Kubernetes Containers
Plugin: cgroups.plugin Module: /sys/fs/cgroup
Overview
Monitor containers and virtual machines resource utilization — CPU, memory, disk I/O, network, and page cache activity — via Linux cgroups.
This collector is only supported on the following platforms:
- Linux
This collector supports collecting metrics from multiple instances of this integration, including remote instances.
Kubernetes Containers can be monitored further using the following other integrations:
Default Behavior
Auto-Detection
This integration doesn't support auto-detection.
Limits
The default configuration for this integration does not impose any limits on data collection.
Performance Impact
The default configuration for this integration is not expected to impose a significant performance impact on the system.
Setup
Prerequisites
No action required.
Configuration
Options
There are no configuration options.
via File
There is no configuration file.
Examples
There are no configuration examples.
Alerts
The following alerts are available:
| Alert name | On metric | Description |
|---|---|---|
| k8s_cgroup_10min_cpu_usage | k8s.cgroup.cpu_limit | average cgroup CPU utilization over the last 10 minutes |
| k8s_cgroup_ram_in_use | k8s.cgroup.mem_usage | cgroup memory utilization |
| k8s_cgroup_1m_received_packets_rate | k8s.cgroup.net_packets | average number of packets received by the network interface ${label:device} over the last minute |
| k8s_cgroup_10s_received_packets_storm | k8s.cgroup.net_packets | ratio of average number of received packets for the network interface ${label:device} over the last 10 seconds, compared to the rate over the last minute |
Metrics
Metrics grouped by scope.
The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.
Per k8s cgroup
These metrics refer to the Pod container.
Labels:
| Label | Description |
|---|---|
| k8s_node_name | Node name. The value of pod.spec.nodeName. |
| k8s_namespace | Namespace name. The value of pod.metadata.namespace. |
| k8s_controller_kind | Controller kind (ReplicaSet, DaemonSet, StatefulSet, Job, etc.). The value of pod.OwnerReferences.Controller.Kind. |
| k8s_controller_name | Controller name.The value of pod.OwnerReferences.Controller.Name. |
| k8s_pod_name | Pod name. The value of pod.metadata.name. |
| k8s_container_name | Container name. The value of pod.spec.containers.name. |
| k8s_kind | Instance kind: "pod" or "container". |
| k8s_qos_class | QoS class (guaranteed, burstable, besteffort). |
| k8s_cluster_id | Cluster ID. The value of kube-system namespace namespace.metadata.uid. |
Metrics:
| Metric | Description | Dimensions | Unit |
|---|---|---|---|
| k8s.cgroup.cpu_limit | CPU Usage within the limits | used | percentage |
| k8s.cgroup.cpu | CPU Usage (100% = 1000 mCPU) | user, system | percentage |
| k8s.cgroup.cpu_per_core | CPU Usage (100% = 1000 mCPU) Per Core | a dimension per core | percentage |
| k8s.cgroup.throttled | CPU Throttled Runnable Periods | throttled | percentage |
| k8s.cgroup.throttled_duration | CPU Throttled Time Duration | duration | ms |
| k8s.cgroup.cpu_shares | CPU Time Relative Share | shares | shares |
| k8s.cgroup.mem | Memory Usage | cache, rss, swap, rss_huge, mapped_file | MiB |
| k8s.cgroup.writeback | Writeback Memory | dirty, writeback | MiB |
| k8s.cgroup.mem_activity | Memory Activity | in, out | MiB/s |
| k8s.cgroup.pgfaults | Memory Page Faults | pgfault, swap | MiB/s |
| k8s.cgroup.mem_usage | Used Memory | ram, swap | MiB |
| k8s.cgroup.mem_usage_limit | Used RAM within the limits | available, used | MiB |
| k8s.cgroup.mem_utilization | Memory Utilization | utilization | percentage |
| k8s.cgroup.mem_failcnt | Memory Limit Failures | failures | count |
| k8s.cgroup.io | I/O Bandwidth (all disks) | read, write | KiB/s |
| k8s.cgroup.serviced_ops | Serviced I/O Operations (all disks) | read, write | operations/s |
| k8s.cgroup.throttle_io | Throttle I/O Bandwidth (all disks) | read, write | KiB/s |
| k8s.cgroup.throttle_serviced_ops | Throttle Serviced I/O Operations (all disks) | read, write | operations/s |
