kubelogin VS stern

Authenticating with Kyma is a (in my opinion) unnecessary challenge as it leverages the OIDC-login plugin for kubectl. You find a description of the setup here. This works fine when on a Mac but can give you some headaches on a Windows and on Linux machine especially when combined with restrictive setups in corporate environments. For Windows I can only recommend installing krew via chocolatey and then install the OIDC plugin via kubectl krew install oidc-login. At least for me that was the only way to get this working on Windows.

It is sort of a roundabout way, but I sync Active Directory to a Keycloak realm, then use OIDC auth with kube-oidc-proxy (https://github.com/jetstack/kube-oidc-proxy) and kubelogin (https://github.com/int128/kubelogin) for OIDC-based auth to the api server.

Yes, I setup a cluster with no SPFs. That means an HA setup for the external load balancer. I use HAProxy for my ELB, and setup 2 instances with a VRRP + keepalived to provide HA to the ingress controller. I run the control plane private, accessible only from localhost. I setup kube-oidc-proxy (https://github.com/jetstack/kube-oidc-proxy) to expose the API server with single sign-on on the ingress controller, and use the kubelogin plugin (https://github.com/int128/kubelogin) to provide OIDC support to kubectl. I then setup Keycloak to handle OIDC/OAuth2/SAML and syncing to Active Directory, and setup groups in Active Directory to control acccess to clusters. Devs each get their own namespace in the dev cluster, with mostly cluster-admin access to their namespace. Staging/Prod clusters are locked down, with read-only access to devs. Thanks to the OIDC auth to the APIServer, when employees are onboarded & offboarded, we only need to add/remove them from groups in Active Directory and everything else just magically syncs.

I've successfully configured kube-apiserver to authenticate users through oidc (https://github.com/int128/kubelogin) so all the users from my keycloak realm can access to the cluster with their credentials.

Link to GitHub Repository

kubelogin (helper for k8s build in OIDC support)

I use the kube-login plugin for kubectl (https://github.com/int128/kubelogin) along with the kube-oidc-proxy (https://github.com/jetstack/kube-oidc-proxy), using Keycloak as my OIDC provider (https://www.keycloak.org) and doing LDAP synchronization to Active Directory.

Dex oauth and kubelogin. We happen to use google auth in our org, but dex is pretty flexible. You only have to have a way to distribute server certificates. We then have documented script commands to pull certs and create kubectl fig files. OpenUnison always looked interesting, but dex has been good enough for our uses.

With a working dex/OIDC configuration, you could use: https://github.com/int128/kubelogin

deploy: stage: deploy image: alpine/k8s:1.29.1 variables: NAMESPACE: $CI_COMMIT_REF_SLUG before_script: # init namespace - kubectl config use-context $KUBE_CONTEXT - kubectl create namespace $NAMESPACE || true # download tools - curl --show-error --silent --location https://github.com/stern/stern/releases/download/v1.22.0/stern_1.22.0_linux_amd64.tar.gz | tar zx --directory /usr/bin/ stern && chmod 755 /usr/bin/stern && stern --version - curl --show-error --silent --location https://github.com/kubernetes/kompose/releases/download/v1.32.0/kompose-linux-amd64 -o /usr/local/bin/kompose && chmod a+x /usr/local/bin/kompose && kompose version # show logs asynchronously. Timeout to avoid hanging indefinitely when an error occurs in script section - timeout 1200 stern -n $NAMESPACE "app-" --tail=0 --color=always & # in background, tail new logs if any (current and incoming) pod with this regex as name - timeout 1200 kubectl -n $NAMESPACE get events --watch-only & # in background, tail new events in background script: # first delete CrashLoopBackOff pods, polluting logs - kubectl -n $NAMESPACE delete pod `kubectl -n $NAMESPACE get pods --selector app.kubernetes.io/component=$MODULE | awk '$3 == "CrashLoopBackOff" {print $1}'` || true # now deploying - kompose convert --out k8s/ - kubectl apply -n $NAMESPACE -f k8s/ - echo -e "\e[93;1mWaiting for the new app version to be fully operational...\e[0m" # waiting for successful deployment - kubectl -n $NAMESPACE rollout status deploy/app-db - kubectl -n $NAMESPACE rollout status deploy/app-back - kubectl -n $NAMESPACE rollout status deploy/app-front # on any error before this line, the script will still wait for these threads to complete, so the initial timeout is important. Adding these commands to after_script does not help - pkill stern || true - pkill kubectl || true after_script: # show namespace content - kubectl config use-context $KUBE_CONTEXT - kubectl -n $NAMESPACE get deploy,service,ingress,pod

The old repo is dead

node-and-git: image: node:18.10-alpine before_script: - apk --no-cache add git kubectl-and-stern: image: alpine/k8s:1.22.13 before_script: # install stern - curl --show-error --silent --location https://github.com/stern/stern/releases/download/v1.22.0/stern_1.22.0_linux_amd64.tar.gz | tar zx --directory /usr/bin/ stern && chmod 755 /usr/bin/stern playwright-and-kubectl: image: mcr.microsoft.com/playwright:v1.35.1-focal before_script: # install kubectl - curl --show-error --silent --location --remote-name https://storage.googleapis.com/kubernetes-release/release/v1.25.3/bin/linux/amd64/kubectl && chmod +x ./kubectl && mv ./kubectl /usr/local/bin/

I'll add stern (https://github.com/stern/stern) to that - follow logs from multiple pods easily.

Multi pod and container log tailing for Kubernetes https://github.com/stern/stern

stern v1.22.0

Link to GitHub Repository

If you are using Kubernetes, I highly recommend using https://github.com/stern/stern

Stern: https://github.com/stern/stern for log streaming