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GIT

Git Shallow

Git shallow allows to clone large size repositories with lesser time.

A "shallow clone" refers to a clone of a repository that only contains a limited history of the repository's commits. When you perform a shallow clone, Git retrieves only a subset of the commits from the remote repository, truncating the history beyond a certain depth. This can be useful when you are only interested in the recent history of a project and don't need the entire commit history.

Benefits of Using Shallow Clones

  1. Reduced Cloning Time: Shallow clones significantly decrease the time it takes to clone large repositories by limiting the data transferred.
  2. Lower Storage Requirements: By fetching only a subset of the commit history, shallow clones consume less disk space.
git clone --depth 1 <repository-url>
# The --depth option is used to specify the depth of the clone, i.e., the number of most recent commits to fetch.

To convert a shallow clone to a full clone with the entire commit history, you can use command:

git fetch --unshallow

Git lfs

Git LFS (Large File Storage) is an extension to Git that deals with large files by replacing them with text pointers inside the Git repository, while storing the actual file content in an external storage system.
This allows you to version control large binary files, such as audio, video, datasets, and other large assets, without causing significant bloat in your Git repository.

Git Fork

Workflow of Forking a Repository

Fork the Repository:

On a platform like GitHub, you click the "Fork" button, which creates a personal copy of the original repository under your account.

  1. Clone the Fork:

    Clone your forked repository to your local machine for development. The command might look like this:

    git clone https://github.com/yourusername/forked-repo.git
    
  2. Add Upstream Remote:

    You can add the original repository as a remote to keep track of changes:

    git remote add upstream https://github.com/originaluser/original-repo.git
    
  3. Work on the Fork:

    Make changes in your local copy, commit them, and push them to your remote fork on GitHub:

    git add .
    git commit -m "Your commit message"
    git push origin branch_name
    

    Submit a Pull Request:

  4. Once your changes are ready, you can submit a pull request from your forked repository to the original repository for the maintainers to review and potentially merge into the main project.

    Syncing with Upstream:

    If the original repository (upstream) gets updated, you can fetch those changes and merge them into your forked repository:

    git fetch upstream
    git merge upstream/main
    

Git config to set git credentials

Streamlining Git Authentication with Global and System Configurations

Managing credentials securely and conveniently is essential for developers working with Git, especially in collaborative environments. Manually entering credentials every time you clone or interact with repositories can be frustrating and disrupt workflow and think if you want to automate git clone/fetch in runtime. Fortunately, Git provides configurations that allow you to set up credentials once so that they’re automatically used for subsequent interactions. This guide will show you how to set up Git credentials using the git config command, making your development process smoother and more efficient.

The Challenge: Repeated Authentication Requests

Without configured Git credentials, every time you attempt to clone, pull, or push to a repository, Git will prompt you to enter your username and password. This repetitive process can be:

  • Time-consuming: Typing credentials every time you work with Git repositories can take up valuable time.
  • Disruptive: Stopping to enter credentials disrupts flow, especially in high-iteration development cycles.
  • Error-prone: Frequent manual entries increase the chance of typos and authentication errors, leading to potential lockouts or delays.

For developers, automating this process can boost productivity and reduce friction in daily work.

Solution: Configuring Git with Persistent Credentials

Git offers two configuration levels that can store credentials, so you don’t need to re-enter them each time:

  1. Global Configuration: Applies settings for the current user across all repositories.
  2. System Configuration: Applies settings globally across all users on the system.

Using these configuration options with credential storage enables you to securely store Git credentials in a file, which Git will reference for every operation requiring authentication.

Steps to Set Up Persistent Git Credentials

Create a credentials file that will securely store your Git username and password.

  1. Open your terminal.
  2. Enter the following command to create a credentials file in your home directory:

    echo "https://<your-username>:<your-password>@<git-server-url>" > ~/.git-credentials
    

    Replace <your-username>, <your-password>, and <git-server-url> with your actual Git server details.
    Ensure the file path (~/.git-credentials) is correct; this will be used in later steps.
    You can set Custom path eg: /tmp/.git-credentials

  3. Configure Git to Use the Credentials File

    Next, use the git config command to tell Git where to find this credentials file.

    Using Global Configuration To set this up for the current user on all repositories:

    git config --global credential.helper "store --file ~/.git-credentials"
    

    This command saves the location of the credentials file in the Git configuration, so Git uses these credentials whenever it needs authentication.

