ruby -v # Print out ruby version for debugging\n # Uncomment next line if your rails app needs a JS runtime:\n # - apt-get update -q && apt-get install nodejs -yqq\n - bundle install -j $(nproc) --path vendor # Install dependencies into ./vendor/ruby\n\n# Optional - Delete if not using `rubocop`\nrubocop:\n script:\n - rubocop\n\nrspec:\n script:\n - rspec spec\n\nrails:\n variables:\n DATABASE_URL: \"postgresql://postgres:postgres@postgres:5432/$POSTGRES_DB\"\n script:\n - rails db:migrate\n - rails db:seed\n - rails test\n\n# This deploy job uses a simple deploy flow to Heroku, other providers, e.g. AWS Elastic Beanstalk\n# are supported too: https://github.com/travis-ci/dpl\ndeploy:\n type: deploy\n environment: production\n script:\n - gem install dpl\n - dpl --provider=heroku --app=$HEROKU_APP_NAME --api-key=$HEROKU_PRODUCTION_KEY\n"
}
```
......
doc/ci/docker/using_docker_images.md
View file @ ec7713eb
......@@ -18,7 +18,7 @@ To run CI/CD jobs in a Docker container, you need to:
- Specify an image in your `.gitlab-ci.yml` file. The runner creates a container from this image
and runs the jobs in it.
- Optional. Specify other images in your `.gitlab-ci.yml` file. These containers are known as
["services"](#what-is-a-service) and you can use them to run services like MySQL separately.
["services"](../services/index.md) and you can use them to run services like MySQL separately.
## Register a runner that uses the Docker executor
......@@ -67,137 +67,7 @@ to use local images.
For more information about images and Docker Hub, read
the [Docker Fundamentals](https://docs.docker.com/engine/understanding-docker/) documentation.
## What is a service
The `services` keyword defines another Docker image that's run during
your job. It's linked to the Docker image that the `image` keyword defines,
which allows you to access the service image during build time.
The service image can run any application, but the most common use case is to
run a database container, for example, `mysql`. It's easier and faster to use an
existing image and run it as an additional container than to install `mysql` every
time the project is built.
You're not limited to only database services. You can add as many
services you need to `.gitlab-ci.yml` or manually modify `config.toml`.
Any image found at [Docker Hub](https://hub.docker.com/) or your private Container Registry can be
used as a service.
Services inherit the same DNS servers, search domains, and additional hosts as
the CI container itself.
You can see some widely used services examples in the relevant documentation of
[CI services examples](../services/index.md).
### How services are linked to the job
To better understand how container linking works, read
[Linking containers together](https://docs.docker.com/engine/userguide/networking/default_network/dockerlinks/).
If you add `mysql` as service to your application, the image is
used to create a container that's linked to the job container.
The service container for MySQL is accessible under the hostname `mysql`.
To access your database service, connect to the host named `mysql` instead of a
socket or `localhost`. Read more in [accessing the services](#accessing-the-services).
### How the health check of services works
Services are designed to provide additional features which are **network accessible**.
They may be a database like MySQL, or Redis, and even `docker:stable-dind` which
allows you to use Docker-in-Docker. It can be practically anything that's
required for the CI/CD job to proceed, and is accessed by network.
To make sure this works, the runner:
1. Checks which ports are exposed from the container by default.
1. Starts a special container that waits for these ports to be accessible.
If the second stage of the check fails, it prints the warning: `*** WARNING: Service XYZ probably didn't start properly`.
This issue can occur because:
- There is no opened port in the service.
- The service was not started properly before the timeout, and the port is not
responding.
In most cases it affects the job, but there may be situations when the job
still succeeds even if that warning was printed. For example:
- The service was started shortly after the warning was raised, and the job is
not using the linked service from the beginning. In that case, when the
job needed to access the service, it may have been already there waiting for
connections.
- The service container is not providing any networking service, but it's doing
something with the job's directory (all services have the job directory mounted
as a volume under `/builds`). In that case, the service does its job, and
because the job is not trying to connect to it, it does not fail.
### What services are not for
As mentioned before, this feature is designed to provide **network accessible**
services. A database is the simplest example of such a service.
The services feature is not designed to, and does not, add any software from the
defined `services` image(s) to the job's container.
