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OpenShift 3.11 - custom default route certificate failing with certificate has expired or is not yet valid
2 min read
After trying to set a custom default certificate for the OpenShift routes we might see how it's Pods starts crashing:
$ kubectl get pods NAME READY STATUS RESTARTS AGE router-10-rh8vf 1/1 Running 0 32m router-10-f2dt2 0/1 CrashLoopBackOff 6 7m router-10-m45b7 1/1 Running 0 31mChecking it's logs we'll get a quite misleading message:
$ kubectl logs router-10-f2dt2 -n default Error from server: Get https://some.openshift.cluster:10250/containerLogs/default/router-10-f2dt2/router: x509: certificate has expired or is not yet valid04/07/2023
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ExternalSecret: Partially load a secret
2 min read
Sometimes we might have a secret stored in the AWS Secrets Manager with multiple properties but we don't really need all the data stored in the secret. We can tell External Secrets Operator to use just a specific key instead of using the whole secret.
13/06/2023
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Add new line when printing data using jsonpath
2 min read
When we print values using jsonpath we'll get all the values in a single line (actually, it won't even bother adding the newline character at the end of the list):
$ kubectl get ns -o jsonpath='{ .items[*].metadata.name }' default dynamodb-operator ec2-operator iam-operator kube-node-lease kube-public kube-system local-path-storage testvault06/06/2023
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Set the default container for kubectl
2 min read
One of the many improvements we get in Kubernetes 1.27 is the ability to set what's the default container:
apiVersion: v1 kind: Pod metadata: name: multi-container-pod spec: containers: - image: alpine:latest name: one command: - sh - -c - 'while true; do echo one; sleep 1m; done' - image: alpine:latest name: two command: - sh - -c - 'while true; do echo two; sleep 2m; done' - image: alpine:latest name: three command: - sh - -c - 'while true; do echo tree; sleep 3m; done'01/06/2023
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Managing Environment Variables with kubectl
2 min read
In today's highly dynamic and containerized environments, managing environment variables is crucial for configuring applications effectively. With the Kubernetes command-line tool, kubectl, you can imperatively set or remove environment variables for your existing objects.
21/05/2023
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Kubernetes:
container orchestration
