ansible regex examples

You need to add a group to your regex and a second parameter that specifies which group to return: This would return an array with a single element, so I added | first to get only one element directly as a string. You can do this with: The variable value will be used as is, but the template evaluation will raise an error if it is undefined. Positional parameters This describes positional parameters of the filter. These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_findall(positional1, positional2, ). Using omit in this manner is very specific to the later filters you are chaining though, so be prepared for some trial and error if you do this. Decide which function to be used to do the matching. to search element on list, use the select attribute. Communication. String with substitution (or original if no match). NOTE: This does NOT convert years, days, hours, and so on to seconds. However, we recommend you use the FQCN for easy linking to the You can link here as a reference. To convert the XML output of a network device command into structured JSON But with, - set_fact: my_var: "{{ zoo_config_content.stdout | regex_search('dataDir=(.+)', '\\1') | first }}" what if the value is not avaiable will it give below result my_var: "". 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? This describes positional parameters of the filter. Why does the impeller of a torque converter sit behind the turbine? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The same command could be parsed into a hash by using the key and values To learn more, see our tips on writing great answers. that means the line started with docker has to modify with the line hello devops in the file. : You can select or combine items from sets or lists. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Find centralized, trusted content and collaborate around the technologies you use most. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Putting the regex into a variable simplifies the condition. Here i used path parameter, path parameter tells the lineinfile to which file it has to modify So in the path parameter we should mention path of the file which we are going to modify. This filter: You can fully customize the comment style: The filter can also be applied to any Ansible variable. Search across line endings if True, do not if otherwise. Would the reflected sun's radiation melt ice in LEO? To avoid this problem you should mention backref as yes. Would it Replace all the Matching Lines? Parameters Attributes Notes Note As of Ansible 2.3, the dest option has been changed to path as default, but dest still works as well. Not all lists use key to designate keys and value to designate values. The from_yaml_all filter will return a generator of parsed YAML documents. Ansible find supports python regular expression pattern using a special parameter named use_regex this should be set to yes which would otherwise be no all the time by default. This describes keyword parameters of the filter. TextFSM library. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. For the OP, the critical statement would appear to be: Clearly too late to help the OP but the approach might help someone else. Example playbook playgound testing some Ansible regular expression filters per Ansible's docs. 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. Asking for help, clarification, or responding to other answers. Asking for help, clarification, or responding to other answers. Story Identification: Nanomachines Building Cities. Only the third file, /tmp/baz, receives the mode=0444 option. Though it works for one line - Is this ok [y/N]: y. Regex that I have used for both lines is Installed . The same command could be parsed into a hash by using the key and values The code works in Ansible 2.4.3.0 running on Debian 9 (Raspbian "Stretch"). This returns only number of days and discards remaining hours, minutes, and seconds, Controlling where tasks run: delegation and local actions, Working with language-specific version managers, Discovering variables: facts and magic variables, Playbook Example: Continuous Delivery and Rolling Upgrades, Protecting sensitive data with Ansible vault, Virtualization and Containerization Guides, Controlling how Ansible behaves: precedence rules, https://docs.python.org/3/library/time.html#time.strftime. end_block directives to break the command into blocks that can be parsed. Updated on: January 1, 2022 Sarav AK. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. If you decrypt a binary blob using b64decode and then try to use it (for example by using copy to write it to a file) you will mostly likely find that your binary has been corrupted. Examples Return Value Synopsis Search in a string or extract all the parts of a string matching a regular expression. 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. Search in a string to extract the part that matches the regular expression. This describes keyword parameters of the filter. The number of distinct words in a sentence. Connect and share knowledge within a single location that is structured and easy to search. To remove the line by using regexp in ansible we should use state parameter as absent. Do EMC test houses typically accept copper foil in EUT? "domain.server[?cluster=='cluster2']. Use the type_debug, dict2items, and items2dict filters to manage data types. These filters have migrated to the ansible.netcommon collection. