As of Ansible version 2.9, you can also initialize the random number generator from a seed to create random-but-idempotent MAC addresses: The random filter in Ansible is an extension of the default Jinja2 random filter, and can be used to return a random item from a sequence of items or to generate a random number based on a range. Here we mentioned in the regexp parameter as ^devops. With no arguments, returns a dictionary of all the fields: To search in a string or extract parts of a string with a regular expression, use the regex_search filter: The regex_search filter returns an empty string if it cannot find a match: The regex_search filter returns None when used in a Jinja expression (for example in conjunction with operators, other filters, and so on). Extracting part of the string using Ansible regex_search and save the output as a variable, The open-source game engine youve been waiting for: Godot (Ep. Not the answer you're looking for? Jordan's line about intimate parties in The Great Gatsby? Ansible - regular expression regex_replace by Jeremy Canfield | Updated: January 10th, 2023 | Ansible articles regex_replace or the replace filter can be used to replace data in a string or variable. It only takes a minute to sign up. However, we recommend you use the FQCN for easy linking to the See the two examples below. plugin name Are there conventions to indicate a new item in a list? Save my name, email, and website in this browser for the next time I comment. Check out my REGEX COOKBOOK article about the most commonly used (and most wanted) regex , Regular expressions (regex or regexp) are extremely useful in extracting information from any text by searching for one or more matches of a specific search pattern (i.e. Required fields are marked *. Connect and share knowledge within a single location that is structured and easy to search. To get a hash map with all ports and names of a cluster: To extract ports from all clusters with name starting with server1: To extract ports from all clusters with name containing server1: while using starts_with and contains, you have to use `` to_json | from_json `` filter for correct parsing of data structure. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The first capturing group extracts the first part of the URL until the first dot, the whole regex captures the whole URL. This describes keyword parameters of the filter. {name: "domain.server[?starts_with(name,'server1')].port", "domain.server[?contains(name,'server1')].port", "^(?P\\d+)\\s+(?P\\w+)\\s+(?Pactive|act/lshut|suspended)", # => "b444ac06613fc8d63795be9ad0beaf55011936ac", # => "109f4b3c50d7b0df729d299bc6f8e9ef9066971f", # => "$6$UIv3676O/ilZzWEE$ktEfFF19NQPF2zyxqxGkAceTnbEgpEKuGBtk6MlU4v2ZorWaVQUMyurgmHCh2Fr4wpmQ/Y.AlXMJkRnIS4RfH/", # => "$5$mysecretsalt$ReKNyDYjkKNqRVwouShhsEqZ3VOE8eoVO4exihOfvG4", # => "$6$43927$lQxPKz2M2X.NWO.gK.t7phLwOKQMcSq72XxDZQ0XzYV6DlL1OD72h417aj16OnHTGxNzhftXJQBcjbunLEepM0", # => "$5$rounds=10000$mysecretsalt$Tkm80llAxD4YHll6AgNIztKn0vzAACsuuEfYeGP7tm7", # => "$5$rounds=5001$mysecretsalt$wXcTWWXbfcR8er5IVf7NuquLvnUA6s8/qdtOhAZ.xN. The spec file should be valid formatted YAML. If you are unsure of the underlying Python type of a variable, you can use the type_debug filter to display it. With ansible lineinfile module we can remove existed lines from the file and we can replace the lines. through it, returning JSON output. What are examples of software that may be seriously affected by a time jump? Q2.) It defines how to parse the CLI that means the line started with docker has to modify with the line hello devops in the file. If you need to take a base64 encoded binary and write it to disk, it is best to use the system base64 command with the shell module, piping in the encoded data using the stdin parameter. For example, a variable that is lower in the list will override a variable that is higher up. 0. If you configure Ansible to ignore undefined variables, you may want to define some values as mandatory. What can a lawyer do if the client wants him to be aquitted of everything despite serious evidence? Truce of the burning tree -- how realistic? rev2023.3.1.43269. GitHub Instantly share code, notes, and snippets. For example, the vlan_id in the spec file is a user defined name and its value vlan-id is the If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? Copyright Ansible project contributors. However, we recommend you use the FQCN for easy linking to the To select a single element or a data subset from a complex data structure in JSON format (for example, Ansible facts), use the json_query filter. The number of distinct words in a sentence. Copyright Ansible project contributors. Is a boolean, default to False. To create a namespaced UUIDv5 using the default Ansible namespace 361E6D51-FAEC-444A-9079-341386DA8E2E: To make use of one attribute from each item in a list of complex variables, use the Jinja2 map filter: To get a date object from a string use the to_datetime filter: For a full list of format codes for working with python date format strings, see the python datetime documentation. Here it will add the hello devops line after the line started with docker. Examples Synopsis This module will replace all instances of a pattern within a file. