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TASK 140: Docker Copy Operations

Requirements​

The Nautilus DevOps team has some conditional data present on App Server 2 in Stratos Datacenter. There is a container ubuntu_latest running on the same server. We received a request to copy some of the data from the docker host to the container. Below are more details about the task:

On App Server 2 in Stratos Datacenter copy an encrypted file /tmp/nautilus.txt.gpg from docker host to ubuntu_latest container (running on same server) in /home/ location. Please do not try to modify this file in any way.

Note

The original task statement remains unchanged in Requirements. The commands below use a single docker cp transfer path and then verify the file inside the container.

Prerequisites​

  • You can SSH to App Server 2 and switch to a privileged shell.
  • The container ubuntu_latest is already running on the host.
  • The source file /tmp/nautilus.txt.gpg already exists on the host and should be copied without modification.

Steps​

Login to the App Server and switch to root. For the server credentials, check out the Project Nautilus documentation.

sshpass -p  '*******' ssh -o StrictHostKeyChecking=no steve@172.16.238.11
sudo su -
*******

Check for any running container.

[root@stapp02 ~]# docker ps -a

CONTAINER ID   IMAGE     COMMAND       CREATED              STATUS              PORTS     NAMES
a6a7a7674ff4   ubuntu    "/bin/bash"   About a minute ago   Up About a minute             ubuntu_latest

Copy the specified file onto the container's directory.

docker cp /tmp/nautilus.txt.gpg ubuntu_latest:/home/

Verify.

[root@stapp02 ~]# docker exec ubuntu_latest  ls -ltr /home/ 
total 4
-rw-r--r-- 1 root root 74 Jun 29 16:31 nautilus.txt.gpg

Verification​

  • Confirm the file exists inside the container with docker exec ubuntu_latest ls -ltr /home/.
  • Verify that nautilus.txt.gpg appears in /home/ and that its name matches the source file exactly.

Resources​