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Ansible jinja2 string comparison. Jinja2 control structures often use comparisons.

  • Ansible jinja2 string comparison. Here is our article that can help Jan 18, 2022 · It’s easy for me to show you the behavior by example. Enter Jinja2 if statements – your key to unlocking the true power and flexibility of […] Sep 20, 2017 · Ansible Jinja2 string comparison. This file is a template to be used within an ansible script. This means that Ansible will preserve the newlines in the string. Ideas? Oct 16, 2021 · Jinja2 is a very popular and powerful Python-based template engine. Sep 25, 2015 · I am trying to write an Ansible playbook that only compiles Nginx if it's not already present and at the current version. In jinja2 when I try to compare them using an if, nothing shows up. In most cases, you can use the short plugin name match. 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. Jul 19, 2014 · The solution that will work in any case no matter how many nested quotes you might have and without forcing you to add more quotes around the whole thing (which can get tricky to impossible depending on the line you want to write) is to output the colon through a Jinja2 expression, which simply returns the colon as a string: {{ ":" }} Aug 5, 2024 · Ansible Galaxy; Deploy With Ansistrano; Large Scale infrastructure; Working With Filters; Management server optimizations; Working With Jinja Template in Ansible Working With Jinja Template in Ansible Table of contents. May 23, 2015 · There are some (currently) undocumented filters in Ansible 2. Sep 1, 2020 · I need your help since I'm at a complete loss here. Feb 20, 2019 · Due to how ansible and jinja2 interact, the following lines still result in strings: and '90. test. The string somemachine-prod-p should become somemachine-prod only if the -p is at the end. builtin. One of the core concepts taught with Ansible is Jinja2, a Python-based web template language that is commonly used to create infrastructure configuration templates. Oct 16, 2021 · Jinja2 is a very popular and powerful Python-based template engine. from ansible. In most cases, you can use the short plugin name strftime. So a simple. You can use templating with the template module. Mar 22, 2023 · It's not clear to me what you're doing here. Variables in Jinja2 expressions are referred by their names (and without quotes). We then use that variable as a normal Jinja2 variable inside the content of the for loop before ending the loop in Jul 2, 2015 · Since strings are lists of characters in Python, we can concatenate strings the same way we concatenate lists (with the + sign): {{ var1 + '-' + var2 + '-' + var3 }} If you want to pipe the resulting string to some filter, make sure you enclose the bits in parentheses: e. Specify True to get the current time in UTC. To Jinja2's internals var_containing_int is converted to an int, but it is converted back to a string before i_wish_it_was_an_int is assigned. 8. 6 days ago · Note. Just for curiosity, why should someone lean towards the solution you propose? – Worth noting that I wrote this answer in 2016, and even for that time I wasn't using the most recent version of ansible. Jinja2 templating - comparing strings. – Aug 16, 2020 · i_wish_it_was_an_int will never be an int to Ansible, in this circumstance. This filter plugin is part of ansible-core and included in all Ansible installations. The regex_search filter will perform a regex on the string and return the resulting match. Apr 30, 2021 · The now() Jinja2 function, allows you to retrieve python datetime object or a string representation for the current time. x upgrade broke everything. index0], which isn't a valid JMESPath query. Jinja2 templates is widely used in Ansible playbook to access variables, configuration etc. Conditionals with imports When you add a conditional to an import statement, Ansible applies the condition to all tasks within the imported file. To break a string over multiple lines in Ansible, you can use the following operators: Literal Block Scalar (|): This operator tells Ansible to treat the string as a literal block scalar. However it compiles every time which is undesirable. How to compare version strings in salt sls files. 10. To ensure code clarity you should avoid using empty strings in conditional statements with the when clause. match for easy linking to the plugin documentation and to avoid conflicting with other collections that may have the same test plugin name. Since Ansible is written in Python, it becomes the default choice for most users, just like other Python-based configuration management systems, such as Fabric and SaltStack. g. However, I don't seem to be able to access the python set Jul 19, 2021 · You are passing json_query the literal string [*]. 