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- Utilize multiple stages to reduce the size of the final image.
- Keep the final image lean by copying only necessary artifacts from previous stages.
- Combine multiple RUN commands using && to minimize the number of layers.
- Clean up unnecessary files and dependencies within the same RUN command.
- Exclude unnecessary files and directories from the build context using .dockerignore.
- This reduces the size of the build context and speeds up the build process.
- Place frequently changing dependencies lower in the Dockerfile to leverage Docker's layer caching mechanism.
- Avoid unnecessary package installations that could bloat the image size.
- Specify precise version tags for base images to ensure consistency and avoid unexpected updates.
- Pinning versions mitigates the risk of breaking changes introduced by newer versions.
- Use smaller base images like Alpine Linux where possible to reduce the overall size of the image.
- Remove unnecessary dependencies and files from the final image to make it as lightweight as possible.
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Are endless manual deployments and sluggish release cycles holding your team back? You're not alone! But fear not, there's a solution that can turn your development process into a well-oiled machine: CI/CD (Continuous Integration/Continuous Delivery).
The benefits are out of this world:
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1.
terraform init:- Initializes a working directory containing Terraform configuration files.
2.
terraform plan:- Generates an execution plan, outlining actions Terraform will take.
3.
terraform apply:- Applies the changes described in the Terraform configuration.
4.
terraform destroy:- Destroys all resources described in the Terraform configuration.
5.
terraform validate:- Checks the syntax and validity of Terraform configuration files.
6.
terraform refresh:- Updates the state file against real resources in the provider.
7.
terraform output:- Displays the output values from the Terraform state.
8.
terraform state list:- Lists resources within the Terraform state.
9.
terraform show:- Displays a human -readable output of the current state or a specific resource’s state.
10.
terraform import:- Imports existing infrastructure into Terraform state.
11.
terraform fmt:- Rewrites Terraform configuration files to a canonical format.
12.
terraform graph:- Generates a visual representation of the Terraform dependency graph.
13.
terraform providers:- Prints a tree of the providers used in the configuration.
14.
terraform workspace list:- Lists available workspaces.
15.
terraform workspace select:- Switches to another existing workspace.
16.
terraform workspace new:- Creates a new workspace.
17.
terraform workspace delete:- Deletes an existing workspace.
18.
terraform output:- Retrieves output values from a module.
19.
terraform state mv:- Moves an item in the state.
20.
terraform state pull:- Pulls the state from a remote backend.
21.
terraform state push:- Pushes the state to a remote backend.
22.
terraform state rm:- Removes items from the state.
23.
terraform taint:- Manually marks a resource for recreation.
24.
terraform untaint:- Removes the ‘tainted’ state from a resource.
25.
terraform login:- Saves credentials for Terraform Cloud.
26.
terraform logout:- Removes credentials for Terraform Cloud.
27.
terraform force -unlock:- Releases a locked state.
28.
terraform import:- Imports existing infrastructure into your Terraform state.
29.
terraform plan -out:- Saves the generated plan to a file.
30.
terraform apply -auto -approve:- Automatically applies changes without requiring approval.
31.
terraform apply -target=resource:- Applies changes only to a specific resource.
32.
terraform destroy -target=resource:- Destroys a specific resource.
33.
terraform apply -var=”key=value”:- Sets a variable’s value directly in the command line.
34.
terraform apply -var -file=filename.tfvars:- Specifies a file containing variable definitions.
35.
terraform apply -var -file=filename.auto.tfvars:- Automatically loads variables from a file.
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Here are the 8 steps to understand the Linux boot process in the easiest manner.
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Understanding how to expose Kubernetes services is key for building robust applications.
In this post,We'll walk through the main service types and ingress in Kubernetes.
Services in Kubernetes allow pods to communicate with each other and provide a stable endpoint that doesn't change as pods are created or deleted. There are several types of services:
Ingress is another Kubernetes resource that allows you to route external traffic to services based on HTTP rules. Ingress exposes HTTP and HTTPS routes from outside the cluster to services within the cluster. Traffic routing is controlled by rules defined on the Ingress resource.
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While building robust and scalable microservices can seem complex, understanding essential concepts empowers you for success. This post explores crucial elements for designing reliable distributed systems using Java and Spring frameworks.
