commit eab7ebe7ff29e76fd9de3ffe090f050e5e39e855 Author: Christine Dodrill Date: Sat Nov 23 15:01:39 2019 +0000 initial commit diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..87df039 --- /dev/null +++ b/LICENSE @@ -0,0 +1,12 @@ +Copyright (c) 2019 Christine Dodrill + +Permission to use, copy, modify, and/or distribute this software for any +purpose with or without fee is hereby granted. + +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH +REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY +AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, +INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM +LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR +OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR +PERFORMANCE OF THIS SOFTWARE. \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..3f7e27d --- /dev/null +++ b/go.mod @@ -0,0 +1,10 @@ +module tulpa.dev/within/lumber + +go 1.13 + +require ( + golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e // indirect + k8s.io/api v0.0.0-20190819141258-3544db3b9e44 + k8s.io/apimachinery v0.0.0-20190817020851-f2f3a405f61d + k8s.io/client-go v0.0.0-20190819141724-e14f31a72a77 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..ff01fbd --- /dev/null +++ b/go.sum @@ -0,0 +1,91 @@ +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/Azure/go-autorest v11.1.2+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24= +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/dgrijalva/jwt-go v0.0.0-20160705203006-01aeca54ebda/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ= +github.com/docker/spdystream v0.0.0-20160310174837-449fdfce4d96/go.mod h1:Qh8CwZgvJUkLughtfhJv5dyTYa91l1fOUCrgjqmcifM= +github.com/elazarl/goproxy v0.0.0-20170405201442-c4fc26588b6e/go.mod h1:/Zj4wYkgs4iZTTu3o/KG3Itv/qCCa8VVMlb3i9OVuzc= +github.com/evanphx/json-patch v0.0.0-20190203023257-5858425f7550/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk= +github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo= +github.com/gogo/protobuf v0.0.0-20171007142547-342cbe0a0415 h1:WSBJMqJbLxsn+bTCPyPYZfqHdJmc8MK4wrBjMft6BAM= +github.com/gogo/protobuf v0.0.0-20171007142547-342cbe0a0415/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ= +github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc= +github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM= +github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= +github.com/google/btree v0.0.0-20160524151835-7d79101e329e/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ= +github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY= +github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU= +github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf h1:+RRA9JqSOZFfKrOeqr2z77+8R2RKyh8PG66dcu1V0ck= +github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf/go.mod h1:HP5RmnzzSNb993RKQDq4+1A4ia9nllfqcQFTQJedwGI= +github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo= +github.com/googleapis/gnostic v0.0.0-20170729233727-0c5108395e2d h1:7XGaL1e6bYS1yIonGp9761ExpPPV1ui0SAC59Yube9k= +github.com/googleapis/gnostic v0.0.0-20170729233727-0c5108395e2d/go.mod h1:sJBsCZ4ayReDTBIg8b9dl28c5xFWyhBTVRp3pOg5EKY= +github.com/gophercloud/gophercloud v0.0.0-20190126172459-c818fa66e4c8/go.mod h1:3WdhXV3rUYy9p6AUW8d94kr+HS62Y4VL9mBnFxsD8q4= +github.com/gregjones/httpcache v0.0.0-20170728041850-787624de3eb7/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA= +github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8= +github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU= +github.com/imdario/mergo v0.3.5 h1:JboBksRwiiAJWvIYJVo46AfV+IAIKZpfrSzVKj42R4Q= +github.com/imdario/mergo v0.3.5/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA= +github.com/json-iterator/go v0.0.0-20180701071628-ab8a2e0c74be h1:AHimNtVIpiBjPUhEF5KNCkrUyqTSA5zWUl8sQ2bfGBE= +github.com/json-iterator/go v0.0.0-20180701071628-ab8a2e0c74be/go.mod 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h1:AOxZTnaXR/xiarlQL0JUfwQPxjmKDvVYoRp58cA7lUo= +k8s.io/apimachinery v0.0.0-20190817020851-f2f3a405f61d h1:7Kns6qqhMAQWvGkxYOLSLRZ5hJO0/5pcE5lPGP2fxUw= +k8s.io/apimachinery v0.0.0-20190817020851-f2f3a405f61d/go.mod