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James Walker

James Walker is the founder of Heron Web, a UK-based software development studio providing bespoke solutions for SMEs. He has experience managing complete end-to-end web development workflows with DevOps, CI/CD, Docker, and Kubernetes. James is also a technical writer and has written extensively about the software development lifecycle, current industry trends, and DevOps concepts and technologies.
James Walker
How to Expose a Docker Port – Tutorial & Examples
Docker10 min read

How to Expose a Docker Port – Tutorial & Examples

Learn how to expose a port in Docker on running container using the docker run --expose command and the EXPOSE instruction. See examples.

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News on Spacelift, product updates, all IaC & DevOps

Recent posts

Helm vs. Terraform – Key Differences & Comparison
Terraform14 min read
Helm vs. Terraform – Key Differences & Comparison

Helm vs Terraform - learn what are the similarities and differences in managing your Kubernetes clusters with these tools.

Docker Exec Command – How to Use It, Tips & Examples
Docker12 min read
Docker Exec Command – How to Use It, Tips & Examples

What is the Docker exec command? Learn how to use it with -it, for multiple commands and other use cases. Docker run vs exec explained.

Kubernetes Network Policy – Guide with Examples
Kubernetes12 min read
Kubernetes Network Policy – Guide with Examples

Learn what are Network Policies in Kubernetes, how to implement them and best practices. See examples for default policies, egress and ingress.

What is Docker Init & When to Use It – Best Practices
Docker13 min read
What is Docker Init & When to Use It – Best Practices

Introduction to the new Docker init feature. See what it is, when and how to use it and best practices. Node.js example.

What are Kubernetes Manifest Files? Examples & Best Practices
Kubernetes13 min read
What are Kubernetes Manifest Files? Examples & Best Practices

Kubernetes manifest files explained. Learn how to create a manifest. See best practices and examples for pods, deployments, and networks.

Docker Ps Command – When to Use & Examples
Docker9 min read
Docker Ps Command – When to Use & Examples

Learn what does docker ps do and how to use its options for listing docker containers. See examples and how to filter docker ps output.

Guide to Kubernetes RBAC – Concepts, Example & Best Practices
Kubernetes12 min read
Guide to Kubernetes RBAC – Concepts, Example & Best Practices

Learn what is Kubernetes RBAC (role-based access control) and how it works. See examples and best practices. RBAC set up explained.

What is Kubernetes Lens? Tutorial & Alternatives
Kubernetes15 min read
What is Kubernetes Lens? Tutorial & Alternatives

Learn about Kubernetes Lens, its use cases, and alternatives. See a getting started tutorial and how to connect Lens to the Kubernetes cluster.

Kubernetes DaemonSet – What It is & How to Use (Example)
Kubernetes11 min read
Kubernetes DaemonSet – What It is & How to Use (Example)

What is a Kubernetes DaemonSet and what is it used for? See the example of how to create, update and delete it. Deployment vs StatefulSet vs DaemonSet.

17 Cloud Cost Optimization Best Practices for 2024
General13 min read
17 Cloud Cost Optimization Best Practices for 2024

What is cloud cost optimization? See the best way to optimize and manage cloud costs with strategies, solutions, and best practices.

Prometheus Operator – What is It, Tutorial & Examples
Kubernetes15 min read
Prometheus Operator – What is It, Tutorial & Examples

Deep dive into Prometheus Operator. Learn how to install it with Helm, and setting up ServiceMonitor and alertmanager. See examples.

How to Troubleshoot Kubernetes ImagePullBackOff
Kubernetes11 min read
How to Troubleshoot Kubernetes ImagePullBackOff

What is status ImagePullBackOff Kubernetes error, and what does it mean? Learn how to troubleshoot and debug to get rid of ImagePullBackOff.

Kubernetes Networking Explained – Guide for Beginners
Kubernetes16 min read
Kubernetes Networking Explained – Guide for Beginners

Deep dive into Kubernetes networking. With this guide, you’ll learn what it is, the types of networking, and the architecture.

Kubernetes ConfigMap – What It is, How to Use & Examples
Kubernetes11 min read
Kubernetes ConfigMap – What It is, How to Use & Examples

What is a ConfigMap in Kubernetes? Learn how to create, mount and update them. See examples and ConfigMap vs. Secrets.

AWS S3 Sync Command – Guide with Examples
AWS11 min read
AWS S3 Sync Command – Guide with Examples

Learn how and when to use AWS S3 sync command. See command options and examples, including how to sync the S3 bucket locally.

The 4Cs of Cloud-Native Security – From Code to Cluster
General13 min read
The 4Cs of Cloud-Native Security – From Code to Cluster

Learn about cloud native application security - what it is, what are the 4Cs of cloud-native security and best practices.

11 Most Useful Cloud Orchestration Tools & Platforms [2024]
General13 min read
11 Most Useful Cloud Orchestration Tools & Platforms [2024]

See what are the best tools and platforms for cloud orchestration. Learn what are the benefits of using them to coordinate IT operations in the cloud.

How to Add Comments in a YAML File [Tutorial]
General7 min read
How to Add Comments in a YAML File [Tutorial]

Learn how to comment on a YAML file with single-line comments and how to comment out multiple lines. See when to use them and best practices.

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