From 5c5e8dcba183d117b31f877c49fdafbb5d25778a Mon Sep 17 00:00:00 2001 From: ston1th Date: Sun, 1 Dec 2019 00:52:25 +0100 Subject: [PATCH] first commit --- .gitignore | 1 + Dockerfile | 12 ++ LICENSE | 24 ++++ build.sh | 6 + config/00-namespace.yaml | 4 + config/01-podsecuritypolicy.yaml | 29 +++++ config/02-sa.yaml | 36 ++++++ config/deployment.yaml | 26 ++++ go.mod | 15 +++ go.sum | 202 +++++++++++++++++++++++++++++++ main.go | 96 +++++++++++++++ 11 files changed, 451 insertions(+) create mode 100644 .gitignore create mode 100644 Dockerfile create mode 100644 LICENSE create mode 100755 build.sh create mode 100644 config/00-namespace.yaml create mode 100644 config/01-podsecuritypolicy.yaml create mode 100644 config/02-sa.yaml create mode 100644 config/deployment.yaml create mode 100644 go.mod create mode 100644 go.sum create mode 100644 main.go diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..0a764a4 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +env diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..a1e5422 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,12 @@ +FROM golang:alpine as builder +RUN adduser -D -g '' appuser +RUN mkdir /build +ADD . /build/ +WORKDIR /build +RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -trimpath -gcflags 'all=-e' -ldflags "-s -w" -o main . +FROM scratch +COPY --from=builder /etc/passwd /etc/passwd +COPY --from=builder /build/main /main +USER appuser +EXPOSE 8080 +ENTRYPOINT ["/main"] diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..45785b1 --- /dev/null +++ b/LICENSE @@ -0,0 +1,24 @@ +Copyright (C) 2019 Marius Schellenberger +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + * The names of the authors and/or contributors may not be used to + endorse or promote products derived from this software without + specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL ston1th BE LIABLE FOR ANY +DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND +ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/build.sh b/build.sh new file mode 100755 index 0000000..342b0cc --- /dev/null +++ b/build.sh @@ -0,0 +1,6 @@ +#!/bin/bash + +source env +ko apply -f config/ +sleep 5 +kubectl -n pvc-reaper logs -f $(kubectl -n pvc-reaper get pod -ojsonpath='{.items[*].metadata.name}') diff --git a/config/00-namespace.yaml b/config/00-namespace.yaml new file mode 100644 index 0000000..06ec20a --- /dev/null +++ b/config/00-namespace.yaml @@ -0,0 +1,4 @@ +apiVersion: v1 +kind: Namespace +metadata: + name: pvc-reaper diff --git a/config/01-podsecuritypolicy.yaml b/config/01-podsecuritypolicy.yaml new file mode 100644 index 0000000..26f287f --- /dev/null +++ b/config/01-podsecuritypolicy.yaml @@ -0,0 +1,29 @@ +apiVersion: policy/v1beta1 +kind: PodSecurityPolicy +metadata: + name: pvc-reaper +spec: + privileged: false + allowPrivilegeEscalation: false + requiredDropCapabilities: + - ALL + readOnlyRootFilesystem: true + volumes: + - 'secret' + hostNetwork: false + hostIPC: false + hostPID: false + runAsUser: + rule: 'RunAsAny' + seLinux: + rule: 'RunAsAny' + supplementalGroups: + rule: 'MustRunAs' + ranges: + - min: 1 + max: 65535 + fsGroup: + rule: 'MustRunAs' + ranges: + - min: 1 + max: 65535 diff --git a/config/02-sa.yaml b/config/02-sa.yaml new file mode 100644 index 0000000..9d1ccae --- /dev/null +++ b/config/02-sa.yaml @@ -0,0 +1,36 @@ +apiVersion: v1 +kind: ServiceAccount +metadata: + name: pvc-reaper + namespace: pvc-reaper +--- +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + name: pvc-reaper + namespace: pvc-reaper +rules: +- apiGroups: [""] + resources: ["secrets"] + verbs: ["get"] +- apiGroups: [""] + resources: ["persistentvolumes", "persistentvolumeclaims"] + verbs: ["get", "list", "watch", "update", "patch", "delete"] +- apiGroups: ["policy"] + resources: ["podsecuritypolicies"] + resourceNames: ["pvc-reaper"] + verbs: ["use"] +--- +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRoleBinding +metadata: + name: pvc-reaper + namespace: pvc-reaper +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: ClusterRole + name: pvc-reaper +subjects: +- kind: ServiceAccount + name: pvc-reaper + namespace: pvc-reaper diff --git a/config/deployment.yaml b/config/deployment.yaml new file mode 100644 index 0000000..d8d4618 --- /dev/null +++ b/config/deployment.yaml @@ -0,0 +1,26 @@ +apiVersion: apps/v1 +kind: Deployment +metadata: + name: