IT Cloud. Eugeny Shtoltc
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= "amd64", beta_kubernetes_io_os = "linux", instance = "node01", job = "kubernetes-cadvisor", kubernetes_io_arch = "amd64", kubernetes_io_hostname = "node01", kubernetes_io_hostname = "node01", kubernetes_io_hostname = "node01"
If the network is MEMORY, then you can select machine_memory_bytes – the size of the RAM on the machine (server or virtual):
machine_memory_bytes {beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", instance = "controlplane", job = "kubernetes-cadvisor", kubernetes_io_arch = "amd64", kubernetes_io_hostname "}
machine_memory_bytes {beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", instance = "node01", job = "kubernetes-cadvisor", kubernetes_io_arch = "amd64", kubernetes_io_hostname = "node901", kubernetes_io_hostname = "node901"
But in bytes it is not clear, so we will use PromQL to translate to Gb: machine_memory_bytes / 1000/1000/1000
{beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", instance = "controlplane", job = "kubernetes-cadvisor", kubernetes_io_arch = "amd64", kubernetes_io_hostname = "controlplane", kubernetes_io25}
{beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", instance = "node01", job = "kubernetes-cadvisor", kubernetes_io_arch = "amd64", kubernetes_io_hostname = "node01", kubernetes_io48}
Let's enter for memory_bytes to search for container_memory_usage_bytes – used memory. The list contains all containers and their current memory consumption, I will give only three:
container_memory_usage_bytes {beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", container = "POD", container_name = "POD", id = "/ kubepods.slice / kubepods-besteffort.slice / kubepod-pods-beseff633. b6549e892baa8687e4e98a106024b5c31a4af077d7c5544af03a3c72ec8997e0.scope ", image =" k8s.gcr.io/pause:3.1 ", instance =" controlplane ", job =" kubernetes-cadvisor ", kubernetes-cadvisorname," kubernetes-cadvisor "," kubernetes-cadvisor "," kubernetes-cadvisor "," kubernetes-cadvisor " , name = "k8s_POD_etcd-controlplane_kube-system_0e619e5dc53ed9efcef63f5fe1d7ee71_0", namespace = "kube-system", pod = "etcd-controlplane", pod_name = "etcd-controlplane"} 45056
container_memory_usage_bytes {beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", container = "POD", container_name = "POD", id = "/ kubepods.slice / kubepods-besteffort.slice / kubepods-pods-besteff2. 76711789af076c8f2331d8212dad4c044d263c5cc3fa333347921bd6de7950a4.scope ", image =" k8s.gcr.io/pause:3.1 ", instance =" controlplane ", job =" kubernetes-caduvisor ", kubernetes_dio_host , name = "k8s_POD_kube-proxy-nhzhn_kube-system_5a815a40-f2de-11ea-88d2-0242ac110032_0", namespace = "kube-system", pod = "kube-proxy-nhzhn", pod_name = "kube-proxy-450 nhz
container_memory_usage_bytes {beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", container = "POD", container_name = "POD", id = "/ kubepods.slice / kubepods-besteffort.slice / kubepa-poda-besteffort. 24ef0e898e1bb7dec9854b67291171aa9c5715d7683f53bdfc2cef49a19744fe.scope ", image =" k8s.gcr.io/pause:3.1 ", instance =" node01 ", job =" kubernetes-caduvisor amuber, kubernetes_dio_arch ", kubernetes_dio_arch , name = "k8s_POD_kube-proxy-6v49x_kube-system_6473aeea-f2de-11ea-88d2-0242ac110032_0", namespace = "kube-system", pod = "kube-proxy-6v49x", pod_name = "kube-proxy-835549x
Let's set the label that is contained in the metrics to filter out one: container_memory_usage_bytes {container_name = "prometheus"}
container_MEMORY_usage_bytes {beta_Kubernetes_io_arch = "amd64", beta_Kubernetes_io_os = "linux", container = "prometheus", container_name = "prometheus", id = "/ kubePODs.slice / kubePODs-burstableODslice-burdeaf2.slice. b314fb5c4ce8894f872f05bdd524b4b7d6ce5415aeb3fb91d6048441c47584a6.scope ", image =" sha256: b82ef1f3aa072922c657dd2b2c6b59ec0ac88e69c447998291066e1f67e741d8 ", instance =" node01 ", JOB =" Kubernetes-cadvisor ", Kubernetes_io_arch =" amd64 ", Kubernetes_io_hostname =" node01 ", Kubernetes_io_os =" linux ", name =" k8s_prometheus_prometheus- 5b77b7d695-knf44_istio-system_eaf4e833-f2de-11ea-88d2-0242ac110032_0 ", namespace =" istio-system ", POD =" prometheus-5b77b7d695-knf44 ", POD_name =" prometheus-5b77b7d44