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Let's face it: the only thing more relentless than the pace of innovation in DevOps is our collective ability to find excuses not to keep up with it! 🏃 💨
Embrace the chaos, love the learning, and remember: if DevOps feels like it's pushing you out of your comfort zone, it's probably because your comfort zone could use a bit of cloud-based scalability and automation.😜
😎 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝗳𝗼𝗿 𝗺𝗼𝗿𝗲 𝘀𝘂𝗰𝗵 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 𝗮𝗿𝗼𝘂𝗻𝗱 𝗰𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀!!! // Join for DevOps DOCs: @devopsdocs
Embrace the chaos, love the learning, and remember: if DevOps feels like it's pushing you out of your comfort zone, it's probably because your comfort zone could use a bit of cloud-based scalability and automation.
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𝗧𝗿𝗮𝗱𝗶𝘁𝗶𝗼𝗻𝗮𝗹 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝘄𝗼𝗿𝗸𝗳𝗹𝗼𝘄𝘀 often suffer from environment inconsistencies, portability issues, and complex deployments.
➡️ Virtual machines (VMs) offer some isolation, but they're resource-hungry and slow.
Enter 𝗗𝗼𝗰𝗸𝗲𝗿, the containerization platform that has revolutionized software development.
➡️ 𝗪𝗵𝗮𝘁 𝗶𝘀 𝗗𝗼𝗰𝗸𝗲𝗿? 🐬
Docker 𝗽𝗮𝗰𝗸𝗮𝗴𝗲𝘀 𝘆𝗼𝘂𝗿 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗶𝘁𝘀 𝗱𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝗰𝗶𝗲𝘀 𝗶𝗻𝘁𝗼 𝗮 𝘀𝘁𝗮𝗻𝗱𝗮𝗿𝗱𝗶𝘇𝗲𝗱 𝘂𝗻𝗶𝘁 called a 𝗰𝗼𝗻𝘁𝗮𝗶𝗻𝗲𝗿.
This container is 𝗶𝘀𝗼𝗹𝗮𝘁𝗲𝗱 from the underlying system, ensuring your application runs 𝗰𝗼𝗻𝘀𝗶𝘀𝘁𝗲𝗻𝘁𝗹𝘆 across different environments.
➡️ 𝗧𝗵𝗶𝗻𝗸 𝗼𝗳 𝗶𝘁 𝗹𝗶𝗸𝗲 𝘁𝗵𝗶𝘀:
Imagine a shipping container.
You pack all your application's clothes (code and dependencies) inside.
This container can then be shipped anywhere (deployed anywhere) and unpacked (run) with the same contents and behavior.
➡️ 𝗪𝗵𝘆 𝗗𝗼𝗰𝗸𝗲𝗿 𝗼𝘃𝗲𝗿 𝗩𝗠𝘀?
Compared to VMs, Docker containers:
Are lightweight: They share the host OS, requiring fewer resources and booting faster.
Are portable: Run them anywhere with the same consistency, regardless of the underlying system.
Are immutable: Changes are isolated within the container, simplifying deployments and rollbacks.
➡️ 𝗗𝗼𝗰𝗸𝗲𝗿'𝘀 𝗯𝗲𝗻𝗲𝗳𝗶𝘁𝘀:
• Streamlined development and deployment: Spin up isolated test environments quickly, collaborate seamlessly, and automate deployments.
• Improved resource efficiency: Containers share resources, maximizing server utilization.
• Microservices architecture: Package and deploy individual services independently.
• Cloud-native compatibility: Works seamlessly across different cloud providers.
• Enhanced security: Isolated containers minimize attack surfaces.
➡️ 𝗪𝗵𝗲𝗻 𝘁𝗼 𝘂𝘀𝗲 𝗗𝗼𝗰𝗸𝗲𝗿:
• Microservices architecture
• Continuous integration and continuous delivery (CI/CD) pipelines
• Legacy application modernization
• Multi-cloud deployments
➡️ 𝗗𝗼𝗰𝗸𝗲𝗿'𝘀 𝗰𝗼𝗺𝗽𝗲𝘁𝗶𝘁𝗶𝗼𝗻:
• Podman: Open-source container engine similar to Docker.
• LXC (Linux Containers): Lightweight containerization alternative.
😎 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝗳𝗼𝗿 𝗺𝗼𝗿𝗲 𝘀𝘂𝗰𝗵 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 𝗮𝗿𝗼𝘂𝗻𝗱 𝗰𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀!!!
Enter 𝗗𝗼𝗰𝗸𝗲𝗿, the containerization platform that has revolutionized software development.
