Activemq: check health status using REST API

activemq.txt

$curl http://localhost:8161/api/jolokia/read/org.apache.activemq:type=Broker,brokerName=localhost,service=Health

{"timestamp":1449776947,"status":200,"request":{"mbean":"org.apache.activemq:brokerName=localhost,service=Health,type=Broker","type":"read"},"value":{"CurrentStatus":"Good"}}

Reading the status doesn't actually checks the status it just reads the last know status. It is better to execute the method healthStatus() that will check the status and returns the new status.

Here is the final script I'm using:

#!/bin/bash

# Check health status
STATUS="$(curl -u admin:admin -s http://localhost:8161/api/jolokia/exec/org.apache.activemq:type=Broker,brokerName=localhost,service=Health/healthStatus | jq -r '.value')"

if [ "$STATUS" != "Good" ]; then
   ACTIVEMQ_PID="$(cat /opt/activemq/data/activemq.pid)"
   echo "WARNING: Killing ActiveMQ with $ACTIVEMQ_PID"
   # Killing the process
   # systemd should restart the process as I have the property restart=Always
   # if not make sure to start the process again
   kill -9 $ACTIVEMQ_PID 
else
   echo "INFO: ActiveMQ up and running."
fi

Hi,

What Can I use to replace this "jq -r" from the healthcheck?, I read somewhere that sed will do the same, but I´m not familiar with it.

Thanks.

sed /can/ do the same thing, but sed doesn't understand json. You'll have to do some regex-fu in order to get a similar result. jq is like sed but with the added luxury of understanding json, so regardless of extra lines or other possible strange formatting, jq, in this case, will output the whole value of the 'value' member of the json being fed in (or nothing/error if the json is invalid or doesn't contain a member named 'value')

I do not have jq installed in my docker image so I use much simpler version:

curl --silent --show-error "http://localhost:8161/api/jolokia/exec/org.apache.activemq:type=Broker,brokerName=localhost,service=Health/healthStatus" | tee /dev/tty | grep --silent 'Good'

The exit status give OK/KO condition.