mirror of
https://github.com/mailscope/kumomta.git
synced 2026-08-19 19:08:17 +00:00
Tom Mairs
90 lines
2.6 KiB
Markdown
90 lines
2.6 KiB
Markdown
# Installing KumoMTA in a Docker container
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To build a lightweight alpine-based docker image:
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- Prepare your system with the needed essentials (see[ System Preparation](./system_preparation.md))
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- Ensure docker is actually installed in your server instance.
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## APT based systems
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In Ubuntu, Debian, and other Debial APT package management systems:
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```bash
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sudo apt update
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sudo apt install -y apt-utils docker.io
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sudo snap install docker
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```
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## DNF based systems
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In Rocky, Alma, and any other DNF package manager system
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```bash
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sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
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sudo dnf update -y
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sudo dnf install -y docker-ce docker-ce-cli containerd.io
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sudo systemctl enable docker
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```
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If you get an error that `/etc/rc.d/rc.local is not marked executable` then make it executable with `sudo chmod +x /etc/rc.d/rc.local`
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### Start Docker
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`sudo systemctl start docker`
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### Check if Docker is running
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`systemctl status docker`
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### Enable Non-Root User Access
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After completing Step 3, you can use Docker by prepending each command with sudo. To eliminate the need for administrative access authorization, set up a non-root user access by following the steps below.
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1. Use the usermod command to add the user to the docker system group.
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`sudo usermod -aG docker $USER`
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2. Confirm the user is a member of the docker group by typing:
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`id $USER`
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It is a good idea to restart to make sure it is all set correctly (init 6)
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### Build the docker image
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At the time of this writing, the Docker image needs to be built from the project repo. You will need to clone the repo and then build the image from `./docker`.
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```bash
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sudo dnf install -y git
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git clone https://github.com/kumomta/kumomta.git
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cd kumomta/docker/redis/
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sudo docker build -t redis-cell .
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docker run --name redis -p 6379:6379 -d redis-cell
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cd ../..
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sudo ./docker/kumod/build-docker-image.sh
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```
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This should result in something roughly like this:
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```bash
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docker image ls kumomta/kumod
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REPOSITORY TAG IMAGE ID CREATED SIZE
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kumomta/kumod latest bbced15ff4d1 3 minutes ago 116MB
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```
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You can then run that image; this invocation mounts the kumo src dir at `/config` and then the `KUMO_POLICY` environment
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variable is used to override the default `/config/policy.lua` path to use the SMTP sink policy script [sink.lua](https://github.com/kumomta/kumomta/blob/main/sink.lua), which will accept and discard all mail:
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```bash
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$ sudo docker run --rm -p 2025:25 \
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-v .:/config \
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--name kumo-sink \
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--env KUMO_POLICY="/config/sink.lua" \
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kumomta/kumod
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```
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