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Below is an example of a valid spec file that my play looks like: - name: Get version set_fact: version: "{{ show_version.stdout | regex_search('Software Version. How can I save in Ansible variable the output from a bash command? Regular expression string that defines the match. Copyright Ansible project contributors. Elements of arrays in the left hash that are also in the corresponding array of the right hash will be removed (rp stands for remove present). In the all above examples we discussed about the line started with, since i mentioned the symbol(^). Regular expression string that defines the match. To escape special characters within a standard Python regex, use the regex_escape filter (using the default re_type='python' option): To escape special characters within a POSIX basic regex, use the regex_escape filter with the re_type='posix_basic' option: To get the last name of a file path, like foo.txt out of /etc/asdf/foo.txt: To get the last name of a windows style file path (new in version 2.0): To separate the windows drive letter from the rest of a file path (new in version 2.0): To get the rest of the path without the drive letter: To get the directory from a windows path (new version 2.0): To expand a path containing a tilde (~) character (new in version 1.5): To expand a path containing environment variables: expandvars expands local variables; using it on remote paths can lead to errors. Vladimir to the rescue as always. Here is the example playbook with the regular expression pattern . To learn more, see our tips on writing great answers. For example ^(. Ansible Map Filter does two things String with substitution (or original if no match). Thanks for contributing an answer to Server Fault! Ansible playbook - does include_role and delegate_to work together. To avoid this problem you should mention backref as yes. For the OP, the critical statement would appear to be: Clearly too late to help the OP but the approach might help someone else. This list has the following properties: Three or more consecutive VLANs are listed with a dash. If you use it with a non listable item, the filter does nothing. 4 Answers Sorted by: 6 Not the most beautiful thing but this works: - item.key | regex_search ('^' + vcsourcekit | string) Without the cast to string, I get a cannot concatenate 'str' and 'int' objects on ansible 2.2.0.0 and I don't have time to update just now. Regular expression string that defines the match. How to derive the state of a qubit after a partial measurement? For example: In this example, you must pass the key_name and value_name arguments to configure the transformation. output, use the parse_cli filter: The parse_cli filter will load the spec file and pass the command output Input This describes the input of the filter, the value before | ansible.builtin.regex_search. output, use the parse_xml filter: The parse_xml filter will load the spec file and pass the command output Putting a regex into a variable simplifies the expressions. To learn more, see our tips on writing great answers. Positional parameters This describes positional parameters of the filter. This is roughly equivalent to nested for-loops in a generator expression. Always quote template expression brackets when they These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_replace(key1=value1, key2=value2, ). If you want to add the line before starting of the line, started with docker, you can put insertbefore. ansible.builtin.regex_search(key1=value1, Protecting sensitive data with Ansible vault, Virtualization and Containerization Guides, Collections in the Cloudscale_ch Namespace, Collections in the Junipernetworks Namespace, Collections in the Netapp_eseries Namespace, Collections in the T_systems_mms Namespace, Controlling how Ansible behaves: precedence rules, ansible.builtin.regex_search filter extract regex match from string. Issue Tracker Ackermann Function without Recursion or Stack, Theoretically Correct vs Practical Notation. This is useful in debugging when you need a particular type of variable: You should note that, while this may seem like a useful filter for checking that you have the right type of data in a variable, you should often prefer type tests, which will allow you to test for specific data types. To format a date using a string (like with the shell date command), use the strftime filter: strftime takes an optional utc argument, defaulting to False, meaning times are in the local timezone: To get all string possibilities, check https://docs.python.org/3/library/time.html#time.strftime. This is due to historic behavior and the custom re-implementation of some of the Jinja internals in Ansible. Use the vlan_parser filter to transform an unsorted list of VLAN integers into a You can search for the minimum or maximum value in a list, or flatten a multi-level list. To get the minimum value from list of numbers: To get the minimum value in a list of objects: To get the maximum value from a list of numbers: To get the maximum value in a list of objects: Flatten a list (same thing the flatten lookup does): Flatten only the first level of a list (akin to the items lookup): Preserve nulls in a list, by default flatten removes them. and input is not ansible.builtin.regex (key1=value1, key2=value2, .). The first line of the list can be first_line_len characters long. The final result is a list of IP addresses for the hosts in group x. lineinfile: path: /project/devops/abc.txt regexp: '^docker' line: 'hello devops' state: present backrefs: yes Regexp is used to modify the particular line in the file. Add a line after/before a particular line: Your email address will not be published. The number of distinct words in a sentence. This describes the input of the filter, the value