5. 27. salt-stack: how to get package version in state file and/or jinja template. This is an opt-in rule. Install ansible in your environment, import the filter and register it in the jinja2 environment. May 27, 2022 · The now() Jinja2 function, allows you to retrieve python datetime object or a string representation for the current time. These two strings are not equal, so you always get the value defined in else-statement. This is what I have: Jul 1, 2021 · The Jinja2 template includes the following line: LINE=” This string must be included this string is optional= {{ value1}}” What I need to implement: If value1 is defined with a string – let assume that the string is OK (Value1: OK), the file should be. 1 which may do what you need: Ansible plugins/filter. 0. Jan 4, 2018 · there is a way to compare between the current time using ansible_date_time with another date (aws ec2 launch time) So I will be able to know if it happened in the last hour? I have the following var ec2_launch_time: 2018-01-04T15:57:52+00:00 Dec 7, 2014 · I have an ansible variable passed in on the command line as such: ansible-playbook -e environment=staging ansible/make_server. 5, using a jinja test as a filter will generate a warning. py. How to make use of . py register: script_results - name: display run info debug: var: "{{script_results. bool for easy linking to the plugin documentation and to avoid conflicting with other collections that may have the same filter plugin name. last, I just need to May 5, 2021 · It is more advisable to use the right concatenation operator, ~ than the math operator + as advised in the Ansible documentation for the reason raised in Jinja documentation: Usually the objects are numbers, but if both are strings or lists, you can concatenate them this way. Example: {% set p = year ~ '/' ~ month ~ '/' ~ day ~ '/' ~ post. To concatenate our 3 vars, and get a sha512 hash: Jan 14, 2010 · I just want to loop through an existing list and make a comma delimited string out of it. You quickly realize you need a way to conditionally control the flow and inject logic based on variables, facts about managed nodes, or results of prior tasks. This is what I have so far: - name: run script command: /usr/tmp/run_script. Jinja2 control structures often use comparisons. But if you are willing to write a few lines of python, you can easily solve this with a custom filter. empty-string-compare fqcn This rule can report problems related to jinja2 string templates. LINE=” This string must be included this string is optional= OK” The now() Jinja2 function retrieves a Python datetime object or a string representation for the current time. I have a series of items which all take the form of <word><number> such as aaa01, aaa141, bbb05. 6 days ago · Templating (Jinja2) Ansible uses Jinja2 templating to enable dynamic expressions and access to variables and facts. I went to the simplest for demo, you would probably have to harden the code and fix edge cases for a real life use. 12, 10. Hot Network Questions Is it Thailand's *the person's name* or Thai *the person's name*? May 27, 2022 · Historically Ansible has registered tests as both jinja tests and jinja filters, allowing for them to be referenced using filter syntax. I have tried a lot of different methods such as: - include_vars: staging_vars. Use when: var | length > 0 instead of when: var != "". Be informed that, Only Ansible 2. Task conditionals are comparisons. So the | int in this case is a no-op. If you want to verify for your own sanity, play around with this Jan 9, 2024 · Comparison Operator. However, we recommend you use the Fully Qualified Collection Name (FQCN) ansible. globals dictionary. Jun 5, 2017 · I want to convert Ansible string value to float and compare with another float value In my ini file bin_version=6. 7+ with Jinja2 supports the selectattr for those who are not there yet, you can use ansible json_query. Instead use: Sep 27, 2012 · Given I have two variables {{ profile }} with a value "test" and {{ element. In chef w Feb 24, 2024 · As Ansible Quotes in their documentation besides the built-in Ansible filters, all JINJA2 filters can be used in Ansible playbooks. Using concatenation might look like: empty-string-compare¶ This rule checks for empty string comparison in playbooks. On the basis of this value I want to use server URL, whose possible values I have defined inside defaults/main. yml as: Oct 18, 2013 · I want to compare the Avalability Zones to get unique values and have IP from each unique Avalability Zone. services[loop. If you want to substitute the value of a variable in a string, you need to either build the string via concatenation, or use string formatting logic. 