283443200
Let's bring in Mb: container_memory_usage_bytes {container_name = "prometheus"} / 1000/1000
{Beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", container = "prometheus", container_name = "prometheus", id = "/ kubepods.slice / kubepods-burstable.slice / kubepods-burstable-podeaf4e833_f2de_11ea_88d2_0242ac110032.slice / docker-b314fb5c4ce8894f872f05bdd524b4b7d6ce5415aeb3fb91d6048441c47584a6 .scope ", image =" sha256: b82ef1f3aa072922c657dd2b2c6b59ec0ac88e69c447998291066e1f67e741d8 ", instance =" node01 ", job =" kubernetes-cadvisor ", kubernetes_io_arch =" amd64 ", kubernetes_io_hostname =" node01 ", kubernetes_io_os =" linux ", name =" k8s_prometheus_prometheus-5b77b7d695 -knf44_istio-system_eaf4e833-f2de-11ea-88d2-0242ac110032_0 ", namespace =" istio-system ", pod =" prometheus-5b77b7d695-knf44 ", pod_name =" prometheus-5b77b7d695-knf44 "}
286.18752
Filter by container_memory_usage_bytes {container_name = "prometheus", instance = "node01"}
beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", container = "prometheus", container_name = "prometheus", id = "/ kubepods.slice / kubepods-burstable.slice / kubepods-burstable-podeaf4e833_f2de_11ea_88d2_0242ac110032.slice / docker-b314fb5c4ce8894f872f05bdd524b4b7d6ce5415aeb3fb91d6048441c47584a6. scope ", image =" sha256: b82ef1f3aa072922c657dd2b2c6b59ec0ac88e69c447998291066e1f67e741d8 ", instance =" node01 ", job =" kubernetes-cadvisor ", kubernetes_io_arch =" amd64 ", kubernetes_io_hostname =" node01 ", kubernetes_io_os =" linux ", name =" k8s_prometheus_prometheus-5b77b7d695- knf44_istio-system_eaf4e833-f2de-11ea-88d2-0242ac110032_0 ", namespace =" istio-system ", pod =" prometheus-5b77b7d695-knf44 ", pod_name =" prometheus-5b77b7d695-knf44 "}
289.890304
And on the second one it is not: container_memory_usage_bytes {container_name = "prometheus", instance = "node02"}
no data
There are also aggregate functions sum (container_memory_usage_bytes) / 1000/1000/1000
{} 22.812798976
max (container_memory_usage_bytes) / 1000/1000/1000
{} 3.6422983679999996
min (container_memory_usage_bytes) / 1000/1000/1000
{} 0
You can also group by labels instance: max (container_memory_usage_bytes) by (instance) / 1000/1000/1000
{instance = "controlplane"} 1.641836544
{instance = "node01"} 3.6622745599999997
You can perform actions with the same type of labels and filter out: container_memory_mapped_file / container_memory_usage_bytes * 100> 80
{Beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", container = "POD", container_name = "POD", id = "/ kubepods.slice / kubepods-burstable.slice / kubepods-burstable-pode45f10af1ae684722cbd74cb11807900.slice / docker-5cb2f2083fbc467b8b394b27b69686d309f951450bcb910d509572aea9922806 .scope ", image =" k8s.gcr.io/pause:3.1 ", instance =" controlplane ", job =" kubernetes-cadvisor ", kubernetes_io_arch =" amd64 ", kubernetes_io_hostname =" controlplane ", kubernetes_io_os =" linux ", name = "k8s_POD_kube-controller-manager-controlplane_kube-system_e45f10af1ae684722cbd74cb11807900_0", namespace = "kube-system", pod = "kube-controller-manager-controlplane", pod_name = "kube-controller-manager-controlplane"}
80.52631578947368
You can look at the file system metrics using container_fs_limit_bytes, which produces a large list – I will give a few of it:
container_fs_limit_bytes {beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os = "linux", container = "POD", container_name = "POD", device = "/ dev / vda1", id = "/ kubepods.slice / kubepods-besteffort.subods / kubepods-besteffort.slice -besteffort-pod0e619e5dc53ed9efcef63f5fe1d7ee71.slice / docker-b6549e892baa8687e4e98a106024b5c31a4af077d7c5544af03a3c72ec8997e0.scope ", image =" k8s.gcr.io/pause:3.1 ", instance =" controlplane ", job =" kubernetes-cadvisor ", kubernetes_io_arch =" amd64 ", kubernetes_io_hostname = "controlplane", kubernetes_io_os = "linux", name = "k8s_POD_etcd-controlplane_kube-system_0e619e5dc53ed9efcef63f5fe1d7ee71_0", namespace = "kube-system", pod = "etcd-controlplane", pod_name "} etcd-controlplane =" etc
253741748224
container_fs_limit_bytes {beta_kubernetes_io_arch = "amd64", beta_kubernetes_io_os