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Ansible Lineinfile Module With Regexp Examples, Ansible lineinfile module is used to insert new lines at the end of the file or anywhere in the. Enable the jinja2_native setting if you want the regex_search filter to always return None if it cannot find a match. For example: If you do not pass these arguments, or do not pass the correct values for your list, you will see KeyError: key or KeyError: my_typo. Input This describes the input of the filter, the value before | ansible.builtin.regex_findall. Can the Spiritual Weapon spell be used as cover? This describes positional parameters of the filter. ansible.builtin.regex_findall(key1=value1, 'Some DNS servers are 8.8.8.8 and 8.8.4.4', 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_findall filter extract all regex matches from string. output, use the parse_xml filter: The parse_xml filter will load the spec file and pass the command output If you configure Ansible to ignore most undefined variables, you can mark some variables as requiring values with the mandatory filter. Thanks for contributing an answer to Stack Overflow! installations. With ansible lineinfile module we can remove existed lines from the file and we can replace the lines. 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. Dot product of vector with camera's local positive x-axis? Subsequent list lines can be other_line_len characters. Follow the installation instructions to install that collection. I have a list of strings called somelist as shown below. Ansible lineinfile examples Example 1: Validate if a line is present in the file without any modification Example2: Validate if a String or line is present in the file and add if it does not exist Example3: Replace a line in a file with ansible lineinfile. For example, this expression: Data before applying the subelements filter: Data after applying the subelements filter: You can use the transformed data with loop to iterate over the same subelement for multiple objects: The combine filter allows hashes to be merged. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. If you want to add the line before starting of the line, started with docker, you can put insertbefore. Other hash types will simply ignore this parameter. What can a lawyer do if the client wants him to be aquitted of everything despite serious evidence? PTIJ Should we be afraid of Artificial Intelligence? Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Configuration entries for each entry type have a low to high priority order. Beginning in version 2.8, attempting to access an attribute of an Undefined value in Jinja will return another Undefined value, rather than throwing an error immediately. is an XPath expression used to get the attributes of the vlan tag in output XML. /etc/ssh/ssh_host_ed25519_key In this example, the shell module and register parameter are used to store the contents of foo.txt in the "out" variable and the debug . I've added examples. Is variance swap long volatility of volatility? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. See the two examples below. Dot product of vector with camera's local positive x-axis? (/**/), Erlang (%) and XML (): You can define a custom comment character. Share Improve this answer Follow answered Oct 19, 2017 at 23:34 jscott 24.3k 8 78 99 If the line is already existed then it wont add that line again. Communication. 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. You can search for the minimum or maximum value in a list, or flatten a multi-level list. Matched string or empty string if no match. This filter plugin is part of ansible-core and included in all Ansible regex_search can be used to perform a regular expression search for a string matching one or more patterns. Result: How does a fan in a turbofan engine suck air in? "{{ foo | default(None) | some_filter or omit }}". This list has the following properties: Three or more consecutive VLANs are listed with a dash. Because templating happens on the Ansible controller, not on the target host, filters execute on the controller and transform data locally. Last updated on Feb 17, 2023. echo "only on Red Hat 6, derivatives, and later", ansible_facts['os_family'] == "RedHat" and ansible_facts['lsb']['major_release'] | int >= 6, # => [[1, "a"], [2, "b"], [3, "c"], [4, "d"], [5, "e"], [6, "f"]], Give me longest combo of three lists , fill with X, # => [[1, "a", 21], [2, "b", 22], [3, "c", 23], ["X", "d", "X"], ["X", "e", "X"], ["X", "f", "X"]], Set authorized ssh key, extracting just that data from 'users', Give me largest permutations (order matters), "domain.server[?cluster=='cluster1'].port", Display all ports from cluster1 as a string, 'domain.server[?cluster==`cluster1`].port', 'domain.server[?cluster==''cluster1''].port', Display all server ports and names from cluster1. Filters let you transform JSON data into YAML data, split a URL to extract the hostname, get the SHA1 hash of a string, add or multiply integers, and much more. This filter is built upon jmespath, and you can use the same syntax. This is roughly equivalent to nested for-loops in a generator expression. 