From 8dd932b91838d11a02699739195988f983e33392 Mon Sep 17 00:00:00 2001 From: Milos Pejanovic Date: Mon, 11 Oct 2021 01:13:43 +0200 Subject: [PATCH] refactor delve --- cmd/actions/root.go | 1 - delve.go | 167 +++++++++++++++++++ delve/client.go | 66 ++++++++ delve/server.go | 67 ++++++++ dlv.go | 51 ------ exec/cmd.go | 8 +- exec/kubectl.go | 52 +++++- go.mod | 6 +- go.sum | 188 ++++++++++++++++++--- grappledlv.go | 388 -------------------------------------------- grappleutils.go | 22 +-- interrupt.go | 73 +++++++++ vscode.go | 9 +- 13 files changed, 591 insertions(+), 507 deletions(-) create mode 100644 delve.go create mode 100644 delve/client.go create mode 100644 delve/server.go delete mode 100644 dlv.go delete mode 100644 grappledlv.go create mode 100644 interrupt.go diff --git a/cmd/actions/root.go b/cmd/actions/root.go index 9bf569c..1768def 100644 --- a/cmd/actions/root.go +++ b/cmd/actions/root.go @@ -109,7 +109,6 @@ func Execute() { if err := rootCmd.Execute(); err != nil { l.Fatal(err) } - } func newLogger(verbose, jsonLog bool) *logrus.Entry { diff --git a/delve.go b/delve.go new file mode 100644 index 0000000..d65105e --- /dev/null +++ b/delve.go @@ -0,0 +1,167 @@ +package gograpple + +import ( + "fmt" + "os" + "path" + "path/filepath" + "strings" + "time" + + "github.com/foomo/gograpple/delve" +) + +const delveBin = "dlv" + +func (g Grapple) Delve(pod, container, sourcePath string, binArgs []string, host string, port int, delveContinue, vscode bool) error { + // validate k8s resources for delve session + if err := g.validatePod(&pod); err != nil { + return err + } + if err := g.validateContainer(&container); err != nil { + return err + } + if !g.isPatched() { + return fmt.Errorf("deployment not patched, stopping delve") + } + // populate bin args if empty + if len(binArgs) == 0 { + var err error + d, err := g.kubeCmd.GetDeploymentFromConfigMap(g.deployment.Name, defaultConfigMapDeploymentKey) + if err != nil { + return err + } + c, err := g.kubeCmd.GetContainerFromDeployment(container, d) + if err != nil { + return err + } + binArgs = c.Args + } + // validate sourcePath + goModPath, err := findGoProjectRoot(sourcePath) + if err != nil { + return fmt.Errorf("couldnt find go.mod path for source %q", sourcePath) + } + + delveServer := delve.NewKubeDelveServer(g.l, host, port) + return g.registerInterrupt(2*time.Second).wait( + func() error { + g.onExit(delveServer, pod, container) + return nil + }, + func() error { + // on(Re)Load + // run pre-start cleanup + if err := g.cleanupDelve(pod, container); err != nil { + return err + } + // deploy bin + if err := g.deployBin(pod, container, goModPath, sourcePath); err != nil { + return err + } + // exec delve server and port-forward to pod + go delveServer.Start(pod, container, g.binDestination(), delveContinue, binArgs) + // check server state with delve client + go g.checkDelveConnection(host, port) + // start vscode + if vscode { + if err := launchVSCode(g.l, goModPath, host, port, 5); err != nil { + return err + } + } + defer g.onExit(delveServer, pod, container) + return nil + }, + ) +} + +func (g Grapple) onExit(ds *delve.KubeDelveServer, pod, container string) { + // onExit + // try stopping the delve server regularly + if err := ds.Stop(); err != nil { + g.l.WithError(err).Warn("could not stop delve regularly") + } + // kill the remaining pids + if err := g.cleanupDelve(pod, container); err != nil { + g.l.WithError(err).Warn("could not cleanup delve") + } +} + +func (g Grapple) binName() string { + return g.deployment.Name +} + +func (g Grapple) binDestination() string { + return "/" + g.binName() +} + +func (g Grapple) cleanupDelve(pod, container string) error { + // get pids of delve and app were debugging + g.l.Info("killing debug processes") + binPids, errBinPids := g.getPIDsOf(pod, container, g.binName()) + if errBinPids != nil { + return errBinPids + } + delvePids, errDelvePids := g.getPIDsOf(pod, container, delveBin) + if errDelvePids != nil { + return errDelvePids + } + // kill pids directly on pod container + maxTries := 10 + pids := append(binPids, delvePids...) + return tryCall(g.l, maxTries, time.Millisecond*200, func(i int) error { + killErrs := g.kubeCmd.KillPidsOnPod(pod, container, pids, true) + if len(killErrs) == 0 { + return nil + } + return fmt.Errorf("could not kill processes after %v attempts", maxTries) + }) +} + +func (g Grapple) deployBin(pod, container, goModPath, sourcePath string) error { + binSource := path.Join(os.TempDir(), g.binName()) + g.l.Infof("building %q for debug", sourcePath) + + var