Learn more about Stack Overflow the company, and our products. Positional parameters This describes positional parameters of the filter. This filter plugin is part of ansible-core and included in all Ansible Last updated on Feb 17, 2023. ansible.builtin.regex_search(positional1. The parameter is only available for blowfish (BCrypt). How did StorageTek STC 4305 use backing HDDs? Server Fault is a question and answer site for system and network administrators. Does Cast a Spell make you a spellcaster? Story Identification: Nanomachines Building Cities. The final result is a list of IP addresses for the hosts in group x. 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. Repository (Sources) Always quote template expression brackets when they Force the search to be case insensitive if True, case sensitive otherwise. (/**/), Erlang (%) and XML (): You can define a custom comment character. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_findall(positional1, positional2, ). This can be done using the start_block and To parse the CLI output with TextFSM use the following : You can select or combine items from sets or lists. Ansible selectattr Example - Filter dictionary and select matching item. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If you use it with a non listable item, the filter does nothing. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The spec file should be valid formatted YAML. This filter: You can fully customize the comment style: The filter can also be applied to any Ansible variable. 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]. 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 This symbol represents the line starting with, if you want to know more different options you should learn python regexp. regex_findall even without specifying the collections: keyword. Why are physically impossible and logically impossible concepts considered separate in terms of probability? By default Ansible uses # to start a comment line and adds a blank comment line above and below your comment text. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Regular expression string that defines the match. Though it works for one line - Is this ok [y/N]: y. Regex that I have used for both lines is Installed . Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. How do I specify a regex to search for the string name: bob - note that this should not match with name: bobby. However, you can make specific variables optional. Follow the installation instructions to install that collection. rev2023.3.1.43269. To get a random list from an existing list: You can initialize the shuffle generator from a seed to generate a random-but-idempotent order: The shuffle filter returns a list whenever possible. These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_replace(positional1, positional2, ). Thanks so much. end_block directives to break the command into blocks that can be parsed. That causes unexpected line break after 80th symbol (if there is a space after 80th symbol) then remove the. The debug looks like: 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. # 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(. You can create custom Ansible filters as plugins, though we generally welcome new filters into the ansible-core repo so everyone can use them. To learn more, see our tips on writing great answers. So what *is* the Latin word for chocolate? Making statements based on opinion; back them up with references or personal experience. Server Fault is a question and answer site for system and network administrators. These are the values key1=value1, key2=value2 and so on in the following examples: input is ansible.builtin.regex (key1=value1, key2=value2, .) Making statements based on opinion; back them up with references or personal experience. --- - name: Upgrade NX-OS on switch with pre-checks to load image as required . Copyright Ansible project contributors. Because templating happens on the Ansible controller, not on the target host, filters execute on the controller and transform data locally. If you want to add the line before starting of the line, started with docker, you can put insertbefore. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? It only takes a minute to sign up. How can I improve the regular expression to get only /var/lib/zookeeper ? rev2023.3.1.43269. In this example, Hello is replaced with Goodbye. 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. Incomplete \ifodd; all text was ignored after line. Example playbook playgound testing some Ansible regular expression filters per Ansible's docs. Refresh the page, check Medium. How do I access variables of a host using dynamic inventory in a MongoDB database using Ansible playbook? 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 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. Search across line endings if True, do not if otherwise. output, use the parse_cli filter: The parse_cli filter will load the spec file and pass the command output Examples url: "https://example.com/users/foo/resources/bar" foundmatch: url is regex ("example\.com/\w+/foo") Return Value Authors You can link here as a reference. Should the combine recursively merge nested hashes. A Playbook with Ansible Find - to find files with regular expression Partner is not responding when their writing is needed in European project application. In most cases, you can use the short For example, map from_yaml, create a list of dictionaries, and selectattr. 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. Not all lists use key to designate keys and value to designate values. 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. plugin documentation and to avoid conflicting with other collections that may have Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? as in example? 