Forum Discussion
kartal
Altostratus
AltostratusHow to use rest api to get the "Availability" attribute value of virtual server member without knowing its pool name
Hello, How can I reach pool member availability property by using rest API calling with member IP? I discover that if I call with pool name I can reach member availability but I want to access this...
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.
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.
kartalDear Dario, thank you for your detailed answer. I have one more small question: I am trying to reach F5 IP from outside and in the curl command I am taking curl: (35) schannel: SNI or certificate check failed: SEC_E_WRONG_PRINCIPAL (0x80090322) error. I also tried with -s but that time nothing returned. Can you give me an idea about it?
Use:
curl -k https://...Regards,
Dario.
Hello Kartal.
I don't know exactly what your error means. I've executed the above lines in my enviroment without issue.
I recommend you to run the command partially trying to figure out what specific part triggers the error.
## 1 curl -sku admin https://localhost/mgmt/tm/ltm/pool?expandSubcollections=true | jq ## 2 curl -sku admin https://localhost/mgmt/tm/ltm/pool?expandSubcollections=true | jq '.items[]' ## 3 curl -sku admin https://localhost/mgmt/tm/ltm/pool?expandSubcollections=true | jq '.items[] | select(.membersReference.items[].address == "10.100.40.111")' ## 4 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'Other point, before moving to a remote device, try to execute this lines in the BIG-IP. That will give a clue if this error appears everywhere or just in one specific device.
Finally, besides the error, it's good to include which lines you are executing (pasting them here). This will give me more info about if this could be caused by a syntax error.
Hope this helps.
Regards,
Dario.
Hello Kartal
It seems a problem with your jq implementation.
Check these out.
https://stackoverflow.com/questions/44985737/invalid-numeric-literal-with-jq
https://unix.stackexchange.com/questions/599900/curl-jq-get-value-from-field-name
I recommend you to search for a solucion on google, because it's a client side error (not related with F5).
Regards,
Dario.