If you are scripting a set of gcloud commands, there is a good chance that it is within a Bash script. While some Bash loops can be driven by a single variable, sometimes you need access to multiple variables within the loop. In this article I will show you can drive a Bash loop requiring … GCP: gcloud csv format with no-heading for Bash parsing
Unfortunately, with_fileglob only works on files local to the Ansible orchestrator host. It will not build a list of files from the remote directory, even if you use something like the copy module that has ‘remote_source: true’. In these situation, you can use the find module to generate a list of files on the remote … Ansible: find module to create glob of remote files
Ansible blocks provide a convenient way to logically group tasks. So it is unfortunate that native Ansible syntax does not allow looping to be combined with a block. Consider the simple conditional block below controlled by a variable ‘do_block_logic’: – name: simple block with conditional block: – name: simple block task1 debug: msg=”hello” – name: … Ansible: implementing a looping block using include_tasks
Just as in other programming languages, associative arrays in Bash are useful for search, set management, and keying into a list of values. The label may be different, but whether called “map”, “dictionary”, or “associative array”, the same concepts apply. In its simplest form, here is an initialization and then loop through the key/value pairs. … Bash: Associative array initialization and usage
The physical partitions and filesystem formats on your host are configured for your main workload, but if you want an application to use a specific filesystem (xfs, ext4, zfs) and size capacity without reconfiguration at the physical level then you can consider a loopback image. For example, if we create a 100Mb disk file named … Linux: Mounting a loopback ext4/xfs filesystem to isolate or enforce storage limits
If you are using the direct output of a command to feed a while loop in BASH, you may still want to take user input inside that loop. For example, if you need the user to confirm each line by pressing <ENTER>. Take a simple example like this: grep one test.txt | while read -r … Bash: Reading input from the console while looping over output of command
When using jinja2 for SaltStack formulas you may be surprised to find that your global scoped variables do not have ability to be modified inside a loop. Although this is counter intuitive given the scope behavior of most scripting languages it is unfortunately the case that a jinja2 globally scoped variable cannot be modified from … SaltStack: Setting a jinja2 variable from an inner block scope