Ndewo, unu niile. Na Mee OTUS malite
Gburugburu
Anyị ga-achọ ihe ndị a:
- Kubernetes
- Onye ọrụ Prometheus
Nhazi igbe ojii nke mbupụ
Na-ahazi Blackbox site na ConfigMap
maka ntọala http
modul nlekota ọrụ weebụ.
apiVersion: v1
kind: ConfigMap
metadata:
name: prometheus-blackbox-exporter
labels:
app: prometheus-blackbox-exporter
data:
blackbox.yaml: |
modules:
http_2xx:
http:
no_follow_redirects: false
preferred_ip_protocol: ip4
valid_http_versions:
- HTTP/1.1
- HTTP/2
valid_status_codes: []
prober: http
timeout: 5s
Daalụ http_2xx
eji elele na ọrụ webụ weghachi koodu ọnọdụ HTTP 2xx. A kọwapụtara nhazi onye mbupụ blackbox n'ụzọ zuru ezu n'ime
Na-ebuga onye na-ebupụ igbe ojii na ụyọkọ Kubernetes
Kọwaa Deployment
и Service
maka mbugharị na Kubernetes.
---
kind: Service
apiVersion: v1
metadata:
name: prometheus-blackbox-exporter
labels:
app: prometheus-blackbox-exporter
spec:
type: ClusterIP
ports:
- name: http
port: 9115
protocol: TCP
selector:
app: prometheus-blackbox-exporter
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: prometheus-blackbox-exporter
labels:
app: prometheus-blackbox-exporter
spec:
replicas: 1
selector:
matchLabels:
app: prometheus-blackbox-exporter
template:
metadata:
labels:
app: prometheus-blackbox-exporter
spec:
restartPolicy: Always
containers:
- name: blackbox-exporter
image: "prom/blackbox-exporter:v0.15.1"
imagePullPolicy: IfNotPresent
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
args:
- "--config.file=/config/blackbox.yaml"
resources:
{}
ports:
- containerPort: 9115
name: http
livenessProbe:
httpGet:
path: /health
port: http
readinessProbe:
httpGet:
path: /health
port: http
volumeMounts:
- mountPath: /config
name: config
- name: configmap-reload
image: "jimmidyson/configmap-reload:v0.2.2"
imagePullPolicy: "IfNotPresent"
securityContext:
runAsNonRoot: true
runAsUser: 65534
args:
- --volume-dir=/etc/config
- --webhook-url=http://localhost:9115/-/reload
resources:
{}
volumeMounts:
- mountPath: /etc/config
name: config
readOnly: true
volumes:
- name: config
configMap:
name: prometheus-blackbox-exporter
Enwere ike ibuga onye na-ebupụ igbe ojii site na iji iwu a. Oghere aha monitoring
na-ezo aka Prometheus Operator.
kubectl --namespace=monitoring apply -f blackbox-exporter.yaml
Gbaa mbọ hụ na ọrụ niile na-eji iwu a:
kubectl --namespace=monitoring get all --selector=app=prometheus-blackbox-exporter
Nyochaa igbe ojii
Ị nwere ike iji nweta ihe nrụnye webụ onye na-ebupụ Blackbox port-forward
:
kubectl --namespace=monitoring port-forward svc/prometheus-blackbox-exporter 9115:9115
Jikọọ na ihe nchọgharị weebụ onye na-ebupụ Blackbox site na ihe nchọgharị weebụ na
Ọ bụrụ na ịga na adreesị
Uru metrik probe_success
hà 1 pụtara ịga nke ọma nlele. Uru nke 0 na-egosi mperi.
Ịtọlite Prometheus
Mgbe ebupụsịrị BlackBox mbupụ, anyị na-ahazi Prometheus n'ime prometheus-additional.yaml
.
- job_name: 'kube-api-blackbox'
scrape_interval: 1w
metrics_path: /probe
params:
module: [http_2xx]
static_configs:
- targets:
- https://www.google.com
- http://www.example.com
- https://prometheus.io
relabel_configs:
- source_labels: [__address__]
target_label: __param_target
- source_labels: [__param_target]
target_label: instance
- target_label: __address__
replacement: prometheus-blackbox-exporter:9115 # The blackbox exporter.
Anyị na-emepụta Secret
iji iwu na-esonụ.
PROMETHEUS_ADD_CONFIG=$(cat prometheus-additional.yaml | base64)
cat << EOF | kubectl --namespace=monitoring apply -f -
apiVersion: v1
kind: Secret
metadata:
name: additional-scrape-configs
type: Opaque
data:
prometheus-additional.yaml: $PROMETHEUS_ADD_CONFIG
EOF
Anyị na-egosi additional-scrape-configs
maka Prometheus Operator iji additionalScrapeConfigs
.
kubectl --namespace=monitoring edit prometheuses k8s
...
spec:
additionalScrapeConfigs:
key: prometheus-additional.yaml
name: additional-scrape-configs
Anyị na-aga na interface weebụ Prometheus wee lelee metrik na ebumnuche.
kubectl --namespace=monitoring port-forward svc/prometheus-k8s 9090:9090
Anyị na-ahụ metrik na ebumnuche nke Blackbox.
