Monitoreo y uso de Prometheus (siga los pasos del documento para tener éxito).
Los documentos utilizan por separado la ventana acoplable de implementación del clúster k8s para ejecutar la supervisión de prometheus. (Si tiene tiempo más tarde,
crearé un documento para el módulo de monitoreo ) Enlace del artículo de detalles de monitoreo de K8
https://blog.csdn.net/zeorg/article/details/112164465
Nota especial: este entorno debe implementarse antes de k8s.
1. Prometheus es la mejor opción para monitorear k8s. Aquí hay un documento sobre la implementación de prometheus en k8s para su referencia.
# 私自 Reproducido, comuníquese con el blogger, de lo contrario, se deben investigar los derechos de autor. Hay WeChat en el
entorno del sistema:
| IP | Nombre de nodo (no nombre de host) |
|---|---|
| 192.168.182.150 | k8s-maestro |
| 192.168.182.151 | k8s-nodo2 |
| 192.168.182.152 | k8s-nodo2 |
| 192.168.182.153 | almacén portuario |
1. Primero extraiga las imágenes de prometheus en el almacén de la ventana acoplable (use k8s directamente para extraer debido a problemas de red, se puede decir que básicamente falla).
Ejecución del almacén de Docker
docker pull prom/prometheus:v2.2.1
docker tag prom/prometheus:v2.2.1 192.168.182.153:5000/prom/prometheus:v2.2.1
###为prometheus:v2.2.1 images 打一个标签
docker push 192.168.182.153:5000/prom/prometheus:v2.2.1
##上传打包后的prometheus:v2.2.1镜像
2. Utilice k8s para crear una configuración de contenedor de prometheus.
ejecución de k8s-master
创建文件prometheus-config.yml（如果是实验环境目录无所谓）
apiVersion: v1
kind: ConfigMap
metadata:
name: prometheus-config
data:
prometheus.yml: |
global:
scrape_interval: 15s
evaluation_interval: 15s
scrape_configs:
- job_name: 'prometheus'
static_configs:
- targets: ['localhost:9090']
创建文件prometheus-deployment.yml（如果是实验环境目录无所谓）
apiVersion: v1
kind: "Service"
metadata:
name: prometheus
labels:
name: prometheus
spec:
ports:
- name: prometheus
protocol: TCP
port: 9090
targetPort: 9090
selector:
app: prometheus
type: NodePort
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
labels:
name: prometheus
name: prometheus
spec:
replicas: 1
template:
metadata:
labels:
app: prometheus
spec:
containers:
- name: prometheus
image: prom/prometheus:v2.2.1
command:
- "/bin/prometheus"
args:
- "--config.file=/etc/prometheus/prometheus.yml"
ports:
- containerPort: 9090
protocol: TCP
volumeMounts:
- mountPath: "/etc/prometheus"
name: prometheus-config
volumes:
- name: prometheus-config
configMap:
name: prometheus-config
3. Utilice k8s para emitir tareas.
ejecución de k8s-master
kubectl create -f prometheus-config.yml
kubeckubectl create -f prometheus-deployment.yml
4. Vea el progreso de la tarea.
ejecución de k8s-master
[root@master prometheus]# kubectl get pods ##如果下方创建失败可以根据NAME名称查看日志
NAME READY STATUS RESTARTS AGE
nginx-3121059884-lx6qc 1/1 Running 0 1h
nginx-3121059884-n6bdl 1/1 Running 0 1h
nginx-3121059884-n9pxz 1/1 Running 1 4h
prometheus-3596598276-5wrkl 1/1 Running 0 1h
5. Verifique el registro de fallas (estoy tras el éxito, por lo que el estado es En ejecución) Puede ver que mi informe de errores tiene múltiples fallas de extracción de espejo.