For example, if you have the following `services` defined in your job, the `php`,
`node` or `go` commands are **not** available for your script, and the job fails:
```yaml
job:
services:
- php:7
- node:latest
- golang:1.10
image: alpine:3.7
script:
- php -v
- node -v
- go version
```
If you need to have `php`, `node` and `go` available for your script, you should
either:
- Choose an existing Docker image that contains all required tools.
- Create your own Docker image, with all the required tools included,
and use that in your job.
### Accessing the services
Let's say that you need a Wordpress instance to test some API integration with
your application. You can then use for example the
[`tutum/wordpress`](https://hub.docker.com/r/tutum/wordpress/) image in your
`.gitlab-ci.yml` file:
```yaml
services:
- tutum/wordpress:latest
```
If you don't [specify a service alias](#available-settings-for-services),
when the job runs, `tutum/wordpress` is started. You have
access to it from your build container under two hostnames:
- `tutum-wordpress`
- `tutum__wordpress`
Hostnames with underscores are not RFC valid and may cause problems in third-party
applications.
The default aliases for the service's hostname are created from its image name
following these rules:
- Everything after the colon (`:`) is stripped.
- Slash (`/`) is replaced with double underscores (`__`) and the primary alias
is created.
- Slash (`/`) is replaced with a single dash (`-`) and the secondary alias is
created (requires GitLab Runner v1.1.0 or higher).
To override the default behavior, you can
[specify a service alias](#available-settings-for-services).
## Define `image` and `services` from `.gitlab-ci.yml`
## Define `image` in the `.gitlab-ci.yml` file
You can define an image that's used for all jobs, and a list of
services that you want to use during build time:
......@@ -223,87 +93,6 @@ The image name must be in one of the following formats:
- `image: <image-name>:<tag>`
- `image: <image-name>@<digest>`
It's also possible to define different images and services per job:
```yaml
default:
before_script:
- bundle install
test:2.6:
image: ruby:2.6
services:
- postgres:11.7
script:
- bundle exec rake spec
test:2.7:
image: ruby:2.7
services:
- postgres:12.2
script:
- bundle exec rake spec
```
Or you can pass some [extended configuration options](#extended-docker-configuration-options)
for `image` and `services`:
```yaml
default:
image:
name: ruby:2.6
entrypoint: ["/bin/bash"]
services:
- name: my-postgres:11.7
alias: db-postgres
entrypoint: ["/usr/local/bin/db-postgres"]
command: ["start"]
before_script:
- bundle install
test:
script:
- bundle exec rake spec
```
## Passing CI/CD variables to services
You can also pass custom CI/CD [variables](../variables/README.md)
to fine tune your Docker `images` and `services` directly in the `.gitlab-ci.yml` file.
For more information, read about [`.gitlab-ci.yml` defined variables](../variables/README.md#gitlab-ciyml-defined-variables).
```yaml
# The following variables are automatically passed down to the Postgres container
# as well as the Ruby container and available within each.
variables:
HTTPS_PROXY: "https://10.1.1.1:8090"
HTTP_PROXY: "https://10.1.1.1:8090"
POSTGRES_DB: "my_custom_db"
POSTGRES_USER: "postgres"
POSTGRES_PASSWORD: "example"
PGDATA: "/var/lib/postgresql/data"
POSTGRES_INITDB_ARGS: "--encoding=UTF8 --data-checksums"
services:
- name: postgres:11.7
alias: db
entrypoint: ["docker-entrypoint.sh"]
command: ["postgres"]
image:
name: ruby:2.6
entrypoint: ["/bin/bash"]
before_script:
- bundle install
test:
script:
- bundle exec rake spec
```
## Extended Docker configuration options
> Introduced in GitLab and GitLab Runner 9.4.
......@@ -350,98 +139,9 @@ For example, the following two definitions are equal:
| `name` | yes, when used with any other option | 9.4 |Full name of the image to use. It should contain the Registry part if needed. |
| `entrypoint` | no | 9.4 |Command or script to execute as the container's entrypoint. It's translated to Docker's `--entrypoint` option while creating the container. The syntax is similar to [`Dockerfile`'s `ENTRYPOINT`](https://docs.docker.com/engine/reference/builder/#entrypoint) directive, where each shell token is a separate string in the array. |
### Available settings for `services`
> Introduced in GitLab and GitLab Runner 9.4.
