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galera-swarm-lxc-ansible
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Galera cluster deployment based on docker swarm using Linux Containers (LXC) with automatic deployment via Ansible.
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galera-swarm-lxc-ansible/README.md

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In this virtual lab we used mainly the following tools:

  • Docker swarm for service creation and container orchestration
  • Linux Containers (LXC) for swarm worker nodes
  • Ansible for automatic deployment
  • Galera-inside-docker for MariaDB clustering

As an operating system we used the same for all docker nodes (Host machine & LXC containers):

  • Debian 9.3 (Stretch) with Linux Kernel 4.9.0-5-amd64

In more detail, the manager node is running on the host machine itself, while the provisioning of LXC containers permits the creation of multiple worker nodes on which the galera cluster runs, running on the same host without the need for separate worker machines.

Ansible is used for the total automation of the deployment process, which is constituted after by the usage of Makefile, in the specific case of the combination of LXC with Docker swarm and Galera cluster, provided that all the necessary modules are available with the latest version of ansible which is installed automatically by make.