ansible regex examples

Without that filter before b64encode the wrong value will be encoded. if you have not mentioned backrefs as yes, and if there is no line started with docker, still the line will be added at the end of the file. For example, a variable that is lower in the list will override a variable that is higher up. It doesn't evaluate the variable, rather interprets literally. installations. To review, open the file in an editor that reveals hidden Unicode characters. How can I match literals in Ansible regexp_replace filter? Positional parameters This describes positional parameters of the filter. It defines how to parse the XML The first line of the list can be first_line_len characters long. 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: 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. I've added examples. Putting the regex into a variable simplifies the condition. That causes unexpected line break after 80th symbol (if there is a space after 80th symbol) output, use the parse_xml filter: The parse_xml filter will load the spec file and pass the command output By default backrefs value is no, so if you have not mentioned backrefs in the task it will assume like backref: no. Jordan's line about intimate parties in The Great Gatsby? Because templating happens on the Ansible controller, not on the target host, filters execute on the controller and transform data locally. Regular expression string that defines the match. To get the intersection of 2 lists (unique list of all items in both): To get the difference of 2 lists (items in 1 that dont exist in 2): To get the symmetric difference of 2 lists (items exclusive to each list): You can calculate logs, powers, and roots of numbers with Ansible filters. Ansible Lineinfile With Regexp Example: --- - hosts: localhost gather_facts: no tasks: - name: Ansible check directory. Has 90% of ice around Antarctica disappeared in less than a decade? Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. How did StorageTek STC 4305 use backing HDDs? GitHub Instantly share code, notes, and snippets. Copyright Ansible project contributors. 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! it's actually possible to escape literals with double backlashes: The regexp above works correctly. Learn more about Stack Overflow the company, and our products. Filters can help you manage missing or undefined variables by providing defaults or making some variables optional. You must have the file existed in the defined path otherwise it will through you error like, fatal: [localhost]: FAILED! Another common use case for parsing CLI commands is to break a large command Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. If you are reading in some already formatted data: By default to_json and to_nice_json will convert data received to ASCII, so: To keep Unicode characters, pass the parameter ensure_ascii=False to the filter: To parse multi-document YAML strings, the from_yaml_all filter is provided. my play looks like: - name: Get version set_fact: version: "{{ show_version.stdout | regex_search('Software Version. (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 For a full list, see the PyYAML documentation for dump(). 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. 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 (' ( [^\\.]*)\\. How can I save in Ansible variable the output from a bash command? Here it will remove the line started with docker. Ansible Architecture-Ansible Architecture PPT. You're welcome. The from_yaml_all filter will return a generator of parsed YAML documents. 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? How can I store that extracted value to use in another task? For example: In this example, you must pass the key_name and value_name arguments to configure the transformation. This symbol represents the line starting with, if you want to know more different options you should learn python regexp. The number of distinct words in a sentence. 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_search. It only takes a minute to sign up. 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. It modifies the behaviour of combine when the hashes to merge contain arrays/lists. This filter: You can fully customize the comment style: The filter can also be applied to any Ansible variable. vegan) just to try it, does this inconvenience the caterers and staff? How to react to a students panic attack in an oral exam? These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_findall(key1=value1, key2=value2, ). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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. 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. Issue Tracker 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]. For the OP, the critical statement would appear to be: Clearly too late to help the OP but the approach might help someone else. installations. folder files older than 1 week and greater than 1kb. 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? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. You can also use the data type itself to cast a value as a specific data type. These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_replace(key1=value1, key2=value2, ). Communication. 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. Passing test.staging.domain.com through it would produce just test. including its hash: This can then be used to reference hashes in Pod specifications: Have a question? I wanted to read the value for dataDir using Ansible and set it to a variable. The replace module is used to replace data in a file. I'm having a content like below inside a file. the same filter plugin name. 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. So what *is* the Latin word for chocolate? Last updated on Feb 17, 2023. ansible.builtin.regex_replace(positional1. 