Month: July 2022

Categories
AlmaLinux Linux Red Hat

Converting from CentOS 8 to AlmaLinux 8

This is more so that I can remember.

You need to get to the latest update level on the CentOS systems. If the systems have been unloved you will likely find that they can no longer access the repos servers.

Change the baseurl to http://vault.centos.org/, comment out the mirrorlist as per this image.

You’ll need to do this in at least :

/etc/yum.repos.d/CentOS-Linux-BaseOS.repo
/etc/yum.repos.d/CentOS-Linux-AppStream.repo

Then you can perform the required upgrade :

dnf update
dnf upgrade

Then I suggest re-booting and you can then perform the AlmaLinux migration by :

curl -O https://raw.githubusercontent.com/AlmaLinux/almalinux-deploy/master/almalinux-deploy.sh
bash almalinux-deploy.sh

Then the following should show that you’ve converted OK

cat /etc/os-release
cat /etc/os-release
NAME="AlmaLinux"
VERSION="8.6 (Sky Tiger)"
ID="almalinux"
ID_LIKE="rhel centos fedora"
VERSION_ID="8.6"
PLATFORM_ID="platform:el8"
PRETTY_NAME="AlmaLinux 8.6 (Sky Tiger)"
ANSI_COLOR="0;34"
LOGO="fedora-logo-icon"
CPE_NAME="cpe:/o:almalinux:almalinux:8::baseos"
HOME_URL="https://almalinux.org/"
DOCUMENTATION_URL="https://wiki.almalinux.org/"
BUG_REPORT_URL="https://bugs.almalinux.org/"

ALMALINUX_MANTISBT_PROJECT="AlmaLinux-8"
ALMALINUX_MANTISBT_PROJECT_VERSION="8.6"
REDHAT_SUPPORT_PRODUCT="AlmaLinux"
REDHAT_SUPPORT_PRODUCT_VERSION="8.6"
Categories
Podman

phpIPAM via podman-compose

You can use containers inside container orchestration platforms and of course you can do that with phpIPAM as well, but in my case I just wanted the convenience of the container packaging approach and running it on a single Linux host without having to worry about the overheads of K8S style platforms.

I was using a RHEL derivative, Alma Linux 9.0 in this case and also using Podman rather than Docker.

I did want to use the docker-compose approach to configuring and maintaining the application. The compose format makes it really quite simple to deploy and maintain simple container applications that are single system hosted.

Since I wasn’t using Docker, rather Podman, I found that you can use a tool called podman-compose to orchestrate podman to deliver the outcome you’d expect from a docker-compose file.

Firstly, start like this, getting podman and pip3 installed.

 yum install podman python3-pip

Then it’s simple to install podman-compose

pip3 install podman-compose

With a docker-compose.yml file similar to the following (change the default passwords i’ve put in the file) you can get going very quickly.

version: '3'

services:
  phpipam-web:
    image: docker.io/phpipam/phpipam-www:latest
    ports:
      - "80:80"
    environment:
      - TZ=Australia/Melbourne
      - IPAM_DATABASE_HOST=phpipam-mariadb
      - IPAM_DATABASE_USER=root
      - IPAM_DATABASE_PASS=<mysql_root_pass>
    restart: unless-stopped
    volumes:
      - phpipam-logo:/phpipam/css/images/logo
    depends_on:
      - phpipam-mariadb

  phpipam-mariadb:
    image: docker.io/library/mariadb:latest
    environment:
      - MARIADB_ROOT_PASSWORD=<mysql_root_pass>
    restart: unless-stopped
    volumes:
      - phpipam-db-data:/var/lib/mysql

volumes:
  phpipam-db-data:
  phpipam-logo:

Then it’s as simple as

podman-compose up -d

Then you connect to the IP address of your underlying system, and execute the installation dialogue. You should only need to enter the MySQL/MariaDB username / password, everything else should be pre-filled with the correct information.