Storing Output of Azure CLI command as variable

Question

I need to store the output of an AZ cli commands that fetches my private IPs as a variable.

I am using the following in a bash script:

echo "Fetching Monitoring Server IP"
SERVER_IP=$(az vm show -n ${THIS_VM_NAME} -g ${RSC_GRP_NAME} --query privateIps -o tsv)
echo "$SERVER_IP

It would appear that this isnt working as when I echo the variable, it comes back empty.

+ THIS_VM_NAME=XXXX-XX-XX-XX-XX
+ echo 'Fetching Monitoring Server IP'
Fetching Monitoring Server IP
++ az vm show -n XXXX-XX-XX-XX-XX3 -g XXXX-XX-XX-XX-XX --query privateIps -o tsv
+ SERVER_IP=
+ echo ''

I will appreciate any pointers on this

Are you sure the command is writing to stdout? Try appending 2>&1 to your command to catch stderr as well. — miken32
– miken32, Commented Nov 30, 2018 at 3:52

Charles Xu · Accepted Answer · 2018-11-30 15:46:52Z

7

Edit

The command you post lost a parameter to get the private IPs, you can use the command with the parameter -d or --show-details like this:

az vm show -g resourceGrouName -n vmName -d

But this command just gets all the IPs including the secondary IP.

You can get all the VM primary IPs of each interface through a shell script like this:

count=0
while : ; do
    nic=$(az vm nic list -g resourceGroupName --vm-name vmName --query [$count].id -o tsv)
    if [[ $nic == '' ]]; then
        break
    fi
    privateIps[$count]=$(az vm nic show -g resourceGroupName --vm-name vmName --nic $nic --query ipConfigurations[0].privateIpAddress -o tsv)
    let count++

done
echo ${privateIps[*]}

edited Nov 30, 2018 at 15:46

answered Nov 30, 2018 at 6:18

Charles Xu

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2 Comments

0xsegfault Over a year ago

This is incorrect as my command is returning the private ip. Please run the command above to see if it works on yours

Charles Xu Over a year ago

Oh, sorry. I made a mistake. I have updated the answer. And the command you post also missed a parameter. And there is something different in the two solutions.

Iman · Accepted Answer · 2021-11-29 07:57:40Z

5

A solution to my similar problem in Azure Cloud Shell was putting a dollar sign before your SERVER_IP variable if Powershell in chosen.

$SERVER_IP=$(az vm show --name vmname --resource-group rgname --show-details --query [publicIps] --output tsv)

edited Nov 29, 2021 at 7:57

answered Feb 20, 2020 at 13:10

Iman

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