Ịgbakwunye iwu maka amamọkwa (ọmụma)
Iji nweta ọkwa n'aka onye na-ebupụ Blackbox, anyị ga-agbakwunye iwu na Prometheus Operator.
kubectl --namespace=monitoring edit prometheusrules prometheus-k8s-rules
...
- name: blackbox-exporter
rules:
- alert: ProbeFailed
expr: probe_success == 0
for: 5m
labels:
severity: error
annotations:
summary: "Probe failed (instance {{ $labels.instance }})"
description: "Probe failedn VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: SlowProbe
expr: avg_over_time(probe_duration_seconds[1m]) > 1
for: 5m
labels:
severity: warning
annotations:
summary: "Slow probe (instance {{ $labels.instance }})"
description: "Blackbox probe took more than 1s to completen VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: HttpStatusCode
expr: probe_http_status_code <= 199 OR probe_http_status_code >= 400
for: 5m
labels:
severity: error
annotations:
summary: "HTTP Status Code (instance {{ $labels.instance }})"
description: "HTTP status code is not 200-399n VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: SslCertificateWillExpireSoon
expr: probe_ssl_earliest_cert_expiry - time() < 86400 * 30
for: 5m
labels:
severity: warning
annotations:
summary: "SSL certificate will expire soon (instance {{ $labels.instance }})"
description: "SSL certificate expires in 30 daysn VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: SslCertificateHasExpired
expr: probe_ssl_earliest_cert_expiry - time() <= 0
for: 5m
labels:
severity: error
annotations:
summary: "SSL certificate has expired (instance {{ $labels.instance }})"
description: "SSL certificate has expired alreadyn VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: HttpSlowRequests
expr: avg_over_time(probe_http_duration_seconds[1m]) > 1
for: 5m
labels:
severity: warning
annotations:
summary: "HTTP slow requests (instance {{ $labels.instance }})"
description: "HTTP request took more than 1sn VALUE = {{ $value }}n LABELS: {{ $labels }}"
- alert: SlowPing
expr: avg_over_time(probe_icmp_duration_seconds[1m]) > 1
for: 5m
labels:
severity: warning
annotations:
summary: "Slow ping (instance {{ $labels.instance }})"
description: "Blackbox ping took more than 1sn VALUE = {{ $value }}n LABELS: {{ $labels }}"
N'ime ebe nrụọrụ weebụ Prometheus, gaa na Ọnọdụ => Iwu wee chọta iwu njikere maka blackbox-exporter.
Ịhazi ọkwa Kubernetes API nkesa Asambodo SSL
Ka anyị hazie Kubernetes API Saịtị SSL nlekota ngafe. Ọ ga-eziga ọkwa otu ugboro n'izu.
Na-agbakwunye modul mbupụ igbe ojii maka nyocha Kubernetes API Server.
kubectl --namespace=monitoring edit configmap prometheus-blackbox-exporter
...
kube-api:
http:
method: GET
no_follow_redirects: false
preferred_ip_protocol: ip4
tls_config:
insecure_skip_verify: false
ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
valid_http_versions:
- HTTP/1.1
- HTTP/2
valid_status_codes: []
prober: http
timeout: 5s
Na-agbakwụnye nhazi nhazi Prometheus scrape
- job_name: 'kube-api-blackbox'
metrics_path: /probe
params:
module: [kube-api]
static_configs:
- targets:
- https://kubernetes.default.svc/api
relabel_configs:
- source_labels: [__address__]
target_label: __param_target
- source_labels: [__param_target]
target_label: instance
- target_label: __address__
replacement: prometheus-blackbox-exporter:9115 # The blackbox exporter.
Iji Prometheus Secret
PROMETHEUS_ADD_CONFIG=$(cat prometheus-additional.yaml | base64)
cat << EOF | kubectl --namespace=monitoring apply -f -
apiVersion: v1
kind: Secret
metadata:
name: additional-scrape-configs
type: Opaque
data:
prometheus-additional.yaml: $PROMETHEUS_ADD_CONFIG
EOF
Na-agbakwụnye iwu njikere
kubectl --namespace=monitoring edit prometheusrules prometheus-k8s-rules
...
- name: k8s-api-server-cert-expiry
rules:
- alert: K8sAPIServerSSLCertExpiringAfterThreeMonths
expr: probe_ssl_earliest_cert_expiry{job="kube-api-blackbox"} - time() < 86400 * 90
for: 1w
labels:
severity: warning
annotations:
summary: "Kubernetes API Server SSL certificate will expire after three months (instance {{ $labels.instance }})"
description: "Kubernetes API Server SSL certificate expires in 90 daysn VALUE = {{ $value }}n LABELS: {{ $labels }}"
Njikọ ndị bara uru
isi: www.habr.com