docker run and docker exec differences

docker run and docker exec differences

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RUN Docker : The image to create a container and a run command, the operation target image ;

Exec Docker : Run run vessel, operating against a  container .

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docker run the command

grammar

docker run [OPTIONS] IMAGE [COMMAND] [ARG...]

OPTIONS Description:

• stdin -a :  Specifies the standard input and output content types, optionally STDIN / STDOUT / STDERR three;

• -d :  background container, and returns the container ID;

• -i :  Run vessel in interactive mode, typically used in conjunction with -t;

• -P :  random port mapping, inside the container ports randomly mapped to the host port of the high

• -p :  Specifies port mapping format: a host (host) port : a container port

• -t :  reassign a pseudo input terminal into a container, normally used in conjunction with -i;

• = --name "Nginx-LB" :  a name of the container;

• 8.8.8.8 - DNS :  the DNS server to use the container specified, the default host and consistent;

• example.com-Search - DNS :  Specifies the DNS search domain container, and the default host agreement;

• -H "Mars" :  hostname specified container;

• username = -e "Ritchie" :  set environment variables;

• File-= --env [] :  read a file from the specified environment variable;

• = --cpuset "0-2" or --cpuset = "0,1,2" :  bind to a designated container CPU operation;

• -m : setting the maximum memory using the container;

• = - Net "Bridge" :  network connection type of the container, support bridge / host / none / container:four types;

• = --link [] :  add a link to another vessel;

• = --expose [] :  opening a port or a group of ports;

• --volume, -v : binding a roll

Examples

Use docker mirror nginx: mode starts after a latest table container, and the container was designated as my-nginx.

docker run --name my-nginx -p 8081:80 -d nginx:latest

 

Browser to http: // Host IP: 8081, the effect is as follows:

 

Mirroring Nginx: mode starts after a latest table container port 80 and container port random mapped to the host:

docker run -P -d nginx:latest

 

Mirroring nginx: after the latest start a container station mode, map the host port 80 to port 80, the container main directory / data mapped to the container / data:

docker run -p 80:80 -v /data:/data -d nginx:latest

 

Mirroring nginx: latest start a container in interactive mode, execute / bin / bash command in the container:

docker run -it nginx:latest /bin/bash

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docker exec command

grammar

docker exec [OPTIONS] CONTAINER COMMAND [ARG...]

OPTIONS Description:

• -d :  Split mode: running in the background

• -i :   Even without additional remains open STDIN

• -t :  assign a pseudo-terminal

 

In the container name my-nginx open a terminal interaction mode:

docker exec -it my-nginx /bin/bash

 

Or use containers ID  721eb23901ce  terminal open an interactive mode:

docker exec -it 721eb23901ce /bin/bash