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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$Module to configure Wireguard tunnelZubuntu wireguarda # Configure one or more WG interfaces and provide optional readinessprobes
wireguard:
interfaces:
- name: wg0
config_path: /etc/wireguard/wg0.conf
content: |
[Interface]
PrivateKey =
Address =
[Peer]
PublicKey =
Endpoint = :
AllowedIPs = , , ...
- name: wg1
config_path: /etc/wireguard/wg1.conf
content: |
[Interface]
PrivateKey =
Address =
[Peer]
PublicKey =
Endpoint = :
AllowedIPs =
readinessprobe:
- 'systemctl restart service'
- 'curl https://webhook.endpoint/example'
- 'nc -zv some-service-fqdn 443'
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aR Validate user-provided wg:interfaces option values.
This function supplements flexible jsonschema validation with specific
value checks to aid in triage of invalid user-provided configuration.
@param wg_int: Dict of configuration value under 'wg:interfaces'.
@raises: ValueError describing invalid values provided.
z, z%Missing required wg:interfaces keys: r r r z$Expected a string for wg:interfaces:z. Found z*Invalid wireguard interface configuration:N) REQUIRED_WG_INT_KEYS
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zWriting user-provided configuration into Wireguard
interface configuration file.
@param wg_int: Dict of configuration value under 'wg:interfaces'.
@raises: RuntimeError for issues writing of configuration file.
z"Configuring Wireguard interface %sr z#Writing wireguard config to file %sr r )modez-Failure writing Wireguard configuration file :N) LOGdebugr Z
write_fileWG_CONFIG_FILE_MODE Exception RuntimeErrorr r )r er$ r$ r% write_config s r/ )r cloudc C s yTt jd| d |jjdd| d t jd| d |jjdd| d W n< tjk
r } z tdt t| |W Y dd}~X nX dS ) zEnable and start Wireguard interface
@param wg_int: Dict of configuration value under 'wg:interfaces'.
@raises: RuntimeError for issues enabling WG interface.
z Enabling wg-quick@%s at bootr enablez wg-quick@z!Bringing up interface wg-quick@%sZrestartz0Failed enabling/starting Wireguard interface(s):N) r) r* distroZmanage_servicer ProcessExecutionErrorr- r r )r r0 r. r$ r$ r% enable_wg s r4 )wg_readinessprobesc C s^ g }d}x4| D ],}t |ts|jd| d| |d7 }qW |rZtdt tj| dS )zBasic validation of user-provided probes
@param wg_readinessprobes: List of readinessprobe probe(s).
@raises: ValueError of wrong datatype provided for probes.
r z(Expected a string for readinessprobe at z. Found z Invalid readinessProbe commands:N)r r r r r r )r5 r! poscr$ r$ r% !readinessprobe_command_validation s
r9 c C s g }xj| D ]b}y$t jdt| tj|ddd W q
tjk
rj } z|j| d| W Y dd}~X q
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W |rtdt tj| dS )zExecute provided readiness probe(s)
@param wg_readinessprobes: List of readinessprobe probe(s).
@raises: ProcessExecutionError for issues during execution of probes.
z Running readinessprobe: '%s'T)captureshellz: Nz&Failed running readinessprobe command:) r) r* r r r3 r r- r r )r5 r! r8 r. r$ r$ r% readinessprobe s
*r< )r0 c C s dg}t jdrdS tj tk r*|jd y| jj W n" tk
rZ tj t
d Y nX y| jj | W n" tk
r tj t
d Y nX dS )zInstall 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_versionMIN_KERNEL_VERSIONr r2 Zupdate_package_sourcesr, logexcr) Zinstall_packages)r0 Zpackagesr$ r$ r% maybe_install_wireguard_packages s
r? c C s y@t j dddd} tjd| jj s>tjd t j dddd W n@ t jk
r } z"tj tdt
t | W Y dd}~X nX dS ) zYLoad wireguard kernel module
@raises: ProcessExecutionError for issues modprobe
ZlsmodT)r: r; r
z Loading wireguard kernel modulezmodprobe wireguardz Could not load wireguard module:N) r researchstdoutstripr) r* r3 r r> r r )outr. r$ r$ r% load_wireguard_kernel_module s
rE )r cfgr0 argsreturnc C s d }d|kr t jd |d }nt jd| d S t| t x*|d D ] }t| t| t|| qHW d|kr|d d k r|d }t| t| n
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z!Found Wireguard section in configz sB