­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ 3 \me$ @s6UdZddlZddlZddlmZddlmZmZddlm Z ddl m Z ddl m Z mZddlmZed Zd dd ed ged gedgdZe eeZejeZedddgZdZdZd,ZedddZedddZee dddZedd d!Z edd"d#Z!e d$d%d&Z"d'd(Z#e$e e edd)d*d+Z%dS)-Z WireguardN)dedent)subputil)Cloud)Config) MetaSchema get_meta_doc) PER_INSTANCEaIWireguard 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$Module to configure Wireguard tunnelZubuntu wireguarda # Configure one or more WG interfaces and provide optional readinessprobes wireguard: interfaces: - name: wg0 config_path: /etc/wireguard/wg0.conf content: | [Interface] PrivateKey = Address =
[Peer] PublicKey = Endpoint = : AllowedIPs = , , ... - name: wg1 config_path: /etc/wireguard/wg1.conf content: | [Interface] PrivateKey = Address =
[Peer] PublicKey = Endpoint = : AllowedIPs = readinessprobe: - 'systemctl restart service' - 'curl https://webhook.endpoint/example' - 'nc -zv some-service-fqdn 443' )idnametitle descriptionZdistrosZ frequencyZactivate_by_schema_keysZexamplesr config_pathcontenti )wg_intcCsg}tjt|j}|r8djt|}|jd|xPt|jD]@\}}|dksf|dksf|dkrFt|t sF|jd|d|qFW|rt dt t j|d S) aRValidate user-provided wg:interfaces option values. This function supplements flexible jsonschema validation with specific value checks to aid in triage of invalid user-provided configuration. @param wg_int: Dict of configuration value under 'wg:interfaces'. @raises: ValueError describing invalid values provided. z, z%Missing required wg:interfaces keys: r rrz$Expected a string for wg:interfaces:z. Found z*Invalid wireguard interface configuration:N) REQUIRED_WG_INT_KEYS differencesetkeysjoinsortedappenditems isinstancestr ValueErrorNL)rerrorsZmissingrkeyvaluer$"/usr/lib/python3.6/cc_wireguard.pysupplemental_schema_validationhs  r&cCstjd|dy,tjd|dtj|d|dtdWnDtk r}z(td|ddtt||WYd d }~XnXd S) zWriting user-provided configuration into Wireguard interface configuration file. @param wg_int: Dict of configuration value under 'wg:interfaces'. @raises: RuntimeError for issues writing of configuration file. z"Configuring Wireguard interface %sr z#Writing wireguard config to file %srr)modez-Failure writing Wireguard configuration file :N) LOGdebugrZ write_fileWG_CONFIG_FILE_MODE Exception RuntimeErrorr r)rer$r$r% write_configsr/)rcloudcCsyTtjd|d|jjdd|dtjd|d|jjdd|dWn<tjk r}ztdtt||WYdd}~XnXdS) zEnable and start Wireguard interface @param wg_int: Dict of configuration value under 'wg:interfaces'. @raises: RuntimeError for issues enabling WG interface. zEnabling wg-quick@%s at bootr enablez wg-quick@z!Bringing up interface wg-quick@%sZrestartz0Failed enabling/starting Wireguard interface(s):N) r)r*distroZmanage_servicerProcessExecutionErrorr-r r)rr0r.r$r$r% enable_wgsr4)wg_readinessprobescCs^g}d}x4|D],}t|ts|jd|d||d7}qW|rZtdttj|dS)zBasic validation of user-provided probes @param wg_readinessprobes: List of readinessprobe probe(s). @raises: ValueError of wrong datatype provided for probes. rz(Expected a string for readinessprobe at z. Found z Invalid readinessProbe commands:N)rrrrr r)r5r!poscr$r$r%!readinessprobe_command_validations   r9cCsg}xj|D]b}y$tjdt|tj|dddWq tjk rj}z|j|d|WYdd}~Xq Xq W|rtdttj|dS)zExecute provided readiness probe(s) @param wg_readinessprobes: List of readinessprobe probe(s). @raises: ProcessExecutionError for issues during execution of probes. zRunning readinessprobe: '%s'T)captureshellz: Nz&Failed running readinessprobe command:) r)r*rrr3rr-r r)r5r!r8r.r$r$r%readinessprobes *r<)r0cCsdg}tjdrdStjtkr*|jdy|jjWn"tk rZtj t dYnXy|jj |Wn"tk rtj t dYnXdS)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) rZwhichrZkernel_versionMIN_KERNEL_VERSIONrr2Zupdate_package_sourcesr,logexcr)Zinstall_packages)r0Zpackagesr$r$r% maybe_install_wireguard_packagess      r?cCsy@tjdddd}tjd|jjs>tjdtjddddWn@tjk r}z"tj tdt t |WYdd}~XnXdS) zYLoad wireguard kernel module @raises: ProcessExecutionError for issues modprobe ZlsmodT)r:r;r zLoading wireguard kernel modulezmodprobe wireguardz Could not load wireguard module:N) rresearchstdoutstripr)r*r3rr>r r)outr.r$r$r%load_wireguard_kernel_modules rE)r cfgr0argsreturncCsd}d|kr tjd|d}ntjd|dSt|tx*|dD]}t|t|t||qHWd|kr|ddk r|d}t|t|n tjddS)Nr z!Found Wireguard section in configzsB