pvc-reaper + namespace: pvc-reaper + labels: + app: pvc-reaper +spec: + replicas: 1 + selector: + matchLabels: + app: pvc-reaper + template: + metadata: + labels: + app: pvc-reaper + spec: + serviceAccountName: pvc-reaper + containers: + - name: pvc-reaper + image: git.giftfish.de/ston1th/pvc-reaper + resources: + requests: + cpu: 100m + memory: 128Mi + imagePullPolicy: Always diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..01fe68c --- /dev/null +++ b/go.mod @@ -0,0 +1,15 @@ +module git.giftfish.de/ston1th/pvc-reaper + +go 1.13 + +require ( + github.com/googleapis/gnostic v0.3.1 // indirect + golang.org/x/crypto v0.0.0-20191128160524-b544559bb6d1 // indirect + golang.org/x/net v0.0.0-20191126235420-ef20fe5d7933 // indirect + golang.org/x/oauth2 v0.0.0-20191122200657-5d9234df094c // indirect + golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect + k8s.io/api v0.0.0-20191121015604-11707872ac1c + k8s.io/apimachinery v0.0.0-20191123233150-4c4803ed55e3 + k8s.io/client-go v0.0.0-20190918160344-1fbdaa4c8d90 + k8s.io/utils v0.0.0-20191114200735-6ca3b61696b6 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..1b41b9e --- /dev/null +++ b/go.sum @@ -0,0 +1,202 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI= +github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod h1:8Z9fGy2MpX0PvDjB1pEgQTmVqjGhiHBW7RJJEciWzS0= +github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA= +github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0= +github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0= +github.com/Azure/go-autorest/logger v0.1.0/go.mod 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h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= diff --git a/main.go b/main.go new file mode 100644 index 0000000..6f8d6a5 --- /dev/null +++ b/main.go @@ -0,0 +1,96 @@ +package main + +import ( + "log" + "os" + "os/signal" + "syscall" + "time" + + corev1 "k8s.io/api/core/v1" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + "k8s.io/apimachinery/pkg/types" + "k8s.io/client-go/informers" + "k8s.io/client-go/kubernetes" + "k8s.io/client-go/rest" + "k8s.io/client-go/tools/cache" +) + +func init() { + log.SetFlags(log.Flags() | log.Lshortfile) +} + +var emptyFinalizers = []byte(`{"metadata":{"finalizers":null}}`) + +func main() { + cfg, err := rest.InClusterConfig() + if err != nil { + log.Printf("error configuring kube client: %s\n", err) + os.Exit(1) + } + + cl, err := kubernetes.NewForConfig(cfg) + if err != nil { + log.Printf("error creating new kube client: %s\n", err) + os.Exit(1) + } + factory := informers.NewSharedInformerFactory(cl, time.Second*30) + pvcInformer := factory.Core().V1().PersistentVolumeClaims().Informer() + + pvcInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{ + AddFunc: func(obj interface{}) { + pvc, ok := obj.(*corev1.PersistentVolumeClaim) + if ok { + log.Printf("pvc added: %s/%s\n", pvc.Namespace, pvc.Name) + } + }, + DeleteFunc: func(obj interface{}) { + pvc, ok := obj.(*corev1.PersistentVolumeClaim) + if ok { + log.Printf("pvc deleted: %s/%s\n", pvc.Namespace, pvc.Name) + } + }, + UpdateFunc: func(_, obj interface{}) { + pvc, ok := obj.(*corev1.PersistentVolumeClaim) + owner := pvc.OwnerReferences + if !ok || pvc.DeletionTimestamp == nil || owner == nil { + return + } + if owner[0].APIVersion == "tekton.dev/v1alpha1" && + owner[0].Kind == "PipelineRun" { + pvs := cl.CoreV1().PersistentVolumes() + pv, err := pvs.Get(pvc.Spec.VolumeName, metav1.GetOptions{}) + if err != nil { + log.Printf("error getting pv %s: %s\n", pvc.Spec.VolumeName, err) + return + } + if pv.Finalizers != nil { + _, err = pvs.Patch(pv.Name, types.MergePatchType, emptyFinalizers) + if err != nil { + log.Printf("error patching pv %s: %s\n", pv.Name, err) + return + } + } + pvcs := cl.CoreV1().PersistentVolumeClaims(pvc.Namespace) + if pvc.Finalizers != nil { + _, err = pvcs.Patch(pvc.Name, types.MergePatchType, emptyFinalizers) + if err != nil { + log.Printf("error patching pvc %s/%s: %s\n", pvc.Namespace, pvc.Name, err) + return + } + } + log.Printf("pvc patched: %s/%s\n", pvc.Namespace, pvc.Name) + } + }, + }) + + stop := make(chan struct{}) + factory.Start(stop) + + sigs := make(chan os.Signal) + signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM) + log.Println("started signal handler") + sig := <-sigs + close(stop) + log.Printf("signal: %s\n", sig.String()) +}