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kubeadm: reuse found crictl path for exec

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We now re-use the crictl tool path within the `ContainerRuntime` when
exec'ing into it. This allows introducing a convenience function to
create the crictl command and re-use it where necessary.

Signed-off-by: Sascha Grunert <sgrunert@redhat.com>
This commit is contained in:
Sascha Grunert 2022-03-22 14:00:38 +01:00
parent 0b8a665d50
commit 6b63231b7e
No known key found for this signature in database
GPG Key ID: 09D97D153EF94D93
1 changed files with 18 additions and 12 deletions
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30
cmd/kubeadm/app/util/runtime/runtime.go
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@ -46,18 +46,19 @@ type ContainerRuntime interface {
// CRIRuntime is a struct that interfaces with the CRI
type CRIRuntime struct {
exec utilsexec.Interface
criSocket string
exec utilsexec.Interface
criSocket string
crictlPath string
}
// NewContainerRuntime sets up and returns a ContainerRuntime struct
func NewContainerRuntime(execer utilsexec.Interface, criSocket string) (ContainerRuntime, error) {
toolName := "crictl"
runtime := &CRIRuntime{execer, criSocket}
if _, err := execer.LookPath(toolName); err != nil {
const toolName = "crictl"
crictlPath, err := execer.LookPath(toolName)
if err != nil {
return nil, errors.Wrapf(err, "%s is required by the container runtime", toolName)
}
return runtime, nil
return &CRIRuntime{execer, criSocket, crictlPath}, nil
}
// Socket returns the CRI socket endpoint
@ -65,9 +66,14 @@ func (runtime *CRIRuntime) Socket() string {
return runtime.criSocket
}
// crictl creates a crictl command for the provided args.
func (runtime *CRIRuntime) crictl(args ...string) utilsexec.Cmd {
return runtime.exec.Command(runtime.crictlPath, append([]string{"-r", runtime.Socket()}, args...)...)
}
// IsRunning checks if runtime is running
func (runtime *CRIRuntime) IsRunning() error {
if out, err := runtime.exec.Command("crictl", "-r", runtime.criSocket, "info").CombinedOutput(); err != nil {
if out, err := runtime.crictl("info").CombinedOutput(); err != nil {
return errors.Wrapf(err, "container runtime is not running: output: %s, error", string(out))
}
return nil
@ -75,7 +81,7 @@ func (runtime *CRIRuntime) IsRunning() error {
// ListKubeContainers lists running k8s CRI pods
func (runtime *CRIRuntime) ListKubeContainers() ([]string, error) {
out, err := runtime.exec.Command("crictl", "-r", runtime.criSocket, "pods", "-q").CombinedOutput()
out, err := runtime.crictl("pods", "-q").CombinedOutput()
if err != nil {
return nil, errors.Wrapf(err, "output: %s, error", string(out))
}
@ -88,12 +94,12 @@ func (runtime *CRIRuntime) ListKubeContainers() ([]string, error) {
func (runtime *CRIRuntime) RemoveContainers(containers []string) error {
errs := []error{}
for _, container := range containers {
out, err := runtime.exec.Command("crictl", "-r", runtime.criSocket, "stopp", container).CombinedOutput()
out, err := runtime.crictl("stopp", container).CombinedOutput()
if err != nil {
// don't stop on errors, try to remove as many containers as possible
errs = append(errs, errors.Wrapf(err, "failed to stop running pod %s: output: %s, error", container, string(out)))
} else {
out, err = runtime.exec.Command("crictl", "-r", runtime.criSocket, "rmp", container).CombinedOutput()
out, err = runtime.crictl("rmp", container).CombinedOutput()
if err != nil {
errs = append(errs, errors.Wrapf(err, "failed to remove running container %s: output: %s, error", container, string(out)))
}
@ -107,7 +113,7 @@ func (runtime *CRIRuntime) PullImage(image string) error {
var err error
var out []byte
for i := 0; i < constants.PullImageRetry; i++ {
out, err = runtime.exec.Command("crictl", "-r", runtime.criSocket, "pull", image).CombinedOutput()
out, err = runtime.crictl("pull", image).CombinedOutput()
if err == nil {
return nil
}
@ -117,7 +123,7 @@ func (runtime *CRIRuntime) PullImage(image string) error {
// ImageExists checks to see if the image exists on the system
func (runtime *CRIRuntime) ImageExists(image string) (bool, error) {
err := runtime.exec.Command("crictl", "-r", runtime.criSocket, "inspecti", image).Run()
err := runtime.crictl("inspecti", image).Run()
return err == nil, nil
}