Tech Sharing Blog

Using Docker HEALTHCHECK to Ensure Your Containers Stay Healthy

David — Sat, 14 Sep 2024 12:38:52 +0000

When running containers in Docker, ensuring that they are not only running but also functioning properly is crucial for stable applications. One way to achieve this is by leveraging Docker’s HEALTHCHECK instruction, which helps monitor the health of your containerized services. In this blog post, we’ll dive into what a Docker HEALTHCHECK is, how to…

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Docker command: COPY vs ADD

David — Sat, 14 Sep 2024 01:41:11 +0000

In Docker, both COPY and ADD are used to copy files from the host system into the Docker image during the build process, but they have some key differences: COPY: ADD: Best Practice: Example: Performance and Clarity:

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Streamlining CodeCommit Access with AWS SSO Sessions

David — Thu, 30 Nov 2023 08:30:20 +0000

In the ever-evolving landscape of AWS services, CodeCommit stands out as a robust version control service. With the increasing adoption of AWS Single Sign-On (SSO), connecting to CodeCommit with an SSO session has become a streamlined process, enhancing security and user management. In this blog post, we’ll guide you through the steps to set up…

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Kubernetes: keeping Mysql password in secrets

David — Thu, 16 Nov 2023 12:53:00 +0000

Similar to storing the configMap, which keeps the data in the Kubernetes cluster, secrets are specifically intended to hold confidential data. A Secret is an object that contains a small amount of sensitive data such as a password, a token, or a key. Such information might otherwise be put in a Pod specification or in…

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Kubernetes Configmap

David — Thu, 16 Nov 2023 09:10:25 +0000

In Kubernetes, a ConfigMap is an API resource that allows you to decouple configuration artifacts from the containerized application. It provides a straightforward way to store key-value pairs, configuration files, or environment variables that your applications might need. ConfigMaps are particularly useful in scenarios where you want to: Creating a ConfigMap involves specifying key-value pairs…

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Streamlining Operations with Kubernetes: A Guide to Jobs and CronJobs

David — Mon, 13 Nov 2023 02:20:43 +0000

In today’s fast-paced digital landscape, efficient and automated task scheduling is essential for managing containerized applications. Kubernetes, the industry-standard container orchestration platform, provides two key resources for this purpose: Jobs and CronJobs. Let’s delve into these powerful features and explore how they can enhance your containerized workflows. Kubernetes Jobs: Jobs are a versatile resource in…

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Unleashing the Power of Kubernetes DaemonSets

David — Sun, 12 Nov 2023 05:26:12 +0000

A DaemonSet ensures that each Node within a cluster hosts a copy of a specific Pod. When nodes join the cluster, Pods are automatically deployed to them, and as nodes depart, these Pods are systematically removed through garbage collection. Deleting a DaemonSet leads to the cleanup of all associated Pods. Some typical uses of a…

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Kubernetes – RBAC: Service account, role and role binding

David — Fri, 10 Nov 2023 11:02:53 +0000

In Kubernetes RBAC (Role-Based Access Control), service accounts play a vital role in granting and managing permissions for pods and other resources within the cluster. Service accounts are a fundamental component of ensuring secure and controlled access in your Kubernetes environment. In the previous post, we delved into the concepts of roles, role bindings, cluster…

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Kubernetes – RBAC: Cluster role and cluster role binding

David — Fri, 10 Nov 2023 09:21:29 +0000

ClusterRole serves as a pivotal Kubernetes element, wielding authority over a spectrum of permissions on non-resource URLs within the cluster. Its cluster-wide dominion extends across namespaces, offering a panoply of controls for cluster-scale operations. Building upon our earlier user role and role binding creation within the default namespace, we encounter a difficulty. While our role…

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Kubernetes – RBAC: Create user, role and role binding

David — Fri, 10 Nov 2023 03:13:13 +0000

RBAC in Kubernetes operates on the principle of least privilege, ensuring that users and components have the minimum permissions necessary for their tasks. Here’s a step-by-step guide to creating users, roles, and role bindings: Step 1: Generate the private key for the user Step 2: Generate the CSR file for the newly created private key…

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