Promena putanje Docker socket datoteke
Da li se pitate kako promeniti putanju do datoteke docker.sock?
Šta je Docker Socket?
Docker socket datoteka se po standardu nalazi na lokaciji /var/run/docker.sock.
Ona služi za komunikaciju sa glavnim Docker demonom (procesom). Predstavlja ulaznu tačku za Docker API. Docker CLI, uobičajeno, koristi ovaj socket za izvršavanje Docker komandi.
U nastavku ćemo objasniti kako promeniti lokaciju ove datoteke.
Zaustavljanje Docker servisa
Pre svega, ako je Docker servis aktivan na vašem sistemu, potrebno ga je zaustaviti. Nakon toga, proverite njegov status kako biste bili sigurni da je zaustavljen.
[email protected]:~$ sudo service docker stop [email protected]:~$ sudo service docker status ● docker.service - Docker Application Container Engine Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled) Active: inactive (dead) since Sat 2019-11-23 15:37:00 EST; 4s ago Docs: https://docs.docker.com Process: 1474 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock (code=exited, status=0/SUCCESS) Main PID: 1474 (code=exited, status=0/SUCCESS) Nov 10 01:56:49 techblog.co.rs dockerd[1474]: time="2019-11-10T01:56:49-05:00" level=error msg="2019/11/10 06:56:49 Entering go-plugins-helper Nov 10 01:56:49 techblog.co.rs dockerd[1474]: time="2019-11-10T01:56:49-05:00" level=error msg="time="2019-11-10T06:56:49Z" level=debug msg= Nov 10 01:56:49 techblog.co.rs dockerd[1474]: time="2019-11-10T01:56:49-05:00" level=error msg="time="2019-11-10T06:56:49Z" level=error msg= Nov 10 01:57:23 techblog.co.rs dockerd[1474]: time="2019-11-10T01:57:23.635519865-05:00" level=info msg="Container 3141793b98f315dc90a57d81006 Nov 10 01:57:24 techblog.co.rs dockerd[1474]: time="2019-11-10T01:57:24.091797103-05:00" level=info msg="ignoring event" module=libcontainerd Nov 23 15:36:56 techblog.co.rs systemd[1]: Stopping Docker Application Container Engine... Nov 23 15:36:56 techblog.co.rs dockerd[1474]: time="2019-11-23T15:36:56.992795411-05:00" level=info msg="Processing signal 'terminated'" Nov 23 15:36:58 techblog.co.rs dockerd[1474]: time="2019-11-23T15:36:58.234014533-05:00" level=info msg="ignoring event" module=libcontainerd Nov 23 15:37:00 techblog.co.rs dockerd[1474]: time="2019-11-23T15:37:00.403572098-05:00" level=info msg="ignoring event" module=libcontainerd Nov 23 15:37:00 techblog.co.rs systemd[1]: Stopped Docker Application Container Engine.
Izmena konfiguracije Docker servisa i socket-a
U sledećem koraku, menja se putanja sa /var/run/docker.sock na /home/vdwzvdw/docker.sock.
- Prvo, izmenite datoteku
docker.confkoja se nalazi u direktorijumu/etc/init/, postavljajući novu lokaciju socket-a. Potrebno je izmeniti samo liniju sa definicijomDOCKER_SOCKETputanje.
[email protected]:~$ sudo gedit /etc/init/docker.conf
description "Docker daemon"
start on (filesystem and net-device-up IFACE!=lo)
stop on runlevel [!2345]
limit nofile 524288 1048576
# Having non-zero limits causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
limit nproc unlimited unlimited
respawn
kill timeout 20
pre-start script
# see also https://github.com/tianon/cgroupfs-mount/blob/master/cgroupfs-mount
if grep -v '^#' /etc/fstab | grep -q cgroup
|| [ ! -e /proc/cgroups ]
|| [ ! -d /sys/fs/cgroup ]; then
exit 0
fi
if ! mountpoint -q /sys/fs/cgroup; then
mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup
fi
(
cd /sys/fs/cgroup
for sys in $(awk '!/^#/ { if ($4 == 1) print $1 }' /proc/cgroups); do
mkdir -p $sys
if ! mountpoint -q $sys; then
if ! mount -n -t cgroup -o $sys cgroup $sys; then
rmdir $sys || true
fi
fi
done
)
end script
script
# modify these in /etc/default/$UPSTART_JOB (/etc/default/docker)
DOCKERD=/usr/bin/dockerd
DOCKER_OPTS=
if [ -f /etc/default/$UPSTART_JOB ]; then
. /etc/default/$UPSTART_JOB
fi
exec "$DOCKERD" $DOCKER_OPTS --raw-logs
end script
# Don't emit "started" event until docker.sock is ready.
# See https://github.com/docker/docker/issues/6647
post-start script
DOCKER_OPTS=
DOCKER_SOCKET=
if [ -f /etc/default/$UPSTART_JOB ]; then
. /etc/default/$UPSTART_JOB
fi
if ! printf "%s" "$DOCKER_OPTS" | grep -qE -e '-H|--host'; then
DOCKER_SOCKET=/home/techblog.co.rs/docker.sock
else
DOCKER_SOCKET=$(printf "%s" "$DOCKER_OPTS" | grep -oP -e '(-H|--host)W*unix://K(S+)' | sed 1q)
fi
if [ -n "$DOCKER_SOCKET" ]; then
while ! [ -e "$DOCKER_SOCKET" ]; do
initctl status $UPSTART_JOB | grep -qE "(stop|respawn)/" && exit 1
echo "Waiting for $DOCKER_SOCKET"
sleep 0.1
done
echo "$DOCKER_SOCKET is up"
fi
end script
- Zatim, izmenite datoteku
docker.socketkoja se nalazi u/lib/systemd/system/, unoseći ažuriranu lokaciju zadocker.sockdatoteku.
