Created
February 19, 2020 20:55
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Get user assigned Azure Managed Identity from running VM by curl (with default MSI)
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| #!/usr/bin/env sh | |
| function main() { | |
| local defaultMsi=$1 | |
| access_token=$(curl -s -k -H "Metadata: true" "http://169.254.169.254/metadata/identity/oauth2/token?api-version=2018-02-01&resource=https://management.azure.com/" | jq .access_token | tr -d '"') | |
| access_token_status=$? | |
| if [[ "${access_token_status}" != "0" ]]; then | |
| echo "$defaultMsi" | |
| return 0 | |
| fi | |
| instance_metadata=$(curl -s -k -H "Metadata: true" "http://169.254.169.254/metadata/instance?api-version=2019-06-01") | |
| instance_metadata_status=$? | |
| if [[ "${instance_metadata_status}" != "0" ]]; then | |
| echo "$defaultMsi" | |
| return 0 | |
| fi | |
| subscriptionId=$(echo "${instance_metadata}" | jq .compute.subscriptionId | tr -d '"') | |
| resourceGroup=$(echo "${instance_metadata}" | jq .compute.resourceGroupName | tr -d '"') | |
| vmName=$(echo "${instance_metadata}" | jq .compute.name | tr -d '"') | |
| vmMsiResponse=$(curl -s -k "https://management.azure.com/subscriptions/${subscriptionId}/resourceGroups/${resourceGroup}/providers/Microsoft.Compute/virtualMachines/${vmName}?api-version=2018-06-01" -H "Authorization: Bearer ${access_token}") | |
| vmMsiResponse_status=$? | |
| if [[ "${vmMsiResponse_status}" != "0" ]]; then | |
| echo "$defaultMsi" | |
| return 0 | |
| fi | |
| vmAuthFeiled=$(echo "${vmMsiResponse}" | grep -q "AuthorizationFailed") | |
| vmAuthFeiled_status=$? | |
| if [[ "${vmAuthFeiled_status}" == "0" ]]; then | |
| echo "$defaultMsi" | |
| return 0 | |
| fi | |
| vmMsi=$(echo "${vmMsiResponse}" | jq -r '.identity.userAssignedIdentities | keys[] as $k | "\($k)"' ) | |
| vmMsi_status=$? | |
| if [[ "${vmMsi_status}" != "0" ]]; then | |
| echo "$defaultMsi" | |
| return 0 | |
| fi | |
| echo "$vmMsi" | |
| } | |
| main "$@" |
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