Ansible extract character from string. stripping out characters in ansible.

Ansible extract character from string Mar 25, 2025 · For consistent results, quote octal numbers (for example, '644' or '1777') so Ansible receives a string and can do its own conversion from string into number. Jun 28, 2017 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. extract nexus-version set_fact: nexus_path: "/opt/nexus Apr 29, 2023 · In Ansible, the regex_search filter is a Jinja2 filter that allows you to search for a regular expression pattern in a string and extract the matching substring. the list of values can be a simple list or sequence or complex hashtable aka dictionary. But I haven't found a way to extract all the lines and assign them to an array containing the string, from the file Oct 20, 2020 · you can use regex_replace to extract the username from the above string of stdout_lines[0]. +)', '\\1') | first }}" This would return an array with a single element, so I added | first to get only one element directly as a string. The substring function I saw I can use with Jinja does not fulfill my needs as I need to strip the end of the string, not the start. Ansible split is a filter based on Python Split to split based on a character (separator) We will see examples of Ansible Split filters with different datasets like Simple strings, Lists, Dictionaries etc. When deploying with ansible, There's 1 specific case where I need to strip a string of a trailing -p substring. the left three characters from a string, similar to this? ansible, jinja2 only print first 3 character but if I need to I need to extract the last 4 characters from an ansible variable, like if my variable was abc-prod, or abc-devl, i only want prod and devl. The regex_search filter allows searching for a regex pattern within a string variable or output in Ansible. Mar 25, 2025 · Note. - set_fact: matched: "{{ item | regex Apr 28, 2020 · I have a requirement where I have to extract/filter particular length of a string in ansible. extract for easy linking to the plugin documentation and to avoid conflicting with other collections that may have the same filter plugin name. parsing substring from variable with ansible. 1. rc != 0 I need to extract from a string a set of characters which are included between two delimiters, without returning the delimiters themselves. I need to capture the stdout from an ansible play and parse this output for a specific substring within stdout and save into a var. Let‘s look at how it works. – Zeitounator Commented Mar 19, 2022 at 6:47 Jun 28, 2022 · I wrote a a task which just print if restart required. Apr 14, 2024 · I think it is python string manipulation knowledge (which apparently I am lacking) being needed here. Example: variable "example_string" { description = "A string from which to extract a substring" default = "Terraform" } locals { extracted_substring = substr(var. Feb 5, 2024 · Extracting part of the string using Ansible regex_search and save the output as a variable Mar 25, 2025 · Search in a string to extract the part that matches the regular expression. To get the list of files containing the text, I am trying to use the find module. I'm using ansible and regular expression. I see I could possibly use regex_replace or regex_search, can someone help me out with this? Jul 3, 2019 · I'm trying to find a string after 1 white space in a line, if it exists then extract the complete line and store in a different variable. +). Provide details and share your research! But avoid …. String to match against. Syntax of the LEFT Function: Mar 25, 2025 · Manipulating data . Oct 12, 2020 · See my latest edit for a regexp that will match one or more bs (they will still need to be next to ::) and it will not work if the bs are next to any other character. In many cases, you will need to perform complex operations with your variables. The code works in Ansible 2. def1=value2 aaaa. So in fact variable we will have. Say I have something like below: greeting: "Hello_World" Aug 19, 2015 · I would like to fetch first few character from a registered variable. Rather, “trim” removes leading and trailing spaces from the string piped into it: Mar 7, 2024 · HI, If you need just the last character, the following will work. For example:-My node machine has following hostname:- jpujenkins, jpunessus. Ansible - Cut characters from a string using index numbers by Jeremy Canfield | Updated: March 02 2022 | Ansible articles [0] can be used to get the first character from the string "Hello World". There are two modules that you can use to achieve this: the replace module and the inline module. Underneath it, use the Python re module. Mar 21, 2018 · If you wanted to try to use module that are included you could use the slurp module and the set_fact module and with jinja2 you can extract the password using a regex like such: May 5, 2020 · Since test_list is a list, you need to loop through the items to be matched using regex. The caret (^) matches the start of a line, and the dollar sign ($) matches the end of a line. split filter to transform a character/string delimited string into a list of items suitable for looping. Ansible extract value using regex. Jan 11, 2017 · Ansible 2. How do I specify a regex to search for the string name: bob - note that this should not match with name: bobby. Dec 19, 2023 · I am trying to find if the files of a type contain a string and want to extract the entire matching line, from the file. example Jun 6, 2022 · Given a string variable somevariable, somevariable[-1] is the last character, and somevariable[:-1] is the string not including the last character. I have this ouput from an excuted command (teleport users add): "stdout": "Signup token has been created and is valid for 3600 seconds. 