ansible regex examples

See the two examples below. The tasks below give the same results. Required fields are marked *. the same filter plugin name. Ansible would report the following error: We could be wrong, but this one looks like it might be an issue with Last updated on Feb 17, 2023. ansible.builtin.regex_replace(positional1. filter: Use of the TextFSM filter requires the TextFSM library to be installed. How to combine multiple named patterns into one Cases? The spec file above will return a JSON data structure that is a list of hashes To extract all clusters from this structure, you can use the following query: You can use a variable to make the query more readable. I have written following code but regular expression and storing the variable both have some issues. Is a boolean, default to False. I wanted to read the value for dataDir using Ansible and set it to a variable. This describes positional parameters of the filter. Here is an example of how to parse the output into a hash Why does the impeller of a torque converter sit behind the turbine? 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 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. 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. *)$ will always match only one result, while (. directives. This filter has migrated to the community.general collection. end_block directives to break the command into blocks that can be parsed. hashes. Though it works for one line - Is this ok [y/N]: y. Regex that I have used for both lines is Installed . I'm having a content like below inside a file. In most cases, you can use the short 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. To learn more, see our tips on writing great answers. if the file is already existed then it will append to end of file. *) 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 (\\). How do I specify a regex to search for the string name: bob - note that this should not match with name: bobby. 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. 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. This describes the input of the filter, the value before | ansible.builtin.regex_findall. Why does the regex_search filter return None instead of an empty string? Issue Tracker 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Story Identification: Nanomachines Building Cities. Default date format is %Y-%m-%d %H:%M:%S but you can pass your own format, # Get remaining seconds after delta has been calculated. Can I use a vintage derailleur adapter claw on a modern derailleur. 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. Search across line endings if True, do not if otherwise. Making statements based on opinion; back them up with references or personal experience. that means the line started with docker has to modify with the line hello devops in the file. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? The return value of b64decode is a string. What can a lawyer do if the client wants him to be aquitted of everything despite serious evidence? into blocks that can be parsed. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Connect and share knowledge within a single location that is structured and easy to search. 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. 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. Jordan's line about intimate parties in The Great Gatsby? This describes keyword parameters of the filter. For example, a registered variable might contain a dictionary when your next task needs a list, or a user prompt might return a string when your playbook needs a boolean value. 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 Here is the example playbook with the regular expression pattern . Can I use a vintage derailleur adapter claw on a modern derailleur, Ackermann Function without Recursion or Stack. 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. Force the search to be case insensitive if True, case sensitive otherwise. through formatted as JSON. Input This describes the input of the filter, the value before | ansible.builtin.regex_search. How can I match "anything up until this sequence of characters" in a regular expression? This test plugin is part of ansible-core and included in all Ansible I've tried using ^ and $ to indicate start of string, end of string, but it's not working. 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. 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 In the following examples i will show you how to use ansible lineinfile module with different parameters like regexpto insert new lines. The main goal of the cooperative is striving to become a center of excellence and a reference point for software development. => {changed: false, msg: Destination /project/devops/abc.txt does not exist !, rc: 257}. Is a string, its possible values are replace (default), keep, append, prepend, append_rp or prepend_rp. Follow the installation instructions to install that collection. 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. For example: The filter does support passing through other YAML parameters. Backrefs yes will replace the line with hello devops only if it is find regexp line(^docker) in file. To add the line to the file, we should mention state parameter as present. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. output, use the parse_cli filter: The parse_cli filter will load the spec file and pass the command output EDIT: One of these ( also untested ) might be more correct. ", # => "$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]+)'. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Copyright Ansible project contributors. rev2023.3.1.43269. 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. Decide which function to be used to do the matching. Let us discuss examples of Ansible Expect. The product filter returns the cartesian product of the input iterables. Issue Tracker plugin name 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 example, the vlan_id in the spec file is a user defined name and its value vlan-id is the Thanks for contributing an answer to Server Fault! The number of distinct words in a sentence. For example, map from_yaml, create a list of dictionaries, and selectattr. Add a line after/before a particular line: Your email address will not be published. Jinja2 provides other mathematical functions like abs() and round(). Without that filter before b64encode the wrong value will be encoded. How to react to a students panic attack in an oral exam? This lets you specify individual subelements to use in a template. The YAML spec file defines how to parse the CLI output. If you configure Ansible to ignore most undefined variables, you can mark some variables as requiring values with the mandatory filter. The first line of the list can be first_line_len characters long. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? 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. 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. The from_yaml_all filter will return a generator of parsed YAML documents. 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. You can configure Ansible to allow undefined variables by setting DEFAULT_UNDEFINED_VAR_BEHAVIOR to false. *)$' to '\^f\.\*o$\.\*$\$', # convert '^f.*o(. regex_replace even without specifying the collections: keyword. This means that you can now simply use Dot product of vector with camera's local positive x-axis? Configuration entries for each entry type have a low to high priority order. 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. You can also use the data type itself to cast a value as a specific data type. 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. How can I set an Ansible variable depending on hostname? However, you can make specific variables optional. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. These filters have migrated to the ansible.netcommon collection. Positional parameters This describes positional parameters of the filter. You can also use the Ansible vault filter to encrypt data: And then decrypt it using the unvault filter: Several filters work with text, including URLs, file names, and path names. then remove the. Asking for help, clarification, or responding to other answers. (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 regex_search even without specifying the collections: keyword. Thanks so much. 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. vegan) just to try it, does this inconvenience the caterers and staff? Search in a string or extract all the parts of a string matching a regular expression. Updated on: January 1, 2022 Sarav AK. In most cases, you can use the short UPDATE 10/2022: See further explanations/answers in story responses! 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. Communication. In most cases, you can use the short To review, open the file in an editor that reveals hidden Unicode characters. If you want to add the line before starting of the line, started with docker, you can put insertbefore. Asking for help, clarification, or responding to other answers. Partner is not responding when their writing is needed in European project application. 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 . Subsequent list lines can be other_line_len characters. Can the Spiritual Weapon spell be used as cover? This filter can be used to generate a random MAC address from a string prefix. 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. --- - name: Upgrade NX-OS on switch with pre-checks to load image as required . If the line is already existed then it wont add that line again. 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! To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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. Compare string against regular expression using Pythons match or search functions. relative to the value of XPath in top. 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: "". To remove the line by using regexp in ansible we should use state parameter as absent. Connect and share knowledge within a single location that is structured and easy to search. Ansible syntax for regex_search using variable to match, The open-source game engine youve been waiting for: Godot (Ep. In the all above examples we discussed about the line started with, since i mentioned the symbol(^). To learn more, see our tips on writing great answers. rev2023.3.1.43269. 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. If you want to configure the names of the keys, the dict2items filter accepts 2 keyword arguments. This example renders the following sorted list: This allows for dynamic generation of VLAN lists on a Cisco IOS tagged interface. Filters can help you manage missing or undefined variables by providing defaults or making some variables optional. Here is an example of how to parse the output into a hash Follow the installation instructions to install that collection. These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_search(positional1, positional2, ). 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. Use the k8s_config_resource_name filter to obtain the name of a Kubernetes ConfigMap or Secret, To convert the XML output of a network device command into structured JSON By default, Ansible fails if a variable in your playbook or command is undefined. Let's say foo.txt contains the following. The final result is a list of IP addresses for the hosts in group x. That causes unexpected line break after 80th symbol (if there is a space after 80th symbol) Not all lists use key to designate keys and value to designate values. installations. This set of filters returns a list of combined lists. Another common use case for parsing CLI commands is to break a large command Incomplete \ifodd; all text was ignored after line. The spec file should be valid formatted YAML. 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. directives. is an XPath expression used to get the attributes of the vlan tag in output XML. as in example? 