    Using System Configuration To make this setting apply to all users on the system:

    sudo git config --system credential.helper "store --file /path/to/.git-credentials"
    

    Be sure to replace /path/to/.git-credentials with the path to your credentials file.

  4. Verifying the Setup and try to clone a repository that requires authentication:

    Use git config --list to verify git config.

    which should output based on level you set.

    credential.helper=store --file=/path/to/.git-credentials
    

    Now try to clone repository, this should clone without prompts for credentials.

    git clone https://<git-server-url>/<repository>
    

    If configured correctly, Git should not prompt for a username or password, as it will automatically pull these from the credentials file.

Benefits of Using Persistent Git Credentials

  1. Improved Productivity

    With credentials saved, you can focus entirely on development without repetitive prompts for authentication. This is especially beneficial when working across multiple repositories or making frequent pushes and pulls.

  2. Enhanced Workflow Efficiency

    By reducing the need for authentication interruptions, you streamline the coding and testing workflow, ultimately leading to faster development cycles.

  3. Reduced Risk of Credential Errors

    Centralized credential storage minimizes the likelihood of authentication errors, lockouts, or typos during login attempts.

  4. Better Security Control

    Storing credentials in a designated file enables easier control over security, as you know where your credentials are stored and can manage their permissions effectively.

    Security Considerations. Protect the Credentials File: Ensure your credentials file has restricted permissions (e.g., chmod 600 ~/.git-credentials) to prevent unauthorized access. Consider Credential Manager Options: For additional security, consider using Git credential managers like git-credential-manager or native OS keychain integrations for encrypted storage.

Docker

CMD Vs ENTRYPOINT

CMD and ENTRYPOINT are instructions used in Dockerfiles to define the command that will be run when a container is started. However, they serve different purposes and have distinct behaviors.

CMD Instruction

The CMD instruction in a Dockerfile sets the default command and/or parameters for the container. It provides defaults for an executing container, but these defaults can be overridden by specifying the command and parameters at runtime when the container is started.

FROM ubuntu:latest  
CMD ["echo", "Hello, World!"]  

In this example, if no command is specified when running the container, it will execute the default echo "Hello, World!". However, a user can override the CMD instruction by specifying a different command when running the container:

docker run my-image echo Goodbye, World!

ENTRYPOINT Instruction

The ENTRYPOINT instruction in a Dockerfile sets the main command to be run when the container starts. Unlike CMD, the ENTRYPOINT instruction does not allow for default parameters that can be overridden. Instead, any parameters specified at runtime are passed as arguments to the command defined in ENTRYPOINT.

FROM ubuntu:latest
ENTRYPOINT ["echo", "Hello, World!"]  

In this example, if no command is specified when running the container, it will execute the default echo "Hello, World!". However, if a user provides a command, it will be treated as arguments to the ENTRYPOINT:

docker run my-image "Goodbye, World!"

Docker-Squash

In this article, detailed explain about Image Layering and how to use docker-squash command to reduce the size of Image.

Automated Nginx Reverse Proxy for Docker

Dockerizer

Dockerizer is the concept to use Docker in more efficient way, so that developer and reuse the code and additional install packages as per dependency.

Reason for using Dockerizer:

  1. In Dockerfile each RUN command create new layer (which can create huge Image size while pushing to Registry).
  2. Dockerizer contains Ansible & Packer concept which then help to create Image more efficient way, installing required dependency/packages and making code reusability.

Reduce Docker Image Size

Kubernetes

Storage Class and Persistent Volume

Goodbye etcd, Hello PostgreSQL: Running Kubernetes with an SQL Database

Etcd is the brain of every Kubernetes cluster, the key-value storage keeping track of all the objects in a cluster. It's intertwined and tightly coupled with Kubernetes, and it might seem like an inseparable part of a cluster, or is it?

In this article it is explained how we could replace etcd with PostgreSQL database, as well as why and when it might make sense to do so.

Migrate data from one PVC to other (this can done within same Namespace)

Well, for hosting any web applications or storing output files we need some kind of dataStorage. At some point our local storage wont be efficient approach when it comes to Prod Version & for multiple user.

Thanks to Cloud Service Companies, that provides the data-storage here there are many Storageclass available from where we can store and retrieve our data. Some of the StorageClass as AzureFile, AzureBlob, net-trident-nfs.

Infact, backup and mounting data from one storage to Storage, has became a easy job todo.

