package main import ( "fmt" "os" "os/exec" "strings" "github.com/edwarnicke/exechelper" ) type Volume struct { hostDir string containerDir string isDefaultWorkDir bool } type Container struct { suite *HstSuite isOptional bool name string image string extraRunningArgs string volumes map[string]Volume envVars map[string]string vppInstance *VppInstance } func NewContainer(yamlInput ContainerConfig) (*Container, error) { containerName := yamlInput["name"].(string) if len(containerName) == 0 { err := fmt.Errorf("container name must not be blank") return nil, err } var container = new(Container) container.volumes = make(map[string]Volume) container.envVars = make(map[string]string) container.name = containerName if image, ok := yamlInput["image"]; ok { container.image = image.(string) } else { container.image = "hs-test/vpp" } if args, ok := yamlInput["extra-args"]; ok { container.extraRunningArgs = args.(string) } else { container.extraRunningArgs = "" } if isOptional, ok := yamlInput["is-optional"]; ok { container.isOptional = isOptional.(bool) } else { container.isOptional = false } if _, ok := yamlInput["volumes"]; ok { r := strings.NewReplacer("$HST_DIR", workDir) for _, volu := range yamlInput["volumes"].([]interface{}) { volumeMap := volu.(ContainerConfig) hostDir := r.Replace(volumeMap["host-dir"].(string)) containerDir := volumeMap["container-dir"].(string) isDefaultWorkDir := false if isDefault, ok := volumeMap["is-default-work-dir"]; ok { isDefaultWorkDir = isDefault.(bool) } container.addVolume(hostDir, containerDir, isDefaultWorkDir) } } if _, ok := yamlInput["vars"]; ok { for _, envVar := range yamlInput["vars"].([]interface{}) { envVarMap := envVar.(ContainerConfig) name := envVarMap["name"].(string) value := envVarMap["value"].(string) container.addEnvVar(name, value) } } return container, nil } func (c *Container) getWorkDirVolume() (res Volume, exists bool) { for _, v := range c.volumes { if v.isDefaultWorkDir { res = v exists = true return } } return } func (c *Container) GetHostWorkDir() (res string) { if v, ok := c.getWorkDirVolume(); ok { res = v.hostDir } return } func (c *Container) GetContainerWorkDir() (res string) { if v, ok := c.getWorkDirVolume(); ok { res = v.containerDir } return } func (c *Container) getRunCommand() string { syncPath := fmt.Sprintf(" -v %s:/tmp/sync", c.getSyncPath()) cmd := "docker run --cap-add=all -d --privileged --network host --rm" cmd += syncPath cmd += c.getVolumesAsCliOption() cmd += c.getEnvVarsAsCliOption() cmd += " --name " + c.name + " " + c.image + " " + c.extraRunningArgs return cmd } func (c *Container) run() error { if c.name == "" { return fmt.Errorf("run container failed: name is blank") } exechelper.Run(fmt.Sprintf("mkdir -p /tmp/%s/sync", c.name)) cmd := c.getRunCommand() err := exechelper.Run(cmd) if err != nil { return fmt.Errorf("container run failed: %s", err) } return nil } func (c *Container) addVolume(hostDir string, containerDir string, isDefaultWorkDir bool) { var volume Volume volume.hostDir = hostDir volume.containerDir = containerDir volume.isDefaultWorkDir = isDefaultWorkDir c.volumes[hostDir] = volume } func (c *Container) getVolumeByHostDir(hostDir string) Volume { return c.volumes[hostDir] } func (c *Container) getVolumesAsCliOption() string { cliOption := "" if len(c.volumes) > 0 { for _, volume := range c.volumes { cliOption += fmt.Sprintf(" -v %s:%s", volume.hostDir, volume.containerDir) } } return cliOption } func (c *Container) getWorkDirAsCliOption() string { if _, ok := c.getWorkDirVolume(); ok { return fmt.Sprintf(" --workdir=\"%s\"", c.GetContainerWorkDir()) } return "" } func (c *Container) addEnvVar(name string, value string) { c.envVars[name] = value } func (c *Container) getEnvVarsAsCliOption() string { cliOption := "" if len(c.envVars) == 0 { return cliOption } for name, value := range c.envVars { cliOption += fmt.Sprintf(" -e %s=%s", name, value) } return cliOption } func (c *Container) getSyncPath() string { return fmt.Sprintf("/tmp/%s/sync", c.name) } func (c *Container) newVppInstance(additionalConfig ...Stanza) (*VppInstance, error) { vppConfig := new(VppConfig) vppConfig.CliSocketFilePath = defaultCliSocketFilePath if len(additionalConfig) > 0 { vppConfig.additionalConfig = additionalConfig[0] } vpp := new(VppInstance) vpp.container = c vpp.config = vppConfig c.vppInstance = vpp return vpp, nil } func (c *Container) copy(sourceFileName string, targetFileName string) error { cmd := exec.Command("docker", "cp", sourceFileName, c.name+":"+targetFileName) return cmd.Run() } func (c *Container) createFile(destFileName string, content string) error { f, err := os.CreateTemp("/tmp", "hst-config") if err != nil { return err } defer os.Remove(f.Name()) if _, err := f.Write([]byte(content)); err != nil { return err } if err := f.Close(); err != nil { return err } c.copy(f.Name(), destFileName) return nil } /* * Executes in detached mode so that the started application can continue to run * without blocking execution of test */ func (c *Container) execServer(command string) error { return exechelper.Run("docker exec -d" + c.getEnvVarsAsCliOption() + " " + c.name + " " + command) } func (c *Container) exec(command string) (string, error) { cliCommand := "docker exec" + c.getEnvVarsAsCliOption() + " " + c.name + " " + command byteOutput, err := exechelper.CombinedOutput(cliCommand) return string(byteOutput), err } func (c *Container) execAction(args string) (string, error) { syncFile := c.getSyncPath() + "/rc" os.Remove(syncFile) workDir := c.getWorkDirAsCliOption() cmd := fmt.Sprintf("docker exec -d %s %s hs-test %s", workDir, c.name, args) err := exechelper.Run(cmd) if err != nil { return "", err } res, err := waitForSyncFile(syncFile) if err != nil { return "", fmt.Errorf("failed to read sync file while executing 'hs-test %s': %v", args, err) } o := res.StdOutput + res.ErrOutput if res.Code != 0 { return o, fmt.Errorf("cmd resulted in non-zero value %d: %s", res.Code, res.Desc) } return o, err } func (c *Container) stop() error { if c.vppInstance != nil && c.vppInstance.apiChannel != nil { c.vppInstance.disconnect() } c.vppInstance = nil return exechelper.Run("docker stop " + c.name + " -t 0") }