Kubeadm: "kubeadm reset" berhenti sebentar-sebentar

LAPORAN BUG:

Saya melihat kubeadm versi 1.7 kadang-kadang hang selamanya di

[reset] Removing kubernetes-managed containers

Saya dapat mereproduksi masalah ini 4 dari 5 kali, dan harus menekan CTRL+C untuk keluar.

$ sudo kubeadm reset
sudo: unable to resolve host vhosakot-aci-1-w9c2681796d
[preflight] Running pre-flight checks
[reset] Stopping the kubelet service
[reset] Unmounting mounted directories in "/var/lib/kubelet"
[reset] Removing kubernetes-managed containers
^C  <--- Pressed CTRL+C to exit
$

Memulai ulang buruh pelabuhan dengan melakukan sudo systemctl restart docker.service menyelesaikan masalah ini dan sudo kubeadm reset berfungsi dengan baik tanpa masalah.

Akan lebih baik jika kubeadm reset memeriksa kesehatan buruh pelabuhan saat menghapus kontainer yang dikelola kubernetes dan waktu habis jika buruh pelabuhan tidak sehat, daripada menggantung selamanya di:

[reset] Removing kubernetes-managed containers

versi kubeadm :

$ kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"7", GitVersion:"v1.7.11", GitCommit:"b13f2fd682d56eab7a6a2b5a1cab1a3d2c8bdd55", GitTreeState:"clean", BuildDate:"2017-11-25T17:51:39Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}

Lingkungan :

• Versi Kubernetes :

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"7", GitVersion:"v1.7.11", GitCommit:"b13f2fd682d56eab7a6a2b5a1cab1a3d2c8bdd55", GitTreeState:"clean", BuildDate:"2017-11-25T18:34:52Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"7", GitVersion:"v1.7.12", GitCommit:"3bda299a6414b4866f179921610d6738206a18fe", GitTreeState:"clean", BuildDate:"2017-12-29T08:39:49Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}

• OS :
  VM xenial Ubuntu:

$ sudo cat /etc/os-release
sudo: unable to resolve host vhosakot-aci-1-m3710102e28
NAME="Ubuntu"
VERSION="16.04.3 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.3 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial

• Kernel :

$ uname -a
Linux vhosakot-aci-1-m3710102e28 4.4.0-104-generic #127-Ubuntu SMP Mon Dec 11 12:16:42 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

• Lainnya :

$ sudo docker info
sudo: unable to resolve host vhosakot-aci-1-w9c2681796d
Containers: 13
 Running: 9
 Paused: 0
 Stopped: 4
Images: 11
Server Version: 1.13.1
Storage Driver: aufs
 Root Dir: /var/lib/docker/aufs
 Backing Filesystem: extfs
 Dirs: 67
 Dirperm1 Supported: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins: 
 Volume: local
 Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version:  (expected: aa8187dbd3b7ad67d8e5e3a15115d3eef43a7ed1)
runc version: N/A (expected: 9df8b306d01f59d3a8029be411de015b7304dd8f)
init version: N/A (expected: 949e6facb77383876aeff8a6944dde66b3089574)
Security Options:
 apparmor
 seccomp
  Profile: default
Kernel Version: 4.4.0-104-generic
Operating System: Ubuntu 16.04.3 LTS
OSType: linux
Architecture: x86_64
CPUs: 3
Total Memory: 15.67 GiB
Name: vhosakot-aci-1-w9c2681796d
ID: X3ES:DTHR:RVNF:6OCE:2UXA:5VKA:LVVS:2G4K:KYHN:EBQZ:QH4C:SIQB
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
WARNING: No swap limit support
Experimental: false
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false

$ sudo docker version
sudo: unable to resolve host vhosakot-aci-1-w9c2681796d
Client:
 Version:      1.13.1
 API version:  1.26
 Go version:   go1.6.2
 Git commit:   092cba3
 Built:        Thu Nov  2 20:40:23 2017
 OS/Arch:      linux/amd64

Server:
 Version:      1.13.1
 API version:  1.26 (minimum version 1.12)
 Go version:   go1.6.2
 Git commit:   092cba3
 Built:        Thu Nov  2 20:40:23 2017
 OS/Arch:      linux/amd64
 Experimental: false

Apa yang terjadi?

kubeadm reset hang selamanya.

Apa yang Anda harapkan terjadi?

kubeadm reset kali habis jika buruh pelabuhan tidak sehat.

Bagaimana cara memperbanyaknya (seminimal dan setepat mungkin)?

Lihat langkah-langkah di atas.