ansible regex examples
Use the vlan_parser filter to transform an unsorted list of VLAN integers into a plugin documentation and to avoid conflicting with other collections that may have Ansible does not send a value for mode. Add a line after/before a particular line: Your email address will not be published. Dot product of vector with camera's local positive x-axis? Ansible lineinfile module is used to insert new lines at the end of the file or anywhere in the file. Stop by the google group! Configuration entries for each entry type have a low to high priority order. Save my name, email, and website in this browser for the next time I comment. Jinja2 provides other mathematical functions like abs() and round(). rev2023.3.1.43269. 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. Regular expression string that defines the match. 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! It seems that "match" requires a pattern that matches the whole string, hence the *. Ansible regex with assert operator. 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. 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. What is the syntax within the regex_search() to match against a variable? 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. Is a hot staple gun good enough for interior switch repair? end_block directives to break the command into blocks that can be parsed. Follow the installation instructions to install that collection. To learn more, see our tips on writing great answers. The Xpath expression is relative to the value of the XPath value contained in top. Issue Tracker The network filters also support parsing the output of a CLI command using the Is there a proper earth ground point in this switch box? For example, a variable that is lower in the list will override a variable that is higher up. Here we mentioned in the regexp parameter as ^devops. In most cases, you can use the short For example, the tasks below, It's possible to avoid regex. 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 main goal of the cooperative is striving to become a center of excellence and a reference point for software development. : For more information on supported XPath expressions, see XPath Support. is there a chinese version of ex. that means the line started with docker has to modify with the line hello devops in the file. If you are chaining additional filters after the default(omit) filter, you should instead do something like this: 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. Extracting part of the string using Ansible regex_search and save the output as a variable, The open-source game engine youve been waiting for: Godot (Ep. plugin name By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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 . Server Fault is a question and answer site for system and network administrators. Because templating happens on the Ansible controller, not on the target host, filters execute on the controller and transform data locally. However, we recommend you use the FQCN for easy linking to the Attributes of XML tags can be extracted using XPath expressions. However, we recommend you use the FQCN for easy linking to the 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. (.+)$', '\\1') }}_stg" The regexp above works correctly. # 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(. 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. For example, you might want to use a system default for some items and control the value for others. Find centralized, trusted content and collaborate around the technologies you use most. You can also use the data type itself to cast a value as a specific data type. Create parameter with yes, we used to create the file if the file is not existed. Regular expression string that defines the match. Communication. Use the k8s_config_resource_name filter to obtain the name of a Kubernetes ConfigMap or Secret, If you order a special airline meal (e.g. 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. plugin documentation and to avoid conflicting with other collections that may have This can be useful in a roles defaults. This filter has migrated to the community.general collection. Copyright Ansible project contributors. You can link here as a reference. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Enable the jinja2_native setting if you want the regex_search filter to always return None if it cannot find a match. output and return JSON data. 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. Result: PTIJ Should we be afraid of Artificial Intelligence? Decide which function to be used to do the matching. When you need a randomly generated value, use one of these filters. Always quote template expression brackets when they 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. To learn more, see our tips on writing great answers. 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. Search across line endings if True, do not if otherwise. For example to If you want to add the line before starting of the line, started with docker, you can put insertbefore. The number of distinct words in a sentence. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. This lets you specify individual subelements to use in a template. Last updated on Feb 17, 2023. I'm having a content like below inside a file. rev2023.3.1.43269. 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 *)$' to '\^f\.\*o\(\.\*\)\$', # convert '^f.