docker设置并运行部分命令及原文

1.设置开机启动

If you want Docker to start at boot, you should also:

$ sudo systemctl enable docker

2. 启动，停止，重启

$ sudo systemctl start docker $ sudo systemctl stop docker $ sudo systemctl restart docker
3.开启本地和远程

修改/etc/sysconfig/docker文件，替换

-H fd://为

-H unix:///var/run/docker.sock -H 0.0.0.0:2376

4.boot2docker启动参数

/usr/local/bin/docker -d -D -g /var/lib/docker -H unix:// -H tcp://0.0.0.0:2376 --tlsverify --tlscacert=/var/lib/boot2docker/tls/ca.pem --tlscert=/var/lib/

5. 确认docker启动

Verify that the

docker

daemon is running as specified with the

ps

command.

$ ps aux | grep docker | grep -v grep

Configuring and running Docker on various distributions

After successfully installing Docker, the

docker

daemon runs with its default configuration.

In a production environment, system administrators typically configure the

docker

daemon to start and stop according to an organization’s requirements. In most cases, the system administrator configures a process manager such as

SysVinit

,

Upstart

, or

systemd

to manage the

docker

daemon’s start and stop.

Running the docker daemon directly

The

docker

daemon can be run directly using the

-d

option. By default it listens on the Unix socket

unix:///var/run/docker.sock

$ docker -d

INFO[0000] +job init_networkdriver()
INFO[0000] +job serveapi(unix:///var/run/docker.sock)
INFO[0000] Listening for HTTP on unix (/var/run/docker.sock)
...
...

Configuring the docker daemon directly

If you’re running the

docker

daemon directly by running

docker -d

instead of using a process manager, you can append the configuration options to the

docker

run command directly. Just like the

-d

option, other options can be passed to the

docker

daemon to configure it.

Some of the daemon’s options are:

Flag	Description
-D , --debug=false	Enable or disable debug mode. By default, this is false.
-H , --host=[]	Daemon socket(s) to connect to.
--tls=false	Enable or disable TLS. By default, this is false.

Here is a an example of running the

docker

daemon with configuration options:

$ docker -d -D --tls=true --tlscert=/var/docker/server.pem --tlskey=/var/docker/serverkey.pem -H tcp://192.168.59.3:2376

These options :

Enable

-D

(debug) mode

Set

tls

to true with the server certificate and key specified using

--tlscert

and

--tlskey

respectively

Listen for connections on

tcp://192.168.59.3:2376

The command line reference has the complete list of daemon flags with explanations.

Ubuntu

As of

14.04

, Ubuntu uses Upstart as a process manager. By default, Upstart jobs are located in

/etc/init

and the

docker

Upstart job can be found at

/etc/init/docker.conf

.

After successfully installing Docker for Ubuntu, you can check the running status using Upstart in this way:

$ sudo status docker

docker start/running, process 989

Running Docker

You can start/stop/restart the

docker

daemon using

$ sudo start docker

$ sudo stop docker

$ sudo restart docker

Configuring Docker

You configure the

docker

daemon in the

/etc/default/docker

file on your system. You do this by specifying values in a

DOCKER_OPTS

variable.

To configure Docker options:

Log into your host as a user with

sudo

or

root

privileges.

If you don’t have one, create the

/etc/default/docker

file on your host. Depending on how you installed Docker, you may already have this file.

Open the file with your favorite editor.

$ sudo vi /etc/default/docker

Add a

DOCKER_OPTS

variable with the following options. These options are appended to the

docker

daemon’s run command.

DOCKER_OPTS="-D --tls=true --tlscert=/var/docker/server.pem --tlskey=/var/docker/serverkey.pem -H tcp://192.168.59.3:2376"

These options :

Enable

-D

(debug) mode

Set

tls

to true with the server certificate and key specified using

--tlscert

and

--tlskey

respectively

Listen for connections on

tcp://192.168.59.3:2376

The command line reference has the complete list of daemon flags with explanations.

Save and close the file.

Restart the

docker

daemon.

$ sudo restart docker

Verify that the

docker

daemon is running as specified with the

ps

command.

