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Activemq: check health status using REST API
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| $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"}} |
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.
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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')