Here is the simple code snippet to create a StorageClass, PVC

  1. Create StorageClass yaml

    kind: StorageClass
    apiVersion: storage.k8s.io/v1beta1
    metadata:
        name: storageclassname
    provisioner: csi.trident.netapp.io
    parameters:
        resourceGroup: resourcegrpname #if required
        snapshots: 'false'             #if required
    reclaimPolicy: Retain
    volumeBindingMode: Immediate
    
  2. Create PVC pointing to storage class

    kind: PersistentVolumeClaim
    apiVersion: v1
    metadata:
        name: pvcname
    specs:
        accessModes:
            - ReadWriteMany
        volumeMode: Filesystem
        resources:
            requests:
                storage: 10Gi
        storageClassName: name-of-storageclass
        volumeMode: Filesystem
    
  3. To copy data to new StorageClass we need to create a new PVC pointing to newStorageClass, the above PVC yaml snippets can be helpful to create new PVC

  4. Once PVC gets create, nxt is to start copying PVC by deploying helper job. Here we need to mention two PVC name for copying data from src to destination in Job

  5. Helper Job yaml file for copying data ( in this Job we need to mention to folder path within the pod to copy files one PVC to other)

    apiVersion: batch/v1
    kind: Job
    metadata:
        name: job-name
    spec:
        parallelism: 1
        completions: 1
        activeDeadlineSeconds: 1800
        backoffLimit: 5
        template:
            metadata:
            labels:
                app: job-name
            spec:
                volumes:
                    - name: src
                    persistentVolumeClaim:
                        claimName: srcPVC-name  #from where data need to copy
                    - name: dst
                    persistentVolumeClaim:
                        claimName: dstPVC-name  #data to be copied
                containers:
                - name: copy-data
                image: ubuntu/busybox
                command: ["/bin/bash","-c"]
                args: ["cp -R /src/* /dst/"]  # using cp command
                args: ["rsync -a --progress --dry-run /mnt/src/ /mnt/dst/; echo 'will sleep now for 120 seconds. To stop process delete job..'; sleep 120; rsync -a --progress /mnt/src/ /mnt/dst/; echo 'rsync process fininshed'"]        #using rsync 
                volumeMounts:
                    - name: src
                    mountPath: "/mnt/src"
                    - name: dst
                    mountPath: "/mnt/dst"
                restartPolicy: OnFailure
    
  6. To execute the job oc apply -f job.yaml

Fetch secrets from Az-KeyVault to use secrets in Pods

Secrets key plays a vital role when its comes to use credentials for authentication purpose and various implement.

Here Azure-KeyVault is one of the best service for (Iaas,Saas,Paas) , using Az we can also store secret values.

Azure Key Vault provider for Secrets Store CSI Driver allows you to get secret contents stored in an Azure Key Vault instance and use the Secrets Store CSI driver interface to mount them into Kubernetes pods.

Following steps mentioned about fetching KV from Azure

##add helm repo for Secrets Store CSI Driver and the Azure Keyvault Provider
helm repo add csi-secrets-store-provider-azure https://azure.github.io/secrets-store-csi-driver-provider-azure/charts

# deploy the secret-store-csi-driver and Azure KV Provider
helm install csi csi-secrets-store-provider-azure/csi-secrets-store-provider-azure

Note: The helm charts hosted in Azure/secrets-store-csi-driver-provider-azure repo include the 
Secrets Store CSI Driver helm charts as a dependency. Running the above helm install command
will install both the Secrets Store CSI Driver and Azure Key Vault provider

# ensure driver and provider pods are running
kubectl get pods

#if using service principal connection (Configure Service Principal to access Keyvault)
Add your service principal credentials as a Kubernetes secrets

oc create secret generic secrets-store-creds --from-literal clientid=<service_principal_client_id>

or deploy by using yaml

kind: Secret
apiVersion: v1
metadata:
    name: service-principal
    lables:
        #update labels
data:
    clientid:
    clientsecret:
type: Opaque

