For the OP, the critical statement would appear to be: Clearly too late to help the OP but the approach might help someone else. Not the answer you're looking for? ansible-regexp. The from_yaml_all filter will return a generator of parsed YAML documents. Here it will remove the line started with docker. These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_replace(positional1, positional2, ). Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? How can I improve the regular expression to get only /var/lib/zookeeper ? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. will parse the output from the show vlan | display xml command. 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 describes keyword parameters of the filter. (.+)$', '\\1') }}_stg" The regexp above works correctly. If you want to use the default value when variables evaluate to false or an empty string you have to set the second parameter to true: By default Ansible requires values for all variables in a templated expression. Delta is 2 hours, 12 seconds, # get amount of days between two dates. This describes keyword parameters of the test. 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. Below is an example of a valid spec file that Use the vlan_parser filter to transform an unsorted list of VLAN integers into a It seems that "match" requires a pattern that matches the whole string, hence the *. I was trying to use expect with Ansible to automate package installation (in below example - uninstall). The spec file above will return a JSON data structure that is a list of hashes 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. This can be done using the start_block and Putting the regex into a variable simplifies the condition. These filters help you with common network tasks. Ansible does not send a value for mode. vegan) just to try it, does this inconvenience the caterers and staff? The replace module is used to replace data in a file. (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 This describes positional parameters of the filter. Let's say foo.txt contains the following. is the inner-most container node. with the parsed VLAN information. i'm trying to use regex_search to match only the Software Version : v22.1.1 line. You're welcome. is there a chinese version of ex. regex_replace even without specifying the collections: keyword. If you order a special airline meal (e.g. Communication. the same filter plugin name. Does Cast a Spell make you a spellcaster? To avoid such behavior and generate long lines, use the width option. What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? 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. Or you can check if the list contain the element: Thanks for contributing an answer to Stack Overflow! To convert the XML output of a network device command into structured JSON 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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Putting a regex into a variable simplifies the expressions. Last updated on Feb 17, 2023. ansible.builtin.regex_findall(positional1. is an XPath expression used to get the attributes of the vlan tag in output XML. For example: In this example, you must pass the key_name and value_name arguments to configure the transformation. This describes keyword parameters of the filter. Ansible Lineinfile With Regexp Example: --- - hosts: localhost gather_facts: no tasks: - name: Ansible check directory. To add the line to the file, we should mention state parameter as present. Not all lists use key to designate keys and value to designate values. If the line is already existed then it wont add that line again. Also the colon is causing the following error: syntax error - mapping values are not allowed in this context. You can also use Python methods to transform data. Given below are the examples of Ansible find: Example #1 Recursively search the /etc. To learn more, see our tips on writing great answers. rev2023.3.1.43269. To avoid this problem you should mention backref as yes. through it, returning JSON output. Why are physically impossible and logically impossible concepts considered separate in terms of probability? Positional parameters This describes positional parameters of the filter. Thanks for contributing an answer to Server Fault! 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. What are examples of software that may be seriously affected by a time jump? Truce of the burning tree -- how realistic? 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. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. (/**/), Erlang (%) and XML (): You can define a custom comment character. EDIT: One of these ( also untested ) might be more correct. This is due to historic behavior and the custom re-implementation of some of the Jinja internals in Ansible. rev2023.3.1.43269. It only takes a minute to sign up. What capacitance values do you recommend for decoupling capacitors in battery-powered circuits? In the example XML output given below, the value of top is configuration/vlans/vlan, See the two examples below. If you run the playbook multiple times, the line will be added taht number of times. This filter plugin is part of ansible-core and included in all Ansible 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. This test plugin is part of ansible-core and included in all Ansible This means that you can now simply use You can provide default values for variables directly in your templates using the Jinja2 default filter. It defines how to parse the XML The json_query filter lets you query a complex JSON structure and iterate over it using a loop structure. 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. missing quotes. Decide which function to be used to do the matching. We check the file's existence, simply by ls, and check the return code. It doesn't evaluate the variable, rather interprets literally. vegan) just to try it, does this inconvenience the caterers and staff? 