relInputs []string + inputInfo, errInputInfo := os.Stat(sourcePath) + if errInputInfo != nil { + return errInputInfo + } + if inputInfo.IsDir() { + if files, err := os.ReadDir(sourcePath); err != nil { + return err + } else { + for _, file := range files { + if path.Ext(file.Name()) == ".go" { + relInputs = append(relInputs, strings.TrimPrefix(path.Join(sourcePath, file.Name()), goModPath+string(filepath.Separator))) + } + } + } + } else { + relInputs = append(relInputs, strings.TrimPrefix(sourcePath, goModPath+string(filepath.Separator))) + } + + _, errBuild := g.goCmd.Build(goModPath, binSource, relInputs, `-gcflags="all=-N -l"`).Env("GOOS=linux").Run() + if errBuild != nil { + return errBuild + } + + g.l.Infof("copying binary to pod %v", pod) + _, errCopyToPod := g.kubeCmd.CopyToPod(pod, container, binSource, g.binDestination()).Run() + return errCopyToPod +} + +func (g Grapple) checkDelveConnection(host string, port int) error { + return tryCall(g.l, 50, 200*time.Millisecond, func(i int) error { + delveClient, err := delve.NewKubeDelveClient(host, port, 3*time.Second) + if err != nil { + g.l.WithError(err).Warn("couldnt connect to delve server") + return err + } + if err := delveClient.ValidateState(); err != nil { + g.l.WithError(err).Warn("couldnt get running state from delve server") + return err + } + return nil + }) +} diff --git a/delve/client.go b/delve/client.go new file mode 100644 index 0000000..e2984b6 --- /dev/null +++ b/delve/client.go @@ -0,0 +1,66 @@ +package delve + +import ( + "errors" + "fmt" + "net" + "time" + + "github.com/go-delve/delve/service/rpc2" +) + +type KubeDelveClient struct { + *rpc2.RPCClient +} + +func NewKubeDelveClient(host string, port int, timeout time.Duration) (*KubeDelveClient, error) { + // connection timeouts suck with k8s, because the port is open and you can connect, but ... + // early on the connection is a dead and the timeout does not kick in, despite the fact + // that the connection is not "really" establised + var client *rpc2.RPCClient + conn, err := net.Dial("tcp", fmt.Sprintf("%v:%v", host, port)) + if err != nil { + return nil, err + } + chanClient := make(chan struct{}) + go func() { + // the next level of suck is the rpc client + // it does not return an error for its constructor, + // even though it actually does make a call and that fails + // and the cient will not do any other calls, + // because it has shutdown internally, without telling us + // at least that is what I understand here + client = rpc2.NewClientFromConn(conn) + chanClient <- struct{}{} + }() + select { + case <-time.After(timeout): + // this is the actual timeout, + // since the connection timeout does not work (on k8s) + conn.Close() + // l.Warn("dlv server check timeout", timeout) + return nil, errors.New("stale connection to dlv, aborting after timeout") + case <-chanClient: + // were good to go + } + return &KubeDelveClient{client}, nil +} + +func (kdc KubeDelveClient) ValidateState() error { + state, err := kdc.GetState() + if err != nil { + return err + } + if state.Exited { + // Exited indicates whether the debugged process has exited. + return fmt.Errorf("delve debugged process has exited") + } else if !state.Running { + // Running is true if the process is running and no other information can be collected. + // theres a case when you are in a breakpoint on a zombie process + // dlv will not handle that gracefully + return fmt.Errorf("delve debugged process is not running (is it a zombie, or has it been halted by a breakpoint)") + } else { + // were good + return nil + } +} diff --git a/delve/server.go b/delve/server.go new file mode 100644 index 0000000..a642b29 --- /dev/null +++ b/delve/server.go @@ -0,0 +1,67 @@ +package delve + +import ( + "fmt" + "os" + + "github.com/foomo/gograpple/exec" + "github.com/sirupsen/logrus" +) + +type KubeDelveServer struct { + l *logrus.Entry + host string + port int + kubeCmd *exec.KubectlCmd + process *os.Process +} + +func (kds KubeDelveServer) Host() string { + return kds.host +} + +func (kds KubeDelveServer) Port() int { + return kds.port +} + +func NewKubeDelveServer(l *logrus.Entry, host string, port int) *KubeDelveServer { + return &KubeDelveServer{l, host, port, exec.NewKubectlCommand(l), nil} +} + +func (kds *KubeDelveServer) Start(pod, container string, binDest string, useContinue bool, binArgs []string) error { + cmd := []string{ + "dlv", "exec", binDest, "--api-version=2", "--headless", + fmt.Sprintf("--listen=:%v", kds.port), "--accept-multiclient", + } + if useContinue { + cmd = append(cmd, "--continue") + } + if len(binArgs) > 0 { + cmd = append(cmd, "--") + cmd = append(cmd, binArgs...) + } + + // execute command to run dlv on container + // this will block until is killed or fails + _, err := kds.kubeCmd.ExecPod(pod, container, cmd).PostStart( + func(p *os.Process) error { + kds.process = p + // after starting + // port-forward from localhost to the pod + kds.l.Infof("port-forwarding %v pod for delve server", pod) + _, pfErr := kds.kubeCmd.PortForwardPod(pod, kds.host, kds.port).Run() + return pfErr + }, + ).Run() + return err +} + +func (kds *KubeDelveServer) Stop() error { + if kds.process == nil { + return fmt.Errorf("no process found, run start successfully first") + } + if err := kds.process.Release(); err != nil { + return err + } + return kds.process.Kill() +} diff --git a/dlv.go b/dlv.go deleted file mode 100644 index 4b4b8eb..0000000 --- a/dlv.go +++ /dev/null @@ -1,51 +0,0 @@ -package gograpple - -import ( - "errors" - "fmt" - "net" - "time" - - "github.com/go-delve/delve/service/api" - "github.com/go-delve/delve/service/rpc2" - "github.com/sirupsen/logrus" -) - -func checkDelveServer(l *logrus.Entry, host string, port int, timeout time.Duration, client *rpc2.RPCClient) (*rpc2.RPCClient, *api.DebuggerState, error) { - if client == nil { - // connection timeouts suck with k8s, because the port is open and you can connect, but ... - // early on the connection is a dead and the timeout does not kick in, despite the fact - // that the connection is not "really" establised - conn, err := net.DialTimeout("tcp", fmt.Sprintf("%v:%v", host, port), time.Hour) - if err != nil { - return nil, nil, err - } - chanClient := make(chan struct{}) - go func() { - // the next level of suck is the rpc client - // it does not return an error for its constructor, - // even though it actually does make a call and that fails - // and the cient will not do any other calls, - // because it has shutdown internally, without telling us - // at least that is what I understand here - client = rpc2.NewClientFromConn(conn) - chanClient <- struct{}{} - }() - select { - case <-time.After(timeout): - // this is the actual timeout, because the connetion timeout does not work, - conn.Close() - l.Debug("dlv server: connection closed due to timeout", timeout) - return nil, nil, errors.New("stale connection to dlv, aborting after timeout") - case <-chanClient: - // we are good to go - l.Debug("dlv server: good to go") - } - } - st, errState := client.GetState() - if errState != nil { - l.Debug("dlv server: could not get state while using client", errState) - return nil, nil, errState - } - return client, st, nil -} diff --git a/exec/cmd.go b/exec/cmd.go index b72aa7e..74eb633 100644 --- a/exec/cmd.go +++ b/exec/cmd.go @@ -12,7 +12,7 @@ import ( type Cmd struct { l *logrus.Entry - // cmd *exec.Cmd + // actual *exec.Cmd command []string cwd string env []string @@ -22,7 +22,7 @@ type Cmd struct { wait bool t time.Duration preStartFunc func() error - postStartFunc func() error + postStartFunc func(p *os.Process) error postEndFunc func() error } @@ -95,7 +95,7 @@ func (c *Cmd) PreStart(f func() error) *Cmd { return c } -func (c *Cmd) PostStart(f func() error) *Cmd { +func (c *Cmd) PostStart(f func(p *os.Process) error) *Cmd { c.postStartFunc = f return c } @@ -133,7 +133,7 @@ func (c *Cmd) Run() (string, error) { } if c.postStartFunc != nil { - if err := c.postStartFunc(); err != nil { + if err := c.postStartFunc(cmd.Process); err != nil { return "", err } } diff --git a/exec/kubectl.go b/exec/kubectl.go index 8f616bf..8e8a776 100644 --- a/exec/kubectl.go +++ b/exec/kubectl.go @@ -8,7 +8,8 @@ import ( "strings" "github.com/sirupsen/logrus" - v1 "k8s.io/api/apps/v1" + apps "k8s.io/api/apps/v1" + core "k8s.io/api/core/v1" ) type KubectlCmd struct { @@ -82,21 +83,20 @@ func (c KubectlCmd) ExposePod(pod string, host string, port int) *Cmd { fmt.Sprintf("--port=%v", port), fmt.Sprintf("--external-ip=%v", host)) } -func (c KubectlCmd) ForwardPod(pod string, host string, port int) *Cmd { - // kubectl port-forward pods/mongo-75f59d57f4-4nd6q 28015:27017 - return c.Args("port-forward", "pods/" + pod, strconv.Itoa(port) +":"+strconv.Itoa(port)) +func (c KubectlCmd) PortForwardPod(pod string, host string, port int) *Cmd { + return c.Args("port-forward", "pods/"+pod, strconv.Itoa(port)+":"+strconv.Itoa(port)) } func (c KubectlCmd) DeleteService(service string) *Cmd { return c.Args("delete", "service", service) } -func (c KubectlCmd) GetDeployment(deployment string) (*v1.Deployment, error) { +func (c