screen command doesn't work in a container

Question

I'm playing with Docker lately and I decided to start a little fun project so I have this Dockerfile :

# Base Image
FROM debian:buster

# Making steam directory
RUN mkdir /home/cs &&\
    mkdir /home/Resources &&\
    mkdir /home/Resources/steamcmd &&\
    mkdir /home/Resources/rehlds &&\
    mkdir /home/Resources/metamod &&\
    mkdir /home/Resources/amxmodx &&\
    mkdir /home/Resources/reunion &&\
    mkdir /home/Resources/rechecker &&\
    mkdir /home/Resources/reaimdetector &&\
    mkdir /home/Resources/cstrikefix &&\
    mkdir /home/Resources/regamedll &&\
    mkdir /home/Resources/reapi &&\
    mkdir /root/.steam &&\
    mkdir /root/.steam/sdk32 &&\
# Installing required packages
    dpkg --add-architecture i386 &&\
    apt-get update -y &&\
    apt-get install -y libsdl2-2.0-0 libsdl2-2.0-0:i386 lib32gcc1 curl tmux screen xz-utils unzip unrar-free nano &&\
# Installing the server
    cd /home/Resources/steamcmd &&\
    curl -sqL "https://steamcdn-a.akamaihd.net/client/installer/steamcmd_linux.tar.gz" | tar zxvf - &&\
    until ./steamcmd.sh +login anonymous +force_install_dir /home/cs +app_update 90 -beta beta validate +quit; do sleep 1; done &&\
# Fix steamclient.so issue
    cp /home/cs/steamclient.so /root/.steam/sdk32/ &&\
# reHLDS patch
    cd /home/Resources/rehlds &&\
    curl -sqL "http://nexus.rehlds.org/nexus/content/repositories/rehlds-dev/rehlds/rehlds/3.7.0.693-dev/rehlds-3.7.0.693-dev.zip" >> rehlds-3.7.0.693-dev.zip &&\
    unzip rehlds-3.7.0.693-dev.zip &&\
    cp -r bin/linux32/* /home/cs/ &&\
# Metamod
    cd /home/Resources/metamod &&\
    curl -sqL "http://teamcity.rehlds.org/guestAuth/downloadArtifacts.html?buildTypeId=Metamod_Publish&buildId=lastSuccessful" >> Metamod_publish_1.3.0.128_artifacts.zip &&\
    unzip -q Metamod_publish_1.3.0.128_artifacts.zip &&\
    unzip -q metamod_1.3.0.128.zip &&\
    cp -r addons /home/cs/cstrike &&\
    sed -i 's+gamedll_linux "dlls/cs.so"+gamedll_linux "addons/metamod/metamod_i386.so"+g' /home/cs/cstrike/liblist.gam &&\
# AmxModX
    cd /home/Resources/amxmodx &&\
    curl -sqL "https://www.amxmodx.org/release/amxmodx-1.8.2-base-linux.tar.gz" | tar zxvf - &&\
    curl -sqL "https://www.amxmodx.org/release/amxmodx-1.8.2-cstrike-linux.tar.gz" | tar zxvf - &&\
    cp -r addons /home/cs/cstrike/ &&\
    echo "linux addons/amxmodx/dlls/amxmodx_mm_i386.so" >> /home/cs/cstrike/addons/metamod/plugins.ini &&\
# Reunion
    cd /home/Resources/reunion &&\
    curl -sqL "http://repository.btstelecom.ro/resources/reunion_0.1.92.zip" >> reunion_0.1.92.zip &&\
    unzip reunion_0.1.92.zip &&\
    mkdir /home/cs/cstrike/addons/reunion &&\
    mkdir /home/cs/cstrike/addons/reunion/dlls &&\
    cp bin/Linux/reunion_mm_i386.so /home/cs/cstrike/addons/reunion/dlls/ &&\
    cp reunion.cfg /home/cs/cstrike/ &&\
    echo "linux addons/reunion/dlls/reunion_mm_i386.so" >> /home/cs/cstrike/addons/metamod/plugins.ini &&\
# ReChecker
    cd /home/Resources/rechecker &&\
    curl -sqL "https://amxx-bg.info/download/file.php?id=1444&sid=1811ca41ee4e4a17ea7110eecd7954a6" >> rechecker_2_5.zip &&\
    unzip -q rechecker_2_5.zip &&\
    mkdir /home/cs/cstrike/addons/rechecker &&\
    mkdir /home/cs/cstrike/addons/rechecker/dlls &&\
    cp bin/addons/rechecker/rechecker_mm_i386.so /home/cs/cstrike/addons/rechecker/dlls/ &&\
    cp bin/addons/rechecker/resources.ini /home/cs/cstrike/addons/rechecker/dlls/ &&\
    echo "linux addons/rechecker/dlls/rechecker_mm_i386.so" >> /home/cs/cstrike/addons/metamod/plugins.ini &&\
# cstrike fix
    cd /home/Resources/cstrikefix &&\
    mkdir /home/cs/cstrike/addons/cstrike &&\
    mkdir /home/cs/cstrike/addons/cstrike/dlls &&\
