Как да промените местоположението на файла на Docker sock?

Чудите се как да промените пътя на файла docker.sock?

Съдържание

Какво е Docker Socket?

Файлът на Docker socket се намира в /var/run/docker.sock

Използва се за комуникация с основния докер демон (процес) по подразбиране. Това е входната точка за Docker API. Този сокет се използва от Docker CLI по подразбиране за изпълнение на docker команди.

Нека ви покажа как да промените местоположението на docker sock файла.

Спрете Docker

Първо, ако услугата докер работи на вашата система, спрете я. За да потвърдите, че е спрял, изпълнете командата status.

[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 pctechbg.net 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 pctechbg.net 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 pctechbg.net 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 pctechbg.net dockerd[1474]: time="2019-11-10T01:57:23.635519865-05:00" level=info msg="Container 3141793b98f315dc90a57d81006
Nov 10 01:57:24 pctechbg.net dockerd[1474]: time="2019-11-10T01:57:24.091797103-05:00" level=info msg="ignoring event" module=libcontainerd
Nov 23 15:36:56 pctechbg.net systemd[1]: Stopping Docker Application Container Engine...
Nov 23 15:36:56 pctechbg.net dockerd[1474]: time="2019-11-23T15:36:56.992795411-05:00" level=info msg="Processing signal 'terminated'"
Nov 23 15:36:58 pctechbg.net dockerd[1474]: time="2019-11-23T15:36:58.234014533-05:00" level=info msg="ignoring event" module=libcontainerd
Nov 23 15:37:00 pctechbg.net dockerd[1474]: time="2019-11-23T15:37:00.403572098-05:00" level=info msg="ignoring event" module=libcontainerd
Nov 23 15:37:00 pctechbg.net systemd[1]: Stopped Docker Application Container Engine.

Редактирайте docker.conf и docker.socket

Следното, променям пътя от /var/run/docker.sock към /home/pctechbg.net/docker.sock

Редактирайте файла docker.conf в директорията /etc/init/ с новото местоположение. Просто трябва да редактирате един ред с пътя DOCKER_SOCKET.

[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" "$DOCKER_OPTS" | grep -qE -e '-H|--host'; then
<strong>DOCKER_SOCKET=/home/pctechbg.net/docker.sock
</strong>else
DOCKER_SOCKET=$(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

Редактирайте файла docker.socket, намиращ се в /lib/systemd/system/ с актуализираното местоположение на файла docker.sock.

[email protected]:~$ sudo gedit /lib/systemd/system/docker.socket

[Unit]

Description=Docker Socket for the API

PartOf=docker.service

[Socket]

<strong>ListenStream=/home/pctechbg.net/docker.sock
</strong>
SocketMode=0660

SocketUser=root

SocketGroup=docker

[Install]

WantedBy=sockets.target

Изпълнете командата по-долу, за да актуализирате промените (местоположението на docker sock файла).

[email protected]:~$ sudo systemctl daemon-reload

Стартирайте Docker

Нека да стартираме докер услугата и да проверим състоянието, ако е стартирана. Ще видите в края на дневника на състоянието, отпечатан на терминала, ще даде актуализирания път на файла docker.sock.

[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 pctechbg.net 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 pctechbg.net dockerd[8840]: time="2019-11-23T15:39:35.093149218-05:00" level=info msg="Loading containers: start."
Nov 23 15:39:35 pctechbg.net 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 pctechbg.net dockerd[8840]: time="2019-11-23T15:39:36.078753190-05:00" level=info msg="Loading containers: done."
Nov 23 15:39:36 pctechbg.net 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 pctechbg.net 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 pctechbg.net 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 pctechbg.net dockerd[8840]: time="2019-11-23T15:39:36.820821712-05:00" level=info msg="Daemon has completed initialization"
Nov 23 15:39:36 pctechbg.net systemd[1]: Started Docker Application Container Engine.
Nov 23 15:39:36 pctechbg.net dockerd[8840]: time="2019-11-23T15:39:36.883382952-05:00" level=info msg="API listen on <strong>/home/pctechbg.net/docker.sock</strong>"

Изпълнете командата ls по пътя на файла docker.sock, само за да потвърдите, че този файл е създаден, когато сте стартирали услугата докер.

[email protected]:~$ ls -l
total 466832
-rw-r--r-- 1 pctechbg.net pctechbg.net 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 pctechbg.net pctechbg.net 10982406 Oct 7 06:21 apache-tomcat-9.0.27.tar.gz
drwxr-xr-x 8 pctechbg.net pctechbg.net 4096 Oct 23 06:05 chef-repo
-rw-r--r-- 1 pctechbg.net pctechbg.net 252269838 Jul 1 15:16 chef-server-core_13.0.17-1_amd64.deb
-rw-r--r-- 1 pctechbg.net pctechbg.net 129713682 Dec 27 2018 chef-workstation_0.2.43-1_amd64.deb
drwxr-xr-x 2 pctechbg.net pctechbg.net 4096 Oct 23 2018 Desktop
-rw-r--r-- 1 pctechbg.net pctechbg.net 726 Jul 27 15:10 Dockerfile
srw-rw---- 1 root docker 0 Nov 23 15:39 <strong>docker.sock</strong>
drwxr-xr-x 2 pctechbg.net pctechbg.net 4096 Oct 23 2018 Documents
drwxr-xr-x 2 pctechbg.net pctechbg.net 4096 Jul 20 18:20 Downloads
-rw-r--r-- 1 pctechbg.net pctechbg.net 8980 Oct 23 2018 examples.desktop

Успешно актуализирахте местоположението на docker sock файла.

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