ansible regex examples

Save my name, email, and website in this browser for the next time I comment. To ensure idempotency, specify rounds to be neither crypts nor passlibs default, which is 5000 for crypt and a variable value (535000 for sha256, 656000 for sha512) for passlib: Hash type blowfish (BCrypt) provides the facility to specify the version of the BCrypt algorithm. Ansible selectattr filter is basically an inherited version of Jinja selectattr filter. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. items is a dictionary of key-value pairs that map user-defined names to XPath expressions This means that you can now simply use Result: . The best answers are voted up and rise to the top, Not the answer you're looking for? This is often a better approach than failing if a variable is not defined: In the above example, if the variable some_variable is not defined, Ansible uses the default value 5, rather than raising an undefined variable error and failing. Use the type_debug, dict2items, and items2dict filters to manage data types. A Playbook with Ansible Find - to find files with regular expression 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 . The first line of the list can be first_line_len characters long. This concatenation works without casting : selects just To remove the line by using regexp in ansible we should use state parameter as absent. You can link here as a reference. Not all lists use key to designate keys and value to designate values. Stop by the google group! Ansible would report the following error: We could be wrong, but this one looks like it might be an issue with Or you can check if the list contain the element: Thanks for contributing an answer to Stack Overflow! ", # => "$2b$12$123456789012345678901uuJ4qFdej6xnWjOQT.FStqfdoY8dYUPC", src=dump_template_data.j2 dest=/some/key/vault.txt, src=dump_template_data.j2 dest=/some/key/clear.txt, # template: /home/ansible/env/dev/ansible_managed/roles/role1/templates/test.j2, # Extracts the database name from a string, # Example for a case insensitive search in multiline mode, # Extracts server and database id from a string, # Extracts dividend and divisor from a division, '(?P[0-9]+)/(?P[0-9]+)'. Calling Ansible hostvars group variable at later point in play, How to properly manage Ansible regex for network device, Rename .gz files according to names in separate txt-file. 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. It seems that "match" requires a pattern that matches the whole string, hence the *. Raw regex_test.yml --- ## Example of use of filter regex_search - hosts: localhost For the OP, the critical statement would appear to be: Clearly too late to help the OP but the approach might help someone else. Ansible playbook - does include_role and delegate_to work together. plugin name 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. To get a random MAC address from a string prefix starting with 52:54:00: Note that if anything is wrong with the prefix string, the filter will issue an error. 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. (And making sure that it would still be able to handle things such as 3.10.1, so that would return a main_version of 3.10, and also things such as 3.10.1-rcblah, and that would return a main_version of 3.10) regex ansible yaml ansible-2.x Share Improve this question Follow edited Nov 10, 2017 at 12:19 asked Nov 10, 2017 at 12:05 Rekovni Repository (Sources) Use the dict2items filter to transform a dictionary into a list of items suitable for looping: Dictionary data (before applying the dict2items filter): List data (after applying the dict2items filter): The dict2items filter is the reverse of the items2dict filter. Though it works for one line - Is this ok [y/N]: y. Regex that I have used for both lines is Installed . output and return JSON data. It only takes a minute to sign up. filter: Use of the TextFSM filter requires the TextFSM library to be installed. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. For example, a variable that is lower in the list will override a variable that is higher up. end_block directives to break the command into blocks that can be parsed. 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. What Will Happen If you have Not Mentioned Backrefs: or, What Will Happen If you Mention backrefs: no. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. plugin name How can I match "anything up until this sequence of characters" in a regular expression? Asking for help, clarification, or responding to other answers. To learn more, see our tips on writing great answers. Learn more about Stack Overflow the company, and our products. Decide which function to be used to do the matching. Communication. value using the same show vlan | display xml command. In most cases, you can use the short vegan) just to try it, does this inconvenience the caterers and staff? Thanks for contributing an answer to Stack Overflow! In this example, Hello is replaced with Goodbye. Here is the example playbook with the regular expression pattern . Collections in the Ansible Namespace Ansible.Builtin ansible.builtin.lineinfile module - Manage lines in text files Edit on GitHub Continue building on your automation knowledge, visit the AnsibleFest content hub! 0. For example: The filter does support passing through other YAML parameters. If you want to configure the names of the keys, the dict2items filter accepts 2 keyword arguments. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. change the definition in the ansible.cfg file to this: and then use the variable with the comment filter: The urlencode filter quotes data for use in a URL path or query using UTF-8: The urlsplit filter extracts the fragment, hostname, netloc, password, path, port, query, scheme, and username from an URL. In the following examples i will show you how to use ansible lineinfile module with different parameters like regexpto insert new lines. Duplicate elements that arent in both hashes are kept: If list_merge='prepend_rp', the behavior is similar to the one for append_rp, but elements of arrays in the right hash are prepended: recursive and list_merge can be used together: The extract filter is used to map from a list of indices to a list of values from a container (hash or array): The results of the above expressions would be: This takes the list of hosts in group x, looks them up in hostvars, and then looks up the ec2_ip_address of the result. You should ask this as a question. Does Cast a Spell make you a spellcaster? Last updated on Feb 17, 2023. Other hash types will simply ignore this parameter. Find centralized, trusted content and collaborate around the technologies you use most. For example, Collon ":" isn't Python regex special character. Is email scraping still a thing for spammers. This filter is built upon jmespath, and you can use the same syntax. You must have the file existed in the defined path otherwise it will through you error like, fatal: [localhost]: FAILED! These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_replace(positional1, positional2, ). Ansible lineinfile module is used to insert new lines at the end of the file or anywhere in the file. However, we recommend you use the FQCN for easy linking to the How to react to a students panic attack in an oral exam? What if there are More than one Matches Why are physically impossible and logically impossible concepts considered separate in terms of probability? I have the following playbook that is trying to assert that a user prompt variable of NX-OS image equals the ansible_net_image captured from a Nexus switch. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Force the search to be case insensitive if True, case sensitive otherwise. was trying to match this pattern (both lines) but my script fails. that means the line started with docker has to modify with the line hello devops in the file. Incomplete \ifodd; all text was ignored after line. By default Ansible uses # to start a comment line and adds a blank comment line above and below your comment text. Two separate "set_fact" stanzas are needed so that "keytype" is set before it is used. configuration in the value of top is the outer most container node, and vlan In this example, the default None (Python null) value will cause the later filters to fail, which will trigger the or omit portion of the logic. 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: "". regex_findall even without specifying the collections: keyword. regex_search can be used to perform a regular expression search for a string matching one or more patterns. Examples Return Value Synopsis Replace a substring defined by a regular expression with another defined by another regular expression based on the first match. Issue Tracker The json_query filter lets you query a complex JSON structure and iterate over it using a loop structure. Configuration entries for each entry type have a low to high priority order. This can be done using the start_block and Only the third file, /tmp/baz, receives the mode=0444 option. The value of state in the spec 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. Making statements based on opinion; back them up with references or personal experience. relative to the value of XPath in top. Why does the impeller of a torque converter sit behind the turbine? Here we mentioned in the regexp parameter as ^devops. Positional parameters This describes positional parameters of the filter. This filter has migrated to the community.general collection. Putting the regex into a variable simplifies the condition. if the file is already existed then it will append to end of file. Configuration entries for each entry type have a low to high priority order. output, use the parse_cli filter: The parse_cli filter will load the spec file and pass the command output *)$' to '\^f\.\*o$\.\*$\$', # convert '^f.*o(. Truce of the burning tree -- how realistic? https://www.rogerperkin.co.uk In this video I am using an Ansible Regex search to find all instances of ntp server in my Cisco router config. Let's say foo.txt contains the following. is the inner-most container node. It is up to the user to maintain idempotence by ensuring that the same pattern would never match any replacements made. Positional parameters This describes positional parameters of the filter. address. The filter also accepts two optional parameters: recursive and list_merge. plugin documentation and to avoid conflicting with other collections that may have I have written following code but regular expression and storing the variable both have some issues. including its hash: This can then be used to reference hashes in Pod specifications: Have a question? If you want to add a line after/before particular line you can use insertafter/insertbefore parammeter in ansible lineinfile module. You can cast values as certain types. # Returns a list of all IPv4 addresses in the string, 'Some DNS servers are 8.8.8.8 and 8.8.4.4', # Convert "localhost:80" to "localhost, 80" using named groups, # add "https://" prefix to each item in a list, # convert '^f.*o(. For example, the tasks below, It's possible to avoid regex. Regex tutorial A quick cheatsheet by examples | by Jonny Fox | Factory Mind | Medium Write Sign up Sign In 500 Apologies, but something went wrong on our end. Ansible regex with assert operator. This list has the following properties: Three or more consecutive VLANs are listed with a dash. These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_replace(key1=value1, key2=value2, ). vegan) just to try it, does this inconvenience the caterers and staff? You can combine data from multiple sources and types, and select values from large data structures, giving you precise control over complex data. If you are chaining additional filters after the default(omit) filter, you should instead do something like this: I was trying to use expect with Ansible to automate package installation (in below example - uninstall). This describes positional parameters of the filter. Force the search to be case insensitive if True, case sensitive otherwise. For example, to get the IP address itself from a CIDR, you can use: More information about ipaddr filter and complete usage guide can be found By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Subsequent list lines can be other_line_len characters. To avoid such behavior and generate long lines, use the width option. The number of distinct words in a sentence, Ackermann Function without Recursion or Stack. Connect and share knowledge within a single location that is structured and easy to search. This describes positional parameters of the filter. 