ansible regex examplesansible regex examples

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. Would the reflected sun's radiation melt ice in LEO? 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. You can create custom Ansible filters as plugins, though we generally welcome new filters into the ansible-core repo so everyone can use them. that select elements. Ansible - regular expression search using regex_findall. Let's say foo.txt contains the following. Without that filter before b64encode the wrong value will be encoded. 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. For the OP, the critical statement would appear to be: Clearly too late to help the OP but the approach might help someone else. The main goal of the cooperative is striving to become a center of excellence and a reference point for software development. Has China expressed the desire to claim Outer Manchuria recently? was trying to match this pattern (both lines) but my script fails. Copyright Ansible project contributors. How to combine multiple named patterns into one Cases? To learn more, see our tips on writing great answers. Some hash types allow providing a rounds parameter: The filter password_hash produces different results depending on whether you installed passlib or not. It's not necessary to escape it. In most cases, you can use the short Here is the example playbook with the regular expression pattern . For example, a variable that is lower in the list will override a variable that is higher up. plugin name What are examples of software that may be seriously affected by a time jump? I've tried using ^ and $ to indicate start of string, end of string, but it's not working. This describes keyword parameters of the filter. By default, Ansible fails if a variable in your playbook or command is undefined. 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. Ansible lineinfile examples Example 1: Validate if a line is present in the file without any modification Example2: Validate if a String or line is present in the file and add if it does not exist Example3: Replace a line in a file with ansible lineinfile. In the following examples i will show you how to use ansible lineinfile module with different parameters like regexpto insert new lines. 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. Replace a substring defined by a regular expression with another defined by another regular expression based on the first 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. It is up to the user to maintain idempotence by ensuring that the same pattern would never match any replacements made. With ansible lineinfile module we can remove existed lines from the file and we can replace the lines. ", # => "$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]+)'. Filters can help you manage missing or undefined variables by providing defaults or making some variables optional. through formatted as JSON. vegan) just to try it, does this inconvenience the caterers and staff? 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. 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. Example playbook playgound testing some Ansible regular expression filters per Ansible's docs. To convert the output of a network device CLI command into structured JSON Can the Spiritual Weapon spell be used as cover? Force the search to be case insensitive if True, case sensitive otherwise. Valid values for this parameter are: [2, 2a, 2y, 2b]. The spec file should be valid formatted YAML. 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. A convenient way of requiring a variable to be overridden is to give it an undefined value using the undef keyword. TextFSM library. :) I noticed that if I use the expression in a when clause then I need to place parentheses around the colon. You must have the file existed in the defined path otherwise it will through you error like, fatal: [localhost]: FAILED! This describes the input of the filter, the value before | ansible.builtin.regex_findall. This concatenation works without casting : selects just Do EMC test houses typically accept copper foil in EUT? To add the line to the file, we should mention state parameter as present. It defines how to parse the CLI : You can select or combine items from sets or lists. Though it works for one line - Is this ok [y/N]: y. Regex that I have used for both lines is Installed . (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 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! You can cast values as certain types. It only takes a minute to sign up. var: DeviceName: "switch.example.com" - name: Valdiate device name set_fact: switchname: " { {'false' if DeviceName | regex_search ('switch') else 'true'}}" delivers true for a switch and false for a server it seems to be your regular expression. The filter also accepts two optional parameters: recursive and list_merge. This describes the input of the filter, the value before | ansible.builtin.regex_replace. Search across line endings if True, do not if otherwise. These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_search(key1=value1, key2=value2, ). 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. Asking for help, clarification, or responding to other answers. 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. 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 Required fields are marked *. This symbol represents the line starting with, if you want to know more different options you should learn python regexp. However, we recommend you use the FQCN for easy linking to the Escaping single quotes within single quotes in YAML is done by doubling the single quote. {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. Is a boolean, default to False. See Why does the regex_search filter return None instead of an empty string? These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_findall(positional1, positional2, ). Repository (Sources) 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. The number of distinct words in a sentence. Follow the installation instructions to install that collection. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Ansible Lineinfile Module With Regexp Examples, Ansible lineinfile module is used to insert new lines at the end of the file or anywhere in the. To learn more, see our tips on writing great answers. Asking for help, clarification, or responding to other answers. 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. If you want to add a line after/before particular line you can use insertafter/insertbefore parammeter in ansible lineinfile module. This filter can be used to generate a random MAC address from a string prefix. Because templating happens on the Ansible controller, not on the target host, filters execute on the controller and transform data locally. Ansible would report the following error: We could be wrong, but this one looks like it might be an issue with Configuration entries for each entry type have a low to high priority order. Ansible: regex to search for a specific string in list, The open-source game engine youve been waiting for: Godot (Ep. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. The product filter returns the cartesian product of the input iterables. Putting the regex into a variable simplifies the condition. to search element on list, use the select attribute. This test plugin is part of ansible-core and included in all Ansible The from_yaml_all filter will return a generator of parsed YAML documents. which is an XPath expression relative to the root node (). For example, a variable that is lower in the list will override a variable that is higher up. 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. Last updated on Feb 17, 2023. ansible.builtin.regex_findall(positional1. Incomplete \ifodd; all text was ignored after line. Other hash types will simply ignore this parameter. and input is not ansible.builtin.regex (key1=value1, key2=value2, .). rev2023.3.1.43269. 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. 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. if the file is already existed then it will append to end of file. 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. 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. You're welcome. 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. Making statements based on opinion; back them up with references or personal experience. 