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d+d,Z'dS )-	Wireguard    N)dedent)log)subputil)Cloud)Config)
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.
cc_wireguardz$Module to configure Wireguard tunnelubuntu	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'
    )idnametitledescriptiondistros	frequencyactivate_by_schema_keysexamplesmeta)r   config_pathcontenti  
)      wg_intc                 C   s   g }t t|  }|rdt|}|d|  t|  D ] \}}|dks2|dks2|dkrBt|t	sB|d| d|  q"|rQt
dt t| d	S )
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:. Found z*Invalid wireguard interface configuration:N)REQUIRED_WG_INT_KEYS
differencesetkeysjoinsortedappenditems
isinstancestr
ValueErrorNL)r   errorsmissingr"   keyvalue r/   ?/usr/lib/python3/dist-packages/cloudinit/config/cc_wireguard.pysupplemental_schema_validationh   s"   

r1   c              
   C   sz   t d| d  zt d| d  tj| d | d td W d	S  ty< } ztd| d  dt t| |d	}~ww )
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)	LOGdebugr   
write_fileWG_CONFIG_FILE_MODE	ExceptionRuntimeErrorr*   r(   )r   er/   r/   r0   write_config   s(   r;   cloudc              
   C   s   z+t d| d  |jdd| d   t d| d  |jdd| d   W dS  tjyD } ztdt t| |d}~ww )	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@%srestartz0Failed enabling/starting Wireguard interface(s):N)	r4   r5   distromanage_servicer   ProcessExecutionErrorr9   r*   r(   )r   r<   r:   r/   r/   r0   	enable_wg   s   rB   wg_readinessprobesc                 C   sZ   g }d}| D ]}t |ts|d| d|  |d7 }q|r+tdt t| dS )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 r      z Invalid readinessProbe commands:N)r'   r(   r%   r)   r*   r#   )rC   r+   poscr/   r/   r0   !readinessprobe_command_validation   s   
rG   c                 C   s   g }| D ]1}zt dt| tj|ddd W q tjy5 } z|| d|  W Y d}~qd}~ww |rDtdt t| dS )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captureshellz: Nz&Failed running readinessprobe command:)	r4   r5   r(   r   rA   r%   r9   r*   r#   )rC   r+   rF   r:   r/   r/   r0   readinessprobe   s    rK   c                 C   s   dg}t dr
dS t tk r|d z| j  W n ty*   t	t
d  w z	| j| W dS  tyB   t	t
d  w )zInstall wireguard packages and tools

    @param cloud: Cloud object

    @raises: Exception for issues during package
    installation.
    zwireguard-toolswgNr   zPackage update failedz!Failed to install wireguard-tools)r   whichr   kernel_versionMIN_KERNEL_VERSIONr%   r?   update_package_sourcesr8   logexcr4   install_packages)r<   packagesr/   r/   r0    maybe_install_wireguard_packages   s"   	

rT   c               
   C   s   z$t j dddd} td| j s"td t j dddd W dS W dS  t jy? } zt	tdt
 t|   d}~ww )	zYLoad wireguard kernel module

    @raises: ProcessExecutionError for issues modprobe
    lsmodTrH   r   zLoading wireguard kernel modulezmodprobe wireguardz Could not load wireguard module:N)r   researchstdoutstripr4   r5   rA   r   rQ   r*   r(   )outr:   r/   r/   r0   load_wireguard_kernel_module   s   
r[   r   cfgargsreturnc                 C   s   d }d|v rt d |d }nt d|  d S t| t  |d D ]}t| t| t|| q#d|v rK|d d urK|d }t| t| d S t d d S )Nr   z!Found Wireguard section in configz<Skipping module named %s, no 'wireguard' configuration found
interfacesrK   z+Skipping readinessprobe - no checks defined)	r4   r5   rT   r[   r1   r;   rB   rG   rK   )r   r\   r<   r]   
wg_sectionr   rC   r/   r/   r0   handle  s*   

ra   )(__doc__rV   textwrapr   	cloudinitr   loggingr   r   cloudinit.cloudr   cloudinit.configr   cloudinit.config.schemar	   r
   cloudinit.settingsr   MODULE_DESCRIPTIONr   __annotations__	getLogger__name__r4   	frozensetr   r7   r*   rO   dictr1   r;   rB   listrG   rK   rT   r[   r(   ra   r/   r/   r/   r0   <module>   sL   $+
"