0 2 is greater than or equal to 1 2 is greater than or equal to 2 Feb 9, 2016 · I'm trying to filter a list in ansible in Jinja2 when the elements contain a string, but the Jinja documentation doesn't seem clear enough for me to figure it out. core. As of Ansible 2. To cast values as certain types, such as when you input a string as “True” from a vars_prompt and the system doesn’t know it is a boolean value. from_string("{{ version|version_compare('2. This solution may only work for a version of ansible 1. As for the comparison, yeah, that is the way to do it. filters['version_compare'] = version_compare template = env. The value of "directory" should literally be "$(temp)" here. 5 >= 6. This test plugin is part of ansible-core and included in all Ansible installations. Mar 16, 2021 · It is not possible with the core format filter. The whitespace at the end is causing the comparison to go false. plugins. Dec 27, 2023 · So you started learning Ansible and began writing your first playbooks and templates. 13. 18. The optional_tags should have a value if and only if {{ machine_type }} matches one of many different strings. core import version_compare from jinja2 import Environment env = Environment() env. 37. Commented Mar 6, jinja2 string comparison when one value is null? 0. May 30, 2017 · You are using a Jinja2 expression. The syntax for using a jinja test is as follows: I have two lists of strings in my ansible playbook, and I'm trying to find the elements in list A that aren't in list B - a set difference. Use when: var | length == 0 instead of when: var == "". May 11, 2016 · In your example you are applying the ternary filter to the 'true' string. stdout_lines | select Mar 24, 2021 · Ansible Jinja2 string comparison. You need to enclose the equality operator-clause in parentheses: Oct 26, 2016 · The question was for Jinja2, there is no mention of Ansible in the question. yml I want to load in some variables in my role dependeing on the value of environment. 10. Oct 17, 2016 · I am getting value of variable "env" in Jinja2 template file using a variable defined in group_vars like: env: "{{ defined_variable. For example, you can create a template for a configuration file, then deploy that configuration file to multiple environments and supply the correct data (IP address, hostname Output Django v1. passwd: compat {% if openldap_nsswitch contains passwd %}ldap{% endif %} How can I write a string only if my list contains a specific element? Mar 24, 2012 · Jinja2 also defines the ~ operator, which automatically converts arguments to string first, as an alternative to the + operator. I don't think you're comparing the strings you think you are. Introduction; Adding variables to a configuration file. 5' in string comparison. 5' is greater than '110. 4. Something like this: my_string = 'stuff, stuff, stuff, stuff' I already know about loop. 6 days ago · The main difference between tests and filters are that Jinja tests are used for comparisons, whereas filters are used for data manipulation, and have different applications in jinja. – Gino Mempin. 17 I want to compare bin_version with 1 decimal value(6. Ask Question Asked 2 years, 2 months ago. Something similar to this would work and be contained within an Ansible role: To compare a version number, such as checking if the ansible_distribution_version version is greater than or equal to ‘12. slug %} See Other operators or, if you really want to use str, modify the Environment. yml when: environment | staging and Sep 14, 2017 · ISSUE TYPE Bug Report COMPONENT NAME Ansible Filters (based off of Jinja2 "builtin filters") ANSIBLE VERSION $ ansible --version ansible 2. . 0', 'ge') }}") result = template Apr 29, 2022 · Here, we are asking Jinja2 to loop over each element in the ansible fact named ansible_all_ipv4_addresses, which is a list, and for each iteration of the for loop, assign the current value from the list to the variable named ip. The asking is to basicallyensure that an item is included in the resulting template output, only if the IP addresses of 2 hosts in the inventory are not identical. 