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  1. Install and configure Docker CE:

    curl -fsSL https://get.docker.com -o get-docker.sh
    sudo sh get-docker.sh
    sudo usermod -aG docker $(whoami)
    docker login

    If you prefer to perform these steps manually:

    Note: MM-9791 introduced using docker-compose to manage containers. To preserve your data on upgrade, execute the following steps.

    First, backup from any existing containers:

    mysqldump -h 127.0.0.1 --column-statistics=0 -u mmuser -p mattermost_test > mm_mysql_backup.sql
    pg_dump -U mmuser -W -d mattermost_test -h 127.0.0.1 > mm_postgres_backup.bak

    Then after upgrading and starting the new docker-compose managed containers, restore the data:

    mysql -u mmuser -p -h 127.0.0.1 mattermost_test < mm_mysql_backup.sql
    psql -U mmuser -W -h 127.0.0.1 -f mm_postgres_backup.bak mattermost_test

    If you don’t migrate your data, the new, docker-compose-managed containers will start out empty. To remove the old containers – destroying any existing data – use make clean-old-docker.

  2. Install Go:

    sudo yum group install "Development Tools"
    sudo yum install -y wget libpng12
    sudo rm -rf /usr/local/go
    wget https://storage.googleapis.com/golang/go1.12.linux-amd64.tar.gz
    sudo tar -C /usr/local -xzf go1.12.linux-amd64.tar.gz
  3. Update your shell’s initialization script (e.g. .bashrc or .zshrc) and add the following:

    export GOPATH=$HOME/go
    export PATH=$PATH:$GOPATH/bin
    export PATH=$PATH:/usr/local/go/bin
  4. Edit /etc/security/limits.conf as an administrator (e.g. sudo) and add the following lines, replacing {username} with your username:

    {username}  soft  nofile  8096
    {username}  hard  nofile  8096
  5. Logout and login to effect the changes above.

  6. Fork https://github.com/mattermost/mattermost-server

  7. Clone the Mattermost source code from your fork:

    export GITHUB_USERNAME=my_username
    mkdir -p $(go env GOPATH)/src/github.com/mattermost
    git clone https://github.com/$GITHUB_USERNAME/mattermost-server.git $(go env GOPATH)/src/github.com/mattermost/mattermost-server
  8. Start the server and test your environment:

    cd $(go env GOPATH)/src/github.com/mattermost/mattermost-server
    make run-server
    curl http://localhost:8065/api/v4/system/ping
    make stop-server

    If successful, the curl step will return a JSON object:

    {"AndroidLatestVersion":"","AndroidMinVersion":"","DesktopLatestVersion":"","DesktopMinVersion":"","IosLatestVersion":"","IosMinVersion":"","status":"OK"}

    Note: Browsing directly to http://localhost:8065/ will display a 404 Not Found until the web app is configured. See Web App Developer Setup and Mobile App Developer Setup for additional setup.