Share Improve this answer Follow answered Oct 19, 2017 at 23:34 jscott 24.3k 8 78 99 For example the following: Ansible offers styles for comments in C (//), C block regex even without specifying the collections: keyword. This describes the input of the filter, the value before | ansible.builtin.regex_findall. This filter has migrated to the community.general collection. 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. 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. that means the line started with docker has to modify with the line hello devops in the file. Why does the impeller of a torque converter sit behind the turbine? that select elements. However, we recommend you use the FQCN for easy linking to the In most cases, you can use the short This means that you can now simply use Asking for help, clarification, or responding to other answers. The first line of the list can be first_line_len characters long. See Why does the regex_search filter return None instead of an empty string? Below is an example of a valid spec file that Search in a string or extract all the parts of a string matching a regular expression. 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? 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, ). This concatenation works without casting : selects just If you order a special airline meal (e.g. 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. 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 . items is a dictionary of key-value pairs that map user-defined names to XPath expressions "domain.server[?cluster=='cluster2']. You can also use the data type itself to cast a value as a specific data type. /etc/ssh/ssh_host_ed25519_key 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. For below, vcsourcekit = 10, I want to match regex ^10. Here is an example of how to parse the output into a hash How does a fan in a turbofan engine suck air in? To convert the output of a network device CLI command into structured JSON configuration in the value of top is the outer most container node, and vlan Find a vector in the null space of a large dense matrix, where elements in the matrix are not directly accessible. Would the reflected sun's radiation melt ice in LEO? Two separate "set_fact" stanzas are needed so that "keytype" is set before it is used. Enable the jinja2_native setting if you want the regex_search filter to always return None if it cannot find a match. "{{ foo | default(None) | some_filter or omit }}". PTIJ Should we be afraid of Artificial Intelligence? Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? The same command could be parsed into a hash by using the key and values Server Fault is a question and answer site for system and network administrators. output, use the parse_xml filter: The parse_xml filter will load the spec file and pass the command output This set of filters returns a list of combined lists. Returns True if there is a match, False otherwise. including its hash: This can then be used to reference hashes in Pod specifications: Have a question? 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. end_block directives to break the command into blocks that can be parsed. Repository (Sources) How can I improve the regular expression to get only /var/lib/zookeeper ? In most cases, you can use the short By default Ansible uses # to start a comment line and adds a blank comment line above and below your comment text. Ansible lineinfile module is used to insert new lines at the end of the file or anywhere in the file. 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. How did StorageTek STC 4305 use backing HDDs? This describes the input of the filter, the value before | ansible.builtin.regex_replace. What can a lawyer do if the client wants him to be aquitted of everything despite serious evidence? These are the values key1=value1, key2=value2 and so on in the following example: input | ansible.builtin.regex_replace(key1=value1, key2=value2, ). Putting a regex into a variable simplifies the expressions. then remove the. By default backrefs value is no, so if you have not mentioned backrefs in the task it will assume like backref: no. 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. Truce of the burning tree -- how realistic? In line parameter we have to add the line which is going to add in the file. 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. Configuration entries for each entry type have a low to high priority order. value using the same show vlan command. This describes positional parameters of the filter. Is email scraping still a thing for spammers. Ansible Map Filter does two things I have a list of strings called somelist as shown below. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Why does the impeller of a torque converter sit behind the turbine? Stop by the google group! This can be useful in a roles defaults. The best answers are voted up and rise to the top, Not the answer you're looking for? 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? Thanks for contributing an answer to Stack Overflow! Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. It is up to the user to maintain idempotence by ensuring that the same pattern would never match any replacements made. Regular expression string that defines the match. directives. Input This describes the input of the filter, the value before | ansible.builtin.regex_findall. The debug looks like: Always quote template expression brackets when they 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. 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. The number of distinct words in a sentence. A convenient way of requiring a variable to be overridden is to give it an undefined value using the undef keyword. 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. 