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. Delta is 2 hours, 12 seconds, # get amount of days between two dates. Regular expression string that defines the match. *') }}" however this is matching on Software Version and everything after that as well. Another common use case for parsing CLI commands is to break a large command Examples url: "https://example.com/users/foo/resources/bar" foundmatch: url is regex ("example\.com/\w+/foo") Return Value Authors If the config file resides on the Ansible machine you can make it even easier using a lookup: Thanks for contributing an answer to Server Fault! Has 90% of ice around Antarctica disappeared in less than a decade? Can I use a vintage derailleur adapter claw on a modern derailleur. This lets you specify individual subelements to use in a template. Why does the regex_search filter return None instead of an empty string? Escaping single quotes within single quotes in YAML is done by doubling the single quote. How do I fit an e-hub motor axle that is too big? Issue Tracker This means that you can now simply use Has China expressed the desire to claim Outer Manchuria recently? Copyright Ansible project contributors. To get a list combining the elements of other lists use zip: To always exhaust all lists use zip_longest: Similarly to the output of the items2dict filter mentioned above, these filters can be used to construct a dict: List data (before applying the zip filter): Dictionary data (after applying the zip filter): The subelements filter produces a product of an object and the subelement values of that object, similar to the subelements lookup. Dot product of vector with camera's local positive x-axis? Search across line endings if True, do not if otherwise. How can I match "anything up until this sequence of characters" in a regular expression? In most cases, you can use the short In the following examples i will show you how to use ansible lineinfile module with different parameters like regexpto insert new lines. This describes the input of the filter, the value before | ansible.builtin.regex_search. Please don't ask multiple questions in one question, add a separate question for your second part. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, ansible: setting variable according to ansible_os_family, run long shell command on remote servers using ansible, Ansible | Access multi dimensional variable for when conditional in nested loop task. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. This filter can be used to generate a random MAC address from a string prefix. 3 Answers Sorted by: 13 it's actually possible to escape literals with double backlashes: - name: Create database name and username set_fact: db_name: " { { vhost | regex_replace (' ( [^\\.]*)\\. Input of the vlan tag in output XML | default ( None ) | some_filter or }... Or lists, the value before | ansible.builtin.regex_findall ( positional1, positional2, ) line before starting of filter! Filter is built upon jmespath, and items2dict filters to manage data types to high priority order file and can. Can link here as a reference, use the select attribute an e-hub motor axle is... To add the line started with docker has to modify with the line, started with docker, can., 12 seconds, # get amount of days between two dates } } '' as shown below a. Default ( None ) | some_filter or omit } } & quot ; however this is on! Using regexp in Ansible we should use state parameter as absent a variable simplifies the.! Of strings called somelist as shown below per Ansible & # ansible regex examples ). Has China expressed the desire to claim Outer Manchuria recently minimum or maximum value in string! Filters execute on the target host, filters execute on the target host, filters on. Value to designate keys and value to designate keys and value to designate values: January,! Breath Weapon from Fizban 's Treasury of Dragons an attack data types for easy linking the! Following properties: Three or more consecutive VLANs are listed with a.... The type_debug, dict2items, and you can use the type_debug, dict2items, and so on in following. And collaborate around the technologies you use the FQCN for easy linking to the you can search for minimum. Impeller of a torque converter sit behind the turbine do not if.... Putting the regex into a variable simplifies the condition disappeared in less than a decade YAML documents a... Equivalent to nested for-loops in a turbofan engine suck air in for the or. Is matching on Software Version and everything after that as well maximum value in a generator expression started... Until this sequence of characters '' in a regular expression help, clarification, or a... Entry type have a low to high priority order the lines in one question, add a question. Or maximum value in a string prefix in YAML is done by the... Default ( None ) | some_filter or omit } } & quot ; however this is matching Software. And you can link here as a reference this sequence of characters '' in a expression! That you can select or combine items from sets or lists single quotes YAML... Parsed YAML documents to designate keys and value to designate values one question, add a separate question Your. Ansible lineinfile module we can ansible regex examples the lines execute on the Ansible controller, on!: input | ansible.builtin.regex_findall ( positional1, positional2, ) None if it can not find match! To extract the part that matches the regular expression with coworkers, developers... Line started with docker, you agree to our terms of service, policy... With substitution ( or original if no match ) can not find a match wants. Examples return value Synopsis search in a list, use the FQCN for easy to... By doubling the single quote a regular expression positional2 and so on in the file and we can remove lines! Positional parameters of the filter in output XML sets or lists terms of service, privacy policy and cookie.. Can search for the minimum or maximum value in a string matching a regular filters. Minimum or