| Setting | Required | GitLab version | Description |
|------------|----------|----------------| ----------- |
| `name` | yes, when used with any other option | 9.4 | Full name of the image to use. It should contain the Registry part if needed. |
| `entrypoint` | no | 9.4 |Command or script to execute as the container's entrypoint. It's translated to Docker's `--entrypoint` option while creating the container. The syntax is similar to [`Dockerfile`'s `ENTRYPOINT`](https://docs.docker.com/engine/reference/builder/#entrypoint) directive, where each shell token is a separate string in the array. |
| `command` | no | 9.4 |Command or script that should be used as the container's command. It's translated to arguments passed to Docker after the image's name. The syntax is similar to [`Dockerfile`'s `CMD`](https://docs.docker.com/engine/reference/builder/#cmd) directive, where each shell token is a separate string in the array. |
| `alias` (1) | no | 9.4 |Additional alias that can be used to access the service from the job's container. Read [Accessing the services](#accessing-the-services) for more information. |
(1) Alias support for the Kubernetes executor was [introduced](https://gitlab.com/gitlab-org/gitlab-runner/-/issues/2229) in GitLab Runner 12.8, and is only available for Kubernetes version 1.7 or later.
### Starting multiple services from the same image
> Introduced in GitLab and GitLab Runner 9.4. Read more about the [extended configuration options](#extended-docker-configuration-options).
Before the new extended Docker configuration options, the following configuration
would not work properly:
```yaml
services:
- mysql:latest
- mysql:latest
```
The runner would start two containers, each that uses the `mysql:latest` image.
However, both of them would be added to the job's container with the `mysql` alias, based on
the [default hostname naming](#accessing-the-services). This would end with one
of the services not being accessible.
After the new extended Docker configuration options, the above example would
look like:
```yaml
services:
- name: mysql:latest
alias: mysql-1
- name: mysql:latest
alias: mysql-2
```
The runner still starts two containers using the `mysql:latest` image,
however now each of them are also accessible with the alias configured
in `.gitlab-ci.yml` file.
### Setting a command for the service
> Introduced in GitLab and GitLab Runner 9.4. Read more about the [extended configuration options](#extended-docker-configuration-options).
Let's assume you have a `super/sql:latest` image with some SQL database
in it. You would like to use it as a service for your job. Let's also
assume that this image does not start the database process while starting
the container. The user needs to manually use `/usr/bin/super-sql run` as
a command to start the database.
Before the new extended Docker configuration options, you would need to:
- Create your own image based on the `super/sql:latest` image.
- Add the default command.
- Use the image in the job's configuration:
```dockerfile
# my-super-sql:latest image's Dockerfile
FROM super/sql:latest
CMD ["/usr/bin/super-sql", "run"]
```
```yaml
# .gitlab-ci.yml
services:
- my-super-sql:latest
```
After the new extended Docker configuration options, you can
set a `command` in the `.gitlab-ci.yml` file instead:
```yaml
# .gitlab-ci.yml
services:
- name: super/sql:latest
command: ["/usr/bin/super-sql", "run"]
```
The syntax of `command` is similar to [Dockerfile's `CMD`](https://docs.docker.com/engine/reference/builder/#cmd).
### Overriding the entrypoint of an image
> Introduced in GitLab and GitLab Runner 9.4. Read more about the [extended configuration options](#extended-docker-configuration-options).
> Introduced in GitLab and GitLab Runner 9.4. Read more about the [extended configuration options](../docker/using_docker_images.md#extended-docker-configuration-options).
Before showing the available entrypoint override methods, let's describe
how the runner starts. It uses a Docker image for the containers used in the
......@@ -518,8 +218,8 @@ that runner.
To access private container registries, the GitLab Runner process can use:
- [Statically defined credentials](#using-statically-defined-credentials). That is, a username and password for a specific registry.
- [Credentials Store](#using-credentials-store). For more information, read [the relevant Docker documentation](https://docs.docker.com/engine/reference/commandline/login/#credentials-store).
- [Credential Helpers](#using-credential-helpers). For more information, read [the relevant Docker documentation](https://docs.docker.com/engine/reference/commandline/login/#credential-helpers).
- [Credentials Store](#use-a-credentials-store). For more information, read [the relevant Docker documentation](https://docs.docker.com/engine/reference/commandline/login/#credentials-store).
- [Credential Helpers](#use-credential-helpers). For more information, read [the relevant Docker documentation](https://docs.docker.com/engine/reference/commandline/login/#credential-helpers).
