2bdf975d5b
buildPodRef creates a unique key with the {podName, namespace, UID}
tuple. By omitting the UID in the metric, duplicate metrics can be sent
to prometheus causing 500's on the /metrics endpoint.
80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package collectors
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import (
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"github.com/prometheus/client_golang/prometheus"
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"k8s.io/klog"
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statsapi "k8s.io/kubernetes/pkg/kubelet/apis/stats/v1alpha1"
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)
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var (
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descLogSize = prometheus.NewDesc(
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"kubelet_container_log_filesystem_used_bytes",
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"Bytes used by the container's logs on the filesystem.",
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[]string{
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"uid",
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"namespace",
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"pod",
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"container",
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}, nil,
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)
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)
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type logMetricsCollector struct {
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podStats func() ([]statsapi.PodStats, error)
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}
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// NewLogMetricsCollector implements the prometheus.Collector interface and
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// exposes metrics about container's log volume size.
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func NewLogMetricsCollector(podStats func() ([]statsapi.PodStats, error)) prometheus.Collector {
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return &logMetricsCollector{
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podStats: podStats,
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}
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}
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// Describe implements the prometheus.Collector interface.
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func (c *logMetricsCollector) Describe(ch chan<- *prometheus.Desc) {
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ch <- descLogSize
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}
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// Collect implements the prometheus.Collector interface.
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func (c *logMetricsCollector) Collect(ch chan<- prometheus.Metric) {
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podStats, err := c.podStats()
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if err != nil {
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klog.Errorf("failed to get pod stats: %v", err)
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return
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}
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for _, ps := range podStats {
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for _, c := range ps.Containers {
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if c.Logs != nil && c.Logs.UsedBytes != nil {
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ch <- prometheus.MustNewConstMetric(
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descLogSize,
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prometheus.GaugeValue,
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float64(*c.Logs.UsedBytes),
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ps.PodRef.UID,
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ps.PodRef.Namespace,
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ps.PodRef.Name,
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c.Name,
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)
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}
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}
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}
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}
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