# secret class provider yaml
apiVersion: secrets-store.csi.x-k8s.io/v1
kind: SecretProviderClass
metadata:
    name: azure-kv
spec:
provider: azure
parameters:
    usePodIdentity: "false"               # [OPTIONAL] if not provided, will default to "false"
    useVMManagedIdentity: "false"         # [OPTIONAL available for version > 0.0.4] if not provided, will default to "false"
    userAssignedIdentityID: "client_id"   # [OPTIONAL available for version > 0.0.4] use the client id to specify which user assigned managed identity to use. If using a user assigned identity as the VM's managed identity, then specify the identity's client id. If empty, then defaults to use the system assigned identity on the VM
    clientID: "client_id"                 # [OPTIONAL available for version > 1.1.0] client id of the Azure AD Application or managed identity to use for workload identity
    keyvaultName: "kvname"                # the name of the KeyVault
    cloudName: ""                         # [OPTIONAL available for version > 0.0.4] if not provided, azure environment will default to AzurePublicCloud
    cloudEnvFileName: ""                  # [OPTIONAL available for version > 0.0.7] use to define path to file for populating azure environment
    objects:  |
    array:
        - |
        objectName: secret1
        objectAlias: SECRET_1           # [OPTIONAL available for version > 0.0.4] object alias
        objectType: secret              # object types: secret, key or cert. For Key Vault certificates, refer to https://azure.github.io/secrets-store-csi-driver-provider-azure/configurations/getting-certs-and-keys/ for the object type to use
        objectVersion: ""               # [OPTIONAL] object versions, default to latest if empty
        objectVersionHistory: 5         # [OPTIONAL] if greater than 1, the number of versions to sync starting at the specified version.
        filePermission: 0755                # [OPTIONAL] permission for secret file being mounted into the pod, default is 0644 if not specified.
        - |
        objectName: key1
        objectAlias: ""                 # If provided then it has to be referenced in [secretObjects].[objectName] to sync with Kubernetes secrets 
        objectType: key
        objectVersion: ""
    tenantID: "tid"                       # the tenant ID of the KeyVault

# deploy pod
kind: Pod
apiVersion: v1
metadata:
    name: demo-pod
spec:
    containers:
    - image: nginx
        name: nginx
    volumeMounts:
    - name: secrets-store-inline
    mountPath: "/mnt/secrets-store"
    readOnly: true
    volumes:
        - name; secrets-store-inline
        csi:
            driver: secrets-store.csi.k8s.io
            readOnly: true
            volumeAttributes:
                secretProvider: "azure-kv"
            nodePublishSecretRef:              #only required if using service principal          
                name: "secret-yaml-metadata-name" #only required if using service principal 
(note: didnt specified commands for pod, pod will completed as soon as hosted)

Deploy pod

kubectl apply -f pod.yaml

# check pod status
kubectl get pods

# show secrets held in secrets-store
kubectl exec "pod-name" -- ls /mnt/secrets-store/

# print a test secret held in secrets-store
kubectl exec "pod-name" -- cat /mnt/secrets-store/secret1

Volume Snapshot

Volume snapshot using Openshift, this feature assist to create a snap of volume in given time, so that those volume can utilised for test/prod by specifying the volumesnapshot name

Following are steps to create Snapshot using Openshift

  1. select PVC for which you want to take snapshot, click on the options and select "create Snapshot"

    Volumesnap1

  2. Select the "VolumeSnapshotClass" (will be provided by Openshift)

    note : for creating volumeSnapshot, a VolumeSnapshotClass should be available.

    Volumesnap2

  3. Select "Create" Volumesnap3

  4. After successful creation of snapshots, verify it by selecting VolumeSnapshots Volumesnap4

  5. now to restore the volumeSnapshot, create a new PVC (provided in options). Volumesnap5

  6. select the StorageClass for PVC Volumesnap6

  7. after successful creation of PVC , verify it by selecting PersistentVolumeClaims Volumesnap8

  8. now to use volume create by VolumeSnapshot, update the PVC name to pod, which is created using VolumeSnapshot. Volumesnap9

Deployment rollout strategies

tutorial link

byte-byte go link

source-code link

HPA vs KEDA

To share these hard-earned lessons with you. In this article, we're going to dissect HPA and KEDA, compare their strengths and weaknesses, and dive into real-world scenarios. My goal is to arm you with the knowledge to make informed decisions right from the get-go, so you know exactly when to use HPA and when to switch gears to KEDA.

  • What is HPA?

    HPA automatically adjusts the number of pod replicas in a deployment or replica set based on observed metrics like CPU or memory usage. You set a target—like 70% CPU utilization—and HPA does the rest, scaling the pods in or out to maintain that level. It's like putting your scaling operations on cruise control.

  • Why Was HPA Devised?

    Back in the day, before the cloud-native era, scaling was often a manual and painful process. You'd have to provision new servers, configure them, and then deploy your application. This was time-consuming, error-prone, and not very agile.

    When Kubernetes came along, it revolutionized how we think about deploying and managing applications. But Kubernetes needed a way to handle automatic scaling to truly make the platform dynamic and responsive to the actual needs of running applications. That's where HPA comes in.

