{"action":"created","comment":{"url":"https://api.github.com/repos/kubernetes/kubernetes/pulls/comments/38394168","id":38394168,"diff_hunk":"@@ -0,0 +1,205 @@\n+/*\n+Copyright 2015 The Kubernetes Authors All rights reserved.\n+\n+Licensed under the Apache License, Version 2.0 (the \"License\");\n+you may not use this file except in compliance with the License.\n+You may obtain a copy of the License at\n+\n+    http://www.apache.org/licenses/LICENSE-2.0\n+\n+Unless required by applicable law or agreed to in writing, software\n+distributed under the License is distributed on an \"AS IS\" BASIS,\n+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n+See the License for the specific language governing permissions and\n+limitations under the License.\n+*/\n+\n+package initialresources\n+\n+import (\n+\t\"flag\"\n+\t\"fmt\"\n+\t\"strings\"\n+\t\"sync\"\n+\t\"time\"\n+\n+\t\"github.com/golang/glog\"\n+\tinfluxdb \"github.com/influxdb/influxdb/client\"\n+\t\"k8s.io/kubernetes/pkg/api\"\n+)\n+\n+const (\n+\tcpuSeriesName      = \"autoscaling.cpu.usage.1m\"\n+\tmemSeriesName      = \"autoscaling.memory.usage.1m\"\n+\tcpuContinuousQuery = \"select derivative(value) as value from \\\"cpu/usage_ns_cumulative\\\" where pod_id <> '' group by pod_id, container_name, container_base_image, time(1m) into \" + cpuSeriesName\n+\tmemContinuousQuery = \"select mean(value) as value from \\\"memory/usage_bytes_gauge\\\" where pod_id <> '' group by pod_id, container_name, container_base_image, time(1m) into \" + memSeriesName\n+\ttimeFormat         = \"2006-01-02 15:04:05\"\n+)\n+\n+var (\n+\tinfluxdbHost = flag.String(\"ir-influxdb-host\", \"localhost:8080/api/v1/proxy/namespaces/kube-system/services/monitoring-influxdb:api\", \"Address of InfluxDB which contains metrics requred by InitialResources\")\n+\tuser         = flag.String(\"ir-user\", \"root\", \"User used for connecting to InfluxDB\")\n+\t// TODO: figure out how to better pass password here\n+\tpassword = flag.String(\"ir-password\", \"root\", \"Password used for connecting to InfluxDB\")\n+\tdb       = flag.String(\"ir-dbname\", \"k8s\", \"InfluxDB database name which contains metrics requred by InitialResources\")\n+)\n+\n+// WARNING: If you are planning to add another implementation of dataSource interface please bear in mind,\n+// that dataSource will be moved to Heapster some time in the future and possibly rewritten.\n+type dataSource interface {\n+\t// Returns <perc>th of sample values which represent usage of <kind> for containers running <image>,\n+\t// withing time range (start, end), number of samples considered and error if occured.\n+\t// If <exactMatch> then take only samples that concern the same image (both name and take are the same),\n+\t// otherwise consider also samples with the same image a possibly different tag.\n+\tGetUsagePercentile(kind api.ResourceName, perc int64, image string, exactMatch bool, start, end time.Time) (usage int64, samples int64, err error)\n+}\n+\n+func newDataSource(kind string) (dataSource, error) {\n+\tif kind == \"influxdb\" {\n+\t\treturn newInfluxdbSource(*influxdbHost, *user, *password, *db)\n+\t}\n+\tif kind == \"gcm\" {\n+\t\treturn newGcmSource()\n+\t}\n+\treturn nil, fmt.Errorf(\"Unknown data source %v\", kind)\n+}\n+\n+// TODO(piosz): rewrite this once we will migrate into InfluxDB v0.9.