Update list_hosts.py

Worked with engineering to add support for adding the container count with the host names and also for showing a larger number of hosts. The original script only showed about 10 hosts per environment.

Author: dalejrodriguez

examples/list_hosts.py

@@ -2,15 +2,16 @@
 #
 # This script shows how to leverage sysdig's data query API to obtain the list
 # of the instrumented hosts that have been seen in the last 5 minutes.
+# Updated 1/24/2019 - Dale J. Rodriguez
+# This script will also show the container count in addition to the hostnames in a from like this: host.name 12
+# Where 12 is the container count and host.name is the host
 #
-
 import getopt
 import json
 import os
 import sys
 sys.path.insert(0, os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])), '..'))
 from sdcclient import SdcClient
-
 #
 # Parse arguments
 #
@@ -20,57 +21,38 @@ def usage():
     print '-j|--json: Print output as json'
     print 'You can find your token at https://app.sysdigcloud.com/#/settings/user'
     sys.exit(1)
-
 try:
     opts, args = getopt.getopt(sys.argv[1:],"jd:",["json", "duration="])
 except getopt.GetoptError:
     usage()
-
-duration = 600
+duration = 3600
 print_json = False
 for opt, arg in opts:
     if opt in ("-d", "--duration"):
         duration = int(arg)
     elif opt in ("-j", "--json"):
         print_json = True
-
-if len(args) != 1:
-    usage()
-
 sdc_token = args[0]
-
 #
 # Instantiate the SDC client
 #
 sdclient = SdcClient(sdc_token)
-
-#
-# Prepare the query's metrics list. In this case, we have just one metric:
-# host.hostName. This is a 'key' metric, and we don't include any number metric.
-# Essentially, we create an 'enumeration' of hostnames.
-#
-metrics = [{"id": "host.hostName"}]
-
-#
-# Fire the query.
-# Note: there's no sampling time. This means that we're requesting the result to
-#       come as a single sample.
-#
-res = sdclient.get_data(metrics, # metrics list
-                        -duration,   # cover the last duration seconds...
-                        0,      # ... ending now...
-                        duration)    # ... with just one durations sample
-
-#
-# Show the results!
-#
+metrics = [{"id": "host.hostName"}, {"id": "container.count","aggregations":{"time":"avg","group":"avg"}}]
+res = sdclient.get_data(
+    metrics, -duration, 0, duration, paging={
+        "from": 0,
+        "to": 999
+    })
 if res[0]:
-    data = res[1]
+    output = []
+    data = res[1]['data']
+    for i in range(0, len(data)):
+        sample = data[i]
+        metrics = sample['d']
+        hostName = metrics[0]
+        count = metrics[1]
+        output.append('%s\t%d' % (hostName, count))
+    print '\n'.join(output)
 else:
     print res[1]
     sys.exit(1)
-
-if print_json:
-    print json.dumps(data)
-else:
-    print data