standalone
Ateh a 1.3
Depois da 1.13
via pacote
$ curl -fsSL https://get.docker.com/ | sh
$ tail /var/log/upstart/docker.io.log
sudo mv /var/lib/docker/network/files/ /tmp/dn-bak
Exportar imagem para arquivo docker save mynewimage > /tmp/mynewimage.tar
Importar arquivo para imagem docker load < /tmp/mynewimage.tar
Listar container docker ps -a
Commitar nova imagem a partir de uma imagem existente docker commit 3a09b2588478 mynewimage
Comitar sudo docker commit idContainer ubuntu
Baixar uma imagem sudo docker pull ubuntu
Criando o primeiro container sudo docker run ubuntu echo "iniciando..."
Abrindo uma imagem existente sudo docker run -it ubuntu /bin/bash
Criar imagem com base em outra # baixando imagem sudo docker pull ubuntu
# criando um container da imagem (seria o inicio de um fork)
sudo docker run ubuntu echo "iniciando..."
# pegando o id do container criado
sudo docker ps -l
# agora vamos criar o fork definitivamente comitando isso
sudo docker commit 4366112051f2 ubuntu
# imagem foi criada, agora vamos abri-la fazer mais coisas
sudo docker run -it ubuntu /bin/bash
# faça as alterações que quiser depois dê um `exit` e então vamos pegar o novo container criado e vamos commitar
sudo docker ps -l
sudo docker commit novoIdContainer ubuntu
docker: Error response from daemon: rpc error: code = 2 desc = "oci runtime error: could not synchronise with container process: not a directory".
/etc/init.dsudo chmod +x /etc/init.id/docker
update-rc.d docker defaults
Script do service
#!/bin/sh
set -e
### BEGIN INIT INFO
# Provides: docker
# Required-Start: $syslog $remote_fs
# Required-Stop: $syslog $remote_fs
# Should-Start: cgroupfs-mount cgroup-lite
# Should-Stop: cgroupfs-mount cgroup-lite
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Create lightweight, portable, self-sufficient containers.
# Description:
# Docker is an open-source project to easily create lightweight, portable,
# self-sufficient containers from any application. The same container that a
# developer builds and tests on a laptop can run at scale, in production, on
# VMs, bare metal, OpenStack clusters, public clouds and more.
### END INIT INFO
export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
BASE=docker
# modify these in /etc/default/$BASE (/etc/default/docker)
DOCKERD=/usr/bin/dockerd
# This is the pid file managed by docker itself
DOCKER_PIDFILE=/var/run/$BASE.pid
# This is the pid file created/managed by start-stop-daemon
DOCKER_SSD_PIDFILE=/var/run/$BASE-ssd.pid
DOCKER_LOGFILE=/var/log/$BASE.log
DOCKER_OPTS=
DOCKER_DESC="Docker"
# Get lsb functions
. /lib/lsb/init-functions
if [ -f /etc/default/$BASE ]; then
. /etc/default/$BASE
fi
# Check docker is present
if [ ! -x $DOCKERD ]; then
log_failure_msg "$DOCKERD not present or not executable"
exit 1
fi
check_init() {
# see also init_is_upstart in /lib/lsb/init-functions (which isn't available in Ubuntu 12.04, or we'd use it directly)
if [ -x /sbin/initctl ] && /sbin/initctl version 2>/dev/null | grep -q upstart; then
log_failure_msg "$DOCKER_DESC is managed via upstart, try using service $BASE $1"
exit 1
fi
}
fail_unless_root() {
if [ "$(id -u)" != '0' ]; then
log_failure_msg "$DOCKER_DESC must be run as root"
exit 1
fi
}
cgroupfs_mount() {
# 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
return
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
)
}
case "$1" in
start)
check_init
fail_unless_root
cgroupfs_mount
touch "$DOCKER_LOGFILE"
chgrp docker "$DOCKER_LOGFILE"
ulimit -n 1048576
# Having non-zero limits causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
if [ "$BASH" ]; then
ulimit -u unlimited
else
ulimit -p unlimited
fi
log_begin_msg "Starting $DOCKER_DESC: $BASE"
start-stop-daemon --start --background \
--no-close \
--exec "$DOCKERD" \
--pidfile "$DOCKER_SSD_PIDFILE" \
--make-pidfile \
-- \
-p "$DOCKER_PIDFILE" \
$DOCKER_OPTS \
>> "$DOCKER_LOGFILE" 2>&1
log_end_msg $?
;;
stop)
check_init
fail_unless_root
if [ -f "$DOCKER_SSD_PIDFILE" ]; then
log_begin_msg "Stopping $DOCKER_DESC: $BASE"
start-stop-daemon --stop --pidfile "$DOCKER_SSD_PIDFILE" --retry 10
log_end_msg $?
else
log_warning_msg "Docker already stopped - file $DOCKER_SSD_PIDFILE not found."
fi
;;
restart)
check_init
fail_unless_root
docker_pid=`cat "$DOCKER_SSD_PIDFILE" 2>/dev/null`
[ -n "$docker_pid" ] \
&& ps -p $docker_pid > /dev/null 2>&1 \
&& $0 stop
$0 start
;;
force-reload)
check_init
fail_unless_root
$0 restart
;;
status)
check_init
status_of_proc -p "$DOCKER_SSD_PIDFILE" "$DOCKERD" "$DOCKER_DESC"
;;
*)
echo "Usage: service docker {start|stop|restart|status}"
exit 1
;;
esac
Client:
Version: 1.8.0
API version: 1.20
Go version: go1.4.2
Git commit: 0d03096
Built: Tue Aug 11 17:17:40 UTC 2015
OS/Arch: linux/amd64
GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"
keywords
docker install