2. - debug: msg: "{{ platform_list }} of type {{ platform_list| type_debug }}" Further Q&A. yourString. json_query filter. Jan 26, 2019 · Is there a way in yaml to extract e. 3. The above seems to extract the first character in the word boundary: I'm trying to extract the digits from a string. I've tried using ^ and $ to Aug 22, 2022 · Extract last character of string with ansible and regex_replace filter. regex_findall for easy linking to the plugin documentation and to avoid conflicting with other collections that may have the same filter plugin name. +) . Ansible - Check variable type; Ansible - Type cast Jul 30, 2019 · Also note that inventory_hostname[_short] defined in inventory can be different from ansible_hostname gathered from the target. Jan 1, 2022 · Using Extract filter in Ansible Map - with List/Sequence. Use the ansible. Base string: This is a test string [more or less] Dec 14, 2023 · It’s true that “split(‘,’)” will split a string containing commas into a list of strings. Ansible regex_search Basics. This describes positional parameters of the filter. My goal is to remove spaces with hyphens "-" and remove any special characters like the ' in laptop's in the user account name. Nov 24, 2021 · I am a newbie in ansible, I have a string in following format: str = &quot; aaaa. Adding a leading zero (for example, 0755 ) works sometimes, but can fail in loops and some other circumstances. 170. Sep 25, 2018 · I'm new to Ansible, trying to use Assert module to validate the length of a string. Something like below can be done. In most cases, you can use the short plugin name urlsplit. I need to extract the 1st 2 characters in a string to later create bin plot distribution. However, we recommend you use the Fully Qualified Collection Name (FQCN) ansible. If the string exists in any other place then it should not be matched. regex_search. To get a better insight into the variable type you may use according Managing data type - Discovering the data type type_debug. Additionally, square brackets ([]) are used to define a character class, allowing you to match any single character within the brackets. The split filter – split a string into a list together with first filter is then used to get the left side of the : separated result set. Aug 20, 2021 · Adding | trim to the end for some reason doesn't remove the whitespaces, and adding regex_search('\'','') also doesn't seem to escape the character and work. Sep 5, 2019 · You can use ansible filters to extract a specific substring from variables. Sep 12, 2023 · You just need a join to make your current expression's output (list) into a string. Just can't get Jinja to do its thing. – I am looking for a validation to check if the last character is indeed a number. This describes the input of the filter, the value before | ansible. While Ansible is not recommended as a data processing/manipulation tool, you can use the existing Jinja2 templating in conjunction with the many added Ansible filters, lookups and tests to perform some very complex transformations. In addition to this, use your registered data in the loop Jan 11, 2024 · The split filter in Ansible allows you to divide a string or list into smaller elements based on a specified delimiter. g. 10. Sep 29, 2021 · Here is the sample playbook, only the last line with regex_search is relevant here. # gather_facts: false. – LJS. 40. split() with multiple Nov 6, 2017 · I'm trying to extract a substring from a multine string with Ansible regex without success. Jan 1, 2018 · I'm trying to use regex_replace to extract just the interface names from a list of strings that includes other information about the interface. Try to write the task for that, and If you are stuck in that, then please share your progress and we can help you from there. I have tried various ways such as: Aug 17, 2017 · My problem is with ansible and parsing stdout. extracted Im trying to do some tricky things with a variable a user is inputting. let us first see how an ansible map can be used to iterate a simple list Oct 26, 2017 · When working with variables in Ansible, sometimes you don’t need the whole string, just a part of it. before and after that string to be matched. The result register contains string: "'MWCC' | length == 3". I see I could possibly use regex_replace or regex_search, can someone help me out with this? "{{ variable | regex. My specific use ca Jul 19, 2019 · The short answer is "omit the first and the last character" if the quotes are part of the string - set_fact: unique_key: command_output. For example, we have a variable like ansible_nodename containing the fqdn: server1. The situation. com nginx-node-10. Two separate "set_fact" stanzas are needed so that "keytype" is set before it is used. May 5, 2021 · I'm