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: Defining different values for true/false/null (ternary), Combining items from multiple lists: zip and zip_longest, Selecting values from arrays or hashtables, Selecting from sets or lists (set theory), Hashing and encrypting strings and passwords, Searching strings with regular expressions. Configuration entries for each entry type have a low to high priority order. Is email scraping still a thing for spammers. plugin documentation and to avoid conflicting with other collections that may have Do EMC test houses typically accept copper foil in EUT? the same filter plugin name. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. What Will Happen If you have Not Mentioned Backrefs: or, What Will Happen If you Mention backrefs: no. Search across line endings if True, do not if otherwise. Note: It does not depend on the value of the hash_behaviour setting in ansible.cfg. The number of distinct words in a sentence. Configuration entries for each entry type have a low to high priority order. For below, vcsourcekit = 10, I want to match regex ^10. In most cases, you can use the short For example: The filter does support passing through other YAML parameters. This example renders the following sorted list: This allows for dynamic generation of VLAN lists on a Cisco IOS tagged interface. Compare string against regular expression using Pythons match or search functions. configuration in the value of top is the outer most container node, and vlan Search in a string or extract all the parts of a string matching a regular expression. 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. Use select and test the length. It only takes a minute to sign up. It defines how to parse the XML For example, the tasks below - debug: msg: bob is in the list when: somelist|select ('search', regex)|list|length > 0 vars: regex: '^name: bob$' - debug: msg: bobby is in the list when: somelist|select ('search', regex)|list|length > 0 vars: regex: '^name: bobby$' gives (abridged) 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. For that, use total_seconds(), # This expression evaluates to "12" and not "132". 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. 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. Communication. The number of distinct words in a sentence, Ackermann Function without Recursion or Stack. Issue Tracker When you need a randomly generated value, use one of these filters. I was trying to use expect with Ansible to automate package installation (in below example - uninstall). plugin name With ansible lineinfile module we can remove existed lines from the file and we can replace the lines. 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. If you want to configure the names of the keys, the dict2items filter accepts 2 keyword arguments. It defines how to parse the CLI To avoid this problem you should mention backref as yes. This is roughly equivalent to nested for-loops in a generator expression. Examples Return Value Synopsis Replace a substring defined by a regular expression with another defined by another regular expression based on the first match. Connect and share knowledge within a single location that is structured and easy to search. Are there conventions to indicate a new item in a list? If you order a special airline meal (e.g. Jinja2 provides other mathematical functions like abs() and round(). It is up to the user to maintain idempotence by ensuring that the same pattern would never match any replacements made. This describes positional parameters of the filter. Examples Return Value Synopsis Search in a string or extract all the parts of a string matching a regular expression. Find a vector in the null space of a large dense matrix, where elements in the matrix are not directly accessible. Collections in the Ansible Namespace Ansible.Builtin ansible.builtin.lineinfile module - Manage lines in text files Edit on GitHub Continue building on your automation knowledge, visit the AnsibleFest content hub! How does a fan in a turbofan engine suck air in? Copyright Ansible project contributors. ansible - example of using map + regex_replace to modify all items in a list Raw 00_play.yml This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Filters can help you manage missing or undefined variables by providing defaults or making some variables optional. . Copyright Ansible project contributors. Putting the regex into a variable simplifies the condition. Ansible would report the following error: We could be wrong, but this one looks like it might be an issue with Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. However, we recommend you use the FQCN for easy linking to the Regular expression string that defines the replacement. Issue Tracker my play looks like: - name: Get version set_fact: version: "{{ show_version.stdout | regex_search('Software Version. For example, a variable that is lower in the list will override a variable that is higher up. Also the colon is causing the following error: syntax error - mapping values are not allowed in this context. How can I set an Ansible variable depending on hostname? After I've found Use Jinja match filter instead of regex_match The number of distinct words in a sentence. Configuration entries for each entry type have a low to high priority order. 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. Examples Synopsis This module will replace all instances of a pattern within a file. Communication. Follow the installation instructions to install that collection. To learn more, see our tips on writing great answers. Copyright Ansible project contributors. 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. 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. How to derive the state of a qubit after a partial measurement? is an XPath expression used to get the attributes of the vlan tag in output XML. i'm trying to use regex_search to match only the Software Version : v22.1.1 line. Why does the impeller of a torque converter sit behind the turbine? 