Check system status for Smart ID Messaging

1. To check that Hermod is alive, and view the running instance id and version, use the following command. Make sure to use the correct port:

   Example: Health check

   CODE

   GET https://my-hermod-server:20400/<contextPath>/info
    
   Response 200 OK
   Body
   {
      "id":"hermod.6d99c1",
      "build":{
         "version":"2.0.0.RELEASE",
         "artifact":"cod-hermod",
         "name":"Cod Hermod",
         "group":"com.nexusgroup.cod.hermod",
         "time":1497432675000
      }
   }

1. To check health information and status for the running Hermod, use the following command. Make sure to use the correct port: 

   Example: Health check

   CODE

   GET https://my-hermod-server:20400/<contextPath>/health
   
   {
     "status":"UP",
     "diskSpace":{
        "status":"UP",
        "total":15442378752,
        "free":2757484544,
        "threshold":10485760
     },
     "db":{
        "status":"UP",
        "database":"PostgreSQL",
        "hello":1
     },  
   
     "configServer":{
        "status":"UP",
     },
     "hystrix":{     
        "status":"UP" 
     }
   }

These are the built-in statuses:

1. To check the logs:

   Example: Check logs

   TEXT

   # Login to the host
   ssh user@machine
   su - docker
    
   # Check logs
   cd compose/hermod
   docker-compose logs -f --tail=100

Hermod stores metrics since the last restart. These can be viewed via a http request.

1. To view the Hermod metrics:

   Example: Check metrics

   TEXT

   # Find the current port for an Hermod instance (33700 in this case)
   docker-compose ps | grep hermod_hermod
   hermod_hermod_1            ./fatjar-entrypoint.sh app ...   Up      0.0.0.0:33700->20400/tcp
    
   # Use curl to get metrics (You can use https://jsonformatter.curiousconcept.com/ to format the output)
   curl  http://localhost:33600/<contextPath>/metrics
    
   {
      "mem":673568,
      "mem.free":336830,
      "processors":2,
      "instance.uptime":57997012,
      "uptime":58006488,
      "systemload.average":0.0,
      "heap.committed":579072,
      "heap.init":112640,
      "heap.used":242241,
      "heap":1585664,
      "nonheap.committed":96768,
      "nonheap.init":2496,
      "nonheap.used":94496,
      "nonheap":0,
      "threads.peak":50,
      "threads.daemon":23,
      "threads.totalStarted":2493,
      "threads":49,
      "classes":10343,
      "classes.loaded":10343,
      "classes.unloaded":0,
      "gc.ps_scavenge.count":22,
      "gc.ps_scavenge.time":294,
      "gc.ps_marksweep.count":2,
      "gc.ps_marksweep.time":142,
      ...
   }