ejecución de k8s-master
kubectl describe pod prometheus-3596598276-5wrkl
Name: prometheus-3596598276-5wrkl
Namespace: default
Node: node-1/192.168.182.151
Start Time: Fri, 01 Jan 2021 21:39:02 +0800
Labels: app=prometheus
pod-template-hash=3596598276
Status: Running
IP: 10.10.17.5
Controllers: ReplicaSet/prometheus-3596598276
Containers:
prometheus:
Container ID: docker://d2887dbb516b7415f0ddf1ee1c8fbf0b389db935e361c6108c44a9b52bb6ef29
Image: prom/prometheus:v2.2.1
Image ID: docker-pullable://192.168.182.153:5000/prom/prometheus@sha256:b0912ab008c270be88f6e81d3df6dfd24b7c1f9b4aacbffa70abe2a382152223
Port: 9090/TCP
Command:
/bin/prometheus
Args:
--config.file=/etc/prometheus/prometheus.yml
State: Running
Started: Fri, 01 Jan 2021 22:24:25 +0800
Ready: True
Restart Count: 0
Volume Mounts:
/etc/prometheus from prometheus-config (rw)
Environment Variables: <none>
Conditions:
Type Status
Initialized True
Ready True
PodScheduled True
Volumes:
prometheus-config:
Type: ConfigMap (a volume populated by a ConfigMap)
Name: prometheus-config
QoS Class: BestEffort
Tolerations: <none>
Events:
FirstSeen LastSeen Count From SubObjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
1h 58m 9 {
default-scheduler } Warning FailedScheduling no nodes available to schedule pods
57m 57m 6 {
default-scheduler } Warning FailedScheduling no nodes available to schedule pods
56m 56m 1 {
default-scheduler } Normal Scheduled Successfully assigned prometheus-3596598276-5wrkl to node-1
56m 44m 14 {
kubelet node-1} Warning FailedMount MountVolume.SetUp failed for volume "kubernetes.io/configmap/0a83b05e-4c34-11eb-ae3b-000c29fd225f-prometheus-config" (spec.Name: "prometheus-config") pod "0a83b05e-4c34-11eb-ae3b-000c29fd225f" (UID: "0a83b05e-4c34-11eb-ae3b-000c29fd225f") with: configmaps "prometheus-config" not found
54m 43m 6 {
kubelet node-1} Warning FailedMount Unable to mount volumes for pod "prometheus-3596598276-5wrkl_default(0a83b05e-4c34-11eb-ae3b-000c29fd225f)": timeout expired waiting for volumes to attach/mount for pod "default"/"prometheus-3596598276-5wrkl". list of unattached/unmounted volumes=[prometheus-config]
54m 43m 6 {
kubelet node-1} Warning FailedSync Error syncing pod, skipping: timeout expired waiting for volumes to attach/mount for pod "default"/"prometheus-3596598276-5wrkl". list of unattached/unmounted volumes=[prometheus-config]
32m 32m 1 {
kubelet node-1} spec.containers{
prometheus} Normal BackOff Back-off pulling image "prom/prometheus:v2.2.1"
32m 32m 1 {
kubelet node-1} Warning FailedSync Error syncing pod, skipping: failed to "StartContainer" for "prometheus" with ImagePullBackOff: "Back-off pulling image \"prom/prometheus:v2.2.1\""
32m 14m 2 {
kubelet node-1} spec.containers{
prometheus} Warning Failed Failed to pull image "prom/prometheus:v2.2.1": net/http: request canceled
32m 14m 2 {
kubelet node-1} Warning FailedSync Error syncing pod, skipping: failed to "StartContainer" for "prometheus" with ErrImagePull: "net/http: request canceled"
42m 14m 3 {
kubelet node-1} spec.containers{
prometheus} Normal Pulling pulling image "prom/prometheus:v2.2.1"
11m 11m 1 {
kubelet node-1} spec.containers{
prometheus} Normal Pulled Successfully pulled image "prom/prometheus:v2.2.1"
42m 11m 2 {
kubelet node-1} Warning MissingClusterDNS kubelet does not have ClusterDNS IP configured and cannot create Pod using "ClusterFirst" policy. Falling back to DNSDefault policy.
11m 11m 1 {
kubelet node-1} spec.containers{
prometheus} Normal Created Created container with docker id d2887dbb516b; Security:[seccomp=unconfined]
11m 11m 1 {
kubelet node-1} spec.containers{
prometheus} Normal Started Started container with docker id d2887dbb516b
6. Verifique los puertos asignados al azar del contenedor.
ejecución de k8s-master
[root@master prometheus]# kubectl get all
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
deploy/nginx 3 3 3 3 4h
deploy/prometheus 1 1 1 1 1h
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
svc/kubernetes 10.10.0.1 <none> 443/TCP 4h
svc/nginx 10.10.214.157 <nodes> 80:31882/TCP 4h
svc/prometheus 10.10.165.138 <nodes> 9090:32332/TCP 1h
6. Abra en un navegador web.