*o(. For example: shell: cmd="base64 --decode > myfile.bin" stdin="{{ encoded }}". It defines how to parse the CLI Examples Return Value Synopsis Search in a string or extract all the parts of a string matching a regular expression. Putting a regex into a variable simplifies the expressions. If you want to configure the names of the keys, the dict2items filter accepts 2 keyword arguments. See Why does the regex_search filter return None instead of an empty string? Repository (Sources) Communication. Do EMC test houses typically accept copper foil in EUT? Let's say foo.txt contains the following. value using the same show vlan command. How can I match literals in Ansible regexp_replace filter? This is untested BTW. Two separate "set_fact" stanzas are needed so that "keytype" is set before it is used. Making statements based on opinion; back them up with references or personal experience. Configuration entries for each entry type have a low to high priority order. Below is an example of a valid spec file that The example above will parse the output of show interface into a list of installations. before and after that string to be matched. with the parsed VLAN information. if the file is already existed then it will append to end of file. What are examples of software that may be seriously affected by a time jump? You can configure Ansible to allow undefined variables by setting DEFAULT_UNDEFINED_VAR_BEHAVIOR to false. Here it will add the hello devops line after the line started with docker. To remove the line by using regexp in ansible we should use state parameter as absent. In most cases, you can use the short you can remove the "name: " on your list as it's still the same to every elt. 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. 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. Vladimir to the rescue as always. This describes positional parameters of the filter. I have written following code but regular expression and storing the variable both have some issues. Here is an example of how to parse the output into a hash Would the reflected sun's radiation melt ice in LEO? Can the Spiritual Weapon spell be used as cover? Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? This is driving me crazy as to the correct format for the test condition. If you configure Ansible to ignore most undefined variables, you can mark some variables as requiring values with the mandatory filter. What if there are More than one Matches :) I noticed that if I use the expression in a when clause then I need to place parentheses around the colon. 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. A convenient way of requiring a variable to be overridden is to give it an undefined value using the undef keyword. 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. In most cases, you can use the short Ansible would report the following error: We could be wrong, but this one looks like it might be an issue with Here it will remove the line started with docker. How do I access variables of a host using dynamic inventory in a MongoDB database using Ansible playbook? Ansible Lineinfile With Regexp Example: --- - hosts: localhost gather_facts: no tasks: - name: Ansible check directory. Putting the regex into a variable simplifies the condition. You can create a test, then define one value to use when the test returns true and another when the test returns false (new in version 1.9): In addition, you can define a one value to use on true, one value on false and a third value on null (new in version 2.8): You might need to know, change, or set the data type on a variable. This documentation is now very good, but at the time I wrote this test repo, it had many confusing errors. "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. String with substitution (or original if no match). It modifies the behaviour of combine when the hashes to merge contain arrays/lists. Is variance swap long volatility of volatility? I have a list of strings called somelist as shown below. The code works in Ansible 2.4.3.0 running on Debian 9 (Raspbian "Stretch"). Search across line endings if True, do not if otherwise. make the output of the ansible_managed variable more readable, we can 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. Examples Return Value Synopsis Search in a string to extract the part that matches the regular expression. The tasks below give the same results. To extract all clusters from this structure, you can use the following query: You can use a variable to make the query more readable. Communication. 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. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? This describes the input of the test, the value before is ansible.builtin.regex or is not ansible.builtin.regex. 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 YAML spec file defines how to parse the CLI output. 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. Search across line endings if True, do not if otherwise. Q2.) How did StorageTek STC 4305 use backing HDDs? My advice is to use YAML syntax: tasks: - replace: dest: ./src regexp: 'app_name:\s [A-Za-z0-9 ]*' replace: 'app_name: { { node }}' 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. How to react to a students panic attack in an oral exam? 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. These are the values positional1, positional2 and so on in the following example: input | ansible.builtin.regex_search(positional1, positional2, ). 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. How can I match "anything up until this sequence of characters" in a regular expression? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Jordan's line about intimate parties in The Great Gatsby? Copyright Ansible project contributors. Copyright Ansible project contributors. Thanks for contributing an answer to Server Fault! 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. I'm also not sure if it's consitent with Ansible/Jinja2 best practice. This is roughly equivalent to nested for-loops in a generator expression. You can also use Python methods to transform data. If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? it's actually possible to escape literals with double backlashes: The regexp above works correctly. It only takes a minute to sign up. ", # => "$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
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