Install Ssh Docker

  • Then, we will need to install a text editor; we will need it to edit configuration files. For example: # start an interactive Bash session in the container docker exec -ti debian bash apt-get -y update apt-get -y upgrade apt-get -y install vim. Now we are ready to install MariaDB in the way we prefer.
  • By default docker does not have sudo installed, hence the need to install it along with the open ssh server. On line 3 i create a user called test and add it to the sudo group. Echo 'test:test' chpasswd sets the password for the user test to test. Line 5 starts the ssh service and line 6 tells docker the container listens on port 22.
  1. Install Ssh Ubuntu
  2. Install Ssh Docker Linux
  3. Install Ssh Dockerfile
  4. Install Ssh Docker Download
  5. Setup Ssh Docker Container

May 26, 2020 By default docker does not have sudo installed, hence the need to install it along with the open ssh server. On line 3 i create a user called test and add it to the sudo group. Echo 'test:test' chpasswd sets the password for the user test to test. Line 5 starts the ssh service and line 6 tells docker the container listens on port 22. Enable SSH on CentOS 7: yum –y install openssh-server openssh-clients service sshd start service sshd enable service sshd status Step 2: Get IP Address of Container. Get the container’s IP address by using the docker inspect command and filtering out the results. For modern Docker engines, use the command.

Gitea provides automatically updated Docker images within its Docker Hub organization. It ispossible to always use the latest stable tag or to use another service that handles updatingDocker images.

  • The latest release of the RHEL 8 / CentOS 8. Red Hat has built its own tools, buildah and podman, which aim to be compatible with existing docker images and work without relying on a daemon, allowing the creation of containers as normal users, without the need of special permissions (with some limitations: e.g. At the moment of writing, it's still not possible to map host ports to the.
  • The procedure to install Docker is as follows: Open the terminal application or login to the remote box using ssh command: ssh [email protected]; Type the following command to install Docker via yum provided by Red Hat: sudo yum install docker; Type the following command to install the latest version of Docker CE (community edition).
  • Docker uses virtualization technology to provide isolated containers for software and tools. These containers use well-defined channels to communicate with each other. This article will show you the easiest way to install Docker on Ubuntu 20.04 and get it running in less than 5 minutes.
  • The skeleton also provides a docker-compose.yml for use with docker-compose; it uses the Dockerfile provided as its base. Build and start the image using: Build and start the image using: $ docker-compose up -d -build.

A docker container exits when its main process finishes. In this case it will exit when your script ends. I don't know enough about hadoop to tell you how to do it in this case, but you need to either leave something running in the foreground or use a process manager such as runit or supervisord to run the processes.

This reference setup guides users through the setup based on docker-compose, but the installationof docker-compose is out of scope of this documentation. To install docker-compose itself, followthe official install instructions.

Table of Contents


The most simple setup just creates a volume and a network and starts the gitea/gitea:latestimage 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 :1.13.3.


To bind the integrated openSSH daemon and the webserver on a different port, adjustthe port section. It’s common to just change the host port and keep the ports withinthe container like they are.


MySQL database

To start Gitea in combination with a MySQL database, apply these changes to thedocker-compose.yml file created above.

PostgreSQL database

To start Gitea in combination with a PostgreSQL database, apply these changes tothe docker-compose.yml file created above.

Named volumes

Install Ssh In Docker Container Design

To use named volumes instead of host volumes, define and use the named volumewithin the docker-compose.yml configuration. This change will automaticallycreate the required volume. You don’t need to worry about permissions withnamed volumes; Docker will deal with that automatically.

MySQL or PostgreSQL containers will need to be created separately.


Install Ssh Key In Docker Container

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 Giteastarted properly. Logs can be viewed with docker-compose logs.

To shut down the setup, execute docker-compose down. This will stopand kill the containers. The volumes will still exist.

Notice: if using a non-3000 port on http, change app.ini to matchLOCAL_ROOT_URL = http://localhost:3000/.