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). A convenient way of requiring a variable to be overridden is to give it an undefined value using the undef keyword. If you are working within a role, you can also add a defaults/main.yml to define the default values for variables in your role. Would the reflected sun's radiation melt ice in LEO? To get a random number between 0 (inclusive) and a specified integer (exclusive): To get a random number from 0 to 100 but in steps of 10: To get a random number from 1 to 100 but in steps of 10: You can initialize the random number generator from a seed to create random-but-idempotent numbers: The shuffle filter randomizes an existing list, giving a different order every invocation. the same test plugin name. You can search for the minimum or maximum value in a list, or flatten a multi-level list. Ansible selectattr filter is basically an inherited version of Jinja selectattr filter. https://docs.python.org/2/library/re.html, Your email address will not be published. This is due to historic behavior and the custom re-implementation of some of the Jinja internals in Ansible. Is email scraping still a thing for spammers. Learn more about Stack Overflow the company, and our products. plugin name For example, a variable that is lower in the list will override a variable that is higher up. plugin documentation and to avoid conflicting with other collections that may have folder files older than 1 week and greater than 1kb. 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. Ansible regex with assert operator. 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). With ansible lineinfile module we can remove existed lines from the file and we can replace the lines. Ansible playbook - does include_role and delegate_to work together. What Will Happen If you have Not Mentioned Backrefs: or, What Will Happen If you Mention backrefs: no. These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_findall(key1=value1, key2=value2, ). 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. Let's say foo.txt contains the following. 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. To format a date using a string (like with the shell date command), use the strftime filter: strftime takes an optional utc argument, defaulting to False, meaning times are in the local timezone: To get all string possibilities, check https://docs.python.org/3/library/time.html#time.strftime. To learn more, see our tips on writing great answers. configuration in the value of top is the outer most container node, and vlan By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. What is the syntax within the regex_search() to match against a variable? To escape special characters within a standard Python regex, use the regex_escape filter (using the default re_type='python' option): To escape special characters within a POSIX basic regex, use the regex_escape filter with the re_type='posix_basic' option: To get the last name of a file path, like foo.txt out of /etc/asdf/foo.txt: To get the last name of a windows style file path (new in version 2.0): To separate the windows drive letter from the rest of a file path (new in version 2.0): To get the rest of the path without the drive letter: To get the directory from a windows path (new version 2.0): To expand a path containing a tilde (~) character (new in version 1.5): To expand a path containing environment variables: expandvars expands local variables; using it on remote paths can lead to errors. Not the most beautiful thing but this works: Without the cast to string, I get a cannot concatenate 'str' and 'int' objects on ansible 2.2.0.0 and I don't have time to update just now. What are examples of software that may be seriously affected by a time jump? Putting a regex into a variable simplifies the expressions. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Match literals with 'regex_replace' Ansible filter, The open-source game engine youve been waiting for: Godot (Ep. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. and input is not ansible.builtin.regex (key1=value1, key2=value2, .). The first capturing group extracts the first part of the URL until the first dot, the whole regex captures the whole URL. Putting the regex into a variable simplifies the condition. Is a hot staple gun good enough for interior switch repair? How do I access variables of a host using dynamic inventory in a MongoDB database using Ansible playbook? Repository (Sources) Replace a substring defined by a regular expression with another defined by another regular expression based on the first match. 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? : You can select or combine items from sets or lists. Are there conventions to indicate a new item in a list? This describes positional parameters of the filter. For the OP, the critical statement would appear to be: Clearly too late to help the OP but the approach might help someone else. for details. ansible-playbook register_multiple_variable.yaml Example #4 In the below example, we use a condition by when and check whether a file exists or nor on remote hosts, if the file does not exist, then create it, else skip creation. I'm also not sure if it's consitent with Ansible/Jinja2 best practice. Issue Tracker This is driving me crazy as to the correct format for the test condition. After I've found Use Jinja match filter instead of regex_match It defines how to parse the XML These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_search(key1=value1, key2=value2, ). items is a dictionary of key-value pairs that map user-defined names to XPath expressions 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 the following: Ansible offers styles for comments in C (//), C block Should the combine recursively merge nested hashes. The example above will parse the output of show interface into a list of 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. Follow the installation instructions to install that collection. {name: "domain.server[?starts_with(name,'server1')].port", "domain.server[?contains(name,'server1')].port", "^(?P\\d+)\\s+(?P\\w+)\\s+(?Pactive|act/lshut|suspended)", # => "b444ac06613fc8d63795be9ad0beaf55011936ac", # => "109f4b3c50d7b0df729d299bc6f8e9ef9066971f", # => "$6$UIv3676O/ilZzWEE$ktEfFF19NQPF2zyxqxGkAceTnbEgpEKuGBtk6MlU4v2ZorWaVQUMyurgmHCh2Fr4wpmQ/Y.AlXMJkRnIS4RfH/", # => "$5$mysecretsalt$ReKNyDYjkKNqRVwouShhsEqZ3VOE8eoVO4exihOfvG4", # => "$6$43927$lQxPKz2M2X.NWO.gK.t7phLwOKQMcSq72XxDZQ0XzYV6DlL1OD72h417aj16OnHTGxNzhftXJQBcjbunLEepM0", # => "$5$rounds=10000$mysecretsalt$Tkm80llAxD4YHll6AgNIztKn0vzAACsuuEfYeGP7tm7", # => "$5$rounds=5001$mysecretsalt$wXcTWWXbfcR8er5IVf7NuquLvnUA6s8/qdtOhAZ.xN.
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