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Unit 7 Worksheet

Instructions

Fill out the worksheet as you progress through the lab and discussions. Hold your worksheets until the end to turn them in as a final submission packet.

Downloads

The worksheet has been provided below. The document(s) can be transposed to the desired format so long as the content is preserved. For example, the .txt could be transposed to a .md file.

Unit 7 Recording

Link: https://www.youtube.com/watch?v=dfQsb8GJA3k

Discussion Post #1

You are the team lead of a small Linux team maintaining 700 servers. Your management is always pushing for getting more from the systems and has been asking you to explore container environments, especially in the cloud. You read some blog posts about services and decide to write out your notes: https://aws.amazon.com/blogs/containers/amazon-ecs-vs-amazon-eks-making-sense-of-aws-container-services/

  1. What are the major differences between container environments and Kubernetes orchestrated environments?
    1. Why might you just want a containerized environment?
    2. Why might you want an orchestrated environment?
    3. Can you compare and contrast them?

Discussion Post #2

Your team is having problems with a deployment. This is the code snippet they are using.

  1. What is the provider they are using?
  2. How many docker instance are they trying to run, and what are their names?
    1. What ports are they going to be running on?
  3. Your team is having problems executing this and have brought it to you. What might you check, or do with terraform to try to resolve the issue?
    1. If it’s telling you there are no providers?
    2. If it’s saying there’s a syntax problem (how can you find it)?
    3. If there are no resources created?
terraform.tf
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terraform {
    required_providers {
        docker = {
            source = "kreuzwerker/docker"
            version = "~> 2.13.0"
        }
    }
}

provider "docker" {}

resource "docker_image" "nginx" {
    name = "nginx:latest"
    keep_locally = false
}

resource "docker_container" "nginx8080" {
    image = docker_image.nginx.latest
    name = "nginx8080"
    ports {
        internal = 80
        external = 8080
    }
}
resource "docker_container" "nginx8081" {
    image = docker_image.nginx.latest
    name = "nginx8081"
    ports {
        internal = 80
        external = 8081
    }
}
resource "docker_container" "nginx8082" {
    image = docker_image.nginx.latest
    name = "nginx8082"
    ports {
        internal = 80
        external = 8082
    }
}

Info

Submit your input by following the link. The discussion posts are done in Discord Forums.
Link to Discussion Posts

Definitions

  • Pipeline

  • Inotify-tools

Digging Deeper

  1. What are some of the best practices around container deployments? https://docs.docker.com/build/building/best-practices/

  2. Why might we not want to ever run the “latest” tag in production?

  3. Why should an application be run as non-root?
  4. What is it to be an immutable container?
  5. What is it to be a sandboxed container?
    1. What does this mean from the kernel standpoint

Reflection Questions

  1. What questions do you still have about this week?
  2. How are you going to use what you've learned in your current role?