2026 compatibility fixes

[cdelbrug]

Summary

This updates the original 2021-era NetOps Quickstart lab so it can run reliably on an Ubuntu Server 20.04 VM with current Docker Engine tooling and pinned legacy-compatible application images.

Major fixes

• Pinned GitLab CE to gitlab/gitlab-ce:13.12.15-ce.0
• Pinned GitLab Runner to gitlab/gitlab-runner:ubuntu-v13.12.0
• Replaced removed docker.io/bitnami/consul:1-debian-10 image with hashicorp/consul:1.9.5
• Pinned Batfish to batfish/allinone:2021.04.12.882
• Pinned Grafana to grafana/grafana:7.5.7
• Pinned Loki and Promtail to 2.2.1
• Pinned Arista eAPI exporter dependencies and changed base image to python:3.8-slim
• Pinned Ansible Galaxy collections compatible with Ansible 2.10
• Replaced unavailable Jinja ipaddr filter usage
• Fixed inventory host definitions with proper YAML host keys
• Unlocked the disposable Alpine lab user for SSH access
• Changed the host ping test from Ansible shell to raw
• Updated .gitignore for generated/runtime files and licensed cEOS image
• Added README documentation for compatibility changes

Tested environment

• Ubuntu Server 20.04 VM
• VMware Workstation
• Docker Engine with legacy docker-compose
• Arista cEOS lab image
• GitLab Runner 13.12
• Ansible 2.10-era automation stack

Notes

This remains a demo/lab environment and should not be used in production.