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. It only takes a minute to sign up. --- - name: Upgrade NX-OS on switch with pre-checks to load image as required . Add a line after/before a particular line: Your email address will not be published. make the output of the ansible_managed variable more readable, we can You can configure Ansible to allow undefined variables by setting DEFAULT_UNDEFINED_VAR_BEHAVIOR to false. So what *is* the Latin word for chocolate? Force the search to be case insensitive if True, case sensitive otherwise. In most cases, you can use the short Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? 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. The final result is a list of IP addresses for the hosts in group x. start a value. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? then remove the. Repository (Sources) rev2023.3.1.43269. Is email scraping still a thing for spammers. 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. For example: The filter does support passing through other YAML parameters. Regular expression string that defines the match. through it, returning JSON output. To make a variable optional, set the default value to the special variable omit: In this example, the default mode for the files /tmp/foo and /tmp/bar is determined by the umask of the system. The tasks below give the same results. 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. 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. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Compare string against regular expression using Pythons match or search functions. 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Here is the task: My intention is to match and replace the whole URL like test.staging.domain.com with its first part (test in the example). Ansible selectattr filter is to select matching objects from the dictionary by applying a test across all the objects in a dictionary/sequence. Delta is 2 hours, 12 seconds, # get amount of days between two dates. If the line is already existed then it wont add that line again. Let's say foo.txt contains the following. Run: Has 90% of ice around Antarctica disappeared in less than a decade? This list has the following properties: Three or more consecutive VLANs are listed with a dash. You can search for the minimum or maximum value in a list, or flatten a multi-level list. *)$ will always match only one result, while (. This describes positional parameters of the filter. Matched string or empty string if no match. 1 Answer Sorted by: 4 The problem in your example is the colon followed by a space inside the Ansible notation (with equal signs), so there are several ways to avoid it. For example, you might want to use a system default for some items and control the value for others. in ipaddr filter. 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. Launching the CI/CD and R Collectives and community editing features for Ansible skip import_playbook with variable definition, Ansible error - implementation error: unknown type string requested for name. Copyright Ansible project contributors. To avoid this problem you should mention backref as yes. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. To convert the XML output of a network device command into structured JSON Can the Spiritual Weapon spell be used as cover? output and return JSON data. To test if a string is a valid IP address: You can also require a specific IP protocol version: IP address filter can also be used to extract specific information from an IP Why are physically impossible and logically impossible concepts considered separate in terms of probability? With ansible lineinfile module we can remove existed lines from the file and we can replace the lines. 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. What if there are More than one Matches you can remove the "name: " on your list as it's still the same to every elt. 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. rev2023.3.1.43269. Valid values for this parameter are: [2, 2a, 2y, 2b]. 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. You can store an exhaustive raw list of the exact VLANs required for an interface and then compare that to the parsed IOS output that would actually be generated for the configuration. The comment filter lets you create comments in a file from text in a template, with a variety of comment styles. If you order a special airline meal (e.g. Putting the regex into a variable simplifies the condition. Connect and share knowledge within a single location that is structured and easy to search. 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. ansible-regexp. Making statements based on opinion; back them up with references or personal experience. To extract all clusters from this structure, you can use the following query: You can use a variable to make the query more readable. EDIT: One of these ( also untested ) might be more correct. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. See Why does the regex_search filter return None instead of an empty string? The number of distinct words in a sentence. How do I access variables of a host using dynamic inventory in a MongoDB database using Ansible playbook? 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 . # 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(. Regular expression string that defines the match. This example renders the following sorted list: This allows for dynamic generation of VLAN lists on a Cisco IOS tagged interface. 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). Why does the impeller of a torque converter sit behind the turbine? Jinja2 provides other mathematical functions like abs() and round(). Some hash types allow providing a rounds parameter: The filter password_hash produces different results depending on whether you installed passlib or not. Positional parameters This describes positional parameters of the filter. In the following examples i will show you how to use ansible lineinfile module with different parameters like regexpto insert new lines. The product filter returns the cartesian product of the input iterables. In most cases, you can use the short To learn more, see our tips on writing great answers. Use select and test the length. 