Commands tagged container (5)

  • 4
    for line in `docker ps | awk '{print $1}' | grep -v CONTAINER`; do docker ps | grep $line | awk '{printf $NF" "}' && echo $(( `cat /sys/fs/cgroup/memory/docker/$line*/memory.usage_in_bytes` / 1024 / 1024 ))MB ; done
    sammcj · 2014-09-24 04:37:01 1
  • Useful for containers and environments where you need to know if a port is currently in listen mode but you have not easy way or privileges to install net-tools like netstat or ss. "0A" is the code for listen state. The IP hex is reverse order and all in hex format. Show Sample Output

    cat /proc/net/tcp | grep " 0A " | sed 's/^[^:]*: \(..\)\(..\)\(..\)\(..\):\(....\).*/echo $((0x\4)).$((0x\3)).$((0x\2)).$((0x\1)):$((0x\5))/g' | bash
    glaudiston · 2020-05-23 12:36:21 11

  • 1
    for line in `docker ps | awk '{print $1}' | grep -v CONTAINER`; do docker ps | grep $line | awk '{printf $NF" "}' && echo $(( `cat /sys/fs/cgroup/memory/system.slice/docker-$line*/memory.usage_in_bytes` / 1024 / 1024 ))MB ; done
    unixmonkey89239 · 2015-07-03 23:09:45 0
  • I used this to resolve runtime dependencies of an application to create self-contained tar-balls (e.g. PHP for Docker or Rkt) Requirements: - realpath - ldd - find - grep - sort - uniq - xargs

    for f in $(find . -name "*.so"); do ldd -v $(realpath $f) | grep -Eo "(/[a-z0-9\_.+-]+)*" | uniq | xargs -I % cp --parents % /tmp/build; done
    mozzymoz · 2016-03-21 17:47:43 0
  • Run a job in the background and prefix it's output with some string. This is particularly useful if you are running inside a docker container in a startup script (sue me, I'll run two jobs in a docker container if I want to) and you can run something like: /usr/sbin/nginx 2>&1 | awk '{print "[NGINX] " $0}' & /opt/jws-3.1/tomcat8/bin/ run 2>&1 | awk '{print "[TOMCAT] " $0}' & while true; do ; done it can also be combined with tee to create a file log as well as a stdout log, for example if the script above where a script called "/bin/" then you could run /bin/ | tee /var/log/containerlogs Show Sample Output

    nginx 2>&1 | awk '{print "[NGINX] " $0}' &
    hvindin · 2017-04-25 22:18:38 0

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