Add Ubuntu 24.04 (Noble) support

Add support for Ubuntu 24.04 LTS (Noble) to the charm while maintaining backward compatibility with Ubuntu 22.04 (Jammy).

Summary of changes:

Add Noble base configuration to charmcraft.yaml with multi-architecture support (amd64, s390x, ppc64el, arm64)
Add ‘noble’ series to metadata.yaml
Update osci.yaml CI configuration:
- Add charm-unit-jobs-py312 template for Python 3.12
- Add openstack-loadbalancer-noble job definition
- Upgrade charmcraft channel from 2.0/stable to 3.x/stable
Add complete Noble test bundle configuration
Refactor overlay templates to use shared local_overlay.yaml.j2 to eliminate code duplication between Ubuntu versions

This change enables the charm to run on both Ubuntu 22.04 and 24.04 systems, with Noble becoming the primary test target while maintaining Jammy compatibility for existing deployments.

Change-Id: I210e00cb43ad93b2e410ebe1cbefa4d9159a49d2 Signed-off-by: Felipe Reyes felipe.reyes@canonical.com

Overview

The openstack-loadbalancer charm deploys a loadbalancer that can load balance traffic over a number of units of a service. The charm supports using vips accross the loadbalancer units to provide HA.

Usage

Configuration

This section covers common and/or important configuration options. See file config.yaml for the full list of options, along with their descriptions and default values. See the Juju documentation for details on configuring applications.

`vips`

Sets the VIPs to use on the openstack-loadbalancer units to provide fault tolerant access to a servce. The value should be a space seperated list of IPs.

Deployment

The charm has public, admin and internal space bindings. These are the spaces that the charm will create listeners on for ingress traffic. The charm vips option should be used to provice an IP on each one of these network spaces.

This charm needs to be related to the hacluster charm to manage vips and the haproxy service.

juju deploy -n 3 openstack-loadbalancer
juju config openstack-loadbalancer vip="10.0.0.100 10.10.0.100 10.20.0.100"
juju deploy hacluster openstack-loadbalancer-hacluster
juju relate openstack-loadbalancer:ha openstack-loadbalancer-hacluster:ha

To provide a load balancer relate the charm to a service that supports the loadbalancer interface.

juju add-relation openstack-loadbalancer:loadbalancer ceph-dashboard:loadbalancer

Documentation

The OpenStack Charms project maintains two documentation guides:

OpenStack Charm Guide: for project information, including development and support notes
OpenStack Charms Deployment Guide: for charm usage information

Bugs

Please report bugs on Launchpad.