Merge pull request #332 from stefan-mees/master

riak agent checks

checks.d/riak.py

@@ -0,0 +1,110 @@
+import time
+
+from checks import AgentCheck
+from util import md5
+from util import json
+
+from checks.libs.httplib2 import Http, HttpLib2Error
+import socket
+
+class Riak(AgentCheck):
+
+    keys = [
+        "vnode_gets",
+        "vnode_puts",
+        "vnode_index_reads",
+        "vnode_index_writes",
+        "vnode_index_deletes",
+        "node_gets",
+        "node_puts",
+        "pbc_active",
+        "pbc_connects",
+        "memory_total",
+        "memory_processes",
+        "memory_processes_used",
+        "memory_atom",
+        "memory_atom_used",
+        "memory_binary",
+        "memory_code",
+        "memory_ets",
+        "read_repairs",
+    ]
+
+    stat_keys = [
+        "node_get_fsm_siblings",
+        "node_get_fsm_objsize",
+        "node_get_fsm_time",
+        "node_put_fsm_time"
+      ]
+
+    def __init__(self, name, init_config, agentConfig, instances=None):
+        AgentCheck.__init__(self, name, init_config, agentConfig, instances)
+        for k in ["mean", "median", "95", "99", "100"]:
+            [self.keys.append(m + "_" + k) for m in self.stat_keys]
+
+        self.prev_coord_redirs_total = -1
+
+
+    def check(self, instance):
+        url             = instance['url']
+        default_timeout = self.init_config.get('default_timeout', 5)
+        timeout         = float(instance.get('timeout', default_timeout))
+
+        aggregation_key = md5(url).hexdigest()
+
+        try:
+            h = Http(timeout=timeout)
+            resp, content = h.request(url, "GET")
+
+        except socket.timeout, e:
+            self.timeout_event(url, timeout, aggregation_key)
+            return
+
+        except socket.error, e:
+            self.timeout_event(url, timeout, aggregation_key)
+            return
+
+        except HttpLib2Error, e:
+            self.timeout_event(url, timeout, aggregation_key)
+            return
+
+        if resp.status != 200:
+            self.status_code_event(url, r, aggregation_key)
+
+        stats = json.loads(content)
+
+        [self.gauge("riak." + k, stats[k]) for k in self.keys if k in stats]
+
+        coord_redirs_total = stats["coord_redirs_total"]
+        if self.prev_coord_redirs_total > -1:
+            count = coord_redirs_total - self.prev_coord_redirs_total
+            self.gauge('riak.coord_redirs', count)
+
+        self.prev_coord_redirs_total = coord_redirs_total
+
+        def timeout_event(self, url, timeout, aggregation_key):
+            self.event({
+                'timestamp': int(time.time()),
+                'event_type': 'riak_check',
+                'msg_title': 'riak check timeout',
+                'msg_text': '%s timed out after %s seconds.' % (url, timeout),
+                'aggregation_key': aggregation_key
+            })
+
+        def status_code_event(self, url, r, aggregation_key):
+            self.event({
+                'timestamp': int(time.time()),
+                'event_type': 'riak_check',
+                'msg_title': 'Invalid reponse code for riak check',
+                'msg_text': '%s returned a status of %s' % (url, r.status_code),
+                'aggregation_key': aggregation_key
+            })
+
+if __name__ == '__main__':
+    check, instances = Riak.from_yaml('/etc/dd-agent/conf.d/riak.yaml')
+    for instance in instances:
+        print "\nRunning the check against url: %s" % (instance['url'])
+        check.check(instance)
+        if check.has_events():
+            print 'Events: %s' % (check.get_events())
+        print 'Metrics: %s' % (check.get_metrics())

conf.d/riak.yaml.example

@@ -0,0 +1,4 @@
+init_config:
+
+instances:
+#  - url: http:127.0.0.1:8098/stats