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Linux server role

Role that install a generic setup for a Debian linux:

  • Docker
  • Monitoring with prometheus (node exporter + cAdvisor)
  • Kernel parameters
  • Basic tools and packages
  • Import of ssh keys and gpg keys from github

Example playbook

This is an example playbook

- hosts: all
  vars:
    hostname: "template"
    domain: "strm.sh"
    network:
      ip: "192.168.0.9"
      cidr: "/24"
      gateway: "192.168.0.1"
      dns:
      - "8.8.8.8"
      - "1.1.1.1"
      extra_ips:
      - "192.168.0.2"
      - "192.168.0.3"
      - "192.168.0.4"
      extra_raw: |-
        iface tun0 inet static
          address 10.0.0.8/24
    static_hosts: "{{ lookup('file', 'hosts') }}"
    loki:
      url: 'http://loki.strm.sh:3100/loki/api/v1/push'
    github_user: opsxcq
  tasks:
  - debug:
      msg: "Your other tasks here"
  roles:
    - ../..

Optional variables:

  • network.cidr: default value is /24.
  • static_hosts: if not present, won't change /etc/hosts.
  • loki: When defined will configure the system and container logs to be shipped to loki.

Requirements file

- src: git+https://github.com/opsxcq/ansible-role-linux-server.git
  name: "opsxcq.linux_server"

Tmux configuration

Tmux is added to this setup, but with a difference that it uses Ctrl+A, so you can keep a tmux session (using Ctrl+B) locally connected to a tmux remotely.

Monitoring

Alongside the monitoring tools like prometheus, there are some tools which help you to monitor the resource usage locally.

  • htop
  • iostat -x 1 - shows real time io data
  • slurm -i ens192 - shows real time network stats for the interface ens192

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  • Shell 59.1%
  • Jinja 40.9%