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o o@�d � @ s U d Z ddlZddlZddlmZ ddlmZ ddlmZ ddlm Z m Z ddl m Z ddlmZ dd lmZmZ dd lmZ dd lmZ e �e�Zd Zd ddeegeed�ed�gg d�Zee d< ee�Z d dd�Z d dd�Z de dede de d df d d �Z!dS ) z%Seed Random: Provide random seed data� N)�BytesIO)�dedent)�log)�subp�util)�Cloud)�Config)� MetaSchema� get_meta_doc)� ALL_DISTROS)� PER_INSTANCEaP All cloud instances started from the same image will produce very similar data when they are first booted as they are all starting with the same seed for the kernel's entropy keyring. To avoid this, random seed data can be provided to the instance either as a string or by specifying a command to run to generate the data. Configuration for this module is under the ``random_seed`` config key. If the cloud provides its own random seed data, it will be appended to ``data`` before it is written to ``file``. If the ``command`` key is specified, the given command will be executed. This will happen after ``file`` has been populated. That command's environment will contain the value of the ``file`` key as ``RANDOM_SEED_FILE``. If a command is specified that cannot be run, no error will be reported unless ``command_required`` is set to true. �cc_seed_randomz Seed RandomzProvide random seed dataz� random_seed: file: /dev/urandom data: my random string encoding: raw command: ['sh', '-c', 'dd if=/dev/urandom of=$RANDOM_SEED_FILE'] command_required: true a_ # To use 'pollinate' to gather data from a remote entropy # server and write it to '/dev/urandom', the following # could be used: random_seed: file: /dev/urandom command: ["pollinate", "--server=http://local.polinate.server"] command_required: true )�id�name�title� description�distros� frequency�examples�activate_by_schema_keys�metac C s` | sdS |r |� � dv rt�| �S |� � dv r t�| �S |� � dv r*tj| dd d�S td| ��)N� )�raw)�base64�b64)�gzip�gzF)�quiet�decodez Unknown random_seed encoding: %s)�lowerr � encode_textr � b64decode� decomp_gzip�IOError)�data�encoding� r& �A/usr/lib/python3/dist-packages/cloudinit/config/cc_seed_random.py�_decodeP s r( c C sl | s|rt d��| st�d� d S | d }t�|�s,|r$t dj|d���t�d|� d S tj| |dd� d S ) Nz"no command found but required=truezno command providedr z+command '{cmd}' not found but required=true)�cmdz'command '%s' not found for seed_commandF)�env�capture)� ValueError�LOG�debugr �which�format)�command�requiredr* r) r& r& r' �handle_random_seed_command] s � r3 r �cfg�cloud�args�returnc C s |� di �}|� dd�}|� dd�}t� }|r#|�t||� d�d�� |jj}|r7d|v r7|�t�|d �� |�� }t |�rOt � d| t |�|� t� ||� |� d d �} |� d d �} zt j�� } || d < t| | | d � W d S ty� } z t �d| | � | �d } ~ ww )N� random_seed�filez /dev/urandomr$ r r% )r% z0%s: adding %s bytes of random seed entropy to %sr1 �command_requiredF�RANDOM_SEED_FILE)r1 r2 r* z'handling random command [%s] failed: %s)�getr �writer( � datasource�metadatar r �getvalue�lenr- r. � append_file�os�environ�copyr3 r, �warning) r r4 r5 r6 �mycfg� seed_path� seed_data�seed_bufr? r1 �reqr* �er& r& r' �handlep s: � ��rM )N)"�__doc__r rC �ior �textwrapr � cloudinitr �loggingr r �cloudinit.cloudr �cloudinit.configr �cloudinit.config.schemar r �cloudinit.distrosr �cloudinit.settingsr � getLogger�__name__r- �MODULE_DESCRIPTIONr �__annotations__r( r3 �str�listrM r& r& r& r' �<module> sB � ���! "
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