    curl --header "Host: c-s.net.ua" --header "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.183 Safari/537.36" --header "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9" --header "Accept-Language: ro-RO,ro;q=0.9,en;q=0.8" --header "Referer: https://c-s.net.ua/forum/topic81470.html" --header "Cookie: _ga=GA1.3.1603347949.1602960053; __gads=ID=f426b07af5c143a1-22526794ffb800af:T=1603190043:RT=1603190043:S=ALNI_MaFPky-pOiwPIbZanyNiU0Ksdqm0Q; session_id=9fb1924d44b7d5b77af02e9680400c4f; topicsread=a%3A4%3A%7Bi%3A17628%3Bi%3A1603190043%3Bi%3A84615%3Bi%3A1604348502%3Bi%3A81470%3Bi%3A1604348492%3Bi%3A74614%3Bi%3A1603821602%3B%7D; _gid=GA1.3.999712779.1604595471" --header "Connection: keep-alive" "https://c-s.net.ua/forum/ipb.html?act=attach&type=post&id=40051" -L -o 'cstrike_amxx_1_8_2_fix.zip' &&\
    unzip -q cstrike_amxx_1_8_2_fix.zip &&\
    cd cstrike_amxx_1_8_2_fix &&\
    cp cstrike_amxx_i386.so /home/cs/cstrike/addons/cstrike/dlls &&\
    echo "linux addons/cstrike/dlls/cstrike_amxx_i386.so" >> /home/cs/cstrike/addons/metamod/plugins.ini &&\
# ReGameDLL
    cd /home/Resources/regamedll &&\
    mkdir /home/cs/cstrike/addons/regamedll &&\
    curl --header "Host: c-s.net.ua" --header "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.183 Safari/537.36" --header "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9" --header "Accept-Language: ro-RO,ro;q=0.9,en;q=0.8" --header "Referer: https://c-s.net.ua/forum/topic81470.html" --header "Cookie: _ga=GA1.3.1603347949.1602960053; __gads=ID=f426b07af5c143a1-22526794ffb800af:T=1603190043:RT=1603190043:S=ALNI_MaFPky-pOiwPIbZanyNiU0Ksdqm0Q; _gid=GA1.3.999712779.1604595471; session_id=1176d37d74d1a5cf21577ccba8e1f55d; topicsread=a%3A4%3A%7Bi%3A17628%3Bi%3A1603190043%3Bi%3A84615%3Bi%3A1604596752%3Bi%3A81470%3Bi%3A1604348492%3Bi%3A74614%3Bi%3A1603821602%3B%7D" --header "Connection: keep-alive" "https://c-s.net.ua/forum/ipb.html?act=attach&type=post&id=45156" -L -o 'ReGameDLL_CS_publish_5.3.0.217_artifacts.zip' &&\
    unzip -q ReGameDLL_CS_publish_5.3.0.217_artifacts.zip &&\
    unzip -q regamedll-dist-5.3.0.217-dev.zip &&\
    cp bin/bugfixed/cs.so /home/cs/cstrike/dlls &&\
    cp game.cfg /home/cs/cstrike &&\
# ReAimDetector
    cd /home/Resources/reaimdetector &&\
    curl --header "Host: c-s.net.ua" --header "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36" --header "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9" --header "Accept-Language: ro-RO,ro;q=0.9,en;q=0.8" --header "Referer: https://c-s.net.ua/forum/topic84615.html" --header "Cookie: _ga=GA1.3.1603347949.1602960053;__gads=ID=f426b07af5c143a1-22526794ffb800af:T=1603190043:RT=1603190043:S=ALNI_MaFPky-pOiwPIbZanyNiU0Ksdqm0Q; session_id=b83b284a0cf31d151d82a2dd7600f65d; topicsread=a%3A4%3A%7Bi%3A17628%3Bi%3A1603190043%3Bi%3A84615%3Bi%3A1603916003%3Bi%3A81470%3Bi%3A1603477078%3Bi%3A74614%3Bi%3A1603821602%3B%7D; _gid=GA1.3.252331836.1603916004; _gat=1" --header "Connection: keep-alive" "https://c-s.net.ua/forum/ipb.html?act=attach&type=post&id=47508" -L -o 'reaimdetector_0.2.2.rar' &&\
    unrar x reaimdetector_0.2.2.rar &&\
    cp -r linux/addons /home/cs/cstrike/ &&\
    echo "reaimdetector" >> /home/cs/cstrike/addons/amxmodx/configs/modules.ini &&\
    cd /home/cs/cstrike/addons/amxmodx/scripting &&\
    ./amxxpc reaimdetector.sma &&\
    cp reaimdetector.amxx /home/cs/cstrike/addons/amxmodx/plugins/ &&\
    echo "reaimdetector.amxx" >> /home/cs/cstrike/addons/amxmodx/configs/plugins.ini &&\
# Cleaning
    rm -rf /home/Resources &&\
# Run server
    cd /home/cs/ &&\
    screen -A -m -d -S cs /home/cs/hlds_run -game cstrike +maxplayers 25 +map de_dust2 -autoupdate -pingboost 3" >> /home/cs/start.sh

