Lab Information
The Nautilus DevOps team aims to containerize various applications following a recent meeting with the application development team. They intend to conduct testing with the following steps:
Install docker-ce and docker compose packages on App Server 3.
Initiate the docker service.
Lab Solutions
✅ Part 1: Exact KodeKloud Lab Guidelines (Exam-Safe Mode)
🔑 Step 0: Login to App Server 3
# From the jump host:
ssh banner@stapp03
#Password:
BigGr33n
🔧 Step 1: Install Docker CE and Docker Compose (RHEL/CentOS)
sudo yum install -y yum-utils
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
sudo yum install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
▶️ Step 2: Start Docker service
sudo systemctl start docker
🔍 Step 3: Verification (MANDATORY)
systemctl status docker
docker --version
docker compose version
🧠 Part 2: Beginner-Friendly Explanation
🪜 Why these steps?
Jump host is only a gateway
You must SSH into stapp03 to do real work.
Docker isn’t in default repos
We add Docker’s official repo so the system can find docker-ce.
Compose is now a plugin
docker-compose-plugin gives you:
docker compose
(⚠️ not docker-compose)
Docker must be started
Installed ≠ running
Labs often fail if you forget this step.
🧠 Exam Memory Hook
Right server → Install → Start → Verify
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