ansible - example of using map + regex_replace to modify all items in a list Raw 00_play.yml This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. 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. plugin name Learn more about Stack Overflow the company, and our products. (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 --- - name: Upgrade NX-OS on switch with pre-checks to load image as required . 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. I'm also not sure if it's consitent with Ansible/Jinja2 best practice. *) on some Python versions will match the whole string and an empty string at the end, which means it will make two replacements: Prior to ansible 2.0, if regex_replace filter was used with variables inside YAML arguments (as opposed to simpler key=value arguments), then you needed to escape backreferences (for example, \\1) with 4 backslashes (\\\\) instead of 2 (\\). 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. 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. NOTE: This does NOT convert years, days, hours, and so on to seconds. This is roughly equivalent to nested for-loops in a generator expression. Result: 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. The spec file should be valid formatted YAML. The network filters also support parsing the output of a CLI command using the will parse the output from the show vlan | display xml command. the same test plugin name. 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 . 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. Do EMC test houses typically accept copper foil in EUT? 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. Use the k8s_config_resource_name filter to obtain the name of a Kubernetes ConfigMap or Secret, Ackermann Function without Recursion or Stack, Theoretically Correct vs Practical Notation. Learn more about Stack Overflow the company, and our products. To convert the XML output of a network device command into structured JSON This means that you can now simply use Making statements based on opinion; back them up with references or personal experience. Examples Synopsis This module will replace all instances of a pattern within a file. 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. 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! If you are chaining additional filters after the default(omit) filter, you should instead do something like this: as in example? These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_findall(positional1, positional2, ). Ansible Lineinfile With Regexp Example: --- - hosts: localhost gather_facts: no tasks: - name: Ansible check directory. which is an XPath expression relative to the root node (). Given below are the examples of Ansible find: Example #1 Recursively search the /etc. Can the Spiritual Weapon spell be used as cover? Though it works for one line - Is this ok [y/N]: y. Regex that I have used for both lines is Installed . It's not necessary to escape it. 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. Truce of the burning tree -- how realistic? We check the file's existence, simply by ls, and check the return code. The basic filters are occasionally useful for debugging: You can change the indentation of either format: The to_yaml and to_nice_yaml filters use the PyYAML library which has a default 80 symbol string length limit. vegan) just to try it, does this inconvenience the caterers and staff? You can link here as a reference. Ansible Map Filter Examples - Looking up an Attribute Ansible Map Examples - using other Filters Using Replace filter with Ansible Map Using Extract filter in Ansible Map - with List/Sequence Using Extract filter in Ansible Map - with Dictionary/Hashtable Conclusion What is Ansible Map Filter and How it works? 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. For example, a variable that is lower in the list will override a variable that is higher up. plugin name Search in a string or extract all the parts of a string matching a regular expression. However, we recommend you use the FQCN for easy linking to the 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. a default with a value in a nested data structure (in other words, {{ foo.bar.baz | default('DEFAULT') }}) when you do not know if the intermediate values are defined. Use select and test the length. Is a hot staple gun good enough for interior switch repair? However, we recommend you use the FQCN for easy linking to the You can also use Python methods to transform data. Here is an example of how to parse the output into a hash 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. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. that means the line started with docker has to modify with the line hello devops in the file. The third argument to the filter can also be a list, for a recursive lookup inside the container: This would return a list containing the value of b[a][x][y]. How can I store that extracted value to use in another task? 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 . However, you can make specific variables optional. 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? plugin documentation and to avoid conflicting with other collections that may have rev2023.3.1.43269. For example, the tasks below - debug: msg: bob is in the list when: somelist|select ('search', regex)|list|length > 0 vars: regex: '^name: bob$' - debug: msg: bobby is in the list when: somelist|select ('search', regex)|list|length > 0 vars: regex: '^name: bobby$' gives (abridged) Ansible playbook - does include_role and delegate_to work together. Incomplete \ifodd; all text was ignored after line. You must have the file existed in the defined path otherwise it will through you error like, fatal: [localhost]: FAILED! Copyright Ansible project contributors. 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. Truce of the burning tree -- how realistic? These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_findall(key1=value1, key2=value2, ). Asking for help, clarification, or responding to other answers. Save my name, email, and website in this browser for the next time I comment. erbrito / regex_test.yml Created 3 years ago Star 4 Fork 1 Code Revisions 1 Stars 4 Forks 1 Embed Download ZIP Ansible example to use regex_search filter. This describes keyword parameters of the filter. 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. Examples Return Value Synopsis Search in a string to extract the part that matches the regular expression. 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. The first line of the list can be first_line_len characters long. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The json_query filter lets you query a complex JSON structure and iterate over it using a loop structure. Server Fault is a question and answer site for system and network administrators. 