From 7c5118d1ce29ebc65292744de141d4ed60487104 Mon Sep 17 00:00:00 2001 From: Gianluca Arbezzano Date: Fri, 24 May 2019 11:02:09 +0200 Subject: [PATCH] Create a canned resouces to runtime create k8s cluster. Fixed #56 This is still a wip but I think, this is the right direction Signed-off-by: Gianluca Arbezzano --- .travis.yml | 4 +- canned/kind.go | 159 ++++++++++++++++++++++++++++++++++++++++++++ canned/kind_test.go | 104 +++++++++++++++++++++++++++++ docker.go | 18 +++++ go.mod | 11 ++- go.sum | 134 +++++++++++++++++++++++++++++++++++++ wait/http.go | 9 +-- 7 files changed, 427 insertions(+), 12 deletions(-) create mode 100644 canned/kind.go create mode 100644 canned/kind_test.go diff --git a/.travis.yml b/.travis.yml index 71dd2c70f3..bbbbfd383e 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,8 +1,6 @@ language: go go: - - 1.11.4 - -install: true + - 1.12.4 services: - docker diff --git a/canned/kind.go b/canned/kind.go new file mode 100644 index 0000000000..3a5749ce91 --- /dev/null +++ b/canned/kind.go @@ -0,0 +1,159 @@ +package canned + +import ( + "context" + "fmt" + "io" + "math/rand" + "time" + + "github.com/docker/docker/api/types/filters" + "github.com/docker/go-connections/nat" + "github.com/pkg/errors" + testcontainers "github.com/testcontainers/testcontainers-go" + "k8s.io/client-go/kubernetes" + "k8s.io/client-go/tools/clientcmd" + "sigs.k8s.io/kind/pkg/cluster" + "sigs.k8s.io/kind/pkg/cluster/config/encoding" + "sigs.k8s.io/kind/pkg/cluster/create" + "sigs.k8s.io/kind/pkg/util" +) + +// seededRand provides the rand function to calculate a different name for +// every kind cluster. +var seededRand *rand.Rand = rand.New(rand.NewSource(time.Now().UnixNano())) + +// namePrefix is the fixed part that the container name created by kind will +// have +const namePrefix = "testcontainers-" + +// dataPlanFromKind is the suffix kind attaches to all the containers +const dataPlanFromKind = "-control-plane" + +// Implement interfaces +var _ testcontainers.Container = (*KubeKindContainer)(nil) + +// KubeKindContainer is the struct that spins up a Kubernetes Cluster via +// Kind. +type KubeKindContainer struct { + container testcontainers.Container + kindContext *cluster.Context + clientset *kubernetes.Clientset + clusterName string +} + +func (k *KubeKindContainer) Endpoint(ctx context.Context, endpoint string) (string, error) { + return k.container.Endpoint(ctx, endpoint) +} + +func (k *KubeKindContainer) PortEndpoint(ctx context.Context, port nat.Port, s string) (string, error) { + return k.container.PortEndpoint(ctx, port, s) +} + +func (k *KubeKindContainer) Host(ctx context.Context) (string, error) { + return k.container.Host(ctx) +} + +func (k *KubeKindContainer) MappedPort(ctx context.Context, p nat.Port) (nat.Port, error) { + return k.container.MappedPort(ctx, p) +} + +func (k *KubeKindContainer) Ports(ctx context.Context) (nat.PortMap, error) { + return k.container.Ports(ctx) +} + +func (k *KubeKindContainer) SessionID() string { + return k.container.SessionID() +} + +// GetContainerID returns the container ID from Docker +func (k *KubeKindContainer) GetContainerID() string { + return k.container.GetContainerID() +} + +// GetClientset returns a configured Kubernetes Clientset ready to be used. +func (k *KubeKindContainer) GetClientset() (*kubernetes.Clientset, error) { + if k.clientset != nil { + return k.clientset, nil + } + config, err := clientcmd.BuildConfigFromFlags("", k.kindContext.KubeConfigPath()) + if err != nil { + return nil, err + } + clientset, err := kubernetes.NewForConfig(config) + if err != nil { + return nil, err + } + k.clientset = clientset + return k.clientset, nil +} + +// Start creates and runs the container. +func (k *KubeKindContainer) Start(ctxMain context.Context) error { + renameAttempt := 0 +rename: + k.clusterName = fmt.Sprintf("%s%d", namePrefix, seededRand.Int()) + kubeconfig := "" + cfg, err := encoding.Load(kubeconfig) + if err != nil { + return errors.Wrap(err, "error loading config") + } + + // validate the config. + err = cfg.Validate() + if err != nil { + configErrors := err.