2. x, since the ansible 2. The version_compare filter can also be used to evaluate the ansible_distribution_version : When deploying with ansible, There's 1 specific case where I need to strip a string of a trailing -p substring. The current version can report: In ansible, changed_when, Dec 8, 2011 · But it's better to compare directly in Jinja2, without converting the boolean to a string, not @Andrew? I think the @mrroot5 answer would be the easier and better way to test if a boolean is true or false. Effectively you are comparing the value of expose_service with the string 'NodePort' and always get false in result. You have a few options. See Re-using Ansible artifacts for more information on reuse in Ansible. j2 file, I have a line that I want to look like this: tags: {{ perm_tags }} {{ optional_tags}}. 7) so I'm splitti I want to check for the presence of the string 'no' at the beginning of another string and is followed by a space. 6 days ago · Ansible executes these conditional statements differently for dynamic reuse (includes) and static reuse (imports). 93" 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 official Jinja2 template documentation. when: not destroy should do the trick. strip() function in a list of strings? Nov 24, 2020 · This happens because you are nesting a expression delimiter {{in a statement delimiter {% in Jinja here: {% for count in {{ country }} %} {# ^--- right there #} Aug 16, 2022 · Using variables within quoted strings in Ansible. You'll learn about essential Jinja2 filters for Ansible, such as string manipulation, data transformation, and conditional logic, and discover how to use them to streamline your infrastructure automation processes. In your expression, you are comparing a string {{ item }} with a string {{ airflow_dag_folder }}. Red Hat Ansible is a powerful automation tool. I have to compare the output to an existing variable list. author }} again with the value "test". Modified 2 years, 2 months ago. Concatenation. Step 1: Creating a Jinja template; Step 2: Using the Ansible template Oct 9, 2016 · I am trying to convert a string that has been parsed using a regex into a number so I can multiply it, using Jinja2. utc. Tested using Ansible 2. Comparisons are used in many places with Ansible. Tests can also be used in list processing filters, like map() and select() to choose items in the list. Historically Ansible has registered tests as both jinja tests and jinja filters, allowing for them to be referenced using filter syntax. Ansible itself isn't going to read that readlink at all. We started checking Ansible as a configuration manager (the AWX Project). 1 2 is greater than or equal to 1 2 is greater than or equal to 2 Output Jinja2 v2. The now() function supports 2 arguments:. In most cases, you can use the short plugin name bool. As already referenced in the variables section, Ansible uses Jinja2 templating to enable dynamic expressions and access to variables. The syntax for using a jinja test is as follows:. For instance I want the output in form of "10. You can also use Python methods to transform data. 9. 0 (stable-2. Jun 25, 2018 · When I try to run some commands on nxos devices, the output has a white space at the end. There is no need to use the bool Jinja filter if the value of the variable is defined under hostvars. 0. May 27, 2022 · Templating (Jinja2) ¶. split('-')[0] }}" env possible three values could be abc, def, xyz. This, however, is not the preferred way to concatenate strings! Apr 18, 2017 · I am trying to compare the values of 2 inventory file based hosts' hostvars magic variables in an Ansible Jinja Template. Jun 4, 2015 · @AntonisChristofides - in my . 5. I want to use this logic in a jinja template. strftime for easy linking to the plugin documentation and to avoid conflicting with other collections that may have the same filter plugin name. 04’, you can use the version_compare filter. We are currently based on a Chef Infra configuration manager. Ansible greatly expands the number of filters and tests available, as well as adding a new plugin type: lookups. Nov 29, 2017 · The list is of string: openldap_nsswitch: - group - hosts - passwd - shadow If the string is in the list I want to output something in the template. Inside a Jinja template context, just Templating (Jinja2) ¶ As already referenced in the variables section, Ansible uses Jinja2 templating to enable dynamic expressions and access to variables. 4 2439dc24e9) last updated 2017/09/14 09:1 Feb 5, 2015 · In Jinja2, you can use regex_search() to do a regular expression test of your string: field | regex_search("^i-") will return true if your string has "i-" and the beginning of the line represented by the caret "^" symbol. I don't want to match when the this string is part of a word and not at the beginning of the string. zhikhz lbox imnvhcwh vejecsw kgu azzuzrr ctsjg xmfvo qioe kcunrn