To define which should be used, the GitLab Runner process reads the configuration in the following order:
......@@ -545,7 +245,7 @@ runtime.
at least version **1.8** if you want to use private registries.
- Available for [Kubernetes executor](https://docs.gitlab.com/runner/executors/kubernetes.html)
in GitLab Runner 13.1 and later.
- [Credentials Store](#using-credentials-store) and [Credential Helpers](#using-credential-helpers) require binaries to be added to the GitLab Runner's `$PATH`, and require access to do so. Therefore, these features are not available on shared runners, or any other runner where the user does not have access to the environment where the runner is installed.
- [Credentials Store](#use-a-credentials-store) and [Credential Helpers](#use-credential-helpers) require binaries to be added to the GitLab Runner's `$PATH`, and require access to do so. Therefore, these features are not available on shared runners, or any other runner where the user does not have access to the environment where the runner is installed.
### Using statically-defined credentials
......@@ -686,11 +386,9 @@ To add `DOCKER_AUTH_CONFIG` to a runner:
1. Restart the runner service.
### Using Credentials Store
> Support for using Credentials Store was added in GitLab Runner 9.5.
### Use a Credentials Store
To configure credentials store, follow these steps:
To configure a credentials store:
1. To use a credentials store, you need an external helper program to interact with a specific keychain or external store.
Make sure the helper program is available in GitLab Runner `$PATH`.
......@@ -716,7 +414,7 @@ To configure credentials store, follow these steps:
If you use both images from a private registry and public images from Docker Hub,
pulling from Docker Hub fails. Docker daemon tries to use the same credentials for **all** the registries.
### Using Credential Helpers
### Use Credential Helpers
> Support for using Credential Helpers was added in GitLab Runner 12.0
......@@ -771,96 +469,3 @@ To configure access for `aws_account_id.dkr.ecr.region.amazonaws.com`, follow th
You can add configuration for as many registries as you want, adding more
registries to the `"credHelpers"` hash as described above.
## Configuring services
Many services accept environment variables, which you can use to change
database names or set account names, depending on the environment.
GitLab Runner 0.5.0 and up passes all YAML-defined CI/CD variables to the created
service containers.
For all possible configuration variables, check the documentation of each image
provided in their corresponding Docker hub page.
All CI/CD variables are passed to all services containers. It's not
designed to distinguish which variable should go where.
### PostgreSQL service example
Read the specific documentation for
[using PostgreSQL as a service](../services/postgres.md).
### MySQL service example
Read the specific documentation for
[using MySQL as a service](../services/mysql.md).
## How Docker integration works
Below is a high level overview of the steps performed by Docker during job
time.
1. Create any service container: `mysql`, `postgresql`, `mongodb`, `redis`.
1. Create a cache container to store all volumes as defined in `config.toml` and
`Dockerfile` of build image (`ruby:2.6` as in above example).
1. Create a build container and link any service container to build container.
1. Start the build container, and send a job script to the container.
1. Run the job script.
1. Checkout code in: `/builds/group-name/project-name/`.
1. Run any step defined in `.gitlab-ci.yml`.
1. Check the exit status of build script.
1. Remove the build container and all created service containers.
## How to debug a job locally
The following commands are run without root privileges. You should be
able to run Docker with your regular user account.
First start with creating a file named `build_script`:
```shell
cat <<EOF > build_script
git clone https://gitlab.com/gitlab-org/gitlab-runner.git /builds/gitlab-org/gitlab-runner
cd /builds/gitlab-org/gitlab-runner
make
EOF
```
Here we use as an example the GitLab Runner repository which contains a
Makefile, so running `make` executes the commands defined in the Makefile.
Instead of `make`, you could run the command which is specific to your project.
Then create some service containers:
```shell
docker run -d --name service-mysql mysql:latest
docker run -d --name service-postgres postgres:latest
```
This creates two service containers, named `service-mysql` and
`service-postgres` which use the latest MySQL and PostgreSQL images
respectively. They both run in the background (`-d`).
Finally, create a build container by executing the `build_script` file we
created earlier:
```shell
docker run --name build -i --link=service-mysql:mysql --link=service-postgres:postgres ruby:2.6 /bin/bash < build_script
```
The above command creates a container named `build` that's spawned from
the `ruby:2.6` image and has two services linked to it. The `build_script` is
piped using `stdin` to the bash interpreter which in turn executes the
`build_script` in the `build` container.