(util.Errors) + return configErrors.Errors()[0] + } + + known, err := cluster.IsKnown(k.clusterName) + if err != nil { + return err + } + if known { + if renameAttempt > 9 { + return errors.Errorf("a cluster with the name %q already exists", k.clusterName) + } + renameAttempt = renameAttempt + 1 + goto rename + } + k.kindContext = cluster.NewContext(k.clusterName) + if err = k.kindContext.Create(cfg, + create.Retain(false), + create.WaitForReady(time.Minute*5), + ); err != nil { + return errors.Wrap(err, "failed to create cluster") + } + args := filters.NewArgs(filters.Arg("name", k.clusterName+dataPlanFromKind)) + if err != nil { + return err + } + p, err := testcontainers.NewDockerProvider() + if err != nil { + return err + } + c, err := p.ContainerFromDockerArgs(ctxMain, args) + if err != nil { + return err + } + k.container = c + return nil +} + +// Logs returns a Reader with the logs from the container. +func (k *KubeKindContainer) Logs(ctx context.Context) (io.ReadCloser, error) { + return k.container.Logs(ctx) +} + +// Name returns the name of Kind cluster (not the container). +func (k *KubeKindContainer) Name(ctxMain context.Context) (string, error) { + return k.clusterName, nil +} + +// Terminate deletes the cluster via Kind. +func (k *KubeKindContainer) Terminate(ctxMain context.Context) error { + if err := k.kindContext.Delete(); err != nil { + return errors.Wrap(err, "failed to delete cluster") + } + return nil +} diff --git a/canned/kind_test.go b/canned/kind_test.go new file mode 100644 index 0000000000..80a2209b40 --- /dev/null +++ b/canned/kind_test.go @@ -0,0 +1,104 @@ +package canned + +import ( + "context" + "io/ioutil" + "strings" + "testing" + "time" + + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" +) + +func TestKindCreationAndTermination(t *testing.T) { + ctx := context.Background() + k := &KubeKindContainer{} + err := k.Start(ctx) + if err != nil { + t.Fatal(err.Error()) + } + time.Sleep(2 * time.Second) + err = k.Terminate(ctx) + if err != nil { + t.Fatal(err.Error()) + } +} + +func TestGetDefaultNamespace(t *testing.T) { + ctx := context.Background() + k := &KubeKindContainer{} + err := k.Start(ctx) + if err != nil { + t.Fatal(err.Error()) + } + defer k.Terminate(ctx) + clientset, err := k.GetClientset() + if err != nil { + t.Fatal(err.Error()) + } + ns, err := clientset.CoreV1().Namespaces().Get("default", metav1.GetOptions{}) + if err != nil { + t.Fatal(err.Error()) + } + if ns.GetName() != "default" { + t.Fatalf("Expected default namespace got %s", ns.GetName()) + } +} + +func TestGetLogs(t *testing.T) { + ctx := context.Background() + k := &KubeKindContainer{} + err := k.Start(ctx) + if err != nil { + t.Fatal(err.Error()) + } + defer k.Terminate(ctx) + reader, err := k.Logs(ctx) + if err != nil { + t.Fatal(err.Error()) + } + b, err := ioutil.ReadAll(reader) + logs := string(b) + if !strings.Contains(logs, "Initializing machine ID from random generator") { + t.Fatal("Didn't find the sentence \"Initializing machine ID from random generator\"") + } +} + +func ExampleKubeKindContainer_Start() { + ctx := context.Background() + k := &KubeKindContainer{} + err := k.Start(ctx) + if err != nil { + panic(err.Error()) + } +} + +func ExampleKubeKindContainer_Terminate() { + ctx := context.Background() + k := &KubeKindContainer{} + err := k.Start(ctx) + if err != nil { + panic(err.Error()) + } + defer k.Terminate(ctx) +} + +func ExampleKubeKindContainer_Logs() { + ctx := context.Background() + k := &KubeKindContainer{} + err := k.Start(ctx) + if err != nil { + panic(err.Error()) + } + defer k.Terminate(ctx) + + reader, err := k.Logs(ctx) + if err != nil { + panic(err.Error()) + } + b, err := ioutil.ReadAll(reader) + logs := string(b) + if !strings.Contains(logs, "Reached target") { + panic("Reached target") + } +} diff --git a/docker.go b/docker.go index 73d87ce649..5fbe8fcf44 100644 --- a/docker.go +++ b/docker.go @@ -10,6 +10,8 @@ import ( "os/exec" "strings" + "github.com/docker/docker/api/types/filters" + "github.com/docker/docker/api/types" "github.com/docker/docker/api/types/container" "github.com/docker/docker/api/types/mount" @@ -203,6 +205,22 @@ func NewDockerProvider() (*DockerProvider, error) { return p, nil } +func (p *DockerProvider) ContainerFromDockerArgs(ctx context.Context, args filters.Args) (*DockerContainer, error) { + containers, err := p.client.ContainerList(ctx, types.ContainerListOptions{ + Filters: args, + }) + if err != nil { + return nil, err + } + if len(containers) != 1 { + return nil, errors.Errorf("Impossible to get container associated to this cluster. Cluster terminated.") + } + return &DockerContainer{ + ID: containers[0].ID, + provider: p, + }, nil +} + // CreateContainer fulfills a request for a container without starting it func (p *DockerProvider) CreateContainer(ctx context.Context, req