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Docker Setup and AWS RDS Lab Highlights Key Timing and Config Lessons

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A developer on day 35 of a structured DevOps track tackled two practical tasks: installing Docker on a CentOS server and building an EC2-RDS application stack on AWS. The Docker portion clarified that 'systemctl start' and 'systemctl enable' serve distinct purposes — starting the daemon immediately versus ensuring it persists after a reboot. Installing Docker on RHEL or CentOS requires manually adding the official repository before any packages can be found, a step that catches many beginners off guard. On the AWS side, the RDS instance was provisioned first due to its five-to-ten minute setup time, allowing SSH and Apache configuration to fill the wait and avoid idle time. The exercise underscored a broader principle: in time-boxed environments, always trigger the slowest asynchronous resource before moving on to other tasks.

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Docker Setup and AWS RDS Lab Highlights Key Timing and Config Lessons · ShortSingh