trying to iterate over a list in Ansible and search for a string in each item in it, and then assigning the matched item to a variable. In most cases, you can use the short plugin name regex_replace. Jul 2, 2020 · Fix the indentation. ansible string. Ansible extract sub-string from a matched element of a List variable. log" tasks: - name: Search for string in file command: cmd: "grep '{{ SEARCH_STRING }}' {{ SEARCH_FILE }}" register: result # Since it is a reporting task # which needs to deliver a result in any case failed_when: result. Rest is for illustration purpose. The LEFT function extracts a particular number of characters from the left of a string. Feb 24, 2024 · As you might have already guessed, Ansible provides filters/functions to ease our job. Splitting Ansible output into 2 different strings. 4. For example, if I have the string 'host2' I want only the '2' returned. regex_search can be used for extracting the desired part from the text: above regex would capture everything after = on the line containing target list and back-referenced using \1. 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. example_string, 0 , 4 ) } output "substring_output" { value = local. Like this aabb::aa::cc will turn into aaaa::cc . Result: "my_var": "/var/lib/zookeeper". As it will provide a list, the Jinja2 Filter first will give only the first result. builtin. The community. com:28569, how can I use the hostname part (hostname_01 and don"t use the :28569) to be use in an action ? If omitted, the function will extract characters from the offset position until the end of the string. Oct 7, 2021 · I want to remove a specific substring from a variable in Ansible and store the result into another variable. This filter plugin is part of ansible-core and included in all Ansible installations. Nov 14, 2023 · Extract structured data like IP addresses ; Split unstructured logs into fields; Ansible modules like regex_search make regex power readily available in your playbooks. If there is a number at in the middle it should not count for the check Nov 12, 2015 · Hi, if I have a string/var with hostname_01. Sep 6, 2022 · Extract last character of string with ansible and regex_replace filter. ToString If there is possibility to get 2 or more digits numbers, the following regex works. I want to get to the slices of the below variable, how would I do so ? hostvars[inventory_hostname]['ansible_hostname']|list. Jun 10, 2016 · In a playbook, I try to extract the last character of variable "ansible_hostname". ) matches any character except a newline. Result: "my_var": "/var/lib/zookeeper" Sep 29, 2021 · Here is the sample playbook, only the last line with regex_search is relevant here. stdout | regex_search('dataDir=(. Examples: nginx-node-01. 2. 44. Ideas? Jun 10, 2022 · Essentially, the problem is as follows: last_name can be double barelled, and I want to extract the first letter of each of the words contained within it. 3. I've put the dots '. If there is no digit in the string, I want '1' returned. Asking for help, clarification, or responding to other answers. urlsplit for easy linking to the plugin documentation and to avoid conflicting with other collections that may have the same filter plugin name. e. Ansible truncate concatentated string. Jul 30, 2020 · I need to extract the last 4 characters from an ansible variable, like if my variable was abc-prod, or abc-devl, i only want prod and devl. ansible The dot (. {{ ansible_hostname }} --> jpujenkins. search( ) }}" Nov 27, 2018 · how to extract string from ansible regsiter variable in ansible. Sep 30, 2017 · Extract last character of string with ansible and regex_replace filter. But @sivel's solution with slicing is probably better, the reason you cannot find it in documentation is because this is a "Pythonism" and a Feb 1, 2023 · --- - hosts: localhost become: false gather_facts: false vars: SEARCH_STRING: "nodeagent stopped" SEARCH_FILE: "test. 8. abc1=value1 aaaa. regex_replace for easy linking to the plugin documentation and to avoid conflicting with other collections that may have the same filter plugin name. A simple example should be helpful: Target: extract the substring between square brackets, without returning the brackets themselves. ' into the code to make the comparison easier. The only solution to reliably achieve your requirement IMO is to extract the characters before the first dot using either the split() python method available on string objects or the regex_replace filter Aug 20, 2021 · Your regex creates one group for each character in your hostname. 