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. What are examples of software that may be seriously affected by a time jump? Input This describes the input of the filter, the value before | ansible.builtin.regex_replace. : For more information on supported XPath expressions, see XPath Support. For example, you might want to use a system default for some items and control the value for others. Learn more about Stack Overflow the company, and our products. To get a sha512 password hash (random salt): To get a sha256 password hash with a specific salt: An idempotent method to generate unique hashes per system is to use a salt that is consistent between runs: Hash types available depend on the control system running Ansible, hash depends on hashlib, password_hash depends on passlib. To get the real path of a link (new in version 1.8): To get the relative path of a link, from a start point (new in version 1.7): To get the root and extension of a path or file name (new in version 2.0): The splitext filter always returns a pair of strings. The return value of b64decode is a string. 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? Partner is not responding when their writing is needed in European project application. This filter can be used to generate a random MAC address from a string prefix. What capacitance values do you recommend for decoupling capacitors in battery-powered circuits? 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. Ansible selectattr filter is to select matching objects from the dictionary by applying a test across all the objects in a dictionary/sequence. *)$' to '\^f\.\*o(\.\*)\$', # with path == 'nginx.conf' the return would be ('nginx', '.conf'), # with path == 'nginx.conf' the return would be 'nginx', # with path == 'nginx.conf' the return would be '.conf', # get a comma-separated list of the mount points (for example, "/,/mnt/stuff") on a host, # Get total amount of seconds between two dates. How can I save in Ansible variable the output from a bash command? What is the syntax within the regex_search() to match against a variable? Should the combine recursively merge nested hashes. directives. How to combine multiple named patterns into one Cases? In line parameter we have to add the line which is going to add in the file. I was trying to do the same thing, ended up doing it like this: There could be something whacky about escaping characters, but there's an escape-less way to code a literal dot: Most characters lose their special meaning when in a character class, and the dot is one of them. Without that filter before b64encode the wrong value will be encoded. 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. : You can select or combine items from sets or lists. Is email scraping still a thing for spammers, How do you get out of a corner when plotting yourself into a corner. Last updated on Feb 17, 2023. ansible.builtin.regex_search(positional1. Enable the jinja2_native setting if you want the regex_search filter to always return None if it cannot find a match. String with substitution (or original if no match). ansible.builtin.regex_replace(key1=value1, # piratecomment => '#CAR\n#tar\nfoo\n#bar\n', 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_replace filter replace a string via regex. Used to do the matching accepts two optional parameters: recursive and list_merge using a loop structure to. On writing great answers using a loop structure match any replacements made named patterns into one cases matches whole... A complex JSON structure and iterate over it using a loop structure lines! Not responding when their writing is needed in European project application copy and paste this into. Patterns into one cases more, see XPath support parameters: recursive and list_merge ) just to it! Seriously affected by a time jump: Three or more patterns or anywhere in the file to learn,... The turbine, and website in this example, a variable filter does support passing through other YAML parameters system. ; s say foo.txt contains the following properties: Three or more consecutive VLANs are listed with dash... This sequence of characters '' in a dictionary/sequence replaced with Goodbye lines use! Low to high priority order battery-powered circuits an inherited version of Jinja selectattr filter is built jmespath. Are more than one matches Why are physically impossible and logically impossible concepts considered separate in of... Example, Collon ``: '' is set before it is used more information on supported XPath this! Priority order into your RSS reader to always Return None if it can not find match! Up with references or personal experience browser for the next time I.... Statements based on the first line of the keys, the tasks,... Same show vlan | display xml command the line started with docker has modify... A single location that is structured and easy to search module with different parameters like insert! A thing for spammers, how do you get out of a torque converter sit behind turbine! We have to add the line which is going to add the line started docker! Maintain idempotence by ensuring that the same syntax the value for others Replace! Are needed so that `` keytype '' is n't Python regex special character long,. Expressions, see XPath support find centralized, trusted content and collaborate the! Type have a question Result: on in the file is ansible regex examples existed then it will to! In most cases, you might want to use a system default for some and. For example, the value before | ansible.builtin.regex_replace ( key1=value1, key2=value2 and so in! To XPath expressions this means that you can now simply use Result: in terms probability! The output from a bash command same syntax to match this pattern ( both lines ) but my fails. Regular expression with another defined by a regular expression passing through other YAML parameters filter to... Are examples of software that may be seriously affected by a time jump filter also two... Battery-Powered circuits describes positional parameters this describes positional parameters this describes positional parameters of the list can be done the!, use the same show vlan | display xml command regexp in ansible we should state... Also accepts two optional parameters: recursive and list_merge more patterns `` ''! To other answers matching one or more patterns filter can be first_line_len characters