    Simplicity: HPA is designed to be simple and straightforward. You don't need a Ph.D. in distributed systems to set it up. Just specify the metric and the target, and you're good to go.

    Resource Efficiency: Before autoscaling, you'd often over-provision resources to handle potential spikes in traffic, which is wasteful. HPA allows you to use resources more efficiently by scaling based on actual needs.

    Operational Ease: With HPA, the operational burden is reduced. You don't have to wake up in the middle of the night to scale your application manually; HPA has got your back.

    Built-In Metrics: Initially, HPA was designed to work with basic metrics like CPU and memory, which are often good enough indicators for many types of workloads.

    So, in a nutshell, HPA was devised to make life easier for DevOps folks like us, allowing for more efficient use of resources and simplifying operational complexities. It's like the Swiss Army knife of Kubernetes scaling for straightforward use-cases. What do you think? Want to dive deeper into any aspect of HPA?

    So... When to Use HPA? Predictable Workloads: If you're dealing with an application that has a fairly predictable pattern—like a web app that gets more traffic during the day and less at night—HPA is a solid choice. You can set it to scale based on CPU or memory usage, which are often good indicators of load for these types of apps.

    Simple Metrics: HPA is great when you're looking at straightforward metrics like CPU and memory. If you don't need to scale based on more complex or custom metrics, HPA is easier to set up and manage.

    Quick Setup: If you're in a situation where you need to get autoscaling up and running quickly, HPA is your friend. Being a native Kubernetes feature, it's well-documented and supported, making it easier to implement.

    Stateless Applications: HPA is particularly well-suited for stateless applications where each pod is interchangeable. This makes it easier to scale pods in and out without worrying about maintaining state.

    Built-In Kubernetes Support: Since HPA is a built-in feature, it comes with the advantage of native integration into the Kubernetes ecosystem, including monitoring and logging through tools like Prometheus and Grafana.

  • What is KEDA?

    KEDA stands for Kubernetes Event-Driven Autoscaling. Unlike HPA, which is more about scaling based on system metrics like CPU and memory, KEDA is designed to scale your application based on events. These events could be anything from the length of a message queue to the number of unprocessed database records.

    KEDA works by deploying a custom metric server and custom resources in your Kubernetes cluster. It then integrates with various event sources like Kafka, RabbitMQ, Azure Event Hubs, and many more, allowing you to scale your application based on metrics from these systems.

  • Why Was KEDA Devised?

    Event-Driven Architectures: Modern applications are increasingly adopting event-driven architectures, where services communicate asynchronously through events. Traditional autoscalers like HPA aren't designed to handle this kind of workload.

    Complex Metrics: While HPA is great for simple metrics, what if you need to scale based on the length of a Kafka topic or the number of messages in an Azure Queue? That's where KEDA comes in.

    Zero to N Scaling: One of the coolest features of KEDA is its ability to scale your application back to zero when there are no events to process. This can lead to significant cost savings.

    Extensibility: KEDA is designed to be extensible, allowing you to write your own scalers or use community-contributed ones. This makes it incredibly flexible and adaptable to various use-cases.

    Multi-Cloud and On-Premises: KEDA supports a wide range of event sources, making it suitable for both cloud and on-premises deployments.

    The Gap that KEDA Fills Over HPA

    While HPA is like your reliable sedan, KEDA is more like a tricked-out sports car with all the bells and whistles. It was devised to fill the gaps left by HPA, particularly for applications that are event-driven or that require scaling based on custom or external metrics.

    So, if you're dealing with complex, event-driven architectures, or if you need to scale based on metrics that HPA doesn't support out of the box, KEDA is your go-to. It's like the next evolution in Kubernetes autoscaling, designed for the complexities of modern, cloud-native applications.

Real-World Scenarios

Real Cases for Using HPA Over KEDA
  1. Basic Web Application

    Scenario: You're running a simple web application that serves static content and has predictable spikes in traffic, like during a marketing campaign.

    In this case, the scaling needs are straightforward and based on CPU or memory usage. HPA is easier to set up and manage for this kind of scenario. You don't need the event-driven capabilities that KEDA offers.

  2. Internal Business Application

    Scenario: You have an internal application used by employees for tasks like data entry, which sees higher usage during business hours and lower usage otherwise.

    Again, the load pattern is predictable and can be managed easily with simple metrics like CPU and memory. HPA's native integration with Kubernetes makes it a straightforward choice, without the need for the more complex setup that KEDA might require.

