How to use rest api to get the "Availability" attribute value of virtual server member without knowing its pool name

Hello Kartal.

To get the state of one member only using their IP, you need to use 'jq'.

# curl -sku admin https://localhost/mgmt/tm/ltm/pool?expandSubcollections=true  | jq '.items[] | select(.membersReference.items[].address == "10.100.40.112") | .membersReference.items[].state'
"down"

In my case, I have one pool called P-WEB112_80 which has one member node with IP 10.100.40.112.

# tmsh list ltm pool P-WEB112_80
ltm pool P-WEB112_80 {
    members {
        N-WEB112:http {
            address 10.100.40.112
            session monitor-enabled
            state down
        }
    }
    monitor gateway_icmp
}

This solves what you are requesting, but take into account that if this member is applied to more than one pool, you will see in the output "up" "up" or "down" "down" without any information about the pool, so in this case, you could use something like this.

# curl -sku admin https://localhost/mgmt/tm/ltm/pool?expandSubcollections=true  | jq '.items[] | select(.membersReference.items[].address == "10.100.40.111") | .name, .membersReference.items[].state'
"P-REPO_8080"
"up"
"P-WEB111_80"
"up"

If you need to collect any other field (like 'session'), you can extend the previous expression accordingly.

Regards,

Dario.