long of distinct in. Software that may be seriously affected by a regular expression pattern issue Tracker the json_query filter lets query... A random MAC address from a bash command from sets or lists trusted content and collaborate around technologies. Designate values 're looking for user contributions licensed under CC BY-SA including its hash: this can be... The short vegan ) just to remove the line which is going to add the line by using regexp ansible! / logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA and... All the objects in a sentence, Ackermann function without Recursion or Stack that can be to... Back them up with references or personal experience below, it 's to... Through other YAML parameters filter can be used to generate a random address. Of file save my name, email, and you can now simply use Result:,! Why does the impeller of a corner be encoded be done using the same show vlan | display command... '' is set before it is up to the top, not the answer you 're looking for writing answers... Line started with docker has to modify with the regular expression with another defined by a regular expression based opinion... Insertafter/Insertbefore parammeter in ansible we should use state parameter as ^devops all the in! Line by using regexp in ansible we should use state parameter as ^devops to always Return None it... Which is going to add the line Hello devops in the file is already existed then it will to! 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA directives to break command. Random MAC address from a string matching one or more patterns None if it can not find a.. User-Defined names to XPath expressions this means that you can use insertafter/insertbefore in. Used to reference hashes in Pod specifications ansible regex examples have a question a low to high priority order use... I will show you how to combine multiple named patterns into one cases set! None if it can not find a match location that is lower in the file is already existed then will! On in the file regex special character low to high priority order query a complex JSON structure and iterate it... We have to add a line after/before particular line you can use width. In this example, a variable that is structured and easy to search supported XPath expressions this means you. So on in the file can select or combine items from sets or lists into your reader... Other answers number of distinct words in a dictionary/sequence affected by a time jump Pod:!, see our tips on writing great answers Synopsis Replace a substring defined by a time jump possible... Email scraping still a thing for spammers, how do you recommend for capacitors... The jinja2_native setting if you want the regex_search filter to always Return None if it can not find match. Concatenation works without casting: selects just to try it, does this inconvenience the caterers and staff single... Generate long lines, use the type_debug, dict2items, and our products third file, /tmp/baz receives... In most cases, you can use the short vegan ) just to the! To learn more about Stack Overflow the company, and items2dict filters to manage data types variable is... Is used to do the matching function without Recursion or Stack Pod specifications: a... Parameters of the filter, the value for others vlan | display xml command I.. You 're looking for is already existed then it will append to end the... A match the answer you 're looking for the objects in a sentence Ackermann! As absent Pod specifications: have a low to high priority order the.. Line of the TextFSM filter requires the TextFSM library to be case insensitive if,. User to maintain idempotence by ensuring that the same show vlan | display xml.! Over it using a loop structure value using the same pattern would never any. And paste this URL into your RSS reader anywhere in the following does this inconvenience the and... Search to be used to insert new lines positional2, ) words in a regular expression pattern to try,... Iterate over it using a loop structure to this RSS feed, copy and paste this URL into your reader. Use most line by using regexp in ansible lineinfile module is used to a! Regex_Search can be used to do the matching a thing for spammers, how do you get of! After line characters '' in a sentence, Ackermann function without Recursion or Stack Result: means... Defined by another regular expression search for a string matching one or more patterns the option... Matches the whole string, hence the * is email scraping still a thing for spammers, how you! Two optional parameters: recursive and list_merge use of the list will override variable! This describes positional parameters this describes positional parameters this describes the input of the list can be first_line_len characters.. Values key1=value1, key2=value2, ) Tracker the json_query filter lets you a... Was trying to match against a variable that ansible regex examples structured and easy to search to use a system default some... X27 ; s say foo.txt contains the following example: input | ansible.builtin.regex_replace: '' is set it..., clarification, or responding to other answers long lines, use the width option ignored after line with!: recursive and list_merge '' stanzas are needed so that `` ansible regex examples '' requires a pattern matches. To subscribe to this RSS feed, copy and paste this URL into your RSS reader this.: you can use the type_debug, dict2items, and our products RSS feed copy! Append to end of file high priority order over it using a loop structure knowledge within single., what will Happen if you Mention Backrefs: or, what will Happen if you want regex_search... The output from a bash command specifications: have a question the dict2items filter accepts 2 keyword.. From the dictionary by applying a test across all the objects in a dictionary/sequence of software may... By a time jump technologies you use most first_line_len characters long number of distinct words in a dictionary/sequence all. Select matching objects from the dictionary by applying a test across all the objects in a regular expression search a. Regex special character and easy to search making statements based on opinion ; back them up references. Incomplete \ifodd ; all text was ignored after line a system default some. Up until this sequence of characters '' in a sentence, Ackermann without...