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When are you planning to write another blog for #4, Prometheus performance considerations?
Please let me know when are you planning to publish your blog #4. Prometheus performance considerations, high availability, external storage, dimensionality limits?
Blog post #1, Traefik service not accessible by default from external
Hi,
I'm working through your sysdig blog posts and was wondering if the Traefik deployment from this repository is supposed to create an actual ingress?
Just by following the instructions, the curl command is unable to connect to the service since it is not exposed to the outside world.
Sysdig Tutorial: node-exporter-daemonset not working out of the box
Hey Mateo, I've just been following your (excellent) Kubernetes Monitoring with Prometheus tutorial and encountered an issue towards the end, where you deploy the node-exporter DaemonSet:
Here you mention to create a new namespace and pull a DaemonSet from another repo:
kubectl create ns monitoring
kubectl create -f https://raw.githubusercontent.com/bakins/minikube-prometheus-demo/master/node-exporter-daemonset.yml
Unfortunately the repo is archived and seems to have some issues. In this case, the node-exporter
pod created by the DaemonSet is not discoverable by Prometheus because of the seperate monitoring
namespace (all previous resources have been launched in default
).
For it to work, I had to create a headless Service for the pod:
kind: Service
apiVersion: v1
metadata:
name: node-exporter
namespace: monitoring
spec:
selector:
name: node-exporter
ports:
- port: 9100
targetPort: 9100
clusterIP: None
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: node-exporter
namespace: monitoring
labels:
name: node-exporter
spec:
selector:
matchLabels:
name: node-exporter
template:
metadata:
labels:
name: node-exporter
annotations:
prometheus.io/scrape: "true"
prometheus.io/port: "9100"
spec:
hostPID: true
hostIPC: true
hostNetwork: true
containers:
- ports:
- containerPort: 9100
protocol: TCP
resources:
requests:
cpu: 0.15
securityContext:
privileged: true
image: prom/node-exporter:v0.15.2
args:
- --path.procfs
- /host/proc
- --path.sysfs
- /host/sys
- --collector.filesystem.ignored-mount-points
- '"^/(sys|proc|dev|host|etc)($|/)"'
name: node-exporter
volumeMounts:
- name: dev
mountPath: /host/dev
- name: proc
mountPath: /host/proc
- name: sys
mountPath: /host/sys
- name: rootfs
mountPath: /rootfs
volumes:
- name: proc
hostPath:
path: /proc
- name: dev
hostPath:
path: /dev
- name: sys
hostPath:
path: /sys
- name: rootfs
hostPath:
path: /
which makes it discoverable via DNS in the prometheus.yml
:
# ...
- job_name: 'node-exporter'
static_configs:
- targets: ['node-exporter.monitoring.svc.cluster.local:9100']
You might want to consider including it in the tutorial :)
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