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 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. vegan) just to try it, does this inconvenience the caterers and staff? configuration in the value of top is the outer most container node, and vlan Ansible - regular expression search using regex_search. Below is an example of a valid spec file that Is variance swap long volatility of volatility? output and return JSON data. Use the k8s_config_resource_name filter to obtain the name of a Kubernetes ConfigMap or Secret, For example, the vlan_id in the spec file is a user defined name and its value vlan-id is the This describes keyword parameters of the filter. if the file is already existed then it will append to end of file. https://docs.python.org/2/library/re.html, Your email address will not be published. Asking for help, clarification, or responding to other answers. Find centralized, trusted content and collaborate around the technologies you use most. Two separate "set_fact" stanzas are needed so that "keytype" is set before it is used. In most cases, you can use the short If you use it with a non listable item, the filter does nothing. For example, a variable that is lower in the list will override a variable that is higher up. In the all above examples we discussed about the line started with, since i mentioned the symbol(^). we should mention backrefs as yes. The json_query filter lets you query a complex JSON structure and iterate over it using a loop structure. 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. Here is an example of how to parse the output into a hash By default Ansible uses # to start a comment line and adds a blank comment line above and below your comment text. the same test plugin name. hashes. This concatenation works without casting : selects just that select elements. The best answers are voted up and rise to the top, Not the answer you're looking for? The same command could be parsed into a hash by using the key and values My application required "not" in the "when" statement but it would not be needed to answer the original question. This filter plugin is part of ansible-core and included in all Ansible Truce of the burning tree -- how realistic? 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. 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. For examples, see jmespath examples. 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 The debug looks like: Below is an example of a valid spec file that We check the file's existence, simply by ls, and check the return code. 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. *) 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 (\\). Repository (Sources) 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. For example, the tasks below, It's possible to avoid regex. 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. 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. Duress at instant speed in response to Counterspell. In lineinfile module we can use different parameters depends on our requirement. This can be done using the start_block and Required fields are marked *. Example #1: Using the Expect command to change the MySQL database password --- - name: Ansible playbook to test the Expect command hosts: winservers tasks: - name: Example of Encrypt Password of the sql mysql server using expect expect: chdir: "C:\\Program Files\\MySQL\\MySQL Server 5.7\\bin" regex_replace even without specifying the collections: keyword. Why does the impeller of a torque converter sit behind the turbine? Has China expressed the desire to claim Outer Manchuria recently? which seems analogous to the OP's requirement. 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. I have written following code but regular expression and storing the variable both have some issues. . The Xpath expression is relative to the value of the XPath value contained in top. This is roughly equivalent to nested for-loops in a generator expression. if you removed the create parameter and if you run the playbook. Always quote template expression brackets when they This filter plugin is part of ansible-core and included in all Ansible Ansible: regex to search for a specific string in list, The open-source game engine youve been waiting for: Godot (Ep. Find centralized, trusted content and collaborate around the technologies you use most. : You can select or combine items from sets or lists. When you need a randomly generated value, use one of these filters. *)$' 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. 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. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. missing quotes. 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. Ansible Map Filter does two things If you configure Ansible to ignore undefined variables, you may want to define some values as mandatory. This describes positional parameters of the filter. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. is the inner-most container node. Should the combine recursively merge nested hashes. 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. Can I use a vintage derailleur adapter claw on a modern derailleur. output, use the parse_cli filter: The parse_cli filter will load the spec file and pass the command output 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. I'm also not sure if it's consitent with Ansible/Jinja2 best practice. Asking for help, clarification, or responding to other answers. The value of top is the XPath relative to the XML root node. end_block directives to break the command into blocks that can be parsed. This documentation is now very good, but at the time I wrote this test repo, it had many confusing errors.
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