//Check to ensure that we have a valid version of docker before deploying
func (p *Docker) checkVersion() error {
daemonCmd := exec.Command("docker", "version", "--format", "'{{.Server.ApiVersion}}'")
daemonOut, err := utils.CheckCommandOutput(daemonCmd, true)
if err != nil {
return err
}
clientCmd := exec.Command("docker", "version", "--format", "'{{.Client.ApiVersion}}'")
clientOut, err := utils.CheckCommandOutput(clientCmd, true)
if err != nil {
return err
}
daemonString := strings.Trim(string(daemonOut), " '\n")
clientString := strings.Trim(string(clientOut), " '\n")
daemonVersion, err := strconv.ParseFloat(string(daemonString), 64)
if err != nil {
logrus.Errorf("Could not determine docker daemon version: %v\n", err)
return errors.New("Unknown docker daemon version\n")
}
clientVersion, err := strconv.ParseFloat(string(clientString), 64)
if err != nil {
logrus.Errorf("Could not determine docker client version: %v\n", err)
return errors.New("Unknown docker client version\n")
}
logrus.Debugf("Docker client is version %v and Docker daemon is version %v\n", clientVersion, daemonVersion)
if clientVersion > daemonVersion {
logrus.Errorf("Docker client is newer than daemon: please upgrade your daemon to a newer version\n")
return errors.New("Docker daemon out of date")
}
return nil
}
//Issues a command to kubectl.
//Path is the path of the kubernets file to pass to kubectl
func (p *Kubernetes) kubectlCmd(path string) error {
if p.Namespace == "" {
p.Namespace = constants.DEFAULT_NAMESPACE
}
path = utils.SanitizePath(path)
namespaceFlag := fmt.Sprintf("--namespace=%s", p.Namespace)
kubeCmd := exec.Command(p.KubeCtl, "create", "-f", path, namespaceFlag)
//In a dry run, we don't actually execute the commands, so we log and return here
if p.DryRun() {
logrus.Infof("DRY RUN: %s\n", kubeCmd.Args)
return nil
}
if _, err := utils.CheckCommandOutput(kubeCmd, false); err != nil {
return err
}
return nil
}
//deletePod removes the kubernetes pod
func (p *Kubernetes) deletePod(artifactPath string) error {
if !utils.PathExists(artifactPath) {
logrus.Errorf("No valid artifact could be found at %s", artifactPath)
return errors.New("Path does not exist")
}
namespaceFlag := fmt.Sprintf("--namespace=%s", p.Namespace)
deleteCmd := exec.Command(p.KubeCtl, "delete", "-f", artifactPath, namespaceFlag)
//In a dry run, we don't actually execute the commands, so we log and return here
if p.DryRun() {
logrus.Infof("DRY RUN: %s\n", deleteCmd.Args)
return nil
}
if _, err := utils.CheckCommandOutput(deleteCmd, false); err != nil {
return err
}
return nil
}
//Resets the replication controller with the given name
func (p *Kubernetes) resetReplica(name string) error {
if name == "" {
logrus.Errorf("No pod name provided in call to reset replication controller.")
return errors.New("No pod name provided")
}
namespaceFlag := fmt.Sprintf("--namespace=%s", p.Namespace)
resizeCmd := exec.Command(p.KubeCtl, "resize", "rc", name, "--replicas=0", namespaceFlag)
//In a dry run, we don't actually execute the commands, so we log and return here
if p.DryRun() {
logrus.Infof("DRY RUN: %s\n", resizeCmd.Args)
return nil
}
if _, err := utils.CheckCommandOutput(resizeCmd, false); err != nil {
logrus.Errorf("Error reseting kubernetes replication controller")
return err
}
return nil
}