When you finish testing and no longer need the containers, you can remove them
with:
```shell
docker rm -f -v build service-mysql service-postgres
```
This forcefully (`-f`) removes the `build` container, the two service
containers, and all volumes (`-v`) that were created with the container
creation.
doc/ci/examples/laravel_with_gitlab_and_envoy/index.md
View file @ ec7713eb
......@@ -532,7 +532,7 @@ That's a lot to take in, isn't it? Let's run through it step by step.
[Runners](../../runners/README.md) run the script defined by `.gitlab-ci.yml`.
The `image` keyword tells the runners which image to use.
The `services` keyword defines additional images [that are linked to the main image](../../docker/using_docker_images.md#what-is-a-service).
The `services` keyword defines additional images [that are linked to the main image](../../services/index.md).
Here we use the container image we created before as our main image and also use MySQL 5.7 as a service.
```yaml
......@@ -555,7 +555,7 @@ So we should adjust the configuration of MySQL instance by defining `MYSQL_DATAB
Find out more about MySQL variables at the [official MySQL Docker Image](https://hub.docker.com/_/mysql).
Also set the variables `DB_HOST` to `mysql` and `DB_USERNAME` to `root`, which are Laravel specific variables.
We define `DB_HOST` as `mysql` instead of `127.0.0.1`, as we use MySQL Docker image as a service which [is linked to the main Docker image](../../docker/using_docker_images.md#how-services-are-linked-to-the-job).
We define `DB_HOST` as `mysql` instead of `127.0.0.1`, as we use MySQL Docker image as a service which [is linked to the main Docker image](../../services/index.md#how-services-are-linked-to-the-job).
```yaml
variables:
......
doc/ci/services/index.md
View file @ ec7713eb
......@@ -6,16 +6,375 @@ comments: false
type: index
---
# GitLab CI services examples
# Services
The [`services`](../docker/using_docker_images.md#what-is-a-service)
keyword defines a Docker image that runs during a `job` linked to the
Docker image that the image keyword defines. This allows you to access
the service image during build time.
The `services` keyword defines a Docker image that runs during a `job`
linked to the Docker image that the image keyword defines. This allows
you to access the service image during build time.
The service image can run any application, but the most common use
case is to run a database container, for example:
- [Using MySQL](mysql.md)
- [Using PostgreSQL](postgres.md)
- [Using Redis](redis.md)
- [MySQL](mysql.md)
- [PostgreSQL](postgres.md)
- [Redis](redis.md)
It's easier and faster to use an existing image and run it as an additional container
than to install `mysql`, for example, every time the project is built.
You're not limited to only database services. You can add as many
services you need to `.gitlab-ci.yml` or manually modify `config.toml`.
Any image found at [Docker Hub](https://hub.docker.com/) or your private Container Registry can be
used as a service.
Services inherit the same DNS servers, search domains, and additional hosts as
the CI container itself.
## How services are linked to the job
To better understand how container linking works, read
[Linking containers together](https://docs.docker.com/engine/userguide/networking/default_network/dockerlinks/).
If you add `mysql` as service to your application, the image is
used to create a container that's linked to the job container.
The service container for MySQL is accessible under the hostname `mysql`.
To access your database service, connect to the host named `mysql` instead of a
socket or `localhost`. Read more in [accessing the services](#accessing-the-services).
## How the health check of services works
Services are designed to provide additional features which are **network accessible**.
They may be a database like MySQL, or Redis, and even `docker:stable-dind` which
allows you to use Docker-in-Docker. It can be practically anything that's
required for the CI/CD job to proceed, and is accessed by network.
To make sure this works, the runner:
1. Checks which ports are exposed from the container by default.
1. Starts a special container that waits for these ports to be accessible.
If the second stage of the check fails, it prints the warning: `*** WARNING: Service XYZ probably didn't start properly`.
This issue can occur because:
- There is no opened port in the service.
- The service was not started properly before the timeout, and the port is not
responding.
In most cases it affects the job, but there may be situations when the job
still succeeds even if that warning was printed. For example:
- The service was started shortly after the warning was raised, and the job is
not using the linked service from the beginning. In that case, when the
job needed to access the service, it may have been already there waiting for
connections.
- The service container is not providing any networking service, but it's doing
something with the job's directory (all services have the job directory mounted
as a volume under `/builds`). In that case, the service does its job, and
because the job is not trying to connect to it, it does not fail.
