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https://github.com/evrardjp/ansible-tinc
Role to install tinc in a star/ring topology (w/ leaf/spine) (based on your variables)
https://github.com/evrardjp/ansible-tinc
ansible centos debian molecule openwrt tinc ubuntu vpn
Last synced: 2 months ago
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Role to install tinc in a star/ring topology (w/ leaf/spine) (based on your variables)
- Host: GitHub
- URL: https://github.com/evrardjp/ansible-tinc
- Owner: evrardjp
- License: apache-2.0
- Created: 2016-12-11T14:42:51.000Z (about 8 years ago)
- Default Branch: main
- Last Pushed: 2021-04-16T11:21:14.000Z (over 3 years ago)
- Last Synced: 2024-08-01T03:14:00.776Z (4 months ago)
- Topics: ansible, centos, debian, molecule, openwrt, tinc, ubuntu, vpn
- Language: Jinja
- Homepage:
- Size: 76.2 KB
- Stars: 16
- Watchers: 4
- Forks: 11
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
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- stars - evrardjp/ansible-tinc
README
# Tinc
This role installs tinc in a star or a ring topology.
The nodes listed in the group [tinc_nodes] is a full list of nodes to apply/install the role.
The nodes part of [tinc_spine_nodes] are the "core" nodes, where all the nodes connect.
The nodes in [tinc_leaf_nodes] connect only to the spine nodes. Devices behind a NAT would be an example of such.
If all the [tinc_nodes] are part of the [tinc_spine_nodes], you have a more "ringy" topology. If you have one node in [tinc_spine_nodes], you have a more "starry" topology.
## Requirements
* Ubuntu 18.04 / CentOS 7 (or above) / OpenWRT
* On CentOS and above, EPEL repo needs to be configured in advance.
To do so, you can run the following:
```bash
yum install epel-release || dnf install epel-release
yum update || dnf update
```
## Role Variables
* tinc_key_size: The size of the generated keys (Default: `4096`)
* tinc_address_family can be ipv4/ipv6/any (or undefined)
* tinc_mode can be router, switch, or hub. (See https://www.tinc-vpn.org/documentation/tinc.conf.5). (Default: `router`)
* tinc_netname: The tinc network name
* tinc_vpn_ip: The ip to assign to a single VPN endpoint. Use host vars to set it.
* tinc_vpn_cidr: The cidr used in tinc network (Default: `/24`, or force /32 in router mode).
* tinc_vpn_interface: The device for tinc to use, in case there are multiple tun devices (Default: `tun0`)
* tinc_control_plane_bind_ip: The ip for tincd service to bind to (Default: `ansible_default_ipv4.address` }} )
Inventory must set tinc_control_plane_bind_ip (for core) and/or tinc_vpn_ip (for core and edge nodes).
Please have a look in the task files.
## Examples
### Router mode, ring topology
(Short) Inventory:
```
[tinc_nodes:children]
tinc_spine_nodes
tinc_leaf_nodes
[tinc_spine_nodes]
node1 tinc_vpn_ip=10.10.0.11
node2 tinc_vpn_ip=10.10.0.12
node3 tinc_vpn_ip=10.10.0.13
[tinc_leaf_nodes]
node1
node2
node3
```
### Router mode, star topology
(Detailed) Inventory:
```
[tinc_nodes]
node1
node2
node3
[tinc_spine_nodes]
node1
[tinc_leaf_nodes]
node1
node2
node3
```
Group vars for `tinc_nodes`:
```
tinc_netname: mynetname
tinc_vpn_interface: tun0
```
Host vars for spine node, `node1`:
```
tinc_control_plane_bind_ip: "{{ ansible_eth0.ipv4.address | default(ansible_default_ipv4.address) }}"
tinc_vpn_ip: 10.10.0.10
```
Host vars for edge node, `node2`:
```
tinc_vpn_ip: 10.10.0.11
```
Host vars for edge node, `node3`:
```
tinc_vpn_ip: 10.10.0.12
```
## Dependencies
None
## Example Playbook
See https://raw.githubusercontent.com/evrardjp/ansible-tinc/master/molecule/default/converge.yml
Don't forget to set the necessary variables in your inventory (see above).
## Testing
Tests are based on Ansible Molecule framework which:
- checks role syntax
- starts several containers with different OS (only for tests. We don't mix Tinc versions in production)
- applies this role to each container
- runs idempotency tests (make sure that second run will not make unexpected changes)
- verifies that each prepared node able to ping other nodes over VPN
Tests run in a github actions on PR and daily. Additionally you may execute them on local machine.
Dependencies you need to have installed for running the tests:
- Ansible
- [Docker](https://docs.docker.com/engine/install/)
- [Molecule](https://molecule.readthedocs.io/en/latest/installation.html) with `molecule-docker` driver, or tox.
### Run tests manually, using molecule directly
You can existing tests for star and ring topologies:
```bash
cd ansible-tinc
molecule test # this run default tests for Ring scenario
molecule test -s star
```
The 'molecule test' command execute full scenario: 'create', 'converge', 'check idempotency', 'verify' and 'destroy' steps. Often you don't want to have container immediately destroyed and need access it for debug. For this might be useful replace 'molecule test' with:
```bash
molecule converge # this create containers and apply the role
molecule verify # run tests described in molecule/default/verify.yml
# after both steps you have live Docker containers
# you can access them with usual commands 'docker ps', 'docker exec' etc
molecule destroy
```
### Run tests manually, using tox
tox is a test runner for python. It will install all the necessary python dependencies (ansible, molecule[docker]) in a virtual environment.
To run a test:
```bash
tox -e ansible--
```
See supported values for `version` in `tox.ini`.
Current testable scenarios for tinc are `ring`, or `star`.
Positional arguments will be passed to the `molecule test` command.
For example, to run a test for ansible-2.9, with the ring topology and prevent molecule to destroy the environment:
```bash
tox -e ansible-2.9-ring -- --destroy=never
```
## How to test role with new OS
add new image to [molecule/default/molecule.yml](molecule/default/molecule.yml) and [molecule/star/molecule.yml](molecule/star/molecule.yml) following existing examples. Files are similar except the variables `scenario.name` and `groups`. Next hightlights could be hepful:
- code `privileged: true` with `command: /sbin/init` enable systemd if container support it. Please don't forget that privileged containers in your system could be a risk.
- Docker images lack some standard software, so [molecule/default/converge.yml](molecule/default/converge.yml) take care about installing necessary dependencies
- according with https://github.com/ansible-community/molecule/issues/959 Docker doesn't allow modify /etc/hosts in a container. To workaround this we skipping one step with `molecule-notest` tag in [tasks/tinc_configure.yml](tasks/tinc_configure.yml) and modifying /etc/hosts during container creation - following the corresponding directives in [molecule/default/molecule.yml](molecule/default/molecule.yml)
## License
Apache2
## Author Information
Jean-Philippe Evrard