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pod.go
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pod.go
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package kube_inventory
import (
"context"
v1 "github.com/ericchiang/k8s/apis/core/v1"
"github.com/influxdata/telegraf"
)
func collectPods(ctx context.Context, acc telegraf.Accumulator, ki *KubernetesInventory) {
list, err := ki.client.getPods(ctx)
if err != nil {
acc.AddError(err)
return
}
for _, p := range list.Items {
if err = ki.gatherPod(*p, acc); err != nil {
acc.AddError(err)
return
}
}
}
func (ki *KubernetesInventory) gatherPod(p v1.Pod, acc telegraf.Accumulator) error {
if p.Metadata.CreationTimestamp.GetSeconds() == 0 && p.Metadata.CreationTimestamp.GetNanos() == 0 {
return nil
}
for i, cs := range p.Status.ContainerStatuses {
c := p.Spec.Containers[i]
gatherPodContainer(*p.Spec.NodeName, ki, p, *cs, *c, acc)
}
return nil
}
func gatherPodContainer(nodeName string, ki *KubernetesInventory, p v1.Pod, cs v1.ContainerStatus, c v1.Container, acc telegraf.Accumulator) {
stateCode := 3
stateReason := ""
state := "unknown"
switch {
case cs.State.Running != nil:
stateCode = 0
state = "running"
case cs.State.Terminated != nil:
stateCode = 1
state = "terminated"
stateReason = cs.State.Terminated.GetReason()
case cs.State.Waiting != nil:
stateCode = 2
state = "waiting"
stateReason = cs.State.Waiting.GetReason()
}
readiness := "unready"
if cs.GetReady() {
readiness = "ready"
}
fields := map[string]interface{}{
"restarts_total": cs.GetRestartCount(),
"state_code": stateCode,
"terminated_reason": cs.State.Terminated.GetReason(),
}
if stateReason != "" {
fields["state_reason"] = stateReason
}
tags := map[string]string{
"container_name": *c.Name,
"namespace": *p.Metadata.Namespace,
"node_name": *p.Spec.NodeName,
"pod_name": *p.Metadata.Name,
"state": state,
"readiness": readiness,
}
for key, val := range p.GetSpec().GetNodeSelector() {
if ki.selectorFilter.Match(key) {
tags["node_selector_"+key] = val
}
}
req := c.Resources.Requests
lim := c.Resources.Limits
for resourceName, val := range req {
switch resourceName {
case "cpu":
fields["resource_requests_millicpu_units"] = convertQuantity(val.GetString_(), 1000)
case "memory":
fields["resource_requests_memory_bytes"] = convertQuantity(val.GetString_(), 1)
}
}
for resourceName, val := range lim {
switch resourceName {
case "cpu":
fields["resource_limits_millicpu_units"] = convertQuantity(val.GetString_(), 1000)
case "memory":
fields["resource_limits_memory_bytes"] = convertQuantity(val.GetString_(), 1)
}
}
acc.AddFields(podContainerMeasurement, fields, tags)
}