KubectlCmd) GetDeployment(deployment string) (*apps.Deployment, error) { out, err := c.Args("get", "deployment", deployment, "-o", "json").Run() if err != nil { return nil, err } - var d v1.Deployment + var d apps.Deployment if err := json.Unmarshal([]byte(out), &d); err != nil { return nil, err } @@ -133,7 +133,7 @@ func (c KubectlCmd) GetPods(selectors map[string]string) ([]string, error) { return parseResources(out, "\n", "pod/") } -func (c KubectlCmd) GetContainers(deployment v1.Deployment) []string { +func (c KubectlCmd) GetContainers(deployment apps.Deployment) []string { var containers []string for _, c := range deployment.Spec.Template.Spec.Containers { containers = append(containers, c.Name) @@ -204,3 +204,41 @@ func parseResources(out, delimiter, prefix string) ([]string, error) { } return res, nil } + +func (c KubectlCmd) KillPidsOnPod(pod, container string, pids []string, murder bool) []error { + var errs []error + for _, pid := range pids { + cmd := []string{"kill"} + if murder { + cmd = append(cmd, "-s", "9") + } + cmd = append(cmd, pid) + _, errKill := c.ExecPod(pod, container, cmd).Run() + if errKill != nil { + errs = append(errs, errKill) + } + } + return errs +} + +func (c KubectlCmd) GetDeploymentFromConfigMap(deployment, configMapKey string) (*apps.Deployment, error) { + out, err := c.GetConfigMapKey(deployment, configMapKey) + if err != nil { + return nil, err + } + var d apps.Deployment + if err := json.Unmarshal([]byte(out), &d); err != nil { + return nil, err + } + return &d, nil + +} + +func (_ KubectlCmd) GetContainerFromDeployment(container string, d *apps.Deployment) (*core.Container, error) { + for _, c := range d.Spec.Template.Spec.Containers { + if c.Name == container { + return &c, nil + } + } + return nil, fmt.Errorf("no container %q found in deployment %q", container, d.Name) +} diff --git a/go.mod b/go.mod index 086bf3e..af9022d 100644 --- a/go.mod +++ b/go.mod @@ -3,16 +3,14 @@ module github.com/foomo/gograpple go 1.16 require ( - github.com/go-delve/delve v1.4.1 + github.com/go-delve/delve v1.7.2 github.com/gogo/protobuf v1.3.2 // indirect github.com/google/gofuzz v1.2.0 // indirect github.com/magefile/mage v1.11.0 // indirect github.com/sirupsen/logrus v1.7.1 - github.com/spf13/cobra v0.0.6 + github.com/spf13/cobra v1.1.3 golang.org/x/net v0.0.0-20210119194325-5f4716e94777 // indirect - golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c // indirect golang.org/x/text v0.3.5 // indirect - gopkg.in/yaml.v2 v2.4.0 // indirect gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c // indirect k8s.io/api v0.20.2 k8s.io/klog/v2 v2.5.0 // indirect diff --git a/go.sum b/go.sum index 25da1a8..68ce19e 100644 --- a/go.sum +++ b/go.sum @@ -1,31 +1,53 @@ 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= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= +cloud.google.com/go 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v0.0.0-20201112073958-5cba982894dd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c h1:VwygUrnw9jn88c4u8GD3rZQbqrP/tgas88tPUbBxQrk= -golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20210514084401-e8d321eab015 h1:hZR0X1kPW+nwyJ9xRxqZk1vx5RUObAPBdKVvXPDUH/E= +golang.org/x/sys v0.0.0-20210514084401-e8d321eab015/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= +golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk= golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ= golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= +golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= @@ -275,8 +377,20 @@ golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGm golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY= golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= +golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= +golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= +golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= +golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= +golang.org/x/tools v0.0.0-20190506145303-2d16b83fe98c/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= +golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= golang.org/x/tools v0.0.0-20190614205625-5aca471b1d59/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= +golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= +golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= +golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= +golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= +golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= +golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= golang.org/x/tools