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MetaSchema� get_meta_doc)� PER_INSTANCEaI Wireguard module provides a dynamic interface for configuring
Wireguard (as a peer or server) in an easy way.
This module takes care of:
- writing interface configuration files
- enabling and starting interfaces
- installing wireguard-tools package
- loading wireguard kernel module
- executing readiness probes
What's a readiness probe?
The idea behind readiness probes is to ensure Wireguard connectivity
before continuing the cloud-init process. This could be useful if you
need access to specific services like an internal APT Repository Server
(e.g Landscape) to install/update packages.
Example:
An edge device can't access the internet but uses cloud-init modules which
will install packages (e.g landscape, packages, ubuntu_advantage). Those
modules will fail due to missing internet connection. The "wireguard" module
fixes that problem as it waits until all readinessprobes (which can be
arbitrary commands - e.g. checking if a proxy server is reachable over
Wireguard network) are finished before continuing the cloud-init
"config" stage.
.. note::
In order to use DNS with Wireguard you have to install ``resolvconf``
package or symlink it to systemd's ``resolvectl``, otherwise ``wg-quick``
commands will throw an error message that executable ``resolvconf`` is
missing which leads wireguard module to fail.
Z cc_wireguardz$Module to configure Wireguard tunnelZubuntu� wireguarda� # Configure one or more WG interfaces and provide optional readinessprobes
wireguard:
interfaces:
- name: wg0
config_path: /etc/wireguard/wg0.conf
content: |
[Interface]
PrivateKey = <private_key>
Address = <address>
[Peer]
PublicKey = <public_key>
Endpoint = <endpoint_ip>:<endpoint_ip_port>
AllowedIPs = <allowedip1>, <allowedip2>, ...
- name: wg1
config_path: /etc/wireguard/wg1.conf
content: |
[Interface]
PrivateKey = <private_key>
Address = <address>
[Peer]
PublicKey = <public_key>
Endpoint = <endpoint_ip>:<endpoint_ip_port>
AllowedIPs = <allowedip1>
readinessprobe:
- 'systemctl restart service'
- 'curl https://webhook.endpoint/example'
- 'nc -zv some-service-fqdn 443'
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aR Validate user-provided wg:interfaces option values.
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@raises: ValueError describing invalid values provided.
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@param wg_int: Dict of configuration value under 'wg:interfaces'.
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@param wg_readinessprobes: List of readinessprobe probe(s).
@raises: ValueError of wrong datatype provided for probes.
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rh } z|�|� d|� �� W 5 d}~X Y qX q|r�tdt� t�|�� ���dS )z�Execute provided readiness probe(s)
@param wg_readinessprobes: List of readinessprobe probe(s).
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z Running readinessprobe: '%s'T�Zcapture�shellz: Nz&Failed running readinessprobe command:) r, r- r! r r6 r r0 r# r )r8 r$ r; r1 r' r' r( �readinessprobe� s (�r? )r3 c C s� dg}t �d�rdS t�� tk r*|�d� z| j�� W n" tk
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d� � Y nX dS )z�Install wireguard packages and tools
@param cloud: Cloud object
@raises: Exception for issues during package
installation.
zwireguard-toolsZwgNr zPackage update failedz!Failed to install wireguard-tools) r Zwhichr Zkernel_version�MIN_KERNEL_VERSIONr r5 Zupdate_package_sourcesr/ �logexcr, Zinstall_packages)r3 Zpackagesr' r' r( � maybe_install_wireguard_packages� s
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@raises: ProcessExecutionError for issues modprobe
ZlsmodTr= r z Loading wireguard kernel modulezmodprobe wireguardz Could not load wireguard module:N) r �re�search�stdout�stripr, r- r6 r rA r# r! )�outr1 r' r' r( � load_wireguard_kernel_module� s
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