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Add log usage metrics for containers #2

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Jan 13, 2021
Merged

Add log usage metrics for containers #2

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22 changes: 14 additions & 8 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -28,11 +28,17 @@ Here's an example scrape config. This assumes that the exporter is available at

## Metrics

| Metric | Description | Labels |
| --------------------------------------------- | ----------------------------------------------------- | -------------------- |
| kube_summary_container_rootfs_inodes_free | Number of available Inodes | pod, namespace, name |
| kube_summary_container_rootfs_inodes | Number of Inodes | pod, namespace, name |
| kube_summary_container_rootfs_inodes_used | Number of used Inodes | pod, namespace, name |
| kube_summary_container_rootfs_available_bytes | Number of bytes that aren't consumed by the container | pod, namespace, name |
| kube_summary_container_rootfs_capacity_bytes | Number of bytes that can be consumed by the container | pod, namespace, name |
| kube_summary_container_rootfs_used_bytes | Number of bytes that are consumed by the container | pod, namespace, name |
| Metric | Description | Labels |
| --------------------------------------------- | ---------------------------------------------------------- | -------------------- |
| kube_summary_container_logs_inodes_free | Number of available Inodes for logs | pod, namespace, name |
| kube_summary_container_logs_inodes | Number of Inodes for logs | pod, namespace, name |
| kube_summary_container_logs_inodes_used | Number of used Inodes for logs | pod, namespace, name |
| kube_summary_container_logs_available_bytes | Number of bytes that aren't consumed by the container logs | pod, namespace, name |
| kube_summary_container_logs_capacity_bytes | Number of bytes that can be consumed by the container logs | pod, namespace, name |
| kube_summary_container_logs_used_bytes | Number of bytes that are consumed by the container logs | pod, namespace, name |
| kube_summary_container_rootfs_inodes_free | Number of available Inodes | pod, namespace, name |
| kube_summary_container_rootfs_inodes | Number of Inodes | pod, namespace, name |
| kube_summary_container_rootfs_inodes_used | Number of used Inodes | pod, namespace, name |
| kube_summary_container_rootfs_available_bytes | Number of bytes that aren't consumed by the container | pod, namespace, name |
| kube_summary_container_rootfs_capacity_bytes | Number of bytes that can be consumed by the container | pod, namespace, name |
| kube_summary_container_rootfs_used_bytes | Number of bytes that are consumed by the container | pod, namespace, name |
92 changes: 92 additions & 0 deletions main.go
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Expand Up @@ -26,6 +26,72 @@ var metricsNamespace = "kube_summary"
// collectSummaryMetrics collects metrics from a /stats/summary response
func collectSummaryMetrics(summary *stats.Summary, registry *prometheus.Registry) {
var (
containerLogsInodesFree = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Name: "container_logs_inodes_free",
Help: "Number of available Inodes for logs",
},
[]string{
"pod",
"namespace",
"name",
},
)
containerLogsInodes = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Name: "container_logs_inodes",
Help: "Number of Inodes for logs",
},
[]string{
"pod",
"namespace",
"name",
},
)
containerLogsInodesUsed = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Name: "container_logs_inodes_used",
Help: "Number of used Inodes for logs",
},
[]string{
"pod",
"namespace",
"name",
},
)
containerLogsAvailableBytes = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Name: "container_logs_available_bytes",
Help: "Number of bytes that aren't consumed by the container logs",
},
[]string{
"pod",
"namespace",
"name",
},
)
containerLogsCapacityBytes = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Name: "container_logs_capacity_bytes",
Help: "Number of bytes that can be consumed by the container logs",
},
[]string{
"pod",
"namespace",
"name",
},
)
containerLogsUsedBytes = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Name: "container_logs_used_bytes",
Help: "Number of bytes that are consumed by the container logs",
},
[]string{
"pod",
"namespace",
"name",
},
)
containerRootFsInodesFree = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricsNamespace,
Name: "container_rootfs_inodes_free",
Expand Down Expand Up @@ -94,6 +160,12 @@ func collectSummaryMetrics(summary *stats.Summary, registry *prometheus.Registry
)
)
registry.MustRegister(
containerLogsInodesFree,
containerLogsInodes,
containerLogsInodesUsed,
containerLogsAvailableBytes,
containerLogsCapacityBytes,
containerLogsUsedBytes,
containerRootFsInodesFree,
containerRootFsInodes,
containerRootFsInodesUsed,
Expand All @@ -104,6 +176,26 @@ func collectSummaryMetrics(summary *stats.Summary, registry *prometheus.Registry

for _, pod := range summary.Pods {
for _, container := range pod.Containers {
if logs := container.Logs; logs != nil {
if inodesFree := logs.InodesFree; inodesFree != nil {
containerLogsInodesFree.WithLabelValues(pod.PodRef.Name, pod.PodRef.Namespace, container.Name).Set(float64(*inodesFree))
}
if inodes := logs.Inodes; inodes != nil {
containerLogsInodes.WithLabelValues(pod.PodRef.Name, pod.PodRef.Namespace, container.Name).Set(float64(*inodes))
}
if inodesUsed := logs.InodesUsed; inodesUsed != nil {
containerLogsInodesUsed.WithLabelValues(pod.PodRef.Name, pod.PodRef.Namespace, container.Name).Set(float64(*inodesUsed))
}
if availableBytes := logs.AvailableBytes; availableBytes != nil {
containerLogsAvailableBytes.WithLabelValues(pod.PodRef.Name, pod.PodRef.Namespace, container.Name).Set(float64(*availableBytes))
}
if capacityBytes := logs.CapacityBytes; capacityBytes != nil {
containerLogsCapacityBytes.WithLabelValues(pod.PodRef.Name, pod.PodRef.Namespace, container.Name).Set(float64(*capacityBytes))
}
if usedBytes := logs.UsedBytes; usedBytes != nil {
containerLogsUsedBytes.WithLabelValues(pod.PodRef.Name, pod.PodRef.Namespace, container.Name).Set(float64(*usedBytes))
}
}
if rootfs := container.Rootfs; rootfs != nil {
if inodesFree := rootfs.InodesFree; inodesFree != nil {
containerRootFsInodesFree.WithLabelValues(pod.PodRef.Name, pod.PodRef.Namespace, container.Name).Set(float64(*inodesFree))
Expand Down