Docker 𝗽𝗮𝗰𝗸𝗮𝗴𝗲𝘀 𝘆𝗼𝘂𝗿 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗶𝘁𝘀 𝗱𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝗰𝗶𝗲𝘀 𝗶𝗻𝘁𝗼 𝗮 𝘀𝘁𝗮𝗻𝗱𝗮𝗿𝗱𝗶𝘇𝗲𝗱 𝘂𝗻𝗶𝘁 called a 𝗰𝗼𝗻𝘁𝗮𝗶𝗻𝗲𝗿.
This container is 𝗶𝘀𝗼𝗹𝗮𝘁𝗲𝗱 from the underlying system, ensuring your application runs 𝗰𝗼𝗻𝘀𝗶𝘀𝘁𝗲𝗻𝘁𝗹𝘆 across different environments.
Imagine a shipping container.
You pack all your application's clothes (code and dependencies) inside.
This container can then be shipped anywhere (deployed anywhere) and unpacked (run) with the same contents and behavior.
Compared to VMs, Docker containers:
Are lightweight: They share the host OS, requiring fewer resources and booting faster.
Are portable: Run them anywhere with the same consistency, regardless of the underlying system.
Are immutable: Changes are isolated within the container, simplifying deployments and rollbacks.
• Streamlined development and deployment: Spin up isolated test environments quickly, collaborate seamlessly, and automate deployments.
• Improved resource efficiency: Containers share resources, maximizing server utilization.
• Microservices architecture: Package and deploy individual services independently.
• Cloud-native compatibility: Works seamlessly across different cloud providers.
• Enhanced security: Isolated containers minimize attack surfaces.
• Microservices architecture
• Continuous integration and continuous delivery (CI/CD) pipelines
• Legacy application modernization
• Multi-cloud deployments
• Podman: Open-source container engine similar to Docker.
• LXC (Linux Containers): Lightweight containerization alternative.
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Otherwise, you risk falling into a pattern of reactive responses, never fully seizing the initiative.
It's like starring in your own tech horror show.
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Looking to optimize your Kubernetes deployment for peak performance? Explore these cutting-edge scaling strategies:
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Setting up an effective DevOps pipeline involves a combination of practices, tools, and cultural considerations.
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𝐋𝐢𝐬𝐭 𝐨𝐟 𝐟𝐫𝐞𝐞 𝐜𝐨𝐮𝐫𝐬𝐞𝐬 𝐭𝐨 𝐭𝐫𝐚𝐧𝐬𝐟𝐨𝐫𝐦 𝐘𝐨𝐮𝐫 𝐒𝐤𝐢𝐥𝐥𝐬: 𝐃𝐢𝐯𝐞 𝐢𝐧𝐭𝐨 𝐭𝐡𝐞 𝐖𝐨𝐫𝐥𝐝 𝐨𝐟 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐰𝐢𝐭𝐡 𝐭𝐡𝐞𝐬𝐞 𝐦𝐮𝐬𝐭 𝐭𝐫𝐲 𝐅𝐫𝐞𝐞 𝐂𝐨𝐮𝐫𝐬𝐞𝐬
🔢 . 𝐏𝐲𝐭𝐡𝐨𝐧:
A scripting language used for automation in DevOps.
🔗 https://lnkd.in/gTEsX2VC
🔢 . 𝐆𝐢𝐭:
Distributes version control system handles everything from small to very large projects with speed and efficiency.
🔗 https://lnkd.in/gFTyTWCC
🔢 . 𝐂𝐥𝐨𝐮𝐝:
Its fair to say the rapid increament of startUps is revolutionised by the cloud technology.
🔗 https://lnkd.in/gf6_8RNG
🔢 . 𝐌𝐢𝐜𝐫𝐨𝐬𝐞𝐫𝐯𝐢𝐜𝐞𝐬:
An approach of making a loosely coupled application.
🔗 https://lnkd.in/gYqdHCdF
🔢 . 𝐒𝐞𝐫𝐯𝐞𝐫𝐥𝐞𝐬𝐬:
Allows developers to build and run applications without worrying about servers.
🔗 https://lnkd.in/g8knM8uE
🔢 . 𝐋𝐢𝐧𝐮𝐱:
Probably the most famous primitive yet secure OS to use
🔗 https://lnkd.in/ghmZybpz
🔢 . 𝐃𝐞𝐯𝐎𝐩𝐬:
An exploding domain to learn (It is an ecosystem that takes care of continuous integration, delivery, deployment and monitoring)
🔗 https://lnkd.in/g6ryYv8N
🔢 . 𝐃𝐨𝐜𝐤𝐞𝐫:
Packages application along with dependencies and libraries required to run the application.