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. Examples url: "https://example.com/users/foo/resources/bar" foundmatch: url is regex ("example\.com/\w+/foo") Return Value Authors If you run the playbook again no changes will happen to that file since lineinfile will add the line if the line is not exists. This list has the following properties: Three or more consecutive VLANs are listed with a dash. is an XPath expression used to get the attributes of the vlan tag in output XML. Force the search to be case insensitive if True, case sensitive otherwise. It only takes a minute to sign up. The filter also accepts two optional parameters: recursive and list_merge. The debug looks like: 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 It defines how to parse the XML Here is an example of how to parse the output into a hash . It doesn't evaluate the variable, rather interprets literally. Partner is not responding when their writing is needed in European project application. Below is an example of a valid spec file that If you run the playbook multiple times, the line will be added taht number of times. This filter can be used to generate a random MAC address from a string prefix. items is a dictionary of key-value pairs that map user-defined names to XPath expressions By default Ansible uses # to start a comment line and adds a blank comment line above and below your comment text. Delta is 2 hours, 12 seconds, # get amount of days between two dates. Search across line endings if True, do not if otherwise. Search across line endings if True, do not if otherwise. You can search for the minimum or maximum value in a list, or flatten a multi-level list. Putting the regex into a variable simplifies the condition. You must use a hardcoded number to define the width, instead of a construction like float("inf"), because the filter does not support proxying Python functions. It is up to the user to maintain idempotence by ensuring that the same pattern would never match any replacements made. 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. For example, the tasks below, It's possible to avoid regex. output and return JSON data. # 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(. Has China expressed the desire to claim Outer Manchuria recently? How can I set an Ansible variable depending on hostname? output, use the parse_cli filter: The parse_cli filter will load the spec file and pass the command output This describes positional parameters of the filter. Positional parameters This describes positional parameters of the filter. 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. Making statements based on opinion; back them up with references or personal experience. What are examples of software that may be seriously affected by a time jump? The final result is a list of IP addresses for the hosts in group x. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Matched string or empty string if no match. PTIJ Should we be afraid of Artificial Intelligence? A Playbook with Ansible Find - to find files with regular expression you can remove the "name: " on your list as it's still the same to every elt. What does meta-philosophy have to say about the (presumably) philosophical work of non professional philosophers? Decide which function to be used to do the matching. Last updated on Feb 17, 2023. What Will Happen If you have Not Mentioned Backrefs: or, What Will Happen If you Mention backrefs: no. Required fields are marked *. The Xpath expression is relative to the value of the XPath value contained in top. Putting a regex into a variable simplifies the expressions. 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. This describes the input of the filter, the value before | ansible.builtin.regex_search. regex_search can be used to perform a regular expression search for a string matching one or more patterns. ansible-regexp. This set of filters returns a list of combined lists. Ansible would report the following error: We could be wrong, but this one looks like it might be an issue with Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Add a line after/before a particular line: Your email address will not be published. Search across line endings if True, do not if otherwise. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The best answers are voted up and rise to the top, Not the answer you're looking for? You can use the Ansible-specific filters documented here to manipulate your data, or use any of the standard filters shipped with Jinja2 - see the list of built-in filters in the official Jinja2 template documentation. into blocks that can be parsed. With ansible lineinfile module we can remove existed lines from the file and we can replace the lines. 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. Other hash types will simply ignore this parameter. By default, Ansible fails if a variable in your playbook or command is undefined. Examples Return Value Synopsis Search in a string or extract all the parts of a string matching a regular expression. plugin documentation and to avoid conflicting with other collections that may have 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. Would the reflected sun's radiation melt ice in LEO? The code works in Ansible 2.4.3.0 running on Debian 9 (Raspbian "Stretch"). Regular expression to match a line that doesn't contain a word, RegEx match open tags except XHTML self-contained tags, Regular expression to stop at first match, Negative matching using grep (match lines that do not contain foo), Regex Match all characters between two strings. It only takes a minute to sign up. 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. Replace part of the regular expresion, Ansible | Access multi dimensional variable for when conditional in nested loop task, Ansible how to get output as variable without brackets and u, How to validate the variable value with regex in ansible, Ansible: Iteration fails while looping over output variable, Using variable lists in ansible returns undefined variable. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The spec file should be valid formatted YAML. In lineinfile module we can use different parameters depends on our requirement. For example: The filter does support passing through other YAML parameters. You can provide default values for variables directly in your templates using the Jinja2 default filter. Communication. plugin documentation and to avoid conflicting with other collections that may have was trying to match this pattern (both lines) but my script fails. Share Improve this answer Follow answered Oct 19, 2017 at 23:34 jscott 24.3k 8 78 99 These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_replace(key1=value1, key2=value2, ). Copyright Ansible project contributors. 