ContainerRequest) (Container, error) { exposedPortSet, exposedPortMap, err := nat.ParsePortSpecs(req.ExposedPorts) diff --git a/go.mod b/go.mod index 906825994e..fcce15faa2 100644 --- a/go.mod +++ b/go.mod @@ -9,19 +9,24 @@ require ( github.com/docker/go-connections v0.4.0 github.com/docker/go-units v0.3.3 // indirect github.com/go-sql-driver/mysql v1.4.1 - github.com/gogo/protobuf v1.2.0 // indirect github.com/google/go-cmp v0.2.0 // indirect github.com/gorilla/context v1.1.1 // indirect github.com/gorilla/mux v1.6.2 // indirect + github.com/imdario/mergo v0.3.7 // indirect + github.com/kardianos/govendor v1.0.9 // indirect github.com/kr/pretty v0.1.0 // indirect + github.com/moby/moby v1.13.1 github.com/opencontainers/go-digest v1.0.0-rc1 // indirect github.com/opencontainers/image-spec v1.0.1 // indirect github.com/pkg/errors v0.8.0 + github.com/prometheus/common v0.4.1 github.com/satori/go.uuid v1.2.0 - github.com/sirupsen/logrus v1.2.0 // indirect - golang.org/x/sys v0.0.0-20181228144115-9a3f9b0469bb // indirect golang.org/x/time v0.0.0-20181108054448-85acf8d2951c // indirect google.golang.org/grpc v1.17.0 // indirect gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect gotest.tools v2.2.0+incompatible // indirect + k8s.io/apimachinery v0.0.0-20190404173353-6a84e37a896d + k8s.io/client-go v11.0.0+incompatible + k8s.io/utils v0.0.0-20190520173318-324c5df7d3f0 // indirect + sigs.k8s.io/kind v0.3.0 ) diff --git a/go.sum b/go.sum index f2bbc89fbd..e1dd409530 100644 --- a/go.sum +++ b/go.sum @@ -3,9 +3,23 @@ github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 h1:w+iIsaOQNcT7O github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8= github.com/Microsoft/go-winio v0.4.11 h1:zoIOcVf0xPN1tnMVbTtEdI+P8OofVk3NObnwOQ6nK2Q= github.com/Microsoft/go-winio v0.4.11/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA= +github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb06e3pkSAbeQ52E9H9iFoQsEEwGN64994WTCIhntQ= github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 h1:TngWCqHvy9oXAN6lEVMRuU21PR1EtLVZJmdB18Gu3Rw= github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5/go.mod h1:lmUJ/7eu/Q8D7ML55dXQrVaamCz2vxCfdQBasLZfHKk= +github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0= +github.com/PuerkitoBio/purell v1.1.0 h1:rmGxhojJlM0tuKtfdvliR84CFHljx9ag64t2xmVkjK4= +github.com/PuerkitoBio/purell v1.1.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0= +github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE= +github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 h1:d+Bc7a5rLufV/sSk/8dngufqelfh6jnri85riMAaF/M= +github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE= +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc h1:cAKDfWh5VpdgMhJosfJnn5/FoN2SRZ4p7fJNX58YPaU= +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf h1:qet1QNfXsQxTZqLG4oE62mJzwPIB8+Tee4RNCL9ulrY= +github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q= github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw= +github.com/davecgh/go-spew v0.0.0-20151105211317-5215b55f46b2/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +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/docker/distribution v2.7.0+incompatible h1:neUDAlf3wX6Ml4HdqTrbcOHXtfRN0TFIwt6YFL7N9RU= @@ -19,68 +33,188 @@ github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKoh github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec= github.com/docker/go-units v0.3.3 h1:Xk8S3Xj5sLGlG5g67hJmYMmUgXv5N4PhkjJHHqrwnTk= github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk= +github.com/emicklei/go-restful v0.0.0-20170410110728-ff4f55a20633 h1:H2pdYOb3KQ1/YsqVWoWNLQO+fusocsw354rqGTZtAgw= +github.com/emicklei/go-restful v0.0.0-20170410110728-ff4f55a20633/go.mod h1:otzb+WCGbkyDHkqmQmT5YD2WR4BBwUdeQoFo8l/7tVs= +github.com/evanphx/json-patch v4.2.0+incompatible 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f5fe7b6d00..a55bd89b80 100644 --- a/wait/http.go +++ b/wait/http.go @@ -9,7 +9,6 @@ import ( "net/http" "os" "strconv" - "syscall" "time" "github.com/docker/go-connections/nat" @@ -134,11 +133,9 @@ func (ws *HTTPStrategy) WaitUntilReady(ctx context.Context, target StrategyTarge if err != nil { if v, ok := err.(*net.OpError); ok { - if v2, ok := (v.Err).(*os.SyscallError); ok { - if v2.Err == syscall.ECONNREFUSED { - time.Sleep(100 * time.Millisecond) - continue - } + if _, ok := (v.Err).(*os.SyscallError); ok { + time.Sleep(100 * time.Millisecond) + continue } } return err