The last screen command doesn't run when I start the container but when I enter in the container and run the exact same command it does run. The dockerfile builds an Counter-Strike 1.6 Server with reHLDS.

Edit: After I've tried ti7 method when I run the container it gives me this error :

docker: Error response from daemon: OCI runtime create failed: container_linux.go:349: starting container process caused "exec: \"start.sh\": executable file not found in $PATH": unknown.

This is the code I've tried :

echo "#!/bin/sh" >> /home/cs/start.sh &&\
    echo "# start.sh" &&\
    echo "screen -A -m -d -S cs /home/cs/hlds_run -game cstrike +maxplayers 25 +map de_dust2 -autoupdate -pingboost 3" >> /home/cs/start.sh &&\
    chmod +x /home/cs/start.sh &&\
    /home/cs/start.sh
WORKDIR /home/cs/
ENTRYPOINT ["/home/cs/start.sh"]

This is the command I run the image with :

sudo docker run -itd -p 27015:27015/udp --name=cs cstrike /bin/bash

ti7 · Accepted Answer · 2020-12-04T21:57:51.497

2

The screen is created before the container is finished

Directly set commands which should start with the container when it begins into the ENTRYPOINT or a script which it calls

#!/bin/bash
# start.sh
screen screen_command

# exec the final command replacing this script with the new process
# this makes the new process the forefront in Docker, keeping the container
# running until it exits and allowing signals to be passed (such as ^C)
exec sleep infinity

...
RUN generate_script.sh
WORKDIR /home/cs/
ENTRYPOINT ["/home/cs/start.sh"]

With an ENTRYPOINT, you don't need to specify any shell when running the container
Arguments passed after the name will be sent to the container and can be interpreted by the script more

docker run --detach --init --name foo-name container

edited Dec 04 '20 at 21:57

answered Dec 04 '20 at 19:31

ti7

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`CMD` is probably better. – John Kugelman Dec 04 '20 at 19:33
I've had mixed experience and I recall `ENTRYPOINT` is more convenient to pass arguments to (though that may not or may no longer be the case) – ti7 Dec 04 '20 at 19:35
@Zeth ah, you should call it with a full or relative path - I've updated my answer too – ti7 Dec 04 '20 at 20:50
does it work? the layers should be cached – ti7 Dec 04 '20 at 21:05
@ti7 now the container exists after 1 sec – Zeth Dec 04 '20 at 21:16
@Zeth you've posted that twice now after deleting it; do you mean *exists* or *exits*? – ti7 Dec 04 '20 at 21:20
I thought you didn't got that, sorry for typo... exits.. – Zeth Dec 04 '20 at 21:22
@Zeth no problem! hmm.. add a line to keep it open at the end of your entrypoint script - I'll update my Answer again – ti7 Dec 04 '20 at 21:25
@ti7 If I write exec sleep infinity the image will no longer be built. – Zeth Dec 05 '20 at 07:07
@Zeth I think your troubles come from identifying what is "in the image" vs what "runs when the image is started" - the image must contain stuff which the base system isn't guaranteed to have in it (some directories and CS 1.6 in your case), and when it runs, start your program and block exiting until it is complete (which for you is never, so you manually close the image). If you run your program in a screen (which is not necessary), then the main process continues and exits once its logic is complete. Blocking the process from ending is then necessary to keep the image from exiting. – ti7 Dec 05 '20 at 21:24
@ti7 thx for help and also thx for downvote (I think it was you), after I removed RUN generate_script.sh works like a charm :) – Zeth Dec 06 '20 at 13:38
@Zeth excellent and not I! If this solved your question, please mark it as the Answer with the green check at its left! – ti7 Dec 06 '20 at 17:45

screen command doesn't work in a container

1 Answers1