How to manage resource tags using azure cli and frame conditions on that

 update tag in vm: https://learn.microsoft.com/en-us/azure/virtual-machines/tag-cli

tag any resource azure: https://learn.microsoft.com/en-us/cli/azure/tag?view=azure-cli-latest

To list all tags in a VM:

az vm show --resource-group myresourcegroup --name Installshield --query tags

update a tag in a VM:

az vm update --resource-group myresourcegroup --name Installshield --set tags.purpose="Build Process of DM and Mart" tags.usage=0

Above is specific to VM resource, below commands is for any type of resource, but using VMs for explanation.

to list all tags:

az tag list --resource-id /subscriptions/mysubscriptionid/resourcegroups/myresourcegroup/providers/Microsoft.Compute/virtualMachines/Installshield

update a tag:

az tag update --resource-id /subscriptions/mysubscriptionid/resourcegroups/myresourcegroup/providers/Microsoft.Compute/virtualMachines/Installshield --operation replace --tags usage=1

Get the value of a tag, using jq command for linux.

az tag list --resource-id /subscriptions/mysubscriptionid/resourcegroups/myresourcegroup/providers/Microsoft.Compute/virtualMachines/Installshield | jq -r '.properties.tags.usage'

you can store it to a variable also:

insstatus="$(az tag list --resource-id /subscriptions/mysubscriptionid/resourcegroups/myresourcegroup/providers/Microsoft.Compute/virtualMachines/Installshield | jq -r '.properties.tags.usage')"

or can frame conditions also based on the value:

if [ -z ${insstatus+x} ]; 

then 

  echo "insstatus is unset"; 

else 

  echo "insstatus is set to '$insstatus'"; 

  if [ $insstatus -ge 1 ]; then

    echo "greater than or equal to 0"

  else

    echo "zero or negative"

  fi

fi

((insstatus=insstatus+1))

if [ -z ${insstatus+x} ]; 

then 

  echo "insstatus is unset"; 

else 

  echo "insstatus is set to '$insstatus'"; 

  if [ $insstatus -ge 1 ]; then

    echo "greater than or equal to 0"

  else

    echo "zero or negative"

  fi

fi

Reference links:

https://linuxize.com/post/bash-increment-decrement-variable/

https://unix.stackexchange.com/questions/212183/how-do-i-check-if-a-variable-exists-in-an-if-statement

https://askubuntu.com/questions/1042659/how-to-check-if-a-value-is-greater-than-or-equal-to-another

json links:

https://unix.stackexchange.com/questions/493834/how-to-extract-a-value-from-json-response-using-shell-script

https://medium.com/swlh/different-ways-to-handle-json-in-a-linux-shell-81183bc2c9bc