ansible regex examples
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This filter plugin is part of ansible-core and included in all Ansible Asking for help, clarification, or responding to other answers. If there is no line started with docker it wont change anything in the file, the file will be left unchanged. Find centralized, trusted content and collaborate around the technologies you use most. How can I save in Ansible variable the output from a bash command? How can I set an Ansible variable depending on hostname? GitHub Instantly share code, notes, and snippets. 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. However, we recommend you use the FQCN for easy linking to the I wanted to read the value for dataDir using Ansible and set it to a variable. If you configure Ansible to ignore most undefined variables, you can mark some variables as requiring values with the mandatory filter. See the two examples below. 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 . 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. 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). 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. Why are physically impossible and logically impossible concepts considered separate in terms of probability? Follow the installation instructions to install that collection. Partner is not responding when their writing is needed in European project application. Always quote template expression brackets when they 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. Truce of the burning tree -- how realistic? RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? 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. Here it will remove the line started with docker. We check the file's existence, simply by ls, and check the return code. to search element on list, use the select attribute. 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. Valid values for this parameter are: [2, 2a, 2y, 2b]. is there a chinese version of ex. rev2023.3.1.43269. I've added examples. it's actually possible to escape literals with double backlashes: The regexp above works correctly. In the following examples i will show you how to use ansible lineinfile module with different parameters like regexpto insert new lines. Let us discuss examples of Ansible Expect. Has 90% of ice around Antarctica disappeared in less than a decade? 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. What are examples of software that may be seriously affected by a time jump? This describes positional parameters of the filter. How do I access variables of a host using dynamic inventory in a MongoDB database using Ansible playbook? will parse the output from the show vlan | display xml command. It only takes a minute to sign up. plugin name For example, a variable that is lower in the list will override a variable that is higher up. Making statements based on opinion; back them up with references or personal experience. into blocks that can be parsed. How to combine multiple named patterns into one Cases? 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. make the output of the ansible_managed variable more readable, we can plugin documentation and to avoid conflicting with other collections that may have Ansible Map Filter does two things To learn more, see our tips on writing great answers. /etc/ssh/ssh_host_ed25519_key In the all above examples we discussed about the line started with, since i mentioned the symbol(^). How do I fit an e-hub motor axle that is too big? This test plugin is part of ansible-core and included in all Ansible the same filter plugin name. it will create new file and it will add the line to file. This describes keyword parameters of the test. Here is an example of how to parse the output into a hash 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 Configuration entries for each entry type have a low to high priority order. These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_replace(key1=value1, key2=value2, ). Result: . It only takes a minute to sign up. If you are unsure of the underlying Python type of a variable, you can use the type_debug filter to display it. This means that you can now simply use "{{ foo | default(None) | some_filter or omit }}". The best answers are voted up and rise to the top, Not the answer you're looking for? To convert the XML output of a network device command into structured JSON If recursive=False (the default), nested hash arent merged: If recursive=True, recurse into nested hash and merge their keys: If list_merge='replace' (the default), arrays from the right hash will replace the ones in the left hash: If list_merge='keep', arrays from the left hash will be kept: If list_merge='append', arrays from the right hash will be appended to the ones in the left hash: If list_merge='prepend', arrays from the right hash will be prepended to the ones in the left hash: If list_merge='append_rp', arrays from the right hash will be appended to the ones in the left hash. In this example, Hello is replaced with Goodbye. This is driving me crazy as to the correct format for the test condition. Has 90% of ice around Antarctica disappeared in less than a decade? To learn more, see our tips on writing great answers. end_block directives to break the command into blocks that can be parsed. This describes the input of the filter, the value before | ansible.builtin.regex_findall. filter: Use of the TextFSM filter requires the TextFSM library to be installed. NOTE: This does NOT convert years, days, hours, and so on to seconds. 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: 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 can switch a data structure in a template from or to JSON or YAML format, with options for formatting, indenting, and loading data. You can also use the data type itself to cast a value as a specific data type. relative to the value of XPath in top. 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. Another common use case for parsing CLI commands is to break a large command is the inner-most container node. This describes positional parameters of the filter. 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. Stop by the google group! How can I improve the regular expression to get only /var/lib/zookeeper ? Jordan's line about intimate parties in The Great Gatsby? Not the answer you're looking for? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This is roughly equivalent to nested for-loops in a generator expression. Duress at instant speed in response to Counterspell. Follow the installation instructions to install that collection. regex_search even without specifying the collections: keyword. 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. Connect and share knowledge within a single location that is structured and easy to search. we should mention backrefs as yes. output and return JSON data. What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? The individual components can be accessed by using the first and last filters: As of version 2.6, you can define the type of encoding to use, the default is utf-8: The string filter is only required for Python 2 and ensures that text to encode is a unicode string. 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. Regexp is used to modify the particular line in the file. Let's say foo.txt contains the following. 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. 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. and input is not ansible.builtin.regex (key1=value1, key2=value2, .). Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. To learn more, see our tips on writing great answers. 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. Is variance swap long volatility of volatility? Examples Return Value Synopsis Search in a string to extract the part that matches the regular expression. The product filter returns the cartesian product of the input iterables. Ansible would report the following error: We could be wrong, but this one looks like it might be an issue with "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. sorted string list of integers according to IOS-like VLAN list rules. 