[email protected]:~$ sudo gedit /lib/systemd/system/docker.socket
[Unit]
Description=Docker Socket for the API
PartOf=docker.service
[Socket]
ListenStream=/home/techblog.co.rs/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
[Install]
WantedBy=sockets.target
Nakon izmena, pokrenite sledeću komandu kako bi promene bile primenjene.
[email protected]:~$ sudo systemctl daemon-reload
Pokretanje Docker servisa
Sada, pokrenite Docker servis i proverite njegov status. U statusnom logu, na dnu izlaza, možete videti ažuriranu putanju docker.sock datoteke.
[email protected]:~$ sudo service docker start
[email protected]:~$ sudo service docker status
docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2019-11-23 15:39:36 EST; 3s ago
Docs: https://docs.docker.com
Main PID: 8840 (dockerd)
Tasks: 17
Memory: 47.6M
CGroup: /system.slice/docker.service
└─8840 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
Nov 23 15:39:35 techblog.co.rs dockerd[8840]: time="2019-11-23T15:39:35.091941184-05:00" level=warning msg="Your kernel does not support cgroup rt runtime"
Nov 23 15:39:35 techblog.co.rs dockerd[8840]: time="2019-11-23T15:39:35.093149218-05:00" level=info msg="Loading containers: start."
Nov 23 15:39:35 techblog.co.rs dockerd[8840]: time="2019-11-23T15:39:35.957842188-05:00" level=info msg="Default bridge (docker0) is assigned with an IP address 172.17.0.0/16. Daemon
Nov 23 15:39:36 techblog.co.rs dockerd[8840]: time="2019-11-23T15:39:36.078753190-05:00" level=info msg="Loading containers: done."
Nov 23 15:39:36 techblog.co.rs dockerd[8840]: time="2019-11-23T15:39:36.664727326-05:00" level=info msg="Docker daemon" commit=481bc77 graphdriver(s)=overlay2 version=18.09.6
Nov 23 15:39:36 techblog.co.rs dockerd[8840]: time="2019-11-23T15:39:36.817929464-05:00" level=error msg="cluster exited with error: error while loading TLS certificate in /var/lib/do
Nov 23 15:39:36 techblog.co.rs dockerd[8840]: time="2019-11-23T15:39:36.820439024-05:00" level=error msg="swarm component could not be started" error="error while loading TLS certific
Nov 23 15:39:36 techblog.co.rs dockerd[8840]: time="2019-11-23T15:39:36.820821712-05:00" level=info msg="Daemon has completed initialization"
Nov 23 15:39:36 techblog.co.rs systemd[1]: Started Docker Application Container Engine.
Nov 23 15:39:36 techblog.co.rs dockerd[8840]: time="2019-11-23T15:39:36.883382952-05:00" level=info msg="API listen on /home/techblog.co.rs/docker.sock"
Na kraju, pokrenite ls komandu na putanji gde ste definisali docker.sock datoteku, kako biste potvrdili njeno kreiranje kada je Docker servis pokrenut.
[email protected]:~$ ls -l
total 466832
-rw-r--r-- 1 techblog.co.rs techblog.co.rs 0 Oct 23 05:32 ]
drwxr-xr-x 9 tomcat tomcat 4096 Nov 18 14:30 apache-tomcat-9.0.27
-rw-r--r-- 1 techblog.co.rs techblog.co.rs 10982406 Oct 7 06:21 apache-tomcat-9.0.27.tar.gz
drwxr-xr-x 8 techblog.co.rs techblog.co.rs 4096 Oct 23 06:05 chef-repo
-rw-r--r-- 1 techblog.co.rs techblog.co.rs 252269838 Jul 1 15:16 chef-server-core_13.0.17-1_amd64.deb
-rw-r--r-- 1 techblog.co.rs techblog.co.rs 129713682 Dec 27 2018 chef-workstation_0.2.43-1_amd64.deb
drwxr-xr-x 2 techblog.co.rs techblog.co.rs 4096 Oct 23 2018 Desktop
-rw-r--r-- 1 techblog.co.rs techblog.co.rs 726 Jul 27 15:10 Dockerfile
srw-rw---- 1 root docker 0 Nov 23 15:39 docker.sock
drwxr-xr-x 2 techblog.co.rs techblog.co.rs 4096 Oct 23 2018 Documents
drwxr-xr-x 2 techblog.co.rs techblog.co.rs 4096 Jul 20 18:20 Downloads
-rw-r--r-- 1 techblog.co.rs techblog.co.rs 8980 Oct 23 2018 examples.desktop
Uspešno ste ažurirali lokaciju Docker socket datoteke.
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