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The Compost | 02.25.2019 Rise of the Zombie Deer
The Compost is a newsletter breaking down the week’s stories on environmental issues. Find out what’s going on, why you should care, and how you can help.
zombie  deer 
1 hour ago by xer0x
قناصة الاوم تسهل عليك الكونكور – ببجي موبايل قيم جلد ضد أعلى تصنيف في اللعبة ! – PUBG MOBILE
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<p>قناصة الاوم تسهل عليك الكونكور – ببجي موبايل قيم جلد ضد أعلى تصنيف في اللعبة ! – PUBG MOBILE دعم القناة لتطويرها ومساعدتي في الاستمرار https://streamlabs.com/gamesleaders1 – تريد تعرض رسالتك الخاصة ودعم القناة في… pubg mobile,pubg ps4,pubg zombie mode,pubg mobile tips tricks 2019,pubg mobile tips tricks hindi hack,pubg mobile season 6,pubg,ابو اياد,ببجي موبايل,aeod 1407,pubg mobile […]</p>
<p>The post <a rel="nofollow" href="https://www.snapeplus.com/%d9%82%d9%86%d8%a7%d8%b5%d8%a9-%d8%a7%d9%84%d8%a7%d9%88%d9%85-%d8%aa%d8%b3%d9%87%d9%84-%d8%b9%d9%84%d9%8a%d9%83-%d8%a7%d9%84%d9%83%d9%88%d9%86%d9%83%d9%88%d8%b1-%d8%a8%d8%a8%d8%ac%d9%8a-%d9%85/">قناصة الاوم تسهل عليك الكونكور – ببجي موبايل قيم جلد ضد أعلى تصنيف في اللعبة ! – PUBG MOBILE</a> appeared first on <a rel="nofollow" href="https://www.snapeplus.com">سناب بلس</a>.</p><img src="http://feeds.feedburner.com/~r/snapeplus/~4/RkhafsJB2X8" height="1" width="1" alt=""/>
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11 days ago by snapeplus
Docker and the PID 1 zombie reaping problem
Let's look at a concrete example. Suppose that your container contains a web server that runs a CGI script that's written in bash. The CGI script calls grep. Then the web server decides that the CGI script is taking too long and kills the script, but grep is not affected and keeps running. When grep finishes, it becomes a zombie and is adopted by the PID 1 (the web server). The web server doesn't know about grep, so it doesn't reap it, and the grep zombie stays in the system.

Every time a process exits even though it has child processes, it's expecting the init process to perform the cleanup later on.

So how does this relate to Docker? Well, we see that a lot of people run only one process in their container, and they think that when they run this single process, they're done. But most likely, this process is not written to behave like a proper init process. That is, instead of properly reaping adopted processes, it's probably expecting another init process to do that job, and rightly so.


When building Docker containers, you should be aware of the PID 1 zombie reaping problem. That problem can cause unexpected and obscure-looking issues when you least expect it. This article explains the PID 1 problem, explains how you can solve it, and presents a pre-built solution that you can use: Baseimage-docker.

Consider Nginx as an example, which daemonizes into the background by default. This works as follows. First, Nginx creates a child process. Second, the original Nginx process exits. Third, the Nginx child process is adopted by the init process.

Orphaned process adoption

You may see where I am going. The operating system kernel automatically handles adoption, so this means that the kernel expects the init process to have a special responsibility: the operating system expects the init process to reap adopted children too.

This is a very important responsibility in Unix systems. It is such a fundamental responsibility that many many pieces of software are written to make use of this. Pretty much all daemon software expect that daemonized child processes are adopted and reaped by init.
docker  gotcha  pid  devops  unix  linux  daemon  init  zombie  reaping 
17 days ago by hellsten
Don’t Fear the Subreaper – William Martin – Medium
This post is about Linux subreapers, why they exist, what their behaviour is, and how you can use them, via a practical example in Go. If you are comfortable with how the process table and process…
unix  process  hierarchy  zombie  adoption 
november 2018 by gilberto5757
Twitter
RT : Throwback to my viz last year, which I had a blast making! Wish I'd had time to map the 'Eu…
zombie  HappyHalloween  from twitter_favs
october 2018 by pbeshai
Twitter
Finally saw "Train to Busan" (2016) last night; such a strong, character-driven film that takes place almos…
zombie  from twitter_favs
october 2018 by moresby
302 Found
If you’re reading this, it’s because you’re probably looking at your phone, mindlessly scrolling while on the bus or train, or toilet ;) No? Maybe you’re at your desktop at work, pretending to do something you’re being paid to do, but instead you’re secretly here with me. via Pocket
pocket  mobile  social  zombie 
october 2018 by jburkunk
Dead City - Topaz Comics
In a city devastated by zombies, two survivors meet up with each other and try to survive.
webcomic  zombie 
october 2018 by jcfiala

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