Add a nodehealth command

nodehealth grabs the health summary of a node and provides some detail in 'not ok' condition.

confluent_client/bin/nodehealth

@@ -0,0 +1,69 @@
+#!/usr/bin/env python
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2015 Lenovo
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import codecs
+import os
+import sys
+
+path = os.path.dirname(os.path.realpath(__file__))
+path = os.path.realpath(os.path.join(path, '..', 'lib', 'python'))
+if path.startswith('/opt'):
+    sys.path.append(path)
+
+import confluent.client as client
+
+sys.stdout = codecs.getwriter('utf8')(sys.stdout)
+
+noderange = sys.argv[1]
+
+session = client.Command()
+exitcode = 0
+healthbynode = {}
+healthexplanations = {}
+for health in session.read('/noderange/{0}/health/hardware'.format(noderange)):
+    if 'error' in health:
+        sys.stderr.write(health['error'] + '\n')
+        if 'errorcode' in health:
+            exitcode |= health['errorcode']
+        else:
+            exitcode |= 1
+        continue
+    if 'databynode' not in health:
+        continue
+    health = health['databynode']
+    for node in health:
+        if 'health' in health[node]:
+            healthbynode[node] = health[node]['health']['value']
+        if 'sensors' in health[node]:
+            healthexplanations[node] = []
+            for sensor in health[node]['sensors']:
+                explanation = sensor['name'] + ':'
+                if sensor['value'] is not None:
+                    explanation += sensor['value']
+                    if sensor['units'] is not None:
+                        explanation += sensor['units']
+                if sensor['states']:
+                    explanation += ','.join(sensor['states'])
+                healthexplanations[node].append(explanation)
+        if node in healthbynode and node in healthexplanations:
+            if healthexplanations[node]:
+                print('{0}: {1} ({2})'.format(
+                    node, healthbynode[node],
+                    ','.join(healthexplanations[node])))
+            else:
+                print('{0}: {1}'.format(node, healthbynode[node]))
+

confluent_client/confluent/client.py

@@ -88,16 +88,20 @@ class Command(object):
                     rc |= res[node]['errorcode']
                 else:
                     rc |= 1
-            else:
+            elif ikey in res[node]:
                 print('{0}: {1}'.format(node, res[node][ikey]['value']))
         return rc
 
-    def simple_noderange_command(self, noderange, resource, input=None):
+    def simple_noderange_command(self, noderange, resource, input=None,
+                                 key=None):
         rc = 0
         if resource[0] == '/':
             resource = resource[1:]
         # The implicit key is the resource basename
-        ikey = resource.rpartition('/')[-1]
+        if key is None:
+            ikey = resource.rpartition('/')[-1]
+        else:
+            ikey = key
         if input is None:
             for res in self.read('/noderange/{0}/{1}'.format(
                     noderange, resource)):