## What services are not for
As mentioned before, this feature is designed to provide **network accessible**
services. A database is the simplest example of such a service.
The services feature is not designed to, and does not, add any software from the
defined `services` image(s) to the job's container.
For example, if you have the following `services` defined in your job, the `php`,
`node` or `go` commands are **not** available for your script, and the job fails:
```yaml
job:
services:
- php:7
- node:latest
- golang:1.10
image: alpine:3.7
script:
- php -v
- node -v
- go version
```
If you need to have `php`, `node` and `go` available for your script, you should
either:
- Choose an existing Docker image that contains all required tools.
- Create your own Docker image, with all the required tools included,
and use that in your job.
## Define `services` in the `.gitlab-ci.yml` file
It's also possible to define different images and services per job:
```yaml
default:
before_script:
- bundle install
test:2.6:
image: ruby:2.6
services:
- postgres:11.7
script:
- bundle exec rake spec
test:2.7:
image: ruby:2.7
services:
- postgres:12.2
script:
- bundle exec rake spec
```
Or you can pass some [extended configuration options](../docker/using_docker_images.md#extended-docker-configuration-options)
for `image` and `services`:
```yaml
default:
image:
name: ruby:2.6
entrypoint: ["/bin/bash"]
services:
- name: my-postgres:11.7
alias: db-postgres
entrypoint: ["/usr/local/bin/db-postgres"]
command: ["start"]
before_script:
- bundle install
test:
script:
- bundle exec rake spec
```
## Accessing the services
Let's say that you need a Wordpress instance to test some API integration with
your application. You can then use for example the
[`tutum/wordpress`](https://hub.docker.com/r/tutum/wordpress/) image in your
`.gitlab-ci.yml` file:
```yaml
services:
- tutum/wordpress:latest
```
If you don't [specify a service alias](#available-settings-for-services),
when the job runs, `tutum/wordpress` is started. You have
access to it from your build container under two hostnames:
- `tutum-wordpress`
- `tutum__wordpress`
Hostnames with underscores are not RFC valid and may cause problems in third-party
applications.
The default aliases for the service's hostname are created from its image name
following these rules:
- Everything after the colon (`:`) is stripped.
- Slash (`/`) is replaced with double underscores (`__`) and the primary alias
is created.
- Slash (`/`) is replaced with a single dash (`-`) and the secondary alias is
created (requires GitLab Runner v1.1.0 or higher).
To override the default behavior, you can
[specify a service alias](#available-settings-for-services).
## Passing CI/CD variables to services
You can also pass custom CI/CD [variables](../variables/README.md)
to fine tune your Docker `images` and `services` directly in the `.gitlab-ci.yml` file.
For more information, read about [`.gitlab-ci.yml` defined variables](../variables/README.md#gitlab-ciyml-defined-variables).
```yaml
# The following variables are automatically passed down to the Postgres container
# as well as the Ruby container and available within each.
variables:
HTTPS_PROXY: "https://10.1.1.1:8090"
HTTP_PROXY: "https://10.1.1.1:8090"
POSTGRES_DB: "my_custom_db"
POSTGRES_USER: "postgres"
POSTGRES_PASSWORD: "example"
PGDATA: "/var/lib/postgresql/data"
POSTGRES_INITDB_ARGS: "--encoding=UTF8 --data-checksums"
services:
- name: postgres:11.7
alias: db
entrypoint: ["docker-entrypoint.sh"]
command: ["postgres"]
image:
name: ruby:2.6
entrypoint: ["/bin/bash"]
before_script:
- bundle install
test:
script:
- bundle exec rake spec
```
## Available settings for `services`
> Introduced in GitLab and GitLab Runner 9.4.
| Setting | Required | GitLab version | Description |
|------------|----------|----------------| ----------- |
| `name` | yes, when used with any other option | 9.4 | Full name of the image to use. It should contain the Registry part if needed. |
| `entrypoint` | no | 9.4 |Command or script to execute as the container's entrypoint. It's translated to Docker's `--entrypoint` option while creating the container. The syntax is similar to [`Dockerfile`'s `ENTRYPOINT`](https://docs.docker.com/engine/reference/builder/#entrypoint) directive, where each shell token is a separate string in the array. |
| `command` | no | 9.4 |Command or script that should be used as the container's command. It's translated to arguments passed to Docker after the image's name. The syntax is similar to [`Dockerfile`'s `CMD`](https://docs.docker.com/engine/reference/builder/#cmd) directive, where each shell token is a separate string in the array. |
| `alias` (1) | no | 9.4 |Additional alias that can be used to access the service from the job's container. Read [Accessing the services](#accessing-the-services) for more information. |
(1) Alias support for the Kubernetes executor was [introduced](https://gitlab.com/gitlab-org/gitlab-runner/-/issues/2229) in GitLab Runner 12.8, and is only available for Kubernetes version 1.7 or later.