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. Stop by the google group! Jordan's line about intimate parties in The Great Gatsby? You can search for the minimum or maximum value in a list, or flatten a multi-level list. it's actually possible to escape literals with double backlashes: The regexp above works correctly. 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. So what *is* the Latin word for chocolate? 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. Connect and share knowledge within a single location that is structured and easy to search. with the parsed VLAN information. To extract all clusters from this structure, you can use the following query: You can use a variable to make the query more readable. However, we recommend you use the FQCN for easy linking to the Backrefs yes will replace the line with hello devops only if it is find regexp line(^docker) in file. *)$' 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. 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. These filters have migrated to the kubernetes.core collection. Ansible playbook - does include_role and delegate_to work together. This concatenation works without casting : selects just In the following examples i will show you how to use ansible lineinfile module with different parameters like regexpto insert new lines. My application required "not" in the "when" statement but it would not be needed to answer the original question. To review, open the file in an editor that reveals hidden Unicode characters. 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. The json_query filter lets you query a complex JSON structure and iterate over it using a loop structure. 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 learn more, see our tips on writing great answers. 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 (' ( [^\\.]*)\\. Let's say foo.txt contains the following. How to combine multiple named patterns into one Cases? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Ansible does not send a value for mode. Updated on: January 1, 2022 Sarav AK. If you order a special airline meal (e.g. 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. The same command could be parsed into a hash by using the key and values Positional parameters This describes positional parameters of the filter. 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. Let us discuss examples of Ansible Expect. regex even without specifying the collections: keyword. Ansible selectattr filter is to select matching objects from the dictionary by applying a test across all the objects in a dictionary/sequence. The product filter returns the cartesian product of the input iterables. See the two examples below. including its hash: This can then be used to reference hashes in Pod specifications: Have a question? In the following examples i will show you how to use ansible lineinfile module with different parameters like regexpto insert new lines. you can remove the "name: " on your list as it's still the same to every elt. Dot product of vector with camera's local positive x-axis? In most cases, you can use the short What does meta-philosophy have to say about the (presumably) philosophical work of non professional philosophers? Ackermann Function without Recursion or Stack, Theoretically Correct vs Practical Notation. 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. Search in a string to extract the part that matches the regular expression. 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. These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_search(key1=value1, key2=value2, ). For example: shell: cmd="base64 --decode > myfile.bin" stdin="{{ encoded }}". In most cases, you can use the short Is email scraping still a thing for spammers, How do you get out of a corner when plotting yourself into a corner. In the all above examples we discussed about the line started with, since i mentioned the symbol(^). 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. Is a string, its possible values are replace (default), keep, append, prepend, append_rp or prepend_rp. Ansible: regex to search for a specific string in list, The open-source game engine youve been waiting for: Godot (Ep. If you run the playbook multiple times, the line will be added taht number of times. Ansible regex with assert operator. relative to the value of XPath in top. 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. Making statements based on opinion; back them up with references or personal experience. a default with a value in a nested data structure (in other words, {{ foo.bar.baz | default('DEFAULT') }}) when you do not know if the intermediate values are defined. Would it Replace all the Matching Lines? 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. Input This describes the input of the filter, the value before | ansible.builtin.regex_findall. sorted string list of integers according to IOS-like VLAN list rules. The spec file should be valid formatted YAML. 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: "". 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. Is there a proper earth ground point in this switch box? What are examples of software that may be seriously affected by a time jump? 0. : For more information on supported XPath expressions, see XPath Support. output and return JSON data. This describes the input of the filter, the value before | ansible.builtin.regex_search. 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 . Dot product of vector with camera's local positive x-axis? "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. For example to Here we mentioned in the regexp parameter as ^devops. This describes the input of the test, the value before is ansible.builtin.regex or is not ansible.builtin.regex. 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.
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