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. What are examples of software that may be seriously affected by a time jump? Only the third file, /tmp/baz, receives the mode=0444 option. Repository (Sources) regex even without specifying the collections: keyword. To get a list combining the elements of other lists use zip: To always exhaust all lists use zip_longest: Similarly to the output of the items2dict filter mentioned above, these filters can be used to construct a dict: List data (before applying the zip filter): Dictionary data (after applying the zip filter): The subelements filter produces a product of an object and the subelement values of that object, similar to the subelements lookup. The number of distinct words in a sentence. "domain.server[?cluster=='cluster2']. 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. How to derive the state of a qubit after a partial measurement? Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, Ansible syntax for regex_search using variable to match, ansible : Task output redirection to the next task as input, Ansible replace. Is a hot staple gun good enough for interior switch repair? Is email scraping still a thing for spammers. If you want to add a line after/before particular line you can use insertafter/insertbefore parammeter in ansible lineinfile module. :) I noticed that if I use the expression in a when clause then I need to place parentheses around the colon. 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. into blocks that can be parsed. The YAML spec file defines how to parse the CLI output. Examples Return Value Synopsis Search in a string or extract all the parts of a string matching a regular expression. which seems analogous to the OP's requirement. The same command could be parsed into a hash by using the key and values Let's say foo.txt contains the following. These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_replace(key1=value1, key2=value2, ). that means the line started with docker has to modify with the line hello devops in the file. Compare string against regular expression using Pythons match or search functions. String with substitution (or original if no match). the same filter plugin name. 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. Configuration entries for each entry type have a low to high priority order. GitHub Instantly share code, notes, and snippets. Server Fault is a question and answer site for system and network administrators. The network filters also support parsing the output of a CLI command using the For example, a variable that is lower in the list will override a variable that is higher up. So what *is* the Latin word for chocolate? Filters can help you manage missing or undefined variables by providing defaults or making some variables optional. In this example, Hello is replaced with Goodbye. which is an XPath expression relative to the root node (). You can cast values as certain types. You can also use the data type itself to cast a value as a specific data type. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? that select elements. Always quote template expression brackets when they Is variance swap long volatility of volatility? Configuration entries for each entry type have a low to high priority order. Making statements based on opinion; back them up with references or personal experience. Would it Replace all the Matching Lines? output, use the parse_xml filter: The parse_xml filter will load the spec file and pass the command output Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. 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 . 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. These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_findall(positional1, positional2, ). What if there are More than one Matches You must manually install the jmespath dependency on the Ansible controller before using this filter. Search across line endings if True, do not if otherwise. Is a string, its possible values are replace (default), keep, append, prepend, append_rp or prepend_rp. address. for details. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I've added examples. 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. TextFSM library. 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. : You can select or combine items from sets or lists. For example to end_block directives to break the command into blocks that can be parsed. The first capturing group extracts the first part of the URL until the first dot, the whole regex captures the whole URL. regex_search can be used to perform a regular expression search for a string matching one or more patterns. Thank you! How did StorageTek STC 4305 use backing HDDs? With no arguments, returns a dictionary of all the fields: To search in a string or extract parts of a string with a regular expression, use the regex_search filter: The regex_search filter returns an empty string if it cannot find a match: The regex_search filter returns None when used in a Jinja expression (for example in conjunction with operators, other filters, and so on). Input This describes the input of the filter, the value before | ansible.builtin.regex_search. 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). 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. Matched string or empty string if no match. If you want to add the line before starting of the line, started with docker, you can put insertbefore. make the output of the ansible_managed variable more readable, we can It's not necessary to escape it. Server Fault is a question and answer site for system and network administrators. To learn more, see our tips on writing great answers. Not the answer you're looking for? Copyright Ansible project contributors. regex_findall even without specifying the collections: keyword. Here we mentioned in the regexp parameter as ^devops. relative to the value of XPath in top. Other hash types will simply ignore this parameter. For example ^(. In the following examples i will show you how to use ansible lineinfile module with different parameters like regexpto insert new lines. Why does the impeller of a torque converter sit behind the turbine? Escaping single quotes within single quotes in YAML is done by doubling the single quote. Copyright Ansible project contributors. