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Add prometheus scraping also for external-dns and coredns pods #876

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Apr 25, 2022
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Add prometheus scraping also for external-dns and coredns pods #876

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18 changes: 14 additions & 4 deletions Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -547,11 +547,20 @@ define debug
dlv $1
endef

define annotate-for-scraping
kubectl annotate pods -n k8gb -l $1 --overwrite prometheus.io/scrape="true" --overwrite prometheus.io/port="$2" --context=k3d-$3
endef

define stop-scraping
kubectl annotate pods -n k8gb -l $1 prometheus.io/scrape- prometheus.io/port- --context=k3d-$2
endef

define deploy-prometheus
echo -e "\n$(YELLOW)Local cluster $(CYAN)$1$(NC)" ;\
echo -e "\n$(YELLOW)Set annotations on pods that will be scraped by prometheus$(NC)" ;\
kubectl annotate pods -l name=k8gb -n k8gb --overwrite prometheus.io/scrape="true" --context=k3d-$1 ;\
kubectl annotate pods -l name=k8gb -n k8gb --overwrite prometheus.io/port="8080" --context=k3d-$1 ;\
$(call annotate-for-scraping,"name=k8gb",8080,$1) ;\
$(call annotate-for-scraping,"app=external-dns",7979,$1) ;\
$(call annotate-for-scraping,"app.kubernetes.io/name=coredns",9153,$1) ;\
echo -e "\n$(YELLOW)install prometheus $(NC)" ;\
helm repo add prometheus-community https://prometheus-community.github.io/helm-charts ;\
helm repo update ;\
Expand All @@ -565,6 +574,7 @@ define uninstall-prometheus
echo -e "\n$(YELLOW)Local cluster $(CYAN)$1$(NC)" ;\
echo -e "\n$(YELLOW)uninstall prometheus $(NC)" ;\
helm uninstall prometheus -n k8gb --kube-context=k3d-$1 ;\
kubectl annotate pods -l name=k8gb -n k8gb prometheus.io/scrape- --context=k3d-$1 ;\
kubectl annotate pods -l name=k8gb -n k8gb prometheus.io/port- --context=k3d-$1
$(call stop-scraping,"name=k8gb",$1) ;\
$(call stop-scraping,"app=external-dns",$1) ;\
$(call stop-scraping,"app.kubernetes.io/name=coredns",$1)
endef
2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -77,7 +77,7 @@ This setup is adapted for local scenarios and works without external DNS provide

Consult with [local playground](/docs/local.md) documentation to learn all the details of experimenting with local setup.

Optionally, you can run `make deploy-prometheus` and check the metrics on the test clusters (http://localhost:8080, http://localhost:8081).
Optionally, you can run `make deploy-prometheus` and check the metrics on the test clusters (http://localhost:9080, http://localhost:9081).

## Motivation and Architecture

Expand Down