After starting the Docker setup via docker-compose, Gitea should be available using afavorite browser to finalize the installation. Visit http://server-ip:3000 and follow theinstallation wizard. If the database was started with the docker-compose setup asdocumented above, please note that db must be used as the database hostname.

Environment 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: prod: Application run mode, affects performance and debugging. Either “dev”, “prod” or “test”.
  • 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. If you want to disable SSH feature, you should set SSH port to 0 when installing Gitea.
  • 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: '<empty>”: 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).

Install Ssh Ubuntu


Customization files described here shouldbe placed in /data/gitea directory. If using host volumes, it’s quite easy to access thesefiles; 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.


❗❗ Make sure you have volumed data to somewhere outside Docker container ❗❗

To upgrade your installation to the latest release:

Managing Deployments With Environment Variables

In addition to the environment variables above, any settings in app.ini can be set or overridden with an environment variable of the form: GITEA__SECTION_NAME__KEY_NAME. These settings are applied each time the docker container starts. Full information here.

These environment variables can be passed to the docker container in docker-compose.yml. The following example will enable an smtp mail server if the required env variables GITEA__mailer__FROM, GITEA__mailer__HOST, GITEA__mailer__PASSWD are set on the host or in a .env file in the same directory as docker-compose.yml:

To set required TOKEN and SECRET values, consider using gitea’s built-in generate utility functions.

SSH Container Passthrough

Since SSH is running inside the container, SSH needs to be passed through from the host to the container if SSH support is desired. One option would be to run the container SSH on a non-standard port (or moving the host port to a non-standard port). Another option which might be more straightforward is to forward SSH connections from the host to the container. This setup is explained in the following.

Install Ssh Docker Linux

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. These values can be set as environment variables in the docker-compose.yml:

Next mount /home/git/.ssh of the host into the container. Otherwise the SSH authentication cannot work inside the container.

Install Ssh Dockerfile

Now a SSH key pair needs to be created on the host. This key pair will be used to authenticate the git user on the host to the container.

In the next step a file named /app/gitea/gitea (with executable permissions) needs to be created on the host. This file will issue the SSH forwarding from the host to the container. Add the following contents to /app/gitea/gitea:

Install Ssh In Docker Container


To make the forwarding work, the SSH port of the container (22) needs to be mapped to the host port 2222 in docker-compose.yml . Since this port does not need to be exposed to the outside world, it can be mapped to the localhost of the host machine:

In addition, /home/git/.ssh/authorized_keys on the host needs to be modified. It needs to act in the same way as authorized_keys within the Gitea container. Therefore add the public key of the key you created above (“Gitea Host Key”) to ~/git/.ssh/authorized_keys.This can be done via echo '$(cat /home/git/.ssh/' >> /home/git/.ssh/authorized_keys.Important: The pubkey from the git user needs to be added “as is” while all other pubkeys added via the Gitea web interface will be prefixed with command='/app [...].

The file should then look somewhat like

Here is a detailed explanation what is happening when a SSH request is made:

Install Ssh Docker Download

  1. A SSH request is made against the host (usually port 22) using the git user, e.g. git clone [email protected]:user/repo.git.
  2. In /home/git/.ssh/authorized_keys , the command executes the /app/gitea/gitea script.
  3. /app/gitea/gitea forwards the SSH request to port 2222 which is mapped to the SSH port (22) of the container.
  4. Due to the existence of the public key of the git user in /home/git/.ssh/authorized_keys the authentication host → container succeeds and the SSH request get forwarded to Gitea running in the docker container.
Install Ssh Docker

If a new SSH key is added in the Gitea web interface, it will be appended to .ssh/authorized_keys in the same way as the already existing key.

Setup Ssh Docker Container


SSH container passthrough will work only if

  • opensshd is used in the container
  • if AuthorizedKeysCommand is not used in combination with SSH_CREATE_AUTHORIZED_KEYS_FILE=false to disable authorized files key generation
  • LOCAL_ROOT_URL is not changed