chore: add probes on all containers

deploy/charts/x509-certificate-exporter/templates/daemonset.yaml

@@ -136,9 +136,21 @@ spec:
         - {{ tpl (. | toYaml) $ | indent 10 | trim }}
         {{- end }}
       {{- if not $.Values.rbacProxy.enabled }}
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: metrics
+          initialDelaySeconds: 5
+          periodSeconds: 3
         ports:
         - name: metrics
           containerPort: {{ $.Values.podListenPort }}
+        readinessProbe:
+          httpGet:
+            path: /healthz
+            port: metrics
+          initialDelaySeconds: 5
+          periodSeconds: 3
       {{- else }}
       - name: kube-rbac-proxy
         {{- with $.Values.rbacProxy.securityContext }}
@@ -157,9 +169,21 @@ spec:
           valueFrom:
             fieldRef:
               fieldPath: status.podIP
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: metrics
+          initialDelaySeconds: 5
+          periodSeconds: 3
         ports:
         - name: metrics
           containerPort: {{ $.Values.podListenPort }}
+        readinessProbe:
+          httpGet:
+            path: /healthz
+            port: metrics
+          initialDelaySeconds: 5
+          periodSeconds: 3
         {{- with $.Values.rbacProxy.resources }}
         resources:
         {{- . | toYaml | trim | nindent 10 }}

deploy/charts/x509-certificate-exporter/templates/deployment.yaml

@@ -133,9 +133,21 @@ spec:
         {{- end }}
       {{- if not .Values.rbacProxy.enabled }}
         - --listen-address=:{{ .Values.podListenPort }}
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: metrics
+          initialDelaySeconds: 5
+          periodSeconds: 3
         ports:
         - name: metrics
           containerPort: {{ .Values.podListenPort }}
+        readinessProbe:
+          httpGet:
+            path: /healthz
+            port: metrics
+          initialDelaySeconds: 5
+          periodSeconds: 3
       {{- else }}
         - --listen-address=:{{ .Values.rbacProxy.upstreamListenPort }}
       - name: kube-rbac-proxy
@@ -155,9 +167,21 @@ spec:
           valueFrom:
             fieldRef:
               fieldPath: status.podIP
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: metrics
+          initialDelaySeconds: 5
+          periodSeconds: 3
         ports:
         - name: metrics
           containerPort: {{ .Values.podListenPort }}
+        readinessProbe:
+          httpGet:
+            path: /healthz
+            port: metrics
+          initialDelaySeconds: 5
+          periodSeconds: 3
         {{- with .Values.rbacProxy.resources }}
         resources:
         {{- . | toYaml | trim | nindent 10 }}

go.mod

@@ -4,6 +4,7 @@ go 1.21
 
 require (
 	github.com/bmatcuk/doublestar/v4 v4.6.1
+	github.com/dimiro1/health v0.0.0-20231118160444-e388c68d7d7e
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/pborman/getopt/v2 v2.1.0
 	github.com/pkg/errors v0.9.1

go.sum

@@ -1,3 +1,4 @@
+github.com/DATA-DOG/go-sqlmock v1.3.3/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
@@ -7,10 +8,13 @@ github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSV
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dimiro1/health v0.0.0-20231118160444-e388c68d7d7e h1:MPc833fnULks8D8FZwut9nDjRnxZlo4kmpAph09ChXw=
+github.com/dimiro1/health v0.0.0-20231118160444-e388c68d7d7e/go.mod h1:k1oeNKpjma0O03u8mKfiKIDXPvqA3VDYq9+QNcPPvuE=
 github.com/emicklei/go-restful/v3 v3.11.2 h1:1onLa9DcsMYO9P+CXaL0dStDqQ2EHHXLiz+BtnqkLAU=
 github.com/emicklei/go-restful/v3 v3.11.2/go.mod h1:6n3XBCmQQb25CM2LCACGz8ukIrRry+4bhvbpWn3mrbc=
 github.com/enix/doublestar/v4 v4.0.0-20230517083426-fa6d1b0d071d h1:XgDfI7CiZqA4yTAb1gGilrci8zfoHqN311QqHOor3Pw=
 github.com/enix/doublestar/v4 v4.0.0-20230517083426-fa6d1b0d071d/go.mod h1:xBQ8jztBU6kakFMg+8WGxn0c6z1fTSPVIjEY1Wr7jzc=
+github.com/garyburd/redigo v0.0.0-20160302234602-4ed1111375cb/go.mod h1:NR3MbYisc3/PwhQ00EMzDiPmrwpPxAn5GI05/YaO1SY=
 github.com/go-kit/log v0.2.1 h1:MRVx0/zhvdseW+Gza6N9rVzU/IVzaeE1SFI4raAhmBU=
 github.com/go-kit/log v0.2.1/go.mod h1:NwTd00d/i8cPZ3xOwwiv2PO5MOcx78fFErGNcVmBjv0=
 github.com/go-logfmt/logfmt v0.6.0 h1:wGYYu3uicYdqXVgoYbvnkrPVXkuLM1p1ifugDMEdRi4=
@@ -32,6 +36,7 @@ github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaS
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
+github.com/gomodule/redigo v2.0.0+incompatible/go.mod h1:B4C85qUVwatsJoIUNIfCRsp7qO0iAmpGFZ4EELWSbC4=
 github.com/google/gnostic-models v0.6.8 h1:yo/ABAfM5IMRsS1VnXjTBvUb61tFIHozhlYvRgGre9I=
 github.com/google/gnostic-models v0.6.8/go.mod h1:5n7qKqH0f5wFt+aWF8CW6pZLLNOfYuF5OpfBSENuI8U=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@@ -94,6 +99,7 @@ github.com/prometheus/exporter-toolkit v0.11.0 h1:yNTsuZ0aNCNFQ3aFTD2uhPOvr4iD7f
 github.com/prometheus/exporter-toolkit v0.11.0/go.mod h1:BVnENhnNecpwoTLiABx7mrPB/OLRIgN74qlQbV+FK1Q=
 github.com/prometheus/procfs v0.12.0 h1:jluTpSng7V9hY0O2R9DzzJHYb2xULk9VTR1V1R/k6Bo=
 github.com/prometheus/procfs v0.12.0/go.mod h1:pcuDEFsWDnvcgNzo4EEweacyhjeA9Zk3cnaOZAZEfOo=
+github.com/rafaeljusto/redigomock v0.0.0-20190202135759-257e089e14a1/go.mod h1:JaY6n2sDr+z2WTsXkOmNRUfDy6FN0L6Nk7x06ndm4tY=
 github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
 github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=

internal/exporter.go

@@ -19,6 +19,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 
 	"github.com/bmatcuk/doublestar/v4"
+	"github.com/dimiro1/health"
 	"github.com/prometheus/common/promlog"
 	"github.com/prometheus/exporter-toolkit/web"
 	log "github.com/sirupsen/logrus"
@@ -87,6 +88,7 @@ func (exporter *Exporter) Listen() error {
 // Serve : Actually reply to requests
 func (exporter *Exporter) Serve() error {
 	mux := http.NewServeMux()
+	mux.Handle("/healthz", health.NewHandler())
 	mux.Handle("/metrics", promhttp.Handler())
 
 	exporter.server = &http.Server{