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. vegan) just to try it, does this inconvenience the caterers and staff? To extract all occurrences of regex matches in a string, use the regex_findall filter: To replace text in a string with regex, use the regex_replace filter: If you want to match the whole string and you are using * make sure to always wraparound your regular expression with the start/end anchors. This filter has migrated to the community.general collection. EDIT: One of these ( also untested ) might be more correct. How to derive the state of a qubit after a partial measurement? These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_replace(positional1, positional2, ). Connect and share knowledge within a single location that is structured and easy to search. Run: Updated on: January 1, 2022 Sarav AK. Can I use a vintage derailleur adapter claw on a modern derailleur. Issue Tracker output, use the parse_xml filter: The parse_xml filter will load the spec file and pass the command output directives. Why does the regex_search filter return None instead of an empty string? I've added examples. 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. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? For that, use total_seconds(), # This expression evaluates to "12" and not "132". *)$' to '\^f\.\*o\(\.\*\)\$', # convert '^f.*o(. 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. To add the line to the file, we should mention state parameter as present. 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. Story Identification: Nanomachines Building Cities. These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_search(positional1, positional2, ). we should mention backrefs as yes. I was trying to use expect with Ansible to automate package installation (in below example - uninstall). In line parameter we have to add the line which is going to add in the file. Input This describes the input of the filter, the value before | ansible.builtin.regex_findall. Regular expression string that defines the match. Examples Return Value Synopsis Replace a substring defined by a regular expression with another defined by another regular expression based on the first match. With ansible lineinfile module we can remove existed lines from the file and we can replace the lines. You can create custom Ansible filters as plugins, though we generally welcome new filters into the ansible-core repo so everyone can use them. Communication. To parse the CLI output with TextFSM use the following Without that filter before b64encode the wrong value will be encoded. *') }}" however this is matching on Software Version and everything after that as well. 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. in ipaddr filter. missing quotes. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. This filter plugin is part of ansible-core and included in all Ansible Or you can check if the list contain the element: Thanks for contributing an answer to Stack Overflow! Force the search to be case insensitive if True, case sensitive otherwise. Is a string, its possible values are replace (default), keep, append, prepend, append_rp or prepend_rp. Regular expression string that defines the replacement. Asking for help, clarification, or responding to other answers. If you order a special airline meal (e.g. Valid values for this parameter are: [2, 2a, 2y, 2b]. My application required "not" in the "when" statement but it would not be needed to answer the original question. 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 (' ( [^\\.]*)\\. For example, if you expect the input "True" from a vars_prompt and you want Ansible to recognize it as a boolean value instead of a string: - ansible.builtin.debug: msg: test when: some_string_value | bool If you want to perform a mathematical comparison on a fact and you want Ansible to recognize it as an integer instead of a string: For example, you might want to use a system default for some items and control the value for others. If there is no line started with docker it wont change anything in the file, the file will be left unchanged. This describes positional parameters of the filter. This is untested BTW. For example ^(. rev2023.3.1.43269. If you use it with a non listable item, the filter does nothing. You are reading the latest (stable) community version of the Ansible documentation. In the example XML output given below, the value of top is configuration/vlans/vlan, What if there are More than one Matches If you order a special airline meal (e.g. What can a lawyer do if the client wants him to be aquitted of everything despite serious evidence? regex even without specifying the collections: keyword. regex_replace even without specifying the collections: keyword. Last updated on Feb 17, 2023. ansible.builtin.regex_replace(positional1. : For more information on supported XPath expressions, see XPath Support. 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. Copyright Ansible project contributors. the same filter plugin name. Ansible Map Filter does two things This can be done using the start_block and vegan) just to try it, does this inconvenience the caterers and staff? It seems that "match" requires a pattern that matches the whole string, hence the *. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Connect and share knowledge within a single location that is structured and easy to search. This can be useful in a roles defaults. the same filter plugin name. Can I use a vintage derailleur adapter claw on a modern derailleur, Ackermann Function without Recursion or Stack. For below, vcsourcekit = 10, I want to match regex ^10. a specific sequence of, Factory Mind is a young and dynamic cooperative consisting of a team of passionate developers, with a kick for computer science, technology and innovation. Putting the regex into a variable simplifies the condition. output and return JSON data. Q1.) For example, the following would override keys in one hash: The filter can also take multiple arguments to merge: In this case, keys in d would override those in c, which would override those in b, and so on. Example playbook playgound testing some Ansible regular expression filters per Ansible's docs. You need to add a group to your regex and a second parameter that specifies which group to return: - set_fact: my_var: " { { zoo_config_content.stdout | regex_search ('dataDir= (.+)', '\\1') | first }}" This would return an array with a single element, so I added | first to get only one element directly as a string. my play looks like: - name: Get version set_fact: version: "{{ show_version.stdout | regex_search('Software Version. Force the search to be case insensitive if True, case sensitive otherwise. "https://example.com/users/foo/resources/bar", 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 test Does string match regular expression from the start.
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