5. Advanced Docker
by Scott Gallagher, Allan Espinosa, Russ McKendrick, Santosh Kumar Konduri, Vaibhav
Docker: Creating Structured Containers
- Docker
- Table of Contents
- Docker
- Meet Your Course Guide
- 1. Course Module 1: Learning Docker
- 1. Getting Started with Docker
- An introduction to Docker
- Docker on Linux
- Differentiating between containerization and virtualization
- Docker networking/linking
- Installing Docker
- Downloading the first Docker image
- Running the first Docker container
- Running a Docker container on Amazon Web Services
- Troubleshooting
- 2. Up and Running
- Docker terminologies
- Docker commands
- The daemon command
- The version command
- The info command
- The run command
- The search command
- The pull command
- The start command
- The stop command
- The restart command
- The rm command
- The ps command
- The logs command
- The inspect command
- The top command
- The attach command
- The kill command
- The cp command
- The port command
- Running your own project
- Dockerfile
- 3. Container Image Storage
- 4. Working with Docker containers and images
- 5. Publishing Images
- 6. Running Your Private Docker Infrastructure
- 7. Running Services in a Container
- 8. Sharing Data with Containers
- 9. Docker Machine
- 10. Docker Compose
- 11. Docker Swarm
- 12. Testing with Docker
- 13. Debugging Containers
- 1. Getting Started with Docker
- 2. Course Module 2: Networking Docker
- 1. Docker Networking Primer
- 2. Docker Networking Internals
- 3. Building Your First Docker Network
- 4. Networking in a Docker Cluster
- 5. Next Generation Networking Stack for Docker – libnetwork
- 3. Course Module 3: Monitoring Docker
- 1. Introduction to Docker Monitoring
- 2. Using the Built-in Tools
- 3. Advanced Container Resource Analysis
- 4. A Traditional Approach to Monitoring Containers
- 5. Querying with Sysdig
- 6. Exploring Third Party Options
- 7. Collecting Application Logs from within the Container
- 8. What Are the Next Steps?
- 4. Course Module 4: Securing Docker
- 1. Securing Docker Hosts
- 2. Securing Docker Components
- 3. Securing and Hardening Linux Kernels
- 4. Docker Bench for Security
- Docker security – best practices
- Docker – best practices
- CIS guide
- The Docker Bench Security application
- Running the tool
- Understanding the output
- Understanding the output – host configuration
- Understanding the output – the Docker daemon configuration
- Understanding the output – the Docker daemon configuration files
- Understanding the output – container images and build files
- Understanding the output – container runtime
- Understanding the output – Docker security operations
- 5. Monitoring and Reporting Docker Security Incidents
- 6. Using Docker's Built-in Security Features
- 7. Securing Docker with Third-Party Tools
- 8. Keeping up Security
- 5. Course Module 5: Mastering Docker
- 1. Docker in Production
- 2. Shipyard
- 3. Panamax
- 4. Tutum
- 5. Advanced Docker
- A. Reflect and Test Yourself! Answers
- Module 1: Learning Docker
- Chapter 1: Getting Started with Docker
- Chapter 6: Running Your Private Docker Infrastructure
- Chapter 7: Running Services In a Container
- Chapter 8: Sharing Data with Containers
- Chapter 9: Docker Machine
- Chapter 10: Orchestrating Docker
- Chapter 11: Docker Swarm
- Chapter 12: Testing with Docker
- Chapter 13: Debugging Containers
- Module 2: Networking Docker
- Module 3: Monitoring Docker
- Module 4: Securing Docker
- Chapter 2: Securing Docker Components
- Chapter 3: Securing and Hardening Linux Kernels
- Chapter 4, Docker Bench for Security
- Chapter 5, Monitoring and Reporting Docker Security Incidents
- Chapter 6, Using Docker's Built-in Security Features
- Chapter 7, Securing Docker with Third-party Tools
- Chapter 8, Keeping up Security
- Module 5: Mastering Docker
- Module 1: Learning Docker
- B. Bibliography
- Index
We've made it to the last chapter, and you've stuck with it until the end! In this chapter, we will be taking a look at some advanced Docker topics. Let's take a peek into what we will be covering in this chapter:
- Scaling Docker
- Using the discovery services
- Debugging or troubleshooting Docker
- Common issues and solutions
- Various Docker APIs
- Keeping your containers in check
- Contributing to Docker
- Advanced Docker networking
In this section, we will learn how to scale Docker. Earlier, in module 1, we looked at using Docker Compose to do our scaling. In this section, we will look at other technologies that we can utilize to do the scaling for us. We will take a look at two such technologies—one that you can use through the command line and the other two that can be used through a web interface.
- Kubernetes: We have looked at another command line earlier to scale Docker—Docker Compose. There are other tools out there that you can use to scale your Docker environments from the command line. One such tool is Kubernetes:
$ kubectl scale [--resource-version=version] [--current-replicas=count] --replicas=COUNT RESOURCE NAME $ kubectl scale --current-replicas=1 --replicas=2 Host Node
You can find out more about it at http://kubernetes.io/v1.0/docs/user-guide/kubectl/kubectl_scale.html.
- Mist.io: With Mist.io, you can perform all your Docker actions in this software, everything from adding your cloud environments to locally run Docker installations. You can then see all the machines or nodes that are on that host and check whether they are running or have been stopped. You can also view information about them such as any alerts that they may have as well as their usage. You can also scale environments within the web console as well. While Mist.io is free to use, there is a fee if you want to use their monitoring service. It does come with a free trial for 15 days though. Scaling is done just by selecting the node that you want to scale and entering a value to scale to, the rest is all done automatically for you.
- Shipyard: When it comes to being able to scale easily, I am not sure there is an easier way than using Shipyard. Like Mist.io, you can easily scale nodes by using Shipyard. In Chapter 2, Shipyard, we saw how easy it was to do tasks such as scale running containers using Shipyard.
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