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h1. Podman

h2. install

<pre><code class="shell">

yum install podman

yum install podman-compose

</code></pre>

h2. create pod

<pre><code class="shell">

sudo podman pod create --name=app-example -p 8099:80

</code></pre>

h3. add container to pod

e.g. wordpress

<pre><code class="shell">

sudo mkdir /opt/podman.pod

sudo mkdir /opt/podman.pod/app-example

sudo mkdir /opt/podman.pod/app-example/c_db

sudo mkdir /opt/podman.pod/app-example/c_db/var

sudo mkdir /opt/podman.pod/app-example/c_db/var/lib

sudo mkdir /opt/podman.pod/app-example/c_db/var/lib/mysql

sudo mkdir /opt/podman.pod/app-example/c_wp

sudo mkdir /opt/podman.pod/app-example/c_wp/var

sudo mkdir /opt/podman.pod/app-example/c_wp/var/www

sudo mkdir /opt/podman.pod/app-example/c_wp/var/www/html

</code></pre>

<pre><code class="shell">

sudo podman run -d --restart=always --pod=app-example -e MYSQL_ROOT_PASSWORD="root" -e MYSQL_DATABASE="wordpress" -e MYSQL_USER="wpuser" -e MYSQL_PASSWORD="password" -v /etc/localtime:/etc/localtime:ro -v /opt/podman.pod/app-example/c_db/var/lib/mysql:/var/lib/mysql:Z --name=app-example-db mariadb

sudo podman run -d --restart=always --pod=app-example -e WORDPRESS_DB_NAME="wordpress" -e WORDPRESS_DB_USER="wpuser" -e WORDPRESS_DB_PASSWORD="password" -e WORDPRESS_DB_HOST="127.0.0.1" -v /etc/localtime:/etc/localtime:ro -v /opt/podman.pod/app-example/c_wp/var/www/html:/var/www/html:Z --name app-example-wp wordpress

</code></pre>

h2. create systemd-unit files

<pre><code class="shell">

cd /opt/podman.pod/app-example

sudo podman generate systemd --files --name app-example

sudo cp pod-*.service /etc/systemd/system/.

sudo cp container-*.service /etc/systemd/system/.

</code></pre>

h2. create container

see also:

https://www.redhat.com/sysadmin/wordpress-container

https://rancher.com/learning-paths/how-to-build-and-run-your-own-container-images/

https://docs.podman.io/en/latest/markdown/podman-build.1.html

create @~/container.user/wordpress.user/Dockerfile@

<pre>

FROM docker.io/rockylinux/rockylinux

MAINTAINER jke <j@keihsler.com>

RUN dnf module enable -y php:7.4

RUN yum install -y mariadb-server mariadb php php-apcu php-intl php-mbstring php-xml php-json php-mysqlnd crontabs cronie iputils net-tools;yum clean all

RUN systemctl enable mariadb

RUN systemctl enable httpd

RUN systemctl disable systemd-update-utmp.service

ENTRYPOINT ["/sbin/init"]

CMD ["/sbin/init"]

</pre>

<pre><code class="shell">

cd ~/container.user/wordpress.user/

podman build -t wordpress_user .

</code></pre>

h2. compose pod

create @~/compose.user/nextcloud.user/compose.yml@

<pre><code class="yaml">

version: '3'

services:

  db:

    image: mariadb

    container_name: nextcloud-mariadb

    networks:

      - nextcloud_network

    volumes:

      - db:/opt/nextcloud/mysql

      - /etc/localtime:/etc/localtime:ro

    environment:

      - MYSQL_ROOT_PASSWORD=XXXXX

      - MYSQL_PASSWORD=XXXXX

      - MYSQL_DATABASE=nextcloud

      - MYSQL_USER=nextcloud

    restart: unless-stopped

  app:

    image: nextcloud:latest

    container_name: nextcloud-app

    ports:

      - 9099:80

    networks:

      - nextcloud_network

    depends_on:

      - db

    volumes:

      - nextcloud:/var/www/html

      - ./app/config:/var/www/html/config

      - ./app/custom_apps:/var/www/html/custom_apps

      - ./app/data:/var/www/html/data

      - ./app/themes:/opt/nextcloud/www/html/themes

      - /etc/localtime:/etc/localtime:ro

    environment:

      - VIRTUAL_HOST=ak-i40-cloud.openfab.org

    restart: unless-stopped

volumes:

  nextcloud:

  db:

networks:

  nextcloud_network:

</code></pre>

<pre><code class="shell">

podman-compose -f ~/compose.user/nextcloud.user/compose.yml up

</code></pre>

h2. shell-access to inside container

<pre><code class="shell">

podman exec -it -u root nc_example.com-nc /bin/sh

</code></pre>

h2. administration

h3. list (dangling) images

<pre><code class="shell">

podman images

podman images -f dangling=true

</code></pre>

h3. remove dangling images

best is to make sure that all containers needed are up and running before removing dangling containers

<pre><code class="shell">

podman system prune

</code></pre>

h2. debuging

h3. get the location of the logfile of a specific container

<pre><code class="shell">

podman inspect --format='{{.HostConfig.LogConfig.Path}}' nc_example.com-nc

</code></pre>