• yq: Extracting Objects from Kubernetes Manifests

    1 min read

    yq Kubernetes YAML Secret manifest extraction

    When working with Kubernetes manifests that contain multiple resources, you might need to extract specific objects out of a large document. The yq command-line tool provides powerful filtering capabilities to select and extract individual resources from multi-document YAML files.

    In this post, we'll explore how to use yq's select function to do that.

    23/06/2025

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  • kubectl: Streaming Logs from Multiple Pods

    2 min read

    kubectl logs Kubernetes Pod streaming troubleshooting

    When troubleshooting applications in Kubernetes, you often need to monitor logs from multiple pods simultaneously. The kubectl logs command provides powerful options to stream logs from several pods at once using label selectors.

    In this post, we'll explore how to use kubectl logs with the selector flag to monitor multiple pods in real-time.

    15/05/2025

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  • Installing Linkerd with Helm

    6 min read

    Kubernetes Linkerd Helm

    Linkerd is a service mesh that provides observability, reliability, and security for your Kubernetes applications. We can choose to install Linkerd using helm or it's linkerd CLI tool, which is a more hands-on way of achieving the same.

    Since in the linkerd documentations is explicitly recommending to use helm for production environments, we are going to do exactly that.

    19/03/2025

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  • Argo Rollouts: Canary deployments

    7 min read

    Kubernetes Argo Rollouts Canary

    A canary deployment is a technique to reduce the risk of introducing a new version of a software application in production by slowly rolling out the change to a small subset of users before rolling it out to the entire infrastructure. If any issue is detected on the "canary", the deployment can be stopped, and the rest of the users won't be affected. With Argo Rollouts, we can easily implement this strategy.

    18/03/2025

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  • Argo Rollouts: Blue-Green deployments

    8 min read

    Kubernetes Argo Rollouts blue-green

    Argo Rollouts is a Kubernetes controller and set of CRDs for progressive delivery. It can be used to orchestrate blue-green deployments, canary releases, and rollouts. We are going to take a look at how to use Argo Rollouts to perform a blue-green deployment.

    17/03/2025

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Kubernetes:
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yq kubectl Linkerd Argo Rollouts Rollouts Capsule Pod MutatingAdmissionPolicy MutatingAdmissionPolicyBinding kind plugin custom command Argo Workflows CronWorkflow StatefulSet Workflow Kaniko WorkflowTemplate install kubernetes security Pod Security Standards port-forward socat operator-sdk golang Pushgateway RBAC Rule troubleshooting APIRequestCount affinity topologySpreadConstraints Route ExternalSecret Secret jsonpath ServiceAccount Ingress k3s letsencrypt tcpdump ssh CRD additionalPrinterColumns Velero query PV Operator Role ClusterRole web-console operator oc-mirror Secrets Manager tekton context Policy enforcement Rules Project ConfigMap Environment ROSA IngressRoute redirect RDS psql API server S3 patch file apply selector minikube arm64 colima EKS-connector SecurityContextConstraint SecretStore scripting CRC credentials Deployment valueFrom setup helm StorageClass tagging EBS externalDNS ALB HPA convert API version example shipwright ECR imagePullSecrets ENI subnet krew blame cloud provider etcd availability zones CoreDNS backend state podAntiAffinity Composite images GKE activeDeadlineSeconds Job lifetime bestby IRSA label annotation PersistentVolume Volume fsGroup vpa cluster autoscaler Karpenter provider kubernetes_manifest fsGroupChangePolicy container escape spot instances termination handler persistentVolumeReclaimPolicy fieldPath upgrade privileged network NetworkPolicy bash ps longhorn ASCP QoD raspberry pi drain evict uncordon kubeconfig config view logs admission controller hook postStart preStop deprecations gp3 get-all taints securityGroup probe readinessProbe livenessProbe tolerations explain MutatingWebhook startupProbe RollingUpdate Recreate PDB emptyDir netstat ss autoscale Kubeconfig initContainers DNS tree DaemonSet stern tail LimitRange resource limits restartPolicy system-upgrade-controller rolling update history undo Volumes awsElasticBlockStore change-cause set image imperative hostAliases imagePullPolicy metrics-server Service overlay agent nodes declarative ELB HTTPS alpine package nodeSelector scheduler kubie api-versions events multiple containers SecretKeyRef ReplicaSet NodePort Pod restart rollout deployment nginx-contoller ValidatingWebhookConfiguration error recovery httpHeaders uid securityContext exec interactive LoadBalancer IAM scale replicas nodeName externalName namespace Cronjob multinode template yaml unused-volumes diff