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. For below, vcsourcekit = 10, I want to match regex ^10. That causes unexpected line break after 80th symbol (if there is a space after 80th symbol) the same test plugin name. Issue Tracker The spec file above will return a JSON data structure that is a list of hashes 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. For example the following: Ansible offers styles for comments in C (//), C block Repository (Sources) "{{ foo | default(None) | some_filter or omit }}". How did StorageTek STC 4305 use backing HDDs? You need to add a group to your regex and a second parameter that specifies which group to return: - set_fact: my_var: " { { zoo_config_content.stdout | regex_search ('dataDir= (.+)', '\\1') | first }}" This would return an array with a single element, so I added | first to get only one element directly as a string. 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. will parse the output from the show vlan command. Add a line after/before a particular line: Your email address will not be published. To convert the XML output of a network device command into structured JSON : For more information on supported XPath expressions, see XPath Support. To remove the line by using regexp in ansible we should use state parameter as absent. for details. rev2023.3.1.43269. These are the values key1=value1, key2=value2 and so on in the following examples: input is ansible.builtin.regex(key1=value1, key2=value2, ) and input is not ansible.builtin.regex(key1=value1, key2=value2, ). (.+)$', '\\1') }}_stg" The regexp above works correctly. Story Identification: Nanomachines Building Cities. This is driving me crazy as to the correct format for the test condition. If you order a special airline meal (e.g. you can remove the "name: " on your list as it's still the same to every elt. 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. 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. 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. Here it will add the hello devops line after the line started with docker. Connect and share knowledge within a single location that is structured and easy to search. 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. installations. 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. In this example, Hello is replaced with Goodbye. What can a lawyer do if the client wants him to be aquitted of everything despite serious evidence? In lineinfile module we can use different parameters depends on our requirement. You can link here as a reference. Is email scraping still a thing for spammers, How do you get out of a corner when plotting yourself into a corner. Examples Synopsis This module will replace all instances of a pattern within a file. . The tasks below give the same results. Search across line endings if True, do not if otherwise. 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. Regular expression string that defines the match. These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_replace(positional1, positional2, ). 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. 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. My application required "not" in the "when" statement but it would not be needed to answer the original question. The crypt is used as a fallback if passlib is not installed. Issue Tracker 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! my play looks like: - name: Get version set_fact: version: "{{ show_version.stdout | regex_search('Software Version. Ansible Map Filter does two things Communication. With ansible lineinfile module we can remove existed lines from the file and we can replace the lines. This is roughly equivalent to nested for-loops in a generator expression. Regular expression string that defines the match. The final result is a list of IP addresses for the hosts in group x. Follow the installation instructions to install that collection. in ipaddr filter. is the inner-most container node. as in example? The value of state in the spec Copyright Ansible project contributors. What is the syntax within the regex_search() to match against a variable? Copyright Ansible project contributors. If you are chaining additional filters after the default(omit) filter, you should instead do something like this: Ackermann Function without Recursion or Stack, Theoretically Correct vs Practical Notation. will parse the output from the show vlan | display xml command. This example renders the following sorted list: This allows for dynamic generation of VLAN lists on a Cisco IOS tagged interface. 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. regex_search even without specifying the collections: keyword. Is a string, its possible values are replace (default), keep, append, prepend, append_rp or prepend_rp. end_block directives to break the command into blocks that can be parsed. The same command could be parsed into a hash by using the key and values Does Cast a Spell make you a spellcaster? 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. Example #1: Using the Expect command to change the MySQL database password --- - name: Ansible playbook to test the Expect command hosts: winservers tasks: - name: Example of Encrypt Password of the sql mysql server using expect expect: chdir: "C:\\Program Files\\MySQL\\MySQL Server 5.7\\bin" 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 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. Enable the jinja2_native setting if you want the regex_search filter to always return None if it cannot find a match. Learn more about Stack Overflow the company, and our products. If you order a special airline meal (e.g. It defines how to parse the XML PTIJ Should we be afraid of Artificial Intelligence? Create parameter with yes, we used to create the file if the file is not existed. 0. Force the search to be case insensitive if True, case sensitive otherwise. Repository (Sources) Does Cast a Spell make you a spellcaster? *)$' 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. if you removed the create parameter and if you run the playbook. # 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(. we should mention backrefs as yes. items is a dictionary of key-value pairs that map user-defined names to XPath expressions 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. start a value. 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. In most cases, you can use the short "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. output and return JSON data. This describes positional parameters of the filter. Thanks for contributing an answer to Stack Overflow! The replace module is used to replace data in a file. After I've found Use Jinja match filter instead of regex_match It doesn't evaluate the variable, rather interprets literally. regex even without specifying the collections: keyword. Jordan's line about intimate parties in The Great Gatsby? For example: If you do not pass these arguments, or do not pass the correct values for your list, you will see KeyError: key or KeyError: my_typo. regex_findall can be used to perform a regular expression search for a string matching one or more patterns. For example, the vlan_id in the spec file is a user defined name and its value vlan-id is the If you run the playbook multiple times, the line will be added taht number of times. These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_findall(key1=value1, key2=value2, ). 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. Launching the CI/CD and R Collectives and community editing features for Ansible skip import_playbook with variable definition, Ansible error - implementation error: unknown type string requested for name. The comment filter lets you create comments in a file from text in a template, with a variety of comment styles. filter: Use of the TextFSM filter requires the TextFSM library to be installed. For example, map from_yaml, create a list of dictionaries, and selectattr. Copyright Ansible project contributors. In the example XML output given below, the value of top is configuration/vlans/vlan, The first capturing group extracts the first part of the URL until the first dot, the whole regex captures the whole URL. Ansible selectattr filter is to select matching objects from the dictionary by applying a test across all the objects in a dictionary/sequence. 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.

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