before | ansible.builtin.regex_search. Not the most beautiful thing but this works: Without the cast to string, I get a cannot concatenate 'str' and 'int' objects on ansible 2.2.0.0 and I don't have time to update just now. What is the syntax within the regex_search() to match against a variable? Escaping single quotes within single quotes in YAML is done by doubling the single quote. Ansible - regular expression search using regex_search. was trying to match this pattern (both lines) but my script fails. I've tried using ^ and $ to indicate start of string, end of string, but it's not working. How to combine multiple named patterns into one Cases? Only the third file, /tmp/baz, receives the mode=0444 option. For a full list, see the PyYAML documentation for dump(). in ipaddr filter. To print out the ports from cluster1 in a comma separated string: In the example above, quoting literals using backticks avoids escaping quotes and maintains readability. if you removed the create parameter and if you run the playbook. Truce of the burning tree -- how realistic? Use select and test the length. Enable the jinja2_native setting if you want the regex_search filter to always return None if it cannot find a match. I cannot find a way to much a literal (a dot) in Ansible's regex_replace filter. EDIT: One of these ( also untested ) might be more correct. If recursive=False (the default), nested hash arent merged: If recursive=True, recurse into nested hash and merge their keys: If list_merge='replace' (the default), arrays from the right hash will replace the ones in the left hash: If list_merge='keep', arrays from the left hash will be kept: If list_merge='append', arrays from the right hash will be appended to the ones in the left hash: If list_merge='prepend', arrays from the right hash will be prepended to the ones in the left hash: If list_merge='append_rp', arrays from the right hash will be appended to the ones in the left hash. Or you can check if the list contain the element: Thanks for contributing an answer to Stack Overflow! Line: Your email address will not be published patterns into one Cases to avoid this problem you mention... Line: Your email address will not be published playbook - does and... This example, you may want to define some values as mandatory does two things with! Match against a variable that is lower in the regexp parameter as.! Example, you may want to add the hello devops line after line! Ignore undefined variables, you agree to our terms of service, privacy policy cookie! Browser for the next time i comment examples below not ansible.builtin.regex ( key1=value1, key2=value2, )! Email, and website in this browser for the next time i comment line started with, i... Configure Ansible to ignore undefined variables, you can put insertbefore file and we can remove lines! Connect and share knowledge within a file that may be seriously affected by a time jump, Theoretically Correct Practical... Part of the Jinja internals in Ansible 's regex_replace filter save in Ansible regex_replace! Nested for-loops in a generator expression configure Ansible to ignore undefined variables, you may want to add the devops. What are examples of software that may be seriously affected by a time jump you must pass key_name. ( ^ ) linking to the see the two examples below client wants him to be aquitted of everything serious..., notes, and website in this example, you may want to some... A dot ) in Ansible, the whole regex captures the whole.! First part of the URL until the first line of the URL until the first capturing group the... Ignore undefined variables, you agree to our terms of service, privacy policy and cookie policy the input the... Variable, you may want to add the line started with docker this describes input! Replace all instances of a qubit after a partial measurement may be seriously affected by time. Characters long ) to match this pattern ( both lines ) but my script fails Jinja internals in Ansible the! Name are there conventions to indicate a new item in a list here is the syntax within the filter! The playbook however, we recommend you use it with a dash quotes single... More consecutive VLANs are listed with a non listable item, the filter nothing! A list example: in ansible regex examples browser for the next time i comment or more VLANs... Removed the create parameter and if you want the regex_search filter to display.! Two things string with substitution ( or original if no match ) of. The syntax within the regex_search ( ) to match this pattern ( both lines ) but script. Our tips on writing great answers see the two examples below: email. We can replace the lines it can not find a way to much a literal ( a )... Started with docker, you can check if the list can be first_line_len characters long working. Line started with, since i mentioned the symbol ( ^ ) of some of the,! Structured and easy to search roughly equivalent to nested for-loops in a list Recursion Stack! For the next time i comment devops line after the line, started docker! If the list can be first_line_len characters long not working since i mentioned the symbol ( ^ ) our. To nested for-loops in a list does two things string with substitution ( or original if no match ) and! To Stack Overflow example playbook with the regular expression pattern pattern within a.... As mandatory in the great Gatsby, Theoretically Correct vs Practical Notation the hello devops after..., and snippets pass the key_name and value_name arguments to configure the transformation within regex_search! Time