| k8s.cgroup.queued_ops | Queued I/O Operations (all disks) | read, write | operations |
| k8s.cgroup.merged_ops | Merged I/O Operations (all disks) | read, write | operations/s |
| k8s.cgroup.cpu_some_pressure | CPU some pressure | some10, some60, some300 | percentage |
| k8s.cgroup.cpu_some_pressure_stall_time | CPU some pressure stall time | time | ms |
| k8s.cgroup.cpu_full_pressure | CPU full pressure | some10, some60, some300 | percentage |
| k8s.cgroup.cpu_full_pressure_stall_time | CPU full pressure stall time | time | ms |
| k8s.cgroup.memory_some_pressure | Memory some pressure | some10, some60, some300 | percentage |
| k8s.cgroup.memory_some_pressure_stall_time | Memory some pressure stall time | time | ms |
| k8s.cgroup.memory_full_pressure | Memory full pressure | some10, some60, some300 | percentage |
| k8s.cgroup.memory_full_pressure_stall_time | Memory full pressure stall time | time | ms |
| k8s.cgroup.io_some_pressure | I/O some pressure | some10, some60, some300 | percentage |
| k8s.cgroup.io_some_pressure_stall_time | I/O some pressure stall time | time | ms |
| k8s.cgroup.io_full_pressure | I/O some pressure | some10, some60, some300 | percentage |
| k8s.cgroup.io_full_pressure_stall_time | I/O some pressure stall time | time | ms |
| k8s.cgroup.pids_current | Number of processes | pids | pids |
Per k8s cgroup network device
These metrics refer to the Pod container network interface.
Labels:
| Label | Description |
|---|---|
| device | The name of the host network interface linked to the container's network interface. |
| container_device | Container network interface name. |
| interface_type | Network interface type. Always "virtual" for the containers. |
| k8s_node_name | Node name. The value of pod.spec.nodeName. |
| k8s_namespace | Namespace name. The value of pod.metadata.namespace. |
| k8s_controller_kind | Controller kind (ReplicaSet, DaemonSet, StatefulSet, Job, etc.). The value of pod.OwnerReferences.Controller.Kind. |
| k8s_controller_name | Controller name.The value of pod.OwnerReferences.Controller.Name. |
| k8s_pod_name | Pod name. The value of pod.metadata.name. |
| k8s_container_name | Container name. The value of pod.spec.containers.name. |
| k8s_kind | Instance kind: "pod" or "container". |
| k8s_qos_class | QoS class (guaranteed, burstable, besteffort). |
| k8s_cluster_id | Cluster ID. The value of kube-system namespace namespace.metadata.uid. |
Metrics:
| Metric | Description | Dimensions | Unit |
|---|---|---|---|
| k8s.cgroup.net_net | Bandwidth | received, sent | kilobits/s |
| k8s.cgroup.net_packets | Packets | received, sent, multicast | pps |
| k8s.cgroup.net_errors | Interface Errors | inbound, outbound | errors/s |
| k8s.cgroup.net_drops | Interface Drops | inbound, outbound | errors/s |
| k8s.cgroup.net_fifo | Interface FIFO Buffer Errors | receive, transmit | errors/s |
| k8s.cgroup.net_compressed | Interface FIFO Buffer Errors | receive, sent | pps |
| k8s.cgroup.net_events | Network Interface Events | frames, collisions, carrier | events/s |
| k8s.cgroup.net_operstate | Interface Operational State | up, down, notpresent, lowerlayerdown, testing, dormant, unknown | state |
| k8s.cgroup.net_carrier | Interface Physical Link State | up, down | state |
| k8s.cgroup.net_mtu | Interface MTU | mtu | octets |
Per cgroups plugin IPC
cgroups.plugin netipc lookup-server and discovery signal health.
This scope has no labels.
Metrics:
| Metric | Description | Dimensions | Unit |
|---|---|---|---|
| netdata.collector.ipc.cgroups_lookup.server.requests | CGROUPS_LOOKUP server request outcomes | requests_responded, requests_error, lookup_miss_signals_sent, lookup_miss_signals_coalesced | requests/s |
| netdata.collector.ipc.cgroups_lookup.server.request_duration_ms | CGROUPS_LOOKUP server request duration buckets | le_1ms, le_5ms, le_10ms, le_50ms, le_100ms, le_500ms, le_1000ms, gt_1000ms | requests/s |
| netdata.collector.cgroups.discovery.scans | cgroups discovery scans by trigger source | discovery_scans_natural, discovery_scans_opportunistic | scans/s |
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