//Determines the path of kubectl on the host
func (p *Kubernetes) findKubeCtlPath() (string, error) {
if p.DryRun() {
return "/usr/bin/kubectl", nil
}
//Insert some additional test paths to try
p.addCLIPaths(
"/usr/bin/kubectl",
"/usr/local/bin/kubectl",
)
for _, path := range p.CLIPath() {
//Add /host as a prefix if InContainer set to true
if p.InContainer {
path = filepath.Join("/host", path)
}
if utils.PathExists(path) {
logrus.Debugf("Found kubectl at %s", path)
return path, nil
}
}
logrus.Errorf("Unable to find valid kubectl installation. Tried the following locations: %v", p.CLIPath())
return "", errors.New("No kubectl installation found")
}
//Removes the .workdir directory once the graph has been deployed.
func (b *Base) cleanWorkDirectory() {
workDirectory := filepath.Join(b.Target(), constants.WORKDIR)
if utils.PathExists(workDirectory) {
logrus.Debugf("Cleaning up work directory at %s\n", workDirectory)
os.RemoveAll(workDirectory)
}
}
//Verify that valid artifacts exist for the specified provider
//The specified provider must be a member of the given component
func (b *Base) checkProviderArtifact(c Component, provider string, checkedProviders *[]string) {
logrus.Debugf("Provider : %v", provider)
//If the provider has already been checked, skip it
if providerAlreadyChecked(checkedProviders, provider) {
return
}
if artifacts, ok := c.Artifacts[provider]; ok {
//Iterate through each individual artifact entry for each provider
for _, artifactEntry := range artifacts {
//If the entry has a path field, check it for validity
if artifactEntry.Path != "" {
fullPath := filepath.Join(b.Target(), utils.SanitizePath(artifactEntry.Path))
if utils.PathExists(fullPath) && utils.PathIsFile(fullPath) {
logrus.Infof("Artifact %s: OK.", fullPath)
} else {
logrus.Errorf("Artifact %s: MISSING.", fullPath)
}
}
//For this artifact to be 'fully checked',
//we need to verify that the inherited providers (if any) are valid as well
b.checkInheritence(c, provider, artifactEntry.Repo.Inherit, checkedProviders)
}
*checkedProviders = append(*checkedProviders, provider)
}
}
func (b *Base) setAnswersDir(AnswersDirectory string) error {
if !utils.PathExists(AnswersDirectory) {
if AnswersDirectory != "" {
logrus.Warnf("Invalid answers directory provided: '%s'. Using '%s' instead", AnswersDirectory, b.Target())
}
b.AnswersDirectory = b.Target()
return errors.New("Using target path as answers directory")
}
b.AnswersDirectory = AnswersDirectory
return nil
}
//Returns an *os.File pointing to the answers file. If one does not exist, it is created and returned.
func (b *Base) createAnswersFile(sampleAnswersPath string) (*os.File, error) {
if utils.PathExists(sampleAnswersPath) {
return os.OpenFile(sampleAnswersPath, os.O_APPEND|os.O_WRONLY, 0600)
}
sampleAnswersFile, err := os.Create(sampleAnswersPath)
if err != nil {
logrus.Fatalf("Unable to create sample answers file: %s", err)
return nil, err
}
return sampleAnswersFile, nil
}
//Unmarshals the answers from the answers.conf file into the base method
func (b *Base) LoadAnswers() error {
//if a directory was provided...
fp := b.AnswersDir()
if utils.PathIsDirectory(fp) {
//Construct the full path by combining with the ANSWERS_FILE constant
fp = filepath.Join(fp, constants.ANSWERS_FILE)
if !utils.PathExists(fp) {
return errors.New("Failed to read answers from path")
}
}
//..try to parse the file
if !utils.PathExists(fp) {
return errors.New("Bad answers filepath")
}
p := parser.NewParser(fp)
err := p.Unmarshal(&b.AnswersData)
if err != nil {
return errors.New("Failed to parse file")
}
return nil
}
//Generates a new work directory and return the path to it
func makeWorkDirectory(targetPath string) (string, error) {
workdir := filepath.Join(targetPath, constants.WORKDIR)
//If the .workdir directory does not exist in targetPath, make it.
if !utils.PathExists(workdir) {
logrus.Debugf("Making workdir in %s", targetPath)
err := os.MkdirAll(workdir, 0700)
if err != nil {
logrus.Fatalf("Failed to make work directory in %s", targetPath)
return "", errors.New("Failed to make work directory")
}
}
return workdir, nil
}
func (b *Base) setTargetPath(target string) error {
//If no target is specified or if the user specifies a '.',
//then use the current working directory
if target == "" || !utils.PathExists(target) {
cwd, err := os.Getwd()
if err != nil {
logrus.Fatalf("Failed to get working directory")
return errors.New("Failed to set target path")
}
b.TargetPath = cwd
return nil
}
b.TargetPath = target
return nil
}
//Parses a markup file into the given interface object
func (p *Parser) Unmarshal(result interface{}) error {
if !utils.PathExists(p.markupFile) {
return errors.New("File does not exist")
}
f, err := ioutil.ReadFile(p.markupFile)
if err != nil {
return err
}
if isJSON(f) {
return json.Unmarshal(f, result)
}
return yaml.Unmarshal(f, result)
}
//Read the Nulecule file and fill the MainfileData field
func (b *Base) ReadMainFile() error {
//Check for valid path
targetFile := filepath.Join(b.Target(), constants.MAIN_FILE)
if !utils.PathExists(targetFile) {
logrus.Fatalf("Could not find %s file in %s", constants.MAIN_FILE, b.Target())
return errors.New("File does not exist")
}
//Attempt to parse
p := parser.NewParser(targetFile)
err := p.Unmarshal(b.MainfileData)
if err != nil {
logrus.Errorf("Error parsing Nulecule file: %v", err)
return err
}
return nil
}
func (p *Docker) Deploy() error {
//Iterate through artifact entries for the docker provider
for _, artifact := range p.Artifacts() {
//Form the absolute path of the artifact
base := filepath.Base(artifact)
fullPath := filepath.Join(p.WorkDirectory(), base)
if !utils.PathExists(fullPath) {
logrus.Errorf("No such docker artifact: %v\n", fullPath)
return errors.New("No such docker artifact path")
}
err := p.dockerCmd(fullPath)
if err != nil {
return err
}
}
return nil
}
//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
}
//Returns a nil error if no nulecule app exists in the target directory.
//If a nulecule app does exist in the target directory, it checks if it has a matching app ID and
//if it does, allows the installation process to continue. If a different nulecule app has been found,
//it warns the user that they are overwriting an existing app and returns an error status
func checkInstallOverwrite(tmpTarget, dstTarget string) error {
if !utils.PathExists(filepath.Join(dstTarget, constants.MAIN_FILE)) {
logrus.Debugf("No existing app found in target directory, installation can continue")
return nil
}
//Parse the nulecule file in the target directory
targetBase := New(dstTarget, "", true)
targetBase.ReadMainFile()
targetID := targetBase.MainfileData.ID
//Parse the nulecule file in the tmp directory
tmpBase := New(tmpTarget, "", true)
tmpBase.ReadMainFile()
tmpID := tmpBase.MainfileData.ID
if targetID != tmpID {
logrus.Fatalf("You are trying to overwrite existing app %s with app %s - clear or change current directory.", targetID, tmpID)
return errors.New("Conflicting app install path")
}
return nil
}