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clean.go
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clean.go
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// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2018 Datadog, Inc.
package setup
import (
"os"
"os/exec"
"path"
"strings"
"syscall"
"fmt"
"github.com/DataDog/pupernetes/pkg/config"
"github.com/golang/glog"
)
func remove(path string) error {
_, err := os.Stat(path)
if err != nil && os.IsNotExist(err) {
glog.V(4).Infof("Not existing path: %s", path)
return nil
}
glog.V(4).Infof("Removing %s ...", path)
err = os.RemoveAll(path)
if err != nil {
glog.Errorf("Unexpected error during cleanup of %s: %v", path, err)
return err
}
glog.Infof("Removed %s", path)
return nil
}
func (e *Environment) cleanMounts() error {
b, err := exec.Command("mount").CombinedOutput()
output := string(b)
if err != nil {
glog.Errorf("Cannot get mount list: %v, %s", err, output)
return err
}
for _, line := range strings.Split(output, "\n") {
fields := strings.Fields(line)
if len(fields) < 3 {
continue
}
mountPath := fields[2]
if !strings.HasPrefix(mountPath, e.kubeletRootDir) {
continue
}
glog.V(4).Infof("Removing mount %s", mountPath)
err := syscall.Unmount(mountPath, 0)
if err != nil {
glog.Errorf("Cannot umount %s: %v", mountPath, err)
continue
}
glog.Infof("Removed mount %s", mountPath)
}
return nil
}
func (e *Environment) Clean() error {
var toRemove []string
if e.cleanOptions.None {
glog.V(4).Infof("Cleanup skipped")
return nil
}
_, err := os.Stat(e.GetHyperkubePath())
if e.cleanOptions.Kubectl && err != nil {
glog.Warningf("Cannot use kubectl: %v", err)
}
if e.cleanOptions.Kubectl && err == nil {
for _, elt := range [][]string{
{"delete-context", defaultKubectlContextName},
{"delete-cluster", defaultKubectlClusterName},
{"unset", "current-context"},
} {
b, err := exec.Command(e.GetHyperkubePath(),
"kubectl",
"config",
elt[0],
elt[1],
).CombinedOutput()
output := string(b)
if err != nil && !strings.Contains(output, ", not in ") {
glog.Errorf("Cannot exec kubectl: %s", output)
}
}
}
if e.cleanOptions.Iptables && err == nil {
// this command can fail, it's a non issue
b, err := exec.Command(e.GetHyperkubePath(), "proxy", "--cleanup").CombinedOutput()
glog.V(5).Infof("Iptables clean: %s, %v", string(b), err)
}
if e.cleanOptions.Etcd {
toRemove = append(toRemove, e.etcdDataABSPath)
}
if e.cleanOptions.Manifests {
toRemove = append(toRemove, e.manifestTemplatesABSPath, e.manifestStaticPodABSPath, e.manifestAPIABSPath, e.manifestConfigABSPath)
}
if e.cleanOptions.Binaries {
toRemove = append(toRemove, e.binABSPath)
}
if e.cleanOptions.Secrets {
toRemove = append(toRemove, e.secretsABSPath)
}
if e.cleanOptions.Network {
toRemove = append(toRemove, e.networkABSPath)
}
if e.cleanOptions.Systemd {
toRemove = append(toRemove, path.Join(UnitPath, fmt.Sprintf("%setcd.service", config.ViperConfig.GetString("systemd-unit-prefix"))))
toRemove = append(toRemove, path.Join(UnitPath, fmt.Sprintf("%skubelet.service", config.ViperConfig.GetString("systemd-unit-prefix"))))
}
if e.cleanOptions.All {
toRemove = append(toRemove, e.rootABSPath)
}
if e.cleanOptions.Mounts {
e.cleanMounts()
}
if e.cleanOptions.Kubelet {
// don't do it twice
if !e.cleanOptions.Mounts {
e.cleanMounts()
}
toRemove = append(toRemove, e.kubeletRootDir)
}
for _, dir := range toRemove {
err := remove(dir)
if err != nil {
if dir == e.kubeletRootDir && strings.Contains(err.Error(), "device or resource busy") {
glog.Warningf("Mounts still present in %s ?", e.kubeletRootDir)
continue
}
return err
}
}
glog.Infof("Cleanup successfully finished")
return nil
}