v0.0.0-20191127201027-ecd32218bd7f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= @@ -285,13 +399,28 @@ golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8T golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= +google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE= +google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M= +google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg= +google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg= +google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI= google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM= google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= +google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= +google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0= google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc= +google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= +google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= +google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= +google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= +google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= +google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= +google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= -google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= +google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38= +google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg= google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk= google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8= @@ -308,14 +437,17 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo= gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys= gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc= gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw= +gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k= gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo= gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw= gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74= gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY= gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ= @@ -323,7 +455,10 @@ gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c h1:grhR+C34yXImVGp7EzNk+DTIk+323eIUWOmEevy6bDo= gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= k8s.io/api v0.20.2 h1:y/HR22XDZY3pniu9hIFDLpUCPq2w5eQ6aV/VFQ7uJMw= k8s.io/api v0.20.2/go.mod h1:d7n6Ehyzx+S+cE3VhTGfVNNqtGc/oL9DCdYYahlurV8= k8s.io/apimachinery v0.20.2 h1:hFx6Sbt1oG0n6DZ+g4bFt5f6BoMkOjKWsQFu077M3Vg= @@ -334,6 +469,7 @@ k8s.io/klog/v2 v2.4.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y= k8s.io/klog/v2 v2.5.0 h1:8mOnjf1RmUPW6KRqQCfYSZq/K20Unmp3IhuZUhxl8KI= k8s.io/klog/v2 v2.5.0/go.mod h1:hy9LJ/NvuK+iVyP4Ehqva4HxZG/oXyIS3n3Jmire4Ec= k8s.io/kube-openapi v0.0.0-20201113171705-d219536bb9fd/go.mod h1:WOJ3KddDSol4tAGcJo0Tvi+dK12EcqSLqcWsryKMpfM= +rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8= rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4= sigs.k8s.io/structured-merge-diff/v4 v4.0.2/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw= sigs.k8s.io/structured-merge-diff/v4 v4.0.3 h1:4oyYo8NREp49LBBhKxEqCulFjg26rawYKrnCmg+Sr6c= diff --git a/grappledlv.go b/grappledlv.go deleted file mode 100644 index 30cb773..0000000 --- a/grappledlv.go +++ /dev/null @@ -1,388 +0,0 @@ -package gograpple - -import ( - "errors" - "fmt" - "log" - "os" - "os/signal" - "path" - "path/filepath" - "strings" - "sync" - "time" - - "github.com/go-delve/delve/service/rpc2" - "github.com/sirupsen/logrus" -) - -func (g Grapple) binDestination() string { - return "/" + g.deployment.Name -} - -func (g Grapple) Delve(pod, container, sourcePath string, args []string, host string, port int, delveContinue, vscode bool) error { - // validate resources and source path - if err := g.validatePod(&pod); err != nil { - return err - } - if err := g.validateContainer(&container); err != nil { - return err - } - goModDir, err := findGoProjectRoot(sourcePath) - if err != nil { - return fmt.Errorf("couldnt find go.mod dir for source path %q", sourcePath) - } - - // check is deployment patched - if !g.isPatched() { - return fmt.Errorf("deployment not patched, stopping delve") - } - - chanExitRun, lockingCleanup := g.getCleanupFunc(pod, container) - cmd, errCmd := g.dlvGetCommand(container, g.binDestination(), port, delveContinue, args) - if errCmd != nil { - return errCmd - } - - chanExit, chanReload, chanErr, errListenForInterrupts := listenForInterrupts(g.l.WithField("task", "interrupt-listener")) - if errListenForInterrupts != nil { - lockingCleanup("failed to listen interrupt signals: " + errListenForInterrupts.Error()) - return errListenForInterrupts - } - - chanRunErr := make(chan error) - iteration := 0 - run := func(chanExitRun chan struct{}) { - iteration++ - g.l.Infof("executing delve command on pod %v", pod) - _, errRun := g.kubeCmd.ExecPod(pod, container, cmd).PostStart( - g.dlvWatch(host, pod, port, iteration, lockingCleanup, vscode, goModDir, chanExitRun), - ).Run() - if errRun != nil && errRun.Error() != "signal: interrupt" { - chanRunErr <- errRun - } - } - g.l.Info("running initial cleanup, just in case ...") - g.dlvCleanup(g.l, pod, container) - go func() { - chanReload <- "initial load" - }() - for { - select { - case errRun := <-chanRunErr: - lockingCleanup(errRun.Error()) - return errRun - case <-chanExitRun: - - case <-chanExit: - lockingCleanup("termination") - return nil - case <-chanReload: - var binTemp string - var errRebuild error - wgReload := sync.WaitGroup{} - wgReload.Add(2) - go func() { - lockingCleanup("reload it baby") - wgReload.Done() - }() - go func() { - binTemp, errRebuild = g.rebuildAndUpload(goModDir, pod, container, sourcePath, binDest) - wgReload.Done() - }() - wgReload.Wait() - if errRebuild != nil { - return errRebuild - } - errMove := g.dlvMoveBinary(pod, container, binTemp, binDest) - if errMove != nil { - return errMove - } - go func() { - errExpose := g.dlvExpose(pod, host, port) - if errExpose != nil { - log.Println(errExpose) - } - }() - - go run(chanExitRun) - case err := <-chanErr: - lockingCleanup("an error occurred while listening for keyboard commands:" + err.Error()) - return err - } - } -} - -func (g Grapple) dlvGetCommand(container, binDest string, port int, delveContinue bool, args []string) (cmd []string, err error) { - cmd = []string{ - "dlv", "exec", binDest, - "--api-version=2", "--headless", - fmt.Sprintf("--listen=:%v", port), - "--accept-multiclient", - } - if delveContinue { - cmd = append(cmd, "--continue") - } - if len(args) == 0 { - args, err = g.getArgsFromConfigMap(g.deployment.Name, container) - if err != nil { - return nil, err - } - } - if len(args) > 0 { - cmd = append(cmd, "--") - cmd = append(cmd, args...) - } - return cmd, nil -} - -func (g Grapple) dlvMoveBinary(pod, container, binTemp, binDest string) error { - cmd := []string{"mv", binTemp, binDest} - _, errRun := g.kubeCmd.ExecPod(pod, container, cmd).Run() - return errRun - -} - -func (g Grapple) dlvWatch(host string, pod string, port, iteration int, cleanup func(reason string) error, vscode bool, goModDir string, chanExitRun chanCommand) func() error { - return func() error { - client, errTryDelveServer := dlvTryServer(g.l, host, port, 50, 200*time.Millisecond) - if errTryDelveServer != nil { - return errors.New("could not get dlv client: " + errTryDelveServer.Error()) - } - go func() { - i := 0 - for { - select { - case <-chanExitRun: - return - case <-time.After(1000 * time.Millisecond): - _, state, errState := dlvCheckServer(g.l.WithField("task", "watch-dlv"), host, port, 3*time.Second, client) - if errState != nil { - g.l.WithError(errState).Error("dlv seems to be down on", host, ":", port) - cleanup("dlv is down") - os.Exit(1) - } - if i%20 == 0 { - g.l.WithField("pid", client.ProcessPid()).Info("dlv is up") - } - if state.Exited { - cleanup("dlv state.Exited == true") - os.Exit(1) - } else if !state.Running { - // there still is the case, when you are in a breakpoint on a zombie process - // dlv will not handle that gracefully - g.l.WithField("pid", client.ProcessPid()).Info("dlv is up - process is not running - is it a zombie, or has it been halted by a breakpoint ?") - } - i++ - } - } - }() - if vscode { - if err := launchVscode(g.l, goModDir, pod, host, port, 5, iteration, 1*time.Second); err != nil { - return err - } - } - return nil - } -} - -func (g Grapple) getCleanupFunc(pod, container string, chanExitRun *chanCommand) (cleanup func(reason string) error) { - cleanupLock := sync.Mutex{} - cleanupStarted := false - return func(reason string) error { - cleanupLock.Lock() - defer cleanupLock.Unlock() - cl := g.l.WithField("reason", reason) - if cleanupStarted { - cl.Warning("aborting cleanup already started") - return nil - } - cleanupStarted = true - defer func() { - cleanupStarted = false - }() - cl.Info("cleaning up") - g.l.Debug("cleanup: writing to exit channel") - go func() { - *chanExitRun <- struct{}{} - }() - g.l.Debug("cleanup: running") - errDelveCleanup := g.dlvCleanup(cl, pod, container) - if errDelveCleanup != nil { - cl.WithError(errDelveCleanup).Error("could not clean up") - return errDelveCleanup - } - return nil - } -} - -func (g Grapple) dlvExpose(pod, host string, port int) error { - g.l.Infof("exposing deployment %v for delve", g.deployment.Name) - _, err := g.kubeCmd.ForwardPod(pod, host, port).Run() - if err != nil { - return err - } - return nil -} - -func (g Grapple) _dlvExpose(pod, host string, port int) error { - g.l.Infof("exposing deployment %v for delve", g.deployment.Name) - _, err := g.kubeCmd.ExposePod(pod, host, port).Run() - if err != nil { - return err - } - return nil -} - -func (g Grapple) dlvCleanup(l *logrus.Entry, pod, container string) error { - l.Infof("removing delve service") - outDeleteService, errDeleteService := g.kubeCmd.DeleteService(pod).Run() - if errDeleteService != nil { - l.WithError(errDeleteService).Warn("could not delete exposing service: " + outDeleteService) - } - l.Info("cleaning up debug processes") - const nameDLV = "dlv" - nameProgram := g.deployment.Name - pidsOfProgram, errGetPIDsOfProgram := g.getPIDsOf(pod, container, nameProgram) - if errGetPIDsOfProgram != nil { - return errGetPIDsOfProgram - } - pidsOfDLV, errGetPIDsOfDelve := g.getPIDsOf(pod, container, nameDLV) - if errGetPIDsOfDelve != nil { - return errGetPIDsOfDelve - } - kill := func(name string, pids []string, murder bool) (leftToKill []string) { - leftToKill = []string{} - for _, pid := range pids { - remainingPIDs, errGetPIDs := g.getPIDsOf(pod, container, name) - killed := true - if errGetPIDs == nil { - for _, remainingPID := range remainingPIDs { - if remainingPID == pid { - killed = false - break - } - } - } - if killed { - continue - } - cmd := []string{"kill"} - if murder { - cmd = append(cmd, "-s", "9") - } - cmd = append(cmd, pid) - outKill, errKill := g.kubeCmd.ExecPod(pod, container, cmd).Run() - if errKill != nil { - l.WithError(errKill).Warn("could not kill process", outKill) - } - leftToKill = append(leftToKill, pid) - - } - return leftToKill - } - const maxAttempts = 10 - for i := 0; i < maxAttempts; i++ { - pidsOfProgram = kill(nameProgram, pidsOfProgram, i > 0) - pidsOfDLV = kill(nameDLV, pidsOfDLV, i > 0) - if len(pidsOfDLV) == 0 && len(pidsOfProgram) == 0 { - return nil - } - time.Sleep(time.Millisecond * 200) - } - return fmt.Errorf("could not kill processes after max attempts %v", maxAttempts) -} - -func dlvTryServer(l *logrus.Entry, host string, port, tries int, sleep time.Duration) (client *rpc2.RPCClient, err error) { - errTryCall := tryCall(l, tries, sleep, func(i int) error { - l.Infof("checking delve connection on %v:%v (%v/%v)", host, port, i, tries) - newClient, _, errCheck := dlvCheckServer(l, host, port, 200*time.Millisecond, client) - client = newClient - return errCheck - }) - if errTryCall != nil { - return nil, errTryCall - } - l.Infof("delve server listening on %v:%v", host, port) - return client, nil -} - -type chanCommand chan struct{} - -func listenForInterrupts(l *logrus.Entry) (chanExit chanCommand, chanReload chan string, chanErr chan error, err error) { - sigchan := make(chan os.Signal, 1) - signal.Notify(sigchan) - chanExit = make(chanCommand) - chanReload = make(chan string) - chanErr = make(chan error) - i := 0 - exiting := false - readyToReset := false - durReset := 2 * time.Second - go func() { - for { - select { - case <-time.After(durReset): - if readyToReset { - l.Info("resetting termination timer") - readyToReset = false - } - i = 0 - case sig := <-sigchan: - switch sig { - case os.Interrupt: - l.Info("received interrupt signal, tigger one more interrupt within ", durReset, " to terminate") - readyToReset = true - if exiting { - l.Warn("already exiting - ignoring interupt") - continue - } - if i == 0 { - l.Info("triggering reload") - chanReload <- "interrupt => reload" - } else { - l.Info("triggering exit") - exiting = true - chanExit <- struct{}{} - } - i++ - } - } - } - }() - return chanExit, chanReload, chanErr, nil -} - -func (g Grapple) rebuildAndUpload(goModDir, pod, container, input, binDest string) (tempDest string, err error) { - binPath := path.Join(os.TempDir(), g.deployment.Name) - g.l.Infof("building %q for debug", input) - - var relInputs []string - inputInfo, errInputInfo := os.Stat(input) - if errInputInfo != nil { - return "", err - } - if inputInfo.IsDir() { - if files, err := os.ReadDir(input); err != nil { - return "", err - } else { - for _, file := range files { - if path.Ext(file.Name()) == ".go" { - relInputs = append(relInputs, strings.TrimPrefix(path.Join(input, file.Name()), goModDir+string(filepath.Separator))) - } - } - } - } else { - relInputs = append(relInputs, strings.TrimPrefix(input, goModDir+string(filepath.Separator))) - } - - _, errBuild := g.goCmd.Build(goModDir, binPath, relInputs, `-gcflags="all=-N -l"`).Env("GOOS=linux").Run() - if errBuild != nil { - return "", errBuild - } - - g.l.Infof("copying binary to pod %v", pod) - tempDest = binDest + "-build" - _, errCopyToPod := g.kubeCmd.CopyToPod(pod, container, binPath, tempDest).Run() - return tempDest, errCopyToPod -} diff --git a/grappleutils.go b/grappleutils.go index 176f14a..a320c9b 100644 --- a/grappleutils.go +++ b/grappleutils.go @@ -1,12 +1,9 @@ package gograpple import ( - "encoding/json" "errors" "fmt" "strings" - - v1 "k8s.io/api/apps/v1" ) func (g Grapple) Cleanup(pod, container string) error { @@ -19,7 +16,7 @@ func (g Grapple) Cleanup(pod, container string) error { if err := g.validateContainer(&container); err != nil { return err } - return g.dlvCleanup(g.l, pod, container) + return g.cleanupDelve(pod, container) } func (g Grapple) getPIDsOf(pod, container, name string) (pids []string, err error) { @@ -45,20 +42,3 @@ func (g *Grapple) updateDeployment() error { g.deployment = *d return nil } - -func (g Grapple) getArgsFromConfigMap(configMap, container string) ([]string, error) { - out, err := g.kubeCmd.GetConfigMapKey(configMap, defaultConfigMapDeploymentKey) - if err != nil { - return nil, err - } - var d v1.Deployment - if err := json.Unmarshal([]byte(out), &d); err != nil { - return nil, err - } - for _, c := range d.Spec.Template.Spec.Containers { - if c.Name == container { - return c.Args, nil - } - } - return nil, fmt.Errorf("no args found for container %q", container) -} diff --git a/interrupt.go b/interrupt.go new file mode 100644 index 0000000..d02746e --- /dev/null +++ b/interrupt.go @@ -0,0 +1,73 @@ +package gograpple + +import ( + "os" + "os/signal" + "time" +) + +type Interrupt struct { + signalChan chan os.Signal + exitChan chan bool + reloadChan chan bool +} + +func (g Grapple) registerInterrupt(resetDuration time.Duration) *Interrupt { + ir := &Interrupt{} + ir.signalChan = make(chan os.Signal, 1) + signal.Notify(ir.signalChan) + ir.exitChan = make(chan bool) + ir.reloadChan = make(chan bool) + exiting := false + readyToReset := false + i := 0 + go func() { + for { + select { + case <-time.After(resetDuration): + if readyToReset { + g.l.Info("resetting termination timer") + readyToReset = false + } + i = 0 + case sig := <-ir.signalChan: + switch sig { + case os.Interrupt: + g.l.Infof("received interrupt signal, trigger one more interrupt within %v to terminate", resetDuration) + readyToReset = true + if exiting { + g.l.Warn("already exiting - ignoring interupt") + continue + } + if i == 0 { + g.l.Info("triggering reload") + ir.reloadChan <- true + } else { + g.l.Info("triggering exit") + exiting = true + ir.exitChan <- true + } + i++ + } + } + } + }() + return ir +} + +func (ir *Interrupt) wait(onExit func() error, onLoad func() error) error { + // initial load + ir.reloadChan <- true + // block until an event is triggered + for { + select { + case <-ir.exitChan: + return onExit() + default: + case <-ir.reloadChan: + if err := onLoad(); err != nil { + return err + } + } + } +} diff --git a/vscode.go b/vscode.go index afac210..2a2a88d 100644 --- a/vscode.go +++ b/vscode.go @@ -26,10 +26,10 @@ type launchArgs struct { ShowLog bool `json:"showLog,omitempty"` } -func newLaunchArgs(pod, host string, port, iteration int, workspaceFolder string) *launchArgs { +func newLaunchArgs(host string, port int, workspaceFolder string) *launchArgs { return &launchArgs{ Host: host, - Name: fmt.Sprintf("delve-%v-run-%v", pod, iteration), + Name: fmt.Sprintf("delve-%v", time.Now().Unix()), Port: port, Request: "attach", Type: "go", @@ -50,8 +50,7 @@ func (la *launchArgs) toJson() (string, error) { return string(bytes), nil } -func launchVscode(l *logrus.Entry, goModDir, pod, host string, port, tries, iteration int, sleep time.Duration) error { - +func launchVSCode(l *logrus.Entry, goModDir, host string, port, tries int) error { openFile := goModDir workspaceFolder := "${workspaceFolder}" // is there a workspace in that dir @@ -75,7 +74,7 @@ func launchVscode(l *logrus.Entry, goModDir, pod, host string, port, tries, iter }).Run() l.Infof("opening debug configuration") - la, err := newLaunchArgs(pod, host, port, iteration, workspaceFolder).toJson() + la, err := newLaunchArgs(host, port, workspaceFolder).toJson() if err != nil { return err }