Lab Information
Nautilus project developers are planning to start testing on a new project. As per their meeting with the DevOps team, they want to test containerized environment application features. As per details shared with DevOps team, we need to accomplish the following task:
a. Pull busybox:musl image on App Server 3 in Stratos DC and re-tag (create new tag) this image as busybox:media.
Lab Solutions
Part 1: Lab Step-by-Step Guidelines
✅ Task
On App Server 3 (stapp03), you must:
Pull image: busybox:musl
Re-tag it as: busybox:media
Step 1: Login to the Jump Host
Use the provided jump host credentials:
ssh thor@jump-host
# Password:
mjolnir123
Step 2: SSH into App Server 3
From the jump host, connect to stapp03:
ssh banner@stapp03
# Password:
BigGr33n
Step 3: Pull the required Docker image
Run:
docker pull busybox:musl
Step 4: Re-tag the image
Create the new tag:
docker tag busybox:musl busybox:media
Step 5: Verify
Check whether both tags exist:
docker images | grep busybox
Expected result:
You should see something like:
busybox media 0188a8de47ca 18 months ago 1.51MB
busybox musl 0188a8de47ca 18 months ago 1.51MB
The IMAGE ID should be the same for both tags.
Part 2: Simple Step-by-Step Explanation (Beginner Friendly)
What is happening in this lab?
You are working with Docker images.
Docker images are like templates used to create containers.
In this task, you are told to:
download one image (busybox:musl)
then give it another name (busybox:media)
Why do we log into Jump Host first?
You usually cannot directly access internal servers.
So you first go into:
jump-host
Then from there, you connect to:
stapp03
This is a common real-world secure infrastructure setup.
What does this command do?
docker pull busybox:musl
It means:
“Download the BusyBox image with tag musl.”
Breakdown:
busybox = image name
musl = image tag/version
What does this command do?
docker tag busybox:musl busybox:media
It means:
“Take the existing image and give it a new tag called media.”
So now the same image can be referenced as:
busybox:musl
busybox:media
Why verify with docker images?
docker images | grep busybox
This confirms the task is complete.
If both tags appear, you're done.
⚠️ Common Mistakes
❌ Mistake 1: Logging into wrong app server
Correct server is:
stapp03
Not stapp01 or stapp02.
❌ Mistake 2: Wrong username
Correct login for App Server 3:
banner
Not tony or steve.
❌ Mistake 3: Typing the tag incorrectly
Correct:
busybox:media
Wrong examples:
busybox-media
busybox media
busybox:Media
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