h1:3jediapYqJ2w1BFw7lAZPCx7scubsTfosqHkhXCWJKw= +k8s.io/client-go v0.0.0-20190819141724-e14f31a72a77 h1:w1BoabVnPpPqQCY3sHK4qVwa12Lk8ip1pKMR1C+qbdo= +k8s.io/client-go v0.0.0-20190819141724-e14f31a72a77/go.mod h1:DmkJD5UDP87MVqUQ5VJ6Tj9Oen8WzXPhk3la4qpyG4g= +k8s.io/klog v0.3.1 h1:RVgyDHY/kFKtLqh67NvEWIgkMneNoIrdkN0CxDSQc68= +k8s.io/klog v0.3.1/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk= +k8s.io/kube-openapi v0.0.0-20190228160746-b3a7cee44a30/go.mod h1:BXM9ceUBTj2QnfH2MK1odQs778ajze1RxcmP6S8RVVc= +k8s.io/utils v0.0.0-20190221042446-c2654d5206da h1:ElyM7RPonbKnQqOcw7dG2IK5uvQQn3b/WPHqD5mBvP4= +k8s.io/utils v0.0.0-20190221042446-c2654d5206da/go.mod h1:8k8uAuAQ0rXslZKaEWd0c3oVhZz7sSzSiPnVZayjIX0= +sigs.k8s.io/yaml v1.1.0 h1:4A07+ZFc2wgJwo8YNlQpr1rVlgUDlxXHhPJciaPY5gs= +sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= diff --git a/linesplitwriter.go b/linesplitwriter.go new file mode 100644 index 0000000..ae279a9 --- /dev/null +++ b/linesplitwriter.go @@ -0,0 +1,25 @@ +package main + +import ( + "bytes" + "io" +) + +type lineSplittingWriter struct { + writer io.Writer +} + +func (lsw lineSplittingWriter) Write(p []byte) (int, error) { + for _, line := range bytes.Split(p, []byte("\n")) { + if len(line) == 0 { + continue + } + + _, err := lsw.writer.Write(append(line, '\n')) + if err != nil { + return -1, err + } + } + + return len(p), nil +} diff --git a/main.go b/main.go new file mode 100644 index 0000000..4915102 --- /dev/null +++ b/main.go @@ -0,0 +1,83 @@ +package main + +import ( + "flag" + "fmt" + "io" + "log" + "os" + "path/filepath" + "sync" + + v1 "k8s.io/api/core/v1" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + "k8s.io/client-go/kubernetes" + corev1 "k8s.io/client-go/kubernetes/typed/core/v1" + "k8s.io/client-go/tools/clientcmd" + "k8s.io/client-go/util/homedir" +) + +var ( + home = homedir.HomeDir() + kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file") + namespace = flag.String("namespace", "apps", "namespace for the pods") + stream = flag.Bool("stream", false, "if set, livestream logs") +) + +func main() { + flag.Parse() + + config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig) + if err != nil { + panic(err) + } + + clientset, err := kubernetes.NewForConfig(config) + if err != nil { + panic(err) + } + + podsClient := clientset.CoreV1().Pods(*namespace) + + pods, err := podsClient.List(metav1.ListOptions{}) + if err != nil { + panic(err) + } + + var wg sync.WaitGroup + wg.Add(len(pods.Items)) + + for _, pod := range pods.Items { + if len(pod.Spec.Containers) != 1 { + wg.Add(len(pod.Spec.Containers) - 1) + } + + for _, ctr := range pod.Spec.Containers { + go dumpLogs(podsClient, &wg, pod.Name, ctr.Name) + } + } + + wg.Wait() +} + +func dumpLogs(podsClient corev1.PodExpansion, wg *sync.WaitGroup, podName, ctrName string) { + defer wg.Done() + + w := lineSplittingWriter{ + writer: prefixWriter(fmt.Sprintf("%25s | ", ctrName), os.Stdout), + } + + req := podsClient.GetLogs(podName, &v1.PodLogOptions{ + Container: ctrName, + Follow: *stream, + }) + + st, err := req.Stream() + if err != nil { + log.Printf("can't get logs for pod %s container %s: %v", podName, ctrName, err) + return + } + defer st.Close() + + io.Copy(w, st) +} diff --git a/prefixwriter.go b/prefixwriter.go new file mode 100644 index 0000000..6151f5f --- /dev/null +++ b/prefixwriter.go @@ -0,0 +1,32 @@ +package main + +import "io" + +type prefixingWriter struct { + prefix []byte + writer io.Writer +} + +func (pw *prefixingWriter) Write(p []byte) (int, error) { + if len(p) == 0 { + return 0, nil + } + + // Perform an "atomic" write of a prefix and p to make sure that it doesn't interleave + // sub-line when used concurrently with io.PipeWrite. + n, err := pw.writer.Write(append(pw.prefix, p...)) + if n > len(p) { + // To comply with the io.Writer interface requirements we must + // return a number of bytes written from p (0 <= n <= len(p)), + // so we are ignoring the length of the prefix here. + return len(p), err + } + return n, err +} + +func prefixWriter(prefix string, sink io.Writer) io.Writer { + return &prefixingWriter{ + prefix: []byte(prefix), + writer: sink, + } +}