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? Should the combine recursively merge nested hashes. start a value. plugin documentation and to avoid conflicting with other collections that may have By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Ansible playbook - does include_role and delegate_to work together. The example above will parse the output of show interface into a list of Regexp is used to modify the particular line in the file. Q1.) These are the values key1=value1, key2=value2 and so on in the following examples: input is ansible.builtin.regex (key1=value1, key2=value2, .) This describes keyword parameters of the filter. My advice is to use YAML syntax: tasks: - replace: dest: ./src regexp: 'app_name:\s [A-Za-z0-9 ]*' replace: 'app_name: { { node }}' to search element on list, use the select attribute. Issue Tracker The number of distinct words in a sentence. Passing test.staging.domain.com through it would produce just test. Q2.) 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. then remove the. 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. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? For example, the tasks below, It's possible to avoid regex. For example, you might want to use a system default for some items and control the value for others. Raw regex_test.yml --- ## Example of use of filter regex_search - hosts: localhost Ansible - regular expression search using regex_findall. How do I fit an e-hub motor axle that is too big? I have the following playbook that is trying to assert that a user prompt variable of NX-OS image equals the ansible_net_image captured from a Nexus switch. Is there a proper earth ground point in this switch box? Ansible Architecture-Ansible Architecture PPT. If you configure Ansible to ignore most undefined variables, you can mark some variables as requiring values with the mandatory filter. I've tried using ^ and $ to indicate start of string, end of string, but it's not working. Regular expression string that defines the match. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. How did StorageTek STC 4305 use backing HDDs? Regular expression string that defines the match. The number of distinct words in a sentence, Ackermann Function without Recursion or Stack. How do I access variables of a host using dynamic inventory in a MongoDB database using Ansible playbook? directives. 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. Copyright Ansible project contributors. I cannot find a way to much a literal (a dot) in Ansible's regex_replace filter. 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. These filters have migrated to the kubernetes.core collection. You can search for the minimum or maximum value in a list, or flatten a multi-level list. 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. configuration in the value of top is the outer most container node, and vlan The spec file should be valid formatted YAML. This lets you specify individual subelements to use in a template. 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. Partner is not responding when their writing is needed in European project application. Examples url: "https://example.com/users/foo/resources/bar" foundmatch: url is regex ("example\.com/\w+/foo") Return Value Authors 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 Asking for help, clarification, or responding to other answers. Ansible lineinfile module is used to insert new lines at the end of the file or anywhere in the file. Search in a string or extract all the parts of a string matching a regular expression. you can remove the "name: " on your list as it's still the same to every elt. ", # => "$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]+)'. Connect and share knowledge within a single location that is structured and easy to search. 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. However, we recommend you use the FQCN for easy linking to the Pass the key_name and value_name arguments to configure the names of the keys in the list output: Use the items2dict filter to transform a list into a dictionary, mapping the content into key: value pairs: List data (before applying the items2dict filter): Dictionary data (after applying the items2dict filter): The items2dict filter is the reverse of the dict2items filter. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Do EMC test houses typically accept copper foil in EUT? It only takes a minute to sign up. I have a list of strings called somelist as shown below. Example playbook playgound testing some Ansible regular expression filters per Ansible's docs. installations. In that case, you may want to require some variables to be defined. However, we recommend you use the FQCN for easy linking to the Learn more about Stack Overflow the company, and our products. as in example? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Find centralized, trusted content and collaborate around the technologies you use most. Jordan's line about intimate parties in The Great Gatsby? 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. Find a vector in the null space of a large dense matrix, where elements in the matrix are not directly accessible. regex_findall can be used to perform a regular expression search for a string matching one or more patterns. 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. Let us discuss examples of Ansible Expect. items is a dictionary of key-value pairs that map user-defined names to XPath expressions 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.

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