## Starting multiple services from the same image
> Introduced in GitLab and GitLab Runner 9.4. Read more about the [extended configuration options](../docker/using_docker_images.md#extended-docker-configuration-options).
Before the new extended Docker configuration options, the following configuration
would not work properly:
```yaml
services:
- mysql:latest
- mysql:latest
```
The runner would start two containers, each that uses the `mysql:latest` image.
However, both of them would be added to the job's container with the `mysql` alias, based on
the [default hostname naming](#accessing-the-services). This would end with one
of the services not being accessible.
After the new extended Docker configuration options, the above example would
look like:
```yaml
services:
- name: mysql:latest
alias: mysql-1
- name: mysql:latest
alias: mysql-2
```
The runner still starts two containers using the `mysql:latest` image,
however now each of them are also accessible with the alias configured
in `.gitlab-ci.yml` file.
## Setting a command for the service
> Introduced in GitLab and GitLab Runner 9.4. Read more about the [extended configuration options](../docker/using_docker_images.md#extended-docker-configuration-options).
Let's assume you have a `super/sql:latest` image with some SQL database
in it. You would like to use it as a service for your job. Let's also
assume that this image does not start the database process while starting
the container. The user needs to manually use `/usr/bin/super-sql run` as
a command to start the database.
Before the new extended Docker configuration options, you would need to:
- Create your own image based on the `super/sql:latest` image.
- Add the default command.
- Use the image in the job's configuration:
```dockerfile
# my-super-sql:latest image's Dockerfile
FROM super/sql:latest
CMD ["/usr/bin/super-sql", "run"]
```
```yaml
# .gitlab-ci.yml
services:
- my-super-sql:latest
```
After the new extended Docker configuration options, you can
set a `command` in the `.gitlab-ci.yml` file instead:
```yaml
# .gitlab-ci.yml
services:
- name: super/sql:latest
command: ["/usr/bin/super-sql", "run"]
```
The syntax of `command` is similar to [Dockerfile's `CMD`](https://docs.docker.com/engine/reference/builder/#cmd).
## How Docker integration works
Below is a high level overview of the steps performed by Docker during job
time.
1. Create any service container: `mysql`, `postgresql`, `mongodb`, `redis`.
1. Create a cache container to store all volumes as defined in `config.toml` and
`Dockerfile` of build image (`ruby:2.6` as in above example).
1. Create a build container and link any service container to build container.
1. Start the build container, and send a job script to the container.
1. Run the job script.
1. Checkout code in: `/builds/group-name/project-name/`.
1. Run any step defined in `.gitlab-ci.yml`.
1. Check the exit status of build script.
1. Remove the build container and all created service containers.
## Debug a job locally
The following commands are run without root privileges. You should be
able to run Docker with your regular user account.
First start with creating a file named `build_script`:
```shell
cat <<EOF > build_script
git clone https://gitlab.com/gitlab-org/gitlab-runner.git /builds/gitlab-org/gitlab-runner
cd /builds/gitlab-org/gitlab-runner
make
EOF
```
Here we use as an example the GitLab Runner repository which contains a
Makefile, so running `make` executes the commands defined in the Makefile.
Instead of `make`, you could run the command which is specific to your project.
Then create some service containers:
```shell
docker run -d --name service-mysql mysql:latest
docker run -d --name service-postgres postgres:latest
```
This creates two service containers, named `service-mysql` and
`service-postgres` which use the latest MySQL and PostgreSQL images
respectively. They both run in the background (`-d`).
Finally, create a build container by executing the `build_script` file we
created earlier:
```shell
docker run --name build -i --link=service-mysql:mysql --link=service-postgres:postgres ruby:2.6 /bin/bash < build_script
```
The above command creates a container named `build` that's spawned from
the `ruby:2.6` image and has two services linked to it. The `build_script` is
piped using `stdin` to the bash interpreter which in turn executes the
`build_script` in the `build` container.