  3. Stateless Microservices

    Scenario: You're running a set of stateless microservices that handle tasks like authentication, logging, or caching. These services have a consistent load and don't rely on external events.

    These types of services often scale well based on system metrics, making HPA a good fit. Since they're stateless, scaling in and out is less complex, and HPA can handle it easily.

  4. Traditional RESTful API

    Scenario: You have a RESTful API that serves mobile or web clients. The API has a steady rate of requests but might experience occasional spikes.

    In this case, you can set up HPA to scale based on request rates or CPU usage, which are good indicators of load for this type of application. KEDA's event-driven scaling would be overkill for this scenario.

  5. Why Choose HPA in These Cases?

    Simplicity: HPA is easier to set up and manage for straightforward scaling needs. If you don't need to scale based on complex or custom metrics, HPA is the way to go.

    Native Support: Being a built-in Kubernetes feature, HPA has native support and a broad community, making it easier to find help or resources.

    Resource Efficiency: For applications with predictable workloads, HPA allows you to efficiently use your cluster resources without the need for more complex scaling logic.

    Operational Ease: HPA requires less ongoing maintenance and has fewer components to manage compared to KEDA, making it a good choice for smaller teams or simpler applications.

Real Cases for Using KEDA Over HPA
  1. Event-Driven ML Inference

    Scenario: You have a machine learning application for real-time fraud detection. Transactions are events funneled into an AWS SQS queue.

    Why KEDA Over HPA: With KEDA, you can dynamically adjust the number of inference pods based on the SQS queue length, ensuring timely fraud detection. HPA's system metrics like CPU or memory wouldn't be as effective for this use-case.

  2. IoT Data Processing

    Scenario: Your IoT application collects sensor data that's sent to an Azure Event Hub for immediate processing.

    Why KEDA Over HPA: Here, KEDA's strength lies in its ability to adapt to the number of unprocessed messages in the Azure Event Hub, ensuring real-time data processing. Traditional HPA scaling based on CPU or memory wouldn't be as responsive to these event-driven requirements.

  3. Real-time Chat Application

    Scenario: You manage a chat application where messages are temporarily stored in a RabbitMQ queue before being delivered to users.

  4. Why KEDA Over HPA?

    KEDA excels in this scenario by dynamically adjusting resources based on the RabbitMQ queue length, ensuring prompt message delivery. This is a level of granularity that HPA, with its focus on system metrics, can't offer.

    Stream Processing with Kafka

    Scenario: Your application consumes messages from a Kafka topic, and the rate of incoming messages can fluctuate significantly.

    Why KEDA Over HPA: In this case, KEDA's ability to scale based on the Kafka topic length allows it to adapt to varying loads effectively. HPA, which isn't designed for such custom metrics, wouldn't be as agile.

  5. Why Choose KEDA in These Cases?

    Event-Driven Flexibility: KEDA is tailored for scenarios where system metrics aren't the best indicators for scaling, offering a more nuanced approach.

    Custom Metrics Support: Unlike HPA, KEDA can interpret a wide range of custom metrics, making it versatile for complex scaling needs.

    Resource Optimization: KEDA's ability to scale down to zero pods when idle can lead to significant cost savings.

    Adaptability: The platform's extensible design allows for custom scalers, making it adaptable to a wide range of use-cases.

Conclusion

So there you have it, folks! We've journeyed through the world of Kubernetes autoscaling, dissecting both HPA and KEDA to understand their strengths, limitations, and ideal use-cases. From my early days of being enamored with HPA's simplicity to discovering the event-driven magic of KEDA, it's been a ride full of lessons.

If you're dealing with predictable workloads and need a quick, straightforward solution, HPA is your reliable workhorse. It's like your trusty old hammer; it might not have all the bells and whistles, but it gets the job done efficiently.

On the flip side, if your application lives in the fast-paced realm of event-driven architectures or requires scaling based on custom metrics, KEDA is your Swiss Army knife. It's built for the complexities and nuances of modern, cloud-native applications.

Remember, choosing between HPA and KEDA isn't about which is better overall, but which is better for your specific needs. So take stock of your application's requirements, your team's expertise, and your long-term scaling strategy before making the call.

As you venture into your next Kubernetes project, I hope this guide serves as a useful roadmap for your autoscaling decisions. And hey, since you're all about diving deeper, maybe explore setting up these autoscaling strategies in a hands-on way. Trust me, there's no better teacher than experience.

CICD deployment architecture

CICD deployment