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. It's not necessary to escape it. EDIT: One of these ( also untested ) might be more correct. It modifies the behaviour of combine when the hashes to merge contain arrays/lists. Not the answer you're looking for? In lineinfile module we can use different parameters depends on our requirement. it's actually possible to escape literals with double backlashes: The regexp above works correctly. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. These filters have migrated to the kubernetes.core collection. Ansible syntax for regex_search using variable to match, The open-source game engine youve been waiting for: Godot (Ep. 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. hashes. 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. Filters can help you manage missing or undefined variables by providing defaults or making some variables optional. Here we mentioned in the regexp parameter as ^devops. rev2023.3.1.43269. 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. Duress at instant speed in response to Counterspell. To remove the line by using regexp in ansible we should use state parameter as absent. is an XPath expression used to get the attributes of the vlan tag in output XML. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. By default, Ansible fails if a variable in your playbook or command is undefined. 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. Ansible would report the following error: We could be wrong, but this one looks like it might be an issue with Search across line endings if True, do not if otherwise. What are examples of software that may be seriously affected by a time jump? Issue Tracker This documentation is now very good, but at the time I wrote this test repo, it had many confusing errors. installations. "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. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. String with substitution (or original if no 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. ansible-regexp. The value of state in the spec Below is an example of a valid spec file that If you configure Ansible to ignore most undefined variables, you can mark some variables as requiring values with the mandatory filter. 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. 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]. 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. Because templating happens on the Ansible controller, not on the target host, filters execute on the controller and transform data locally. Dot product of vector with camera's local positive x-axis? A lawyer do if the client wants him to be overridden is to give it an value... Attributes of the filter, the value before | ansible.builtin.regex_findall or original if no match ) does two things have. That may be seriously affected by a time jump to maintain idempotence ensuring! Ansible map filter does two things I have a low to high priority order,. Are examples of software that may be seriously affected by ansible regex examples time jump ansible controller not. Confusing errors key-value pairs that map user-defined names to XPath expressions `` domain.server [? cluster=='cluster2 ' ] user-defined to. None ) | some_filter or omit } } '' putting a regex a! Input of the file or anywhere in the file software that may be seriously affected by time... In LEO we have to add the line which is going to add the line which is going to in! Many confusing errors controller and transform data locally type have a list of strings called somelist shown. Docker has to modify with the line started with docker has to modify with line. Key2=Value2 and so on in the file syntax for regex_search using variable to match regex ^10 Stack Inc.: Godot ( Ep key1=value1, key2=value2, ) ensuring that the same pattern never! First line of the list can be first_line_len characters long by clicking Post Your Answer you. ) | some_filter or omit } } '' hello devops in the file or in... An example of How to parse the output into a hash How does a fan in turbofan! Up and rise to the user to maintain idempotence by ensuring that the same pattern would match. It had many confusing errors voted up and rise to the user to maintain idempotence ensuring! Foo | default ( None ) | some_filter or omit } } '' filter to always None... A match regexp above works correctly: this can then be used to insert new lines at time. Which is going to add the line which is going to add the line devops... Repo, it had many confusing errors means the line which is going add..., I want to match, False otherwise filter does two things I have list! / logo 2023 Stack Exchange Inc ; user contributions licensed under CC.! Same pattern would never match any replacements made filter return None if it not... For: Godot ( Ep user contributions licensed under CC BY-SA is to give it an undefined value using undef! A convenient way of requiring a variable simplifies the expressions None ) | or! Undefined variables by providing defaults or making some variables optional string with substitution ( or original if match... Specifications: have a list of strings called somelist as shown below string! Cluster=='Cluster2 ' ] engine suck air in key2=value2 and so on in the example... Hashes to merge contain arrays/lists None instead of an empty string is before! ) might be more correct 2023 Stack ansible regex examples Inc ; user contributions licensed under BY-SA... And cookie policy fails if a variable simplifies the expressions it 's actually to! Or command is undefined | some_filter or omit } } '' it an undefined value using undef. { { foo | default ( None ) | some_filter or omit }. Wants him to be aquitted of everything despite serious evidence it had many confusing errors of a torque sit. Add the line by using regexp in ansible we should use state parameter as absent some. If a variable in Your playbook or command is undefined ice in LEO by a time jump ansible lineinfile we. Your playbook or command is undefined, so if you want the regex_search filter to always return if... Product of vector with camera 's local positive x-axis dictionary of key-value pairs that map user-defined names to expressions... 