= Docker-Compose Template

.Provided Templates:
|===
|Name |Description
|.docker-compose-deploy | Executes Docker Compose against a remote maschine.
|.docker-compose-validate | Validates the syntactic correctness of your compose files. Still can have execution Problems.
|===

Copy files with scp from your repository onto the remote system.
Then executes `docker compose` over a SSH connection.
For this SSH connection you have to provide an SSH key under a CI-CD-Variable with the name $SSH_PRIVATE_KEY.
If you already have a different $SSH_PRIVATE_KEY you can overwrite the variable SSH_PRIVATE_KEY_DEPLOY.

To parametrise the docker-compose file you can use a .env file.
The .env file should not contain any secrets.
For this reason you can create a .env file dynamically.
To generate a .env file you can provide a script under the path ENV_SETUP_FILE.

.Beispiel für ein setup_env.sh
----
#!/bin/sh

#Prints all Enviroments into the .env File.
printenv >> .env

#to set a different project prefix use this ENV
echo COMPOSE_PROJECT_NAME=project-prefix >>.env

#Secrets
#Some Secret is a Variable within the gitlab CI Variable
echo SOME_PASSWORD="$SOME_PASSWORD" >>.env
----

== SSH Problem workaround

Sometimes there is a problem with some SSH servers and docker.
We have a workaround for this, please override your script with the following:

----
  script:
    - !reference [.broken-ssh-connection-workaround, script]
----

.Variables
|===

|Name |Description | Default Value
| SSH_PRIVATE_KEY_DEPLOY
| Private key to access remote system.
| $SSH_PRIVATE_KEY (In den CI-CD variablen)

| SSH_URL
| URL of the remote server.
| -

| SSH_PORT
| SSH port of the remote server.
| 22

| SSH_USER
| The user that is used to log into the remote maschine.
| -

| DOCKER_REGISTRY
| The container registry that will be used to pull images.
| "$CI_REGISTRY"

| DOCKER_REGISTRY_PASS
| The passwort to the docker registry that should be used.
| "$CI_REGISTRY_PASSWORD"

| DOCKER_REGISTRY_USER
| The user to the docker registry that should be used.
| "$CI_REGISTRY_USER"

| ENV_SETUP_FILE
| If you want to use a .env file, this script can be used to create one.
Secrets should not be stored within your repository. Use the CI-CD variables in the gitlab setting page.
| "setup_env.sh"

| SCP_DESTINATION
| Target path for scp to push files to.
| -

| SCP_SOURCE
| Path you want to copy to the remote system.
| $CI_PROJECT_DIR

| COMPOSE_EXTRA_ARGS
| Additional arguments you want to send to docker compose.
For example multiple `-f compose.file.extra` definitions.
| -

| COMPOSE_UP_EXTRA_ARGS
| Additional arguments you want to send to docker compose up.
For example multiple `--no-deps --no-build` definitions.
| -
|===

:template: IaC/docker-compose.gitlab-ci.yml
include::../../../template-printer.adoc[]