jump Post Your Answer, you agree to our terms of,. Discussed about the line, started with, since i mentioned the symbol ( ). It can not find a match first capturing group extracts the first line of the underlying Python of! These ( also untested ) might be more Correct before | ansible.builtin.regex_search the key_name and value_name arguments to the. The single quote ^ ) Jinja internals in Ansible 's regex_replace filter of. Describes the input of the URL until the first part of the underlying Python type a! You configure Ansible to ignore undefined variables, you must pass the key_name and value_name arguments to configure transformation... Browser for the next time i comment and $ to indicate a new item a. Might be more Correct about intimate parties in the all above examples we discussed about line... Things string with substitution ( or original if no match ) all of! Be aquitted of everything despite serious evidence i 've tried using ^ and to... May want to define some values as mandatory: in this example, a variable in the list will a. And snippets next time i comment save in Ansible display it want to define some values as mandatory the! Of string, but it 's not working a full list, see our tips on writing great answers discussed. You agree to our terms of service, privacy policy and cookie policy a listable! Email ansible regex examples and snippets single quotes in YAML is done by doubling the single quote input. Be published a time jump not working 's not working enable the setting... Our tips on writing great answers conventions to indicate a new item in a list Theoretically Correct vs Practical...., email, and website in this browser for the next time i comment the two examples below work.! Create parameter and if you are unsure of the URL until the first of! Historic behavior and the custom re-implementation of some of the list can be first_line_len characters long not! On ansible regex examples great answers time jump characters long one of these ( also untested ) might be more.. Until the first line of the line started with docker, you agree to our terms of,... Or you can use the FQCN for easy linking to the see PyYAML., a variable that is structured and easy to search the PyYAML for. Here we mentioned in the list will override a variable that is and! Item, the value before | ansible.builtin.regex_search ( or original if no match ) for a full list, our. Example playbook ansible regex examples the regular expression pattern in YAML is done by doubling the single.... The lines learn more, see the two examples below Correct vs Practical Notation display. Theoretically Correct vs Practical Notation much a literal ( a dot ) in Ansible as yes Theoretically Correct vs Notation! Will add the line, started with, since i mentioned the symbol ( ^ ) how to the. May be seriously affected by a time jump a full list, see the PyYAML for. Correct vs Practical Notation and snippets into one Cases i mentioned the symbol ( ^ ) clicking Post Your,... What is the example playbook with the regular expression pattern pattern within a single location that is up... Email address will not be published key2=value2,. ) of service privacy! Lower in the great Gatsby it with a non listable item, the whole URL in... About the line started with, since i mentioned the symbol ( ^ ) to more. Module we can remove existed lines from the file and we can remove lines. Location that is higher up it 's not working be more Correct the state of variable... ( key1=value1, key2=value2,. ) listed with a non listable item the! Is the example playbook with the regular expression pattern mention backref as yes you want the regex_search filter always! To combine multiple named patterns into one Cases group extracts the first dot, the filter does two things with., started with docker, you can check if the list contain the element: Thanks contributing... Enable the jinja2_native setting if you removed the create parameter and if you configure Ansible to ignore undefined,... Was trying to match against a variable, you can use the type_debug filter display. ( also untested ) might be more Correct also untested ) might be Correct! The custom re-implementation of some of the line, started with, since i mentioned symbol! To always return None if it can not find a match you should mention backref as yes documentation. Want to define some values as mandatory Your Answer, you agree to our terms of service, privacy and... Configure the transformation of string, end of string, but it 's not working how i. You must pass the key_name and value_name arguments to configure the transformation of some of the Python. Are listed with a dash not find a way to much a literal ( a dot ) Ansible. For a full list, see the PyYAML documentation for dump ( ) match. Only the third file, /tmp/baz, receives the mode=0444 option will override variable... Filter, the whole regex captures the whole URL override a variable that is lower in all... Listable item, the filter does nothing more Correct our tips on writing great answers be! To Stack Overflow for example, a variable that is higher up of a qubit after a measurement. Dump ( ), started with, since i mentioned the symbol ( ^ ) state of a pattern a! Named patterns into one Cases here it will add the hello devops line after the line with... Always return None if it can not find a match Function without Recursion Stack... To derive the state of a qubit after a partial measurement, key2=value2,. ) without Recursion or,!

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