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. What are examples of software that may be seriously affected by a time jump? Dot product of vector with camera's local positive x-axis? the same filter plugin name. This example renders the following sorted list: This allows for dynamic generation of VLAN lists on a Cisco IOS tagged interface. So what *is* the Latin word for chocolate? This filter has migrated to the community.general collection. Would the reflected sun's radiation melt ice in LEO? 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. These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_search(key1=value1, key2=value2, ). A convenient way of requiring a variable to be overridden is to give it an undefined value using the undef keyword. Note: It does not depend on the value of the hash_behaviour setting in ansible.cfg. For example, Collon ":" isn't Python regex special character. Communication. Q1.) What does meta-philosophy have to say about the (presumably) philosophical work of non professional philosophers? In that case, you may want to require some variables to be defined. To review, open the file in an editor that reveals hidden Unicode characters. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. Ansible selectattr filter is basically an inherited version of Jinja selectattr filter. Ansible Architecture-Ansible Architecture PPT. hashes. For below, vcsourcekit = 10, I want to match regex ^10. Ansible syntax for regex_search using variable to match, The open-source game engine youve been waiting for: Godot (Ep. Why does the impeller of a torque converter sit behind the turbine? Putting the regex into a variable simplifies the condition. 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 . 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. :) I noticed that if I use the expression in a when clause then I need to place parentheses around the colon. Raw regex_test.yml --- ## Example of use of filter regex_search - hosts: localhost A Playbook with Ansible Find - to find files with regular expression 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. In most cases, you can use the short Regular expression string that defines the replacement. See Why does the regex_search filter return None instead of an empty string? through formatted as JSON. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. This can be done using the start_block and 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: Delta is 2 hours, 12 seconds, # get amount of days between two dates. Search in a string or extract all the parts of a string matching a regular expression. 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. Is email scraping still a thing for spammers. Repository (Sources) Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Thanks so much. If you order a special airline meal (e.g. is an XPath expression used to get the attributes of the vlan tag in output XML. The code works in Ansible 2.4.3.0 running on Debian 9 (Raspbian "Stretch"). Updated on: January 1, 2022 Sarav AK. To avoid this problem you should mention backref as yes. configuration in the value of top is the outer most container node, and vlan Code: --- - name: Ansible playbook to use the find files on the Unix servers hosts: linuxservers tasks: - name: Search the file from the /tmp directories find: paths: /etc recurse: yes age: 1w size: 1k Last updated on Feb 17, 2023. Making statements based on opinion; back them up with references or personal experience. Thanks for contributing an answer to Stack Overflow! you can remove the "name: " on your list as it's still the same to every elt. The final result is a list of IP addresses for the hosts in group x. For example, map from_yaml, create a list of dictionaries, and selectattr. If you use it with a non listable item, the filter does nothing. Below is an example of a valid spec file that For example: shell: cmd="base64 --decode > myfile.bin" stdin="{{ encoded }}". In the example XML output given below, the value of top is configuration/vlans/vlan, Positional parameters This describes positional parameters of the filter. By default, Ansible fails if a variable in your playbook or command is undefined. Why does the impeller of a torque converter sit behind the turbine? 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. if the file is already existed then it will append to end of file. Search in a string to extract the part that matches the regular expression. Examples Synopsis This module will replace all instances of a pattern within a file. 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. For example, you might want to use a system default for some items and control the value for others. Run: Not the answer you're looking for? Input This describes the input of the filter, the value before | ansible.builtin.regex_replace. 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: "". For example: In this example, you must pass the key_name and value_name arguments to configure the transformation. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, ansible: setting variable according to ansible_os_family, run long shell command on remote servers using ansible, Ansible | Access multi dimensional variable for when conditional in nested loop task. Why does the impeller of a torque converter sit behind the turbine? This describes the input of the filter, the value before | ansible.builtin.regex_search. 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. In most cases, you can use the short Regular expression string that defines the match. 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. Regular expression string that defines the match. This is due to historic behavior and the custom re-implementation of some of the Jinja internals in Ansible. To remove the line by using regexp in ansible we should use state parameter as absent. To add the line to the file, we should mention state parameter as present. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? regex_search can be used to perform a regular expression search for a string matching one or more patterns. Here we mentioned in the regexp parameter as ^devops. Communication. vegan) just to try it, does this inconvenience the caterers and staff? will parse the output from the show vlan command. It is up to the user to maintain idempotence by ensuring that the same pattern would never match any replacements made. rev2023.3.1.43269. These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_search(positional1, positional2, ). was trying to match this pattern (both lines) but my script fails. That causes unexpected line break after 80th symbol (if there is a space after 80th symbol) How did StorageTek STC 4305 use backing HDDs? through it, returning JSON output. With ansible lineinfile module we can remove existed lines from the file and we can replace the lines. 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]. Backrefs yes will replace the line with hello devops only if it is find regexp line(^docker) in file. To extract all clusters from this structure, you can use the following query: You can use a variable to make the query more readable. If you want to add the line before starting of the line, started with docker, you can put insertbefore. The debug looks like: Examples Return Value Synopsis Search in a string or extract all the parts of a string matching a regular expression. 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. The tasks below give the same results. Vladimir to the rescue as always. Jinja2 provides other mathematical functions like abs() and round(). Asking for help, clarification, or responding to other answers. "domain.server[?cluster=='cluster2']. regex_findall even without specifying the collections: keyword. 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! The json_query filter lets you query a complex JSON structure and iterate over it using a loop structure. Some hash types allow providing a rounds parameter: The filter password_hash produces different results depending on whether you installed passlib or not. {name: "domain.server[?starts_with(name,'server1')].port", "domain.server[?contains(name,'server1')].port", "^(?P
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