🔗 https://lnkd.in/ggaqmu8p
🔢 . 𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬, 𝐎𝐩𝐞𝐧𝐒𝐡𝐢𝐟𝐭:
Manages the deployment of an application and have autoscaling and autohealing capabilities.
🔗 https://lnkd.in/gsKYTciW
🔢 🔢 . 𝐌𝐲𝐒𝐐𝐋:
Relational Database Management System
🔗 https://lnkd.in/gbmjQcsD
😎 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝗳𝗼𝗿 𝗺𝗼𝗿𝗲 𝘀𝘂𝗰𝗵 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 𝗮𝗿𝗼𝘂𝗻𝗱 𝗰𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀!!! // Join for DevOps DOCs: @devopsdocs
A scripting language used for automation in DevOps.
Distributes version control system handles everything from small to very large projects with speed and efficiency.
Its fair to say the rapid increament of startUps is revolutionised by the cloud technology.
An approach of making a loosely coupled application.
Allows developers to build and run applications without worrying about servers.
Probably the most famous primitive yet secure OS to use
An exploding domain to learn (It is an ecosystem that takes care of continuous integration, delivery, deployment and monitoring)
Packages application along with dependencies and libraries required to run the application.
Manages the deployment of an application and have autoscaling and autohealing capabilities.
Relational Database Management System
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Kubernetes, commonly referred to as K8s, is an open-source container orchestration platform designed to automate the deployment, scaling, and management of containerized applications.
- Physical or virtual machines that form the cluster.
- Each node runs container runtime (like Docker), kubelet (agent for managing node), and a kube-proxy.
- The smallest deployable units in kubernetes.
- Containers within a pod share the same network namespace, enabling them to communicate easily.
- Defines a set of pods and how they should be accessed.
- Provides a stable IP address and DNS name to access the pods.
- Ensures a specified number of replicas (pods) are running at all times.
- Helps with scaling and ensuring high availability.
- Manages ReplicaSets, allowing declarative updates to applications.
- Supports rolling updates and rollbacks.
- Defines the desired state for the application.
- Uses YAML files for configuration.
- Adjusts the number of replicas for a Deployment or ReplicaSet.
- Allows communication between different services within the cluster.
- Uses DNS names to locate services.
- Modifies the configuration to roll out updates.
- Supports rolling updates with zero downtime.
- Reverts to a previous version in case of issues with a new deployment.
- Controls and manages the overall cluster.
- Components: kube-apiserver, kube-controller-manager, kube-scheduler, etcd (distributed key-value store).
- Executes tasks assigned by the Master Node.
- Components: kubelet, container runtime (e.g., Docker), kube-proxy.
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- Command-level operations are fine.
- To excel in system architecture, deep knowledge of network protocols, IP routing, firewall management, and secure communication channels is essential.
- GUIs are intuitive, but incomplete.
- Get started with CLI from Day 1.
- Terraform, Ansible, Kubernetes, AWS - you name it, every single provider has a CLI.
- DevOps is not just about connecting tools.
- Automating tasks, writing hooks, API integration, and more needs solid programming expertise.
- Python, Go, Rust are promising choices.
- No day goes by without an API.
- Authentication methods like OAuth, JWT, and contract testing are crucial for smooth service integration.
- Knowing how to effectively consume and design RESTful services cannot be a choice.
- Robust troubleshooting skills across apps and infrastructure are non-negotiable.
- Tools such as
strace, netstat, tcpdump, and app-specific debuggers enable swift, effective problem-solving.- Tools aren't enough; couple it with an open mindset.
- Being security responsible from the start is imperative.
- Strict adherence to least privilege, RBAC, centralized secrets management, and a single source of truth is mandatory.
- Mastering how to catch, handle, and log exceptions can be a lifesaver in unexpected failure scenarios.
- Business is about dealing with humans; technology is built by and for humans.
- Effectively working in a team, understanding requirements, and clearly presenting technical solutions are underrated.
- But that makes all the difference more than anything else.
It's not about 'what if I start learning today.'
It's about understanding the gaps in the past and keeping updating.
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#devopshiring
😎 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝗳𝗼𝗿 𝗺𝗼𝗿𝗲 𝘀𝘂𝗰𝗵 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 𝗮𝗿𝗼𝘂𝗻𝗱 𝗰𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀!!! // Join for DevOps DOCs: @devopsdocs
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