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Roy

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Joined on May 16, 2020

Roy

Sep 28

Answer: Kubernetes Pod stuck in CrashLoopBackOff

#kubernetes

1 min read

show http proxy used by ansible

you cannot use - name: show http_proxy ...

Sep 17 '20

Roy

Sep 24

docker 重启失败

#docker

1 min read

Roy

Sep 23

/etc/security/limits.

#linux

1 min read

Roy

Sep 10

bash 函数 return 1 是表示执行失败

#shell

1 min read

Roy

Sep 10

quote in ssh bash -c

#linux #ssh #troubleshoooting

1 min read

Roy

Sep 9

Why do the md5 hashes of two tarballs of the same file differ?

#linux

1 min read

Roy

Sep 8

kubectl -ojsonpath

#k8s

1 min read

Roy

Sep 3

解决 Kubernetes 中 Kubelet 组件报 failed to get cgroup 错误

#k8s

1 min read

Roy

Sep 3

Answer: how to run kubelet as docker container

#k8s #container

1 min read

Roy

Sep 2

the associated storage asset still exists when the pv is deleted

#k8s

1 min read

Roy

Sep 1

Galera Cluster Recovery

#mariadb #galera

1 min read

Roy

Aug 30

Answer: How to see docker image contents

#docker

1 min read

Roy

Aug 28

windows hosts file do not support inline comments

#windows #troubleshooting

1 min read

Roy

Aug 24

Answer: What is the difference between the random.choices() and random.sample() functions?

#python

1 min read

Roy

Aug 24

Answer: Set specific DNS server using dns.resolver (pythondns)

#python #dns

1 min read

Roy

Aug 24

Answer: How to copy Docker images from one host to another without using a repository

#docker

1 min read

Roy

Aug 18

I was misguided by the network policy of the office when I try to determine whether the target port of target server is open

#troubleshooting

1 min read

Roy

Aug 17

Answer: Grep in MySQL CLI interpretter

1 min read

Roy

Aug 5

add worker label to worker node in k8s

#k8s

1 min read

Roy

Aug 5

忘了添加允许外网访问的 firewall rule 导致的问题

#troubleshoooting

1 min read

Roy

Aug 3

beawre the place where you put ssh include directive after

#ssh #troubleshooting

1 min read

Roy

Jul 23

ansible lineinfile 中 regexp 如果匹配多行，只会修改其中一行

#ansible

1 min read

Roy

Jul 22

ssh login to the wrong machine

#ssh #troubleshooting

1 min read

Roy

Jul 13

ansible create empty file if it does not exist

#ansible

1 min read

Roy

Jul 13

auto start cron in wsl2

#wsl2

1 min read

Roy

Jul 12

the value of ansible_hostname is not fixed after the fact gathering

#ansible

1 min read

Roy

Jul 6

ansible cannot connection after change ip of target

#ansible

1 min read

Roy

Jul 2

ansible only use one configuration file, not combine all the configuration files

#ansible

1 min read

Roy

Jun 11

ssh configuration in windows

#ssh #windows

1 min read

Roy

Jun 7

Answer: docker find container by pid of inside process

#docker

1 min read

Roy

May 27

rsync continue a broken scp command

#linux #command #rsync

1 min read

Roy

May 24

recover from a interrupted yum upgrade

#ops #linux #yum #redhat

1 min read

Roy

May 21

hyper -v 导致 windows 10 分辨率降级

#troubleshooting #wsl2

1 min read

Roy

May 21

run ping command as normal user in wsl2

#wsl2

1 min read

Roy

Apr 27

disable CoW on vm images

#btrfs

1 min read

Roy

Apr 27

笔记本进启动菜单难

1 min read

Roy

Apr 26

从国内访问返回503错误

#gfw

1 min read

Roy

Apr 21

错误地配置了 gcp 的防火墙规则

1 min read

Roy

Feb 7

shell Process substitution and pipe

#shell

1 min read

Roy

Dec 8 '20

relational expression and /regular expression/ in awk

1 min read

Roy

Dec 8 '20

cmd1 && cmd2 || cmd3 is not the same as if cmd1; then cmd2; else cmd3;fi

#bash

1 min read

Roy

Nov 17 '20

difference between rm and unlink

#command

1 min read

Roy

Nov 12 '20

Answer: Ansible fileglob: unable to find … in expected paths

#ansible

1 min read

Roy

Oct 10 '20

Prevent harmful Linux updates with versionlock

1 min read

Roy

Sep 29 '20

Answer: Run only one task and handler from ansible playbook

#ansible

1 min read

Roy

Sep 26 '20

Ctrl-v I # cannot comment out multiple lines

#vim #troubleshooting

1 min read

Roy

Sep 26 '20

failed to switch container runtime to containerd

#k8s

1 min read

Roy

Sep 25 '20

apt cacher for faster downloading rpm/deb pkgs

#debian

1 min read

Roy

Sep 25 '20

a wrong indent in yaml make comment invalid

#ansible

1 min read

Roy

Sep 24 '20

nodename and hostname in ansible

#ansible

1 min read

Roy

Sep 24 '20

small error related to quote and indent in ansible playbook loop

#ansible

1 min read

Roy

Sep 23 '20

yum --disableexclude

1 min read

Roy

Sep 23 '20

ssh can not resolve hostname in included config file

#ssh

1 min read

Roy

Sep 23 '20

fix problems after rename vagrant project

#vagrant

1 min read

Roy

Sep 23 '20

open search result in new tab

1 min read

Roy

Sep 21 '20

vagrant cannot create a custom named network for virtualbox

#vagrant #virtualbox

1 min read

Roy

Sep 21 '20

docker: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers).

#docker #k8s

1 min read

Roy

Sep 21 '20

Ansible: Further plays are not executing if task in one play failed when multiple plays in a playbook

#ansible

1 min read

Roy

Sep 21 '20

vagrant will not run an ansible play if the vm do not match the hosts line in the play

#vagrant #ansible

1 min read

Roy

Sep 21 '20

specify image-repository fo kubeadm

1 min read

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