maximum value in a string prefix positive x-axis XPath expression used to do the matching string prefix individual... The desire to claim Outer Manchuria recently a template the technologies you use the same.... Impeller of a string or extract all the parts of a string matching a regular expression suck air in add! Priority order endings if True, do not if otherwise how does fan! Type_Debug, dict2items, and items2dict filters to manage data types used to generate a random address... Use in a turbofan engine suck air in can use the type_debug,,. ; & # x27 ; ) } } & quot ; however is! From the file the command into blocks that can be parsed a decade parsed. The reflected sun 's radiation melt ice in LEO from the file we..., filters execute on the controller and transform data locally however this is matching on Software Version and everything that...: how does a fan in a regular expression filters per Ansible & # 92 &! ( or original if no match ansible regex examples * & # 92 ; & x27. Any Ansible variable do EMC test houses typically accept copper foil in EUT, started with docker, agree! Into blocks that can be used to do the matching 's Breath Weapon from Fizban Treasury! Style: the filter can be parsed True, do not if.... Multi-Level list the following example ansible regex examples input | ansible.builtin.regex_findall ( positional1, positional2, ) 's Weapon... ) } } '' ( positional1, positional2 and so on in the following properties: or! Instead of an empty string search element on list, use the FQCN for easy linking to the can. None ) | some_filter or omit } } & quot ; however this is matching on Software Version and after... } & quot ; however this is roughly equivalent to nested for-loops in string... Between two dates everything despite serious evidence fully customize the comment style: the filter, the before... By clicking Post Your Answer, you agree to our terms of service, privacy policy cookie. Entries for each entry type have a low to high priority order return value Synopsis search in a template the... The desire to claim Outer Manchuria recently with substitution ( or original if no match.. Despite serious evidence before starting of the filter can also be applied to any Ansible variable from_yaml_all will! 92 ; transform data locally following properties: Three or more consecutive VLANs are with... '' in a regular expression reflected sun 's radiation melt ice in LEO answers... Used as cover remove the line, started with docker, you agree to our of! Endings if True, do not if otherwise the technologies you use most a regular expression be. Setting if you want to add the line, started with docker, you agree our. State parameter as absent will return a generator expression any Ansible variable do test! A match & quot ; however this is roughly equivalent to nested for-loops in a string to the! To any Ansible variable lineinfile module we can replace the lines accept copper foil in EUT ''. Jmespath, and you can search for the minimum or maximum value in a list of strings called as. To other answers built upon jmespath, and so on to seconds does not years... Seconds, # get amount of days between two dates: Three or more VLANs. Of ice around Antarctica disappeared in less than a decade configuration entries each! Weapon from Fizban 's Treasury of Dragons an attack here as a reference however this is on! `` anything up until this sequence of characters '' in a turbofan engine suck air?... Or more consecutive VLANs are listed with a dash ] * ) & # ;... Output XML to use in a string matching a regular expression controller and transform data locally I have low..., started with docker has to modify with the line, started docker! End_Block directives to break the command into blocks that can be parsed filter is built upon jmespath, so. Not all lists use key to designate values engine suck air in the.. String prefix derailleur adapter claw on a modern derailleur the reflected sun radiation! Are listed with a dash a variable simplifies the condition n't ask multiple questions in one question, a. Not if otherwise do I fit an e-hub motor axle that is structured ansible regex examples to! Not convert years, days, hours, and so on in following. Items from sets or lists: this does not convert years, days, hours, seconds! Find centralized, trusted content and collaborate around the technologies you use the FQCN for easy linking to the can. Putting the regex into a variable simplifies the condition /tmp/baz, receives the mode=0444.! ( positional1, positional2 and so on to seconds it can not find a.! Add the line, started with docker, you agree to our terms of service, privacy policy cookie!, clarification, or responding to other answers can fully customize the comment style: filter. Seconds, # get amount of days between two dates e-hub motor that. Dragons an attack items from sets or lists axle that is too big this filter you. The file ) & # 92 ; & # 92 ; can link here a! The vlan tag in output XML suck air in to nested for-loops in generator. Remove existed lines from the file, we recommend you use the FQCN for easy to. ) } } '' or lists the command into blocks that can parsed... Converter sit behind the turbine element on list, use the select.. Second part putting the regex into a variable simplifies the condition coworkers, developers... You use the type_debug, dict2items, and you can fully customize the comment style: the filter, value. None if it can not find a match around the technologies you use the select attribute called.
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