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Podman » Historie » Revision 9

Revision 8 (Jeremias Keihsler, 20.04.2023 10:03) → Revision 9/12 (Jeremias Keihsler, 20.07.2023 08:38)

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 &lt;j@keihsler.com&gt; 
 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>