$ ps aux | grep docker | grep -v grep

Logs

By default logs for Upstart jobs are located in

/var/log/upstart

and the logs for

docker

daemon can be located at

/var/log/upstart/docker.log

$ tail -f /var/log/upstart/docker.log
INFO[0000] Loading containers: done.
INFO[0000] docker daemon: 1.6.0 4749651; execdriver: native-0.2; graphdriver: aufs
INFO[0000] +job acceptconnections()
INFO[0000] -job acceptconnections() = OK (0)
INFO[0000] Daemon has completed initialization

CentOS / Red Hat Enterprise Linux / Fedora

As of

7.x

, CentOS and RHEL use

systemd

as the process manager. As of

21

, Fedora uses

systemd

as its process manager.

After successfully installing Docker for CentOS/Red Hat Enterprise Linux/Fedora, you can check the running status in this way:

$ sudo systemctl status docker

Running Docker

You can start/stop/restart the

docker

daemon using

$ sudo systemctl start docker

$ sudo systemctl stop docker

$ sudo systemctl restart docker

If you want Docker to start at boot, you should also:

$ sudo systemctl enable docker

Configuring Docker

You configure the

docker

daemon in the

/etc/sysconfig/docker

file on your host. You do this by specifying values in a variable. For CentOS 7.x and RHEL 7.x, the name of the variable is

OPTIONS

and for CentOS 6.x and RHEL 6.x, the name of the variable is

other_args

. For this section, we will use CentOS 7.x as an example to configure the

docker

daemon.

By default, systemd services are located either in

/etc/systemd/service

,

/lib/systemd/system

or

/usr/lib/systemd/system

. The

docker.service

file can be found in either of these three directories depending on your host.

To configure Docker options:

Log into your host as a user with

sudo

or

root

privileges.

If you don’t have one, create the

/etc/sysconfig/docker

file on your host. Depending on how you installed Docker, you may already have this file.

Open the file with your favorite editor.

$ sudo vi /etc/sysconfig/docker

Add a

OPTIONS

variable with the following options. These options are appended to the command that starts the

docker

daemon.

OPTIONS="-D --tls=true --tlscert=/var/docker/server.pem --tlskey=/var/docker/serverkey.pem -H tcp://192.168.59.3:2376"

These options :

Enable

-D

(debug) mode

Set

tls

to true with the server certificate and key specified using

--tlscert

and

--tlskey

respectively

Listen for connections on

tcp://192.168.59.3:2376

The command line reference has the complete list of daemon flags with explanations.

Save and close the file.

Restart the

docker

daemon.

$ sudo service docker restart

Verify that the

docker

daemon is running as specified with the

ps

command.

$ ps aux | grep docker | grep -v grep

Logs

systemd has its own logging system called the journal. The logs for the

docker

daemon can be viewed using

journalctl -u docker

$ sudo journalctl -u docker
May 06 00:22:05 localhost.localdomain systemd[1]: Starting Docker Application Container Engine...
May 06 00:22:05 localhost.localdomain docker[2495]: time="2015-05-06T00:22:05Z" level="info" msg="+job serveapi(unix:///var/run/docker.sock)"
May 06 00:22:05 localhost.localdomain docker[2495]: time="2015-05-06T00:22:05Z" level="info" msg="Listening for HTTP on unix (/var/run/docker.sock)"
May 06 00:22:06 localhost.localdomain docker[2495]: time="2015-05-06T00:22:06Z" level="info" msg="+job init_networkdriver()"
May 06 00:22:06 localhost.localdomain docker[2495]: time="2015-05-06T00:22:06Z" level="info" msg="-job init_networkdriver() = OK (0)"
May 06 00:22:06 localhost.localdomain docker[2495]: time="2015-05-06T00:22:06Z" level="info" msg="Loading containers: start."
May 06 00:22:06 localhost.localdomain docker[2495]: time="2015-05-06T00:22:06Z" level="info" msg="Loading containers: done."
May 06 00:22:06 localhost.localdomain docker[2495]: time="2015-05-06T00:22:06Z" level="info" msg="docker daemon: 1.5.0-dev fc0329b/1.5.0; execdriver: native-0.2; graphdriver: devicemapper"
May 06 00:22:06 localhost.localdomain docker[2495]: time="2015-05-06T00:22:06Z" level="info" msg="+job acceptconnections()"
May 06 00:22:06 localhost.localdomain docker[2495]: time="2015-05-06T00:22:06Z" level="info" msg="-job acceptconnections() = OK (0)"

Note: Using and configuring journal is an advanced topic and is beyond the scope of this article.