Use the Kea API to retrieve data from the DHCP lease database.
An auth token is set up. If one has not been set up, log on to ncn-w001 or a worker/manager with kubectl and run the following:
export TOKEN=$(curl -s -k -S -d grant_type=client_credentials -d client_id=admin-client -d client_secret=`kubectl get secrets admin-client-auth -o jsonpath='{.data.client-secret}' | base64 -d` https://api-gw-service-nmn.local/keycloak/realms/shasta/protocol/openid-connect/token | jq -r '.access_token')
Once an auth token is generated, these commands can be run on a worker or manager node.
Get all leases:
WARNING: This may cause the terminal to crash based on the size of the output.
curl -H "Authorization: Bearer ${TOKEN}" -X POST -H "Content-Type: application/json" -d '{ "command": "lease4-get-all", "service": [ "dhcp4" ] }' https://api_gw_service.local/apis/dhcp-kea | jq
If you have the IP and are looking for the hostname/MAC address.
IP Lookup:
curl -H "Authorization: Bearer ${TOKEN}" -X POST -H "Content-Type: application/json" -d '{ "command": "lease4-get", "service": [ "dhcp4" ], "arguments": { "ip-address": "x.x.x.x" } }' https://api_gw_service.local/apis/dhcp-kea | jq
Use the MAC to find the hostname/IP Address:
curl -H "Authorization: Bearer ${TOKEN}" -X POST -H "Content-Type: application/json" -d '{ "command": "lease4-get-all", "service": [ "dhcp4" ] }' https://api_gw_service.local/apis/dhcp-kea | jq '.[].arguments.leases[] | select(."hw-address"=="XX:XX:XX:XX:XX:5d")'
Use the hostname to find the MAC/IP address:
curl -H "Authorization: Bearer ${TOKEN}" -X POST -H "Content-Type: application/json" -d '{ "command": "lease4-get-all", "service": [ "dhcp4" ] }' https://api_gw_service.local/apis/dhcp-kea | jq '.[].arguments.leases[] | select(."hostname"=="xNAME")'
View the total amount of leases:
curl -H "Authorization: Bearer ${TOKEN}" -X POST -H "Content-Type: application/json" -d '{ "command": "lease4-get-all", "service": [ "dhcp4" ] }' https://api_gw_service.local/apis/dhcp-kea | jq '.[].text'