When you finish testing and no longer need the containers, you can remove them
with:
```shell
docker rm -f -v build service-mysql service-postgres
```
This forcefully (`-f`) removes the `build` container, the two service
containers, and all volumes (`-v`) that were created with the container
creation.
doc/ci/services/postgres.md
View file @ ec7713eb
......@@ -45,7 +45,7 @@ Database: nice_marmot
```
If you're wondering why we used `postgres` for the `Host`, read more at
[How services are linked to the job](../docker/using_docker_images.md#how-services-are-linked-to-the-job).
[How services are linked to the job](../services/index.md#how-services-are-linked-to-the-job).
You can also use any other Docker image available on [Docker Hub](https://hub.docker.com/_/postgres).
For example, to use PostgreSQL 9.3, the service becomes `postgres:9.3`.
......
doc/ci/yaml/README.md
View file @ ec7713eb
......@@ -512,7 +512,7 @@ Use `image` to specify [a Docker image](../docker/using_docker_images.md#what-is
For:
- Usage examples, see [Define `image` and `services` from `.gitlab-ci.yml`](../docker/using_docker_images.md#define-image-and-services-from-gitlab-ciyml).
- Usage examples, see [Define `image` in the `.gitlab-ci.yml` file](../docker/using_docker_images.md#define-image-in-the-gitlab-ciyml-file).
- Detailed usage information, refer to [Docker integration](../docker/index.md) documentation.
#### `image:name`
......@@ -529,11 +529,11 @@ For more information, see [Available settings for `image`](../docker/using_docke
#### `services`
Use `services` to specify a [service Docker image](../docker/using_docker_images.md#what-is-a-service), linked to a base image specified in [`image`](#image).
Use `services` to specify a [service Docker image](../services/index.md), linked to a base image specified in [`image`](#image).
For:
- Usage examples, see [Define `image` and `services` from `.gitlab-ci.yml`](../docker/using_docker_images.md#define-image-and-services-from-gitlab-ciyml).
- Usage examples, see [Define `services` in the `.gitlab-ci.yml` file](../services/index.md#define-services-in-the-gitlab-ciyml-file).
- Detailed usage information, refer to [Docker integration](../docker/index.md) documentation.
- Example services, see [GitLab CI/CD Services](../services/index.md).
......@@ -541,25 +541,25 @@ For:
An [extended Docker configuration option](../docker/using_docker_images.md#extended-docker-configuration-options).
For more information, see [Available settings for `services`](../docker/using_docker_images.md#available-settings-for-services).
For more information, see [Available settings for `services`](../services/index.md#available-settings-for-services).
##### `services:alias`
An [extended Docker configuration option](../docker/using_docker_images.md#extended-docker-configuration-options).
For more information, see [Available settings for `services`](../docker/using_docker_images.md#available-settings-for-services).
For more information, see [Available settings for `services`](../services/index.md#available-settings-for-services).
##### `services:entrypoint`
An [extended Docker configuration option](../docker/using_docker_images.md#extended-docker-configuration-options).
For more information, see [Available settings for `services`](../docker/using_docker_images.md#available-settings-for-services).
For more information, see [Available settings for `services`](../services/index.md#available-settings-for-services).
##### `services:command`
An [extended Docker configuration option](../docker/using_docker_images.md#extended-docker-configuration-options).
For more information, see [Available settings for `services`](../docker/using_docker_images.md#available-settings-for-services).
For more information, see [Available settings for `services`](../services/index.md#available-settings-for-services).
### `script`
......@@ -4590,7 +4590,7 @@ If a variable of the same name is defined globally and for a specific job, the
[job-specific variable overrides the global variable](../variables/README.md#priority-of-cicd-variables).
All YAML-defined variables are also set to any linked
[Docker service containers](../docker/using_docker_images.md#what-is-a-service).
[Docker service containers](../services/index.md).
You can use [YAML anchors for variables](#yaml-anchors-for-variables).
......
doc/user/application_security/dast/index.md
View file @ ec7713eb
......@@ -155,7 +155,7 @@ on how to configure Review Apps for DAST.
If your application utilizes Docker containers you have another option for deploying and scanning with DAST.
After your Docker build job completes and your image is added to your container registry, you can utilize the image as a
[service](../../../ci/docker/using_docker_images.md#what-is-a-service).
[service](../../../ci/services/index.md).
By using service definitions in your `gitlab-ci.yml`, you can scan services with the DAST analyzer.
......
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