--- date: "2020-03-19T19:27:00+02:00" title: "Installation with Docker" slug: "install-with-docker" weight: 10 toc: true draft: false menu: sidebar: parent: "installation" name: "With Docker" weight: 10 identifier: "install-with-docker" --- # Installation with Docker Gitea provides automatically updated Docker images within its Docker Hub organization. It is possible to always use the latest stable tag or to use another service that handles updating Docker images. This reference setup guides users through the setup based on `docker-compose`, but the installation of `docker-compose` is out of scope of this documentation. To install `docker-compose` itself, follow the official [install instructions](https://docs.docker.com/compose/install/). ## Basics The most simple setup just creates a volume and a network and starts the `gitea/gitea:latest` image as a service. Since there is no database available, one can be initialized using SQLite3. Create a directory like `gitea` and paste the following content into a file named `docker-compose.yml`. Note that the volume should be owned by the user/group with the UID/GID specified in the config file. If you don't give the volume correct permissions, the container may not start. Also be aware that the tag `:latest` will install the current development version. For a stable release you can use `:1` or specify a certain release like `:{{< version >}}`. ```yaml version: "2" networks: gitea: external: false services: server: image: gitea/gitea:latest environment: - USER_UID=1000 - USER_GID=1000 restart: always networks: - gitea volumes: - ./gitea:/data - /etc/timezone:/etc/timezone:ro - /etc/localtime:/etc/localtime:ro ports: - "3000:3000" - "222:22" ``` ## Custom port To bind the integrated openSSH daemon and the webserver on a different port, adjust the port section. It's common to just change the host port and keep the ports within the container like they are. ```diff version: "2" networks: gitea: external: false services: server: image: gitea/gitea:latest environment: - USER_UID=1000 - USER_GID=1000 restart: always networks: - gitea volumes: - ./gitea:/data - /etc/timezone:/etc/timezone:ro - /etc/localtime:/etc/localtime:ro ports: - - "3000:3000" - - "222:22" + - "8080:3000" + - "2221:22" ``` ## MySQL database To start Gitea in combination with a MySQL database, apply these changes to the `docker-compose.yml` file created above. ```diff version: "2" networks: gitea: external: false services: server: image: gitea/gitea:latest environment: - USER_UID=1000 - USER_GID=1000 + - DB_TYPE=mysql + - DB_HOST=db:3306 + - DB_NAME=gitea + - DB_USER=gitea + - DB_PASSWD=gitea restart: always networks: - gitea volumes: - ./gitea:/data - /etc/timezone:/etc/timezone:ro - /etc/localtime:/etc/localtime:ro ports: - "3000:3000" - "222:22" + depends_on: + - db + + db: + image: mysql:5.7 + restart: always + environment: + - MYSQL_ROOT_PASSWORD=gitea + - MYSQL_USER=gitea + - MYSQL_PASSWORD=gitea + - MYSQL_DATABASE=gitea + networks: + - gitea + volumes: + - ./mysql:/var/lib/mysql ``` ## PostgreSQL database To start Gitea in combination with a PostgreSQL database, apply these changes to the `docker-compose.yml` file created above. ```diff version: "2" networks: gitea: external: false services: server: image: gitea/gitea:latest environment: - USER_UID=1000 - USER_GID=1000 + - DB_TYPE=postgres + - DB_HOST=db:5432 + - DB_NAME=gitea + - DB_USER=gitea + - DB_PASSWD=gitea restart: always networks: - gitea volumes: - ./gitea:/data - /etc/timezone:/etc/timezone:ro - /etc/localtime:/etc/localtime:ro ports: - "3000:3000" - "222:22" + depends_on: + - db + + db: + image: postgres:9.6 + restart: always + environment: + - POSTGRES_USER=gitea + - POSTGRES_PASSWORD=gitea + - POSTGRES_DB=gitea + networks: + - gitea + volumes: + - ./postgres:/var/lib/postgresql/data ``` ## Named volumes To use named volumes instead of host volumes, define and use the named volume within the `docker-compose.yml` configuration. This change will automatically create the required volume. You don't need to worry about permissions with named volumes; Docker will deal with that automatically. ```diff version: "2" networks: gitea: external: false +volumes: + gitea: + driver: local + services: server: image: gitea/gitea:latest restart: always networks: - gitea volumes: - - ./gitea:/data + - gitea:/data - /etc/timezone:/etc/timezone:ro - /etc/localtime:/etc/localtime:ro ports: - "3000:3000" - "222:22" ``` MySQL or PostgreSQL containers will need to be created separately. ## Start To start this setup based on `docker-compose`, execute `docker-compose up -d`, to launch Gitea in the background. Using `docker-compose ps` will show if Gitea started properly. Logs can be viewed with `docker-compose logs`. To shut down the setup, execute `docker-compose down`. This will stop and kill the containers. The volumes will still exist. Notice: if using a non-3000 port on http, change app.ini to match `LOCAL_ROOT_URL = http://localhost:3000/`. ## Install After starting the Docker setup via `docker-compose`, Gitea should be available using a favorite browser to finalize the installation. Visit http://server-ip:3000 and follow the installation wizard. If the database was started with the `docker-compose` setup as documented above, please note that `db` must be used as the database hostname. ## Environments variables You can configure some of Gitea's settings via environment variables: (Default values are provided in **bold**) * `APP_NAME`: **"Gitea: Git with a cup of tea"**: Application name, used in the page title. * `RUN_MODE`: **dev**: For performance and other purposes, change this to `prod` when deployed to a production environment. * `DOMAIN`: **localhost**: Domain name of this server, used for the displayed http clone URL in Gitea's UI. * `SSH_DOMAIN`: **localhost**: Domain name of this server, used for the displayed ssh clone URL in Gitea's UI. If the install page is enabled, SSH Domain Server takes DOMAIN value in the form (which overwrite this setting on save). * `SSH_PORT`: **22**: SSH port displayed in clone URL. * `SSH_LISTEN_PORT`: **%(SSH\_PORT)s**: Port for the built-in SSH server. * `DISABLE_SSH`: **false**: Disable SSH feature when it's not available. * `HTTP_PORT`: **3000**: HTTP listen port. * `ROOT_URL`: **""**: Overwrite the automatically generated public URL. This is useful if the internal and the external URL don't match (e.g. in Docker). * `LFS_START_SERVER`: **false**: Enables git-lfs support. * `DB_TYPE`: **sqlite3**: The database type in use \[mysql, postgres, mssql, sqlite3\]. * `DB_HOST`: **localhost:3306**: Database host address and port. * `DB_NAME`: **gitea**: Database name. * `DB_USER`: **root**: Database username. * `DB_PASSWD`: **"\"**: Database user password. Use \`your password\` for quoting if you use special characters in the password. * `INSTALL_LOCK`: **false**: Disallow access to the install page. * `SECRET_KEY`: **""**: Global secret key. This should be changed. If this has a value and `INSTALL_LOCK` is empty, `INSTALL_LOCK` will automatically set to `true`. * `DISABLE_REGISTRATION`: **false**: Disable registration, after which only admin can create accounts for users. * `REQUIRE_SIGNIN_VIEW`: **false**: Enable this to force users to log in to view any page. * `USER_UID`: **1000**: The UID (Unix user ID) of the user that runs Gitea within the container. Match this to the UID of the owner of the `/data` volume if using host volumes (this is not necessary with named volumes). * `USER_GID`: **1000**: The GID (Unix group ID) of the user that runs Gitea within the container. Match this to the GID of the owner of the `/data` volume if using host volumes (this is not necessary with named volumes). # Customization Customization files described [here](https://docs.gitea.io/en-us/customizing-gitea/) should be placed in `/data/gitea` directory. If using host volumes, it's quite easy to access these files; for named volumes, this is done through another container or by direct access at `/var/lib/docker/volumes/gitea_gitea/_data`. The configuration file will be saved at `/data/gitea/conf/app.ini` after the installation. # Upgrading :exclamation::exclamation: **Make sure you have volumed data to somewhere outside Docker container** :exclamation::exclamation: To upgrade your installation to the latest release: ``` # Edit `docker-compose.yml` to update the version, if you have one specified # Pull new images docker-compose pull # Start a new container, automatically removes old one docker-compose up -d ``` # SSH Container Passthrough Since SSH is running inside the container, you'll have to pass SSH from the host to the container if you wish to use SSH support. If you wish to do this without running the container SSH on a non-standard port (or move your host port to a non-standard port), you can forward SSH connections destined for the container with a little extra setup. This guide assumes that you have created a user on the host called `git` which shares the same UID/GID as the container values `USER_UID`/`USER_GID`. You should also create the directory `/var/lib/gitea` on the host, owned by the `git` user and mounted in the container, e.g. ``` services: server: image: gitea/gitea:latest environment: - USER_UID=1000 - USER_GID=1000 restart: always networks: - gitea volumes: - /var/lib/gitea:/data - /etc/timezone:/etc/timezone:ro - /etc/localtime:/etc/localtime:ro ports: - "3000:3000" - "127.0.0.1:2222:22" ``` You can see that we're also exposing the container SSH port to port 2222 on the host, and binding this to 127.0.0.1 to prevent it being accessible external to the host machine itself. On the **host**, you should create the file `/app/gitea/gitea` with the following contents and make it executable (`chmod +x /app/gitea/gitea`): ``` #!/bin/sh ssh -p 2222 -o StrictHostKeyChecking=no git@127.0.0.1 "SSH_ORIGINAL_COMMAND=\"$SSH_ORIGINAL_COMMAND\" $0 $@" ``` Your `git` user needs to have an SSH key generated: ``` sudo -u git ssh-keygen -t rsa -b 4096 -C "Gitea Host Key" ``` Still on the host, symlink the container `.ssh/authorized_keys` file to your git user `.ssh/authorized_keys`. This can be done on the host as the `/var/lib/gitea` directory is mounted inside the container under `/data`: ``` ln -s /var/lib/gitea/git/.ssh/authorized_keys /home/git/.ssh/authorized_keys ``` Then echo the `git` user SSH key into the authorized_keys file so the host can talk to the container over SSH: ``` echo "no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty $(cat /home/git/.ssh/id_rsa.pub)" >> /var/lib/gitea/git/.ssh/authorized_keys ``` Now you should be able to use Git over SSH to your container without disrupting SSH access to the host. Please note: SSH container passthrough will work only if using opensshd in container, and will not work if `AuthorizedKeysCommand` is used in combination with setting `SSH_CREATE_AUTHORIZED_KEYS_FILE=false` to disable authorized files key generation.