0 running on Debian 9 (Raspbian "Stretch"). I try to use regex_replace filter to do that, but nothing works. There is an example using setup module: - hosts: myhost gather_facts: false # turn off automatic setup invocation for this example tasks: - name: my setup setup: register: myvar # register setup module json output to variable - name: getting inside json structure for a string debug: msg="{{ myvar. basically I have a hostname, hostname001 that I wish to retrieve the last two characters on. Some examples: host1 -> 1 ho12st -> 12 host -> 1 host2 -> 2 host2test -> 2 host02 -> 02 host34 -> 34 Mar 25, 2025 · Note. The group should be (. abc2= aaaa. Similar Q&A Oct 13, 2021 · This may prove particularly useful with Ansible’s lineinfile module. For example, if you want to split a string variable fruits by commas, you can use: Jun 4, 2021 · I have a machine where the variable contains the a number that I want to extract and then split to build an IP address using ansible. Nov 16, 2022 · As already mentioned in the comments, the output is not a list but a string. I tried with this playbook: --- - name: Ansible regex Mar 25, 2025 · Note. Sep 15, 2020 · You need to add a group to your regex and a second parameter that specifies which group to return: my_var: "{{ zoo_config_content. The string somemachine-prod-p should become somemachine-prod only if the -p is at the end. In most cases, you can use the short plugin name regex_findall. ddd1= &quot; Spaces between the string is basically a blank line. Jul 2, 2024 · 5 Ways to Extract Text from a Cell in Excel Method 1 – Using the LEFT Function to Extract Text from a Cell. To be more specific, I'm pulling all MAC addresses on eac Jan 12, 2023 · The regex_findall filter – extract all regex matches from string with https:// and behind the match (. Could you please help to remove the single quotes ' Feb 19, 2021 · How I can extract with regexp from hostname number without one from domain. You can use the Ansible-specific filters documented here to manipulate your data, or use any of the standard filters shipped with Jinja2 - see the list of built-in filters in the Jul 25, 2022 · Because of character number limitation, I added the comments in the main task. \\1 replaces the string with the first backreference. In most cases, you can use the short plugin name extract. Like every sensible Ansible user, you will use Ansible’s lineinfile. variable = machine240dev I want to be able to extract 240 then split it to fill in the two middle octets of an ip address. You are returning the whole match (including Host Name: ) and not just the name itself. Extract substring from variable in Ansible. vector: x <- c("75 to 79", "80 to 84", "85 to 89") I have gotten this far: Oct 9, 2019 · Without knowing ansible but reading what you want to achieve, I recomment you to use: /^this[^!]*/s ^this looks for the string 'this' at the beginning [^!]* looks for zero or more characters which are not a '!' /s allows you to search over multiple lines Mar 15, 2019 · keep everything from the start of the string in the first backreference-[^-]+$ find the last "-" followed by non-"-" characters till the end of string. But the trim filter does nothing with quotes. Nov 23, 2020 · I have a list of strings called somelist as shown below. com And I need extract only number after nginx-node-, without number Mar 2, 2020 · Extract last character of string with ansible and regex_replace filter. Sep 29, 2021 · Here is the sample playbook, only the last line with regex_search is relevant here. 7. Oct 19, 2017 · It seems that "match" requires a pattern that matches the whole string, hence the *. 0. It turns out that some of the lines you try to replace contain characters that Oct 4, 2016 · If this json object was returned to you from a module, then you could use "register". Using Ansible, you may quickly find yourself in a situation where you need to modify a configuration file. - hosts: node1 gather_facts: False tasks: - name: Check Value Feb 5, 2024 · Extracting part of the string using Ansible regex_search and save the output as a variable Mar 25, 2025 · Search in a string to extract the part that matches the regular expression. Result: "my_var": "/var/lib/zookeeper" 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. {{ ansible_hostname }} --> jpunessus May 21, 2020 · Ansible has as splitext filter but unfortunately it only splits the extension after the last dot. here is a task to do it: Replace character in a string with Ansible. Extract filter within Ansible map used to map list of indices to list of values. connection: local. json_query filter lets you query a complex JSON structure and iterate over it using a loop structure. Syntax and usage of `regex_match` in Ansible Nov 15, 2022 · Extract last character of string with ansible and regex_replace filter. prd1. Am I missing something? Here's the output from the debug after the first removal: Mar 25, 2025 · Note. And that is working. Last. stdout[1:-1] Internal interpretation is all the same. For example: Oct 29, 2023 · Ansible provide multiple ways that you can use to replace a string, an entire line or words that match a certain pattern. stripping out characters in ansible. I simplified my piece of script with this ad-hoc command : ansible localhost -m debug -a "msg= {{ 'devserver01' | regex_replace('[0-9]{1}$', '\1') }}" I want to extract the last character : '1'. general. You can use it to extract specific information from a string or restructure a list into more manageable parts. Can somebody please suggest me how to do that. Regex seems like best way forward. I have this yum module output and I need to extract the word &quot;Complete | or_some_other_word&quot; and this task will only run if aforemen Mar 25, 2025 · To select a single element or a data subset from a complex data structure in JSON format (for example, Ansible facts), use the community. zwxry czsttkkn amdf xxvqc lndaeb nmeezu kirlu vmdz gilhv xcm tagc ktv ailjay eijrp buf