netdata/health/health.d/kubelet.conf

# you can disable an alarm notification by setting the 'to' line to: silent

# -----------------------------------------------------------------------------

# True (1) if the node is experiencing a configuration-related error, false (0) otherwise.

 template: kubelet_node_config_error
       on: k8s_kubelet.kubelet_node_config_error
    class: Errors
     type: Kubernetes
component: Kubelet
     calc: $experiencing_error
    units: bool
    every: 10s
     warn: $this == 1
    delay: down 1m multiplier 1.5 max 2h
  summary: Kubelet node config error
     info: The node is experiencing a configuration-related error (0: false, 1: true)
       to: sysadmin

# Failed Token() requests to the alternate token source

 template: kubelet_token_requests
       on: k8s_kubelet.kubelet_token_requests
    class: Errors
     type: Kubernetes
component: Kubelet
   lookup: sum -10s of failed
    units: requests
    every: 10s
     warn: $this > 0
    delay: down 1m multiplier 1.5 max 2h
  summary: Kubelet failed token requests
     info: Number of failed Token() requests to the alternate token source
       to: sysadmin

# Docker and runtime operation errors

 template: kubelet_operations_error
       on: k8s_kubelet.kubelet_operations_errors
    class: Errors
     type: Kubernetes
component: Kubelet
   lookup: sum -1m
    units: errors
    every: 10s
     warn: $this > (($status >= $WARNING)  ? (0) : (20))
    delay: up 30s down 1m multiplier 1.5 max 2h
  summary: Kubelet runtime errors
     info: Number of Docker or runtime operation errors
       to: sysadmin

# -----------------------------------------------------------------------------

# Pod Lifecycle Event Generator Relisting Latency

# 1. calculate the pleg relisting latency for 1m (quantile 0.5, quantile 0.9, quantile 0.99)
# 2. do the same for the last 10s
# 3. raise an alarm if the later is:
# - 2x the first for quantile 0.5
# - 4x the first for quantile 0.9
# - 8x the first for quantile 0.99
#
# we assume the minimum latency is 1000 microseconds

# quantile 0.5

 template: kubelet_1m_pleg_relist_latency_quantile_05
       on: k8s_kubelet.kubelet_pleg_relist_latency_microseconds
    class: Latency
     type: Kubernetes
component: Kubelet
   lookup: average -1m unaligned of 0.5
    units: microseconds
    every: 10s
     info: average Pod Lifecycle Event Generator relisting latency over the last minute (quantile 0.5)

 template: kubelet_10s_pleg_relist_latency_quantile_05
       on: k8s_kubelet.kubelet_pleg_relist_latency_microseconds
    class: Latency
     type: Kubernetes
component: Kubelet
   lookup: average -10s unaligned of 0.5
     calc: $this * 100 / (($kubelet_1m_pleg_relist_latency_quantile_05 < 1000)?(1000):($kubelet_1m_pleg_relist_latency_quantile_05))
    every: 10s
    units: %
     warn: $this > (($status >= $WARNING)?(100):(200))
     crit: $this > (($status >= $WARNING)?(200):(400))
    delay: down 1m multiplier 1.5 max 2h
  summary: Kubelet relisting latency (quantile 0.5)
     info: Ratio of average Pod Lifecycle Event Generator relisting latency over the last 10 seconds, \
           compared to the last minute (quantile 0.5)
       to: sysadmin

# quantile 0.9

 template: kubelet_1m_pleg_relist_latency_quantile_09
       on: k8s_kubelet.kubelet_pleg_relist_latency_microseconds
    class: Latency
     type: Kubernetes
component: Kubelet
   lookup: average -1m unaligned of 0.9
    units: microseconds
    every: 10s
     info: average Pod Lifecycle Event Generator relisting latency over the last minute (quantile 0.9)

 template: kubelet_10s_pleg_relist_latency_quantile_09
       on: k8s_kubelet.kubelet_pleg_relist_latency_microseconds
    class: Latency
     type: Kubernetes
component: Kubelet
   lookup: average -10s unaligned of 0.9
     calc: $this * 100 / (($kubelet_1m_pleg_relist_latency_quantile_09 < 1000)?(1000):($kubelet_1m_pleg_relist_latency_quantile_09))
    every: 10s
    units: %
     warn: $this > (($status >= $WARNING)?(200):(400))
     crit: $this > (($status >= $WARNING)?(400):(800))
    delay: down 1m multiplier 1.5 max 2h
  summary: Kubelet relisting latency (quantile 0.9)
     info: Ratio of average Pod Lifecycle Event Generator relisting latency over the last 10 seconds, \
           compared to the last minute (quantile 0.9)
       to: sysadmin

# quantile 0.99

 template: kubelet_1m_pleg_relist_latency_quantile_099
       on: k8s_kubelet.kubelet_pleg_relist_latency_microseconds
    class: Latency
     type: Kubernetes
component: Kubelet
   lookup: average -1m unaligned of 0.99
    units: microseconds
    every: 10s
     info: average Pod Lifecycle Event Generator relisting latency over the last minute (quantile 0.99)

 template: kubelet_10s_pleg_relist_latency_quantile_099
       on: k8s_kubelet.kubelet_pleg_relist_latency_microseconds
    class: Latency
     type: Kubernetes
component: Kubelet
   lookup: average -10s unaligned of 0.99
     calc: $this * 100 / (($kubelet_1m_pleg_relist_latency_quantile_099 < 1000)?(1000):($kubelet_1m_pleg_relist_latency_quantile_099))
    every: 10s
    units: %
     warn: $this > (($status >= $WARNING)?(400):(800))
     crit: $this > (($status >= $WARNING)?(800):(1200))
    delay: down 1m multiplier 1.5 max 2h
  summary: Kubelet relisting latency (quantile 0.99)
     info: Ratio of average Pod Lifecycle Event Generator relisting latency over the last 10 seconds, \
           compared to the last minute (quantile 0.99)
       to: sysadmin