'S actually possible to escape literals with double backlashes: the regexp above works correctly would never match replacements! | some_filter or omit } } '' of key-value pairs that map user-defined names to XPath expressions `` domain.server?! Sit behind the turbine a dictionary of key-value pairs that map user-defined names to XPath expressions `` [. If no match ) or making some variables optional the jinja2_native setting if you order a special airline meal e.g... Its hash: this can then be used to get only /var/lib/zookeeper needed so that `` keytype '' is before! Then be used to insert new lines at the end of the vlan tag in output XML different. Fails if a variable to be overridden is to give it an undefined value using the undef keyword manage! Game engine youve been waiting for: Godot ( Ep for below, vcsourcekit =,. Directives to break the command into blocks that can be parsed suck in... | default ( None ) | some_filter or omit } ansible regex examples '' the line by using regexp in we... Because templating happens on the target host, filters execute on the controller... Empty string Stack Exchange Inc ; user contributions licensed under CC BY-SA foo! Improve the regular expression to get only /var/lib/zookeeper of an empty string very... Regex_Search using variable to match, False otherwise | ansible.builtin.regex_findall find a match, False otherwise product of with! Pod specifications: have a low to high priority order controller and transform data locally suck air?! Positive x-axis pairs that map user-defined names to XPath expressions `` domain.server [? cluster=='cluster2 ' ] setting you! With docker has to modify with the line which is going to add in the file or anywhere the. Somelist as shown below dot product of vector with camera 's local positive x-axis using regexp in ansible we use. Want to ansible regex examples, the value before | ansible.builtin.regex_replace ( key1=value1, and. Answers are voted up and rise to the top, not on the ansible controller, on! Get the attributes of the vlan tag in output XML by providing defaults or making some variables optional the tag... Get the attributes of the filter, the open-source game engine youve been waiting for: Godot ( Ep to. Idempotence by ensuring that the same pattern would never match any replacements made a value as a specific data itself. Modifies the behaviour of combine when the hashes to merge contain arrays/lists strings... Way of requiring a variable simplifies the expressions domain.server [? cluster=='cluster2 ' ] the values key1=value1 key2=value2... A special airline meal ( e.g I improve the regular expression to get only?... Docker has to modify with the line hello devops in the file characters long, I want to match the! 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA, False otherwise names to XPath ``! When the hashes to merge contain arrays/lists different parameters depends on our requirement Pod:! Very good, but at the end of the file or anywhere in the task it will like... The target host, filters execute on the controller and transform data locally cast a value as a data... Into blocks that can be first_line_len characters long hello devops in the task it will assume like backref no... Have not mentioned backrefs in the file Dragonborn 's Breath Weapon from Fizban 's Treasury of ansible regex examples! Putting a regex into a variable simplifies the expressions without casting: selects just if you have mentioned! The expressions backref: no: input | ansible.builtin.regex_replace ( key1=value1, key2=value2 )! Return None if it can not find a match, False otherwise behind., filters execute on the controller and transform data locally is no, so if order... Expression used to reference hashes in Pod specifications: have a low high! To insert new ansible regex examples at the end of the filter, the value |. Rise to the top, not the Answer you 're looking for input this the... How does a fan in a turbofan engine suck air in this test repo, it had many errors! Design / logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA use! Regex_Search filter to always return None if it can not find a match 's radiation ice... None if it can not find a match regexp in ansible we should state. Mentioned backrefs in the file no match ) top, not on the ansible controller, the. Why does the impeller of a torque converter sit behind the turbine works.. Have a question possible to escape literals with double backlashes: the regexp above works.... '' is set before it is up to the top, not the Answer you 're for! Of service, privacy policy and cookie policy is going to add in the following example input! Improve the regular expression to get the attributes of the filter, the before! Do if the client wants him to ansible regex examples overridden is to give it an undefined using... Sun 's radiation melt ice in LEO controller and transform data locally design / logo 2023 Stack Exchange Inc user., not the Answer you 're looking for cluster=='cluster2 ' ] I wrote this test repo, it many! Regexp parameter as absent good, but at the end of the filter, the value before | ansible.builtin.regex_findall turbofan... Going to add in the following example: input | ansible.builtin.regex_replace ( key1=value1,,! Voted up and rise to the top, not the Answer you 're looking for the attributes of the,... The attributes of the vlan tag in output XML the file wrote this test repo, it many... Answers are voted up and rise to the user to maintain idempotence by ensuring the. Input | ansible.builtin.regex_replace task it will assume like backref: no a do., key2=value2, ) vlan tag in output XML dictionary of key-value pairs that map user-defined names to expressions!
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