\n+type influxdbSource struct {\n+\tconf *influxdb.ClientConfig\n+\tconn *influxdb.Client\n+\t// protects <conn>\n+\tmutex sync.RWMutex\n+}\n+\n+func newInfluxdbSource(host, user, password, db string) (dataSource, error) {\n+\tconf := &influxdb.ClientConfig{\n+\t\tHost:     host,\n+\t\tUsername: user,\n+\t\tPassword: password,\n+\t\tDatabase: db,\n+\t}\n+\tsource := &influxdbSource{\n+\t\tconf:  conf,\n+\t\tmutex: sync.RWMutex{},\n+\t}\n+\tgo source.ensureDbConnection()\n+\treturn source, nil\n+}\n+\n+func ensureSeriesExists(conn *influxdb.Client, existingQueries *influxdb.Series, seriesName, contQuery string) error {\n+\tqueryExists := false\n+\tfor _, p := range existingQueries.GetPoints() {\n+\t\tid := p[1].(float64)\n+\t\tquery := p[2].(string)\n+\t\tif strings.Contains(query, \"into \"+seriesName) {\n+\t\t\tif query != contQuery {\n+\t\t\t\tif _, err := conn.Query(fmt.Sprintf(\"drop continuous query %v\", id), influxdb.Second); err != nil {\n+\t\t\t\t\treturn err\n+\t\t\t\t}\n+\t\t\t} else {\n+\t\t\t\tqueryExists = true\n+\t\t\t}\n+\t\t}\n+\t}\n+\tif !queryExists {\n+\t\tif _, err := conn.Query(\"drop series \"+seriesName, influxdb.Second); err != nil {\n+\t\t\treturn err\n+\t\t}\n+\t\tif _, err := conn.Query(contQuery, influxdb.Second); err != nil {\n+\t\t\treturn err\n+\t\t}\n+\t}\n+\treturn nil\n+}\n+\n+func ensureAutoscalingSeriesExist(conn *influxdb.Client) error {\n+\tseries, err := conn.Query(\"list continuous queries\", influxdb.Second)\n+\tif err != nil {\n+\t\treturn err\n+\t}\n+\tif err := ensureSeriesExists(conn, series[0], cpuSeriesName, cpuContinuousQuery); err != nil {\n+\t\treturn err\n+\t}\n+\tif err := ensureSeriesExists(conn, series[0], memSeriesName, memContinuousQuery); err != nil {\n+\t\treturn err\n+\t}\n+\treturn nil\n+}\n+\n+// TODO add connection check here and make this running all the time\n+func (s *influxdbSource) ensureDbConnection() {\n+\tfor s.conn == nil {\n+\t\ttime.Sleep(30 * time.Second)\n+\t\tclient, err := influxdb.NewClient(s.conf)\n+\t\tif err != nil {\n+\t\t\tglog.Errorf(\"Error while trying to create InfluxDB client: %v\", err)\n+\t\t\tcontinue\n+\t\t}\n+\t\tif err := ensureAutoscalingSeriesExist(client); err != nil {\n+\t\t\tglog.Errorf(\"Error while trying to create create autoscaling series: %v\", err)\n+\t\t\tcontinue\n+\t\t}\n+\t\ts.mutex.Lock()\n+\t\ts.conn = client\n+\t\ts.mutex.Unlock()\n+\t}\n+}\n+\n+func (s *influxdbSource) query(query string, precision ...influxdb.TimePrecision) ([]*influxdb.Series, error) {\n+\ts.mutex.RLock()","path":"plugin/pkg/admission/initialresources/data_source.go","position":150,"original_position":150,"commit_id":"b51c9ce95892f1e9b0abb66c6816725efc9aa3f9","original_commit_id":"b51c9ce95892f1e9b0abb66c6816725efc9aa3f9","user":{"login":"piosz","id":10819974,"avatar_url":"https://avatars.githubusercontent.com/u/10819974?v=3","gravatar_id":"","url":"https://api.github.com/users/piosz","html_url":"https://github.com/piosz","followers_url":"https://api.github.com/users/piosz/followers","following_url":"https://api.github.com/users/piosz/following{/other_user}","gists_url":"https://api.github.com/users/piosz/gists{/gist_id}","starred_url":"https://api.github.com/users/piosz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/piosz/subscriptions","organizations_url":"https://api.github.com/users/piosz/orgs","repos_url":"https://api.github.com/users/piosz/repos","events_url":"https://api.github.com/users/piosz/events{/privacy}","received_events_url":"https://api.github.com/users/piosz/received_events","type":"User","site_admin":false},"body":"The InfluxDB client is actually http client, which is thread 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