Copy files from docker container to host (docker cp)

command

docker cp <Container ID or container name>:Path of the file you want to copy Copy destination path

Can be copied with. Click here for the reference.

Illustration

I'm running oracle with docker and want to check the connection information, so copy tnsnames.ora.

When container ID is specified

#Check container ID(CONTAINER ID)
$ docker ps
CONTAINER ID        IMAGE                       COMMAND                  CREATED             STATUS                 PORTS                                            NAMES
d3e6c3fd1a85        oracle/database:19.3.0-ee   "/bin/sh -c 'exec $O…"   2 hours ago         Up 2 hours (healthy)   0.0.0.0:1521->1521/tcp, 0.0.0.0:5500->5500/tcp   orcl

#make a copy
$ docker cp d3e6c3fd1a85:/opt/oracle/oradata/dbconfig/ORCLCDB/tnsnames.ora ./

#Check if you could copy
$ find tnsnames.ora
tnsnames.ora

When specifying the container name

#Look up the container name(NAMES)　
$ docker ps
CONTAINER ID        IMAGE                       COMMAND                  CREATED             STATUS                 PORTS                                            NAMES
d3e6c3fd1a85        oracle/database:19.3.0-ee   "/bin/sh -c 'exec $O…"   2 hours ago         Up 2 hours (healthy)   0.0.0.0:1521->1521/tcp, 0.0.0.0:5500->5500/tcp   orcl

#make a copy
$ docker cp orcl:/opt/oracle/oradata/dbconfig/ORCLCDB/tnsnames.ora ./

#Check if you could copy
$ find tnsnames.ora
tnsnames.ora

Environmental information

$ docker version
Client: Docker Engine - Community
 Cloud integration  0.1.18
 Version:           19.03.13
 API version:       1.40
 Go version:        go1.13.15
 Git commit:        4484c46d9d
 Built:             Wed Sep 16 16:58:31 2020
 OS/Arch:           darwin/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.13
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       4484c46d9d
  Built:            Wed Sep 16 17:07:04 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          v1.3.7
  GitCommit:        8fba4e9a7d01810a393d5d25a3621dc101981175
 runc:
  Version:          1.0.0-rc10
  GitCommit:        dc9208a3303feef5b3839f4323d9beb36df0a9dd
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683

$ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.15.7
BuildVersion:	19H2

reference

-Copy files between host and container with Docker -Copy files from Docker container to host -Install Oracle 19c on Mac with Docker and build a development environment