legmac

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-certmanager-solver
  namespace: kasten
spec:
  ingress:
  - from:
    - namespaceSelector: {}
  podSelector:

legmac

https://www.digitalocean.com/community/questions/how-do-you-clone-a-persistentvolumeclaim-in-kubernetes
https://kubernetes.io/docs/concepts/storage/volume-snapshots/
https://kubernetes.io/docs/concepts/storage/persistent-volumes/#volume-snapshot-and-restore-volume-from-snapshot-support



https://www.youtube.com/watch?v=bo21p0c7j9o
https://github.com/HoussemDellai/docker-kubernetes-course/tree/main/14_cluster_backup

legmac

https://dba.stackexchange.com/questions/154464/mongodb-replication-going-into-maintenance-mode-with-10333-other-maintenance-mo
// db.adminCommand({replSetMaintenance: 1})
[ReplicationExecutor] going into maintenance mode with 0 other maintenance mode tasks in progress
[ReplicationExecutor] transition to RECOVERING

// db.adminCommand({replSetMaintenance: 1})
[ReplicationExecutor] going into maintenance mode with 1 other maintenance mode tasks in progress

// db.adminCommand({replSetMaintenance: 0})
[ReplicationExecutor] leaving maintenance mode (1 other maintenance mode tasks ongoing)

legmac

kubectl delete sts sts --cascade=false # keep pods running
kubectl -f sts.yaml create


kubectl patch pvc sts-sts-0 -p '{ "spec": { "resources": { "requests": { "storage": "15Gi" }}}}'
https://itnext.io/k8s-raise-statefulset-volume-size-with-low-impact-33fe1e2576f6

legmac

package problem;

import com.tietoevry.quarkus.resteasy.problem.HttpProblem;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.core.Response;

@Path("/hello")
public class HelloResource {

legmac

#echo $totalmem
totalmempro=$(printf "%.0f\n" $totalmem)
echo Total Memory in Gb = $totalmempro
memusage=$(free | awk '/Mem/{printf("RAM Usage: %.2f%\n"), $3/$2*100}' |  awk '{print $3}')
echo Memory Usage in %  = $memusage
memfree=$(free -mh | sed -n 2p | awk '{print $4}' | sed 's/\G//g')
echo Memory free in Gb = $memfree

legmac

bitnami/nginx-ingress-controller
https://github.com/bitnami/charts/tree/master/bitnami/nginx-ingress-controller


helm install nginx-ingress stable/nginx-ingress --set controller.publishService.enabled=true

#https://bobcares.com/blog/nginx-ingress-on-digitalocean-kubernetes-using-helm/

kubectl describe -A ValidatingWebhookConfiguration ingress-nginx-admission > ValidatingWebhookConfiguration.yaml
 kubectl delete -A ValidatingWebhookConfiguration ingress-nginx-admission

legmac

Packages:

• apm.k8s.elastic.co/v1alpha1
• common.k8s.elastic.co/v1alpha1
• elasticsearch.k8s.elastic.co/v1alpha1

legmac

//https://stackoverflow.com/questions/18731603/how-to-tar-certain-file-types-in-all-subdirectories
find ./someDir -name "*.php" -o -name "*.html" | tar -cf my_archive -T -


Easy with zsh:
tar cvzf foo.tar.gz **/*.(php|html)

legmac

jenkins:
  systemMessage: "Welcome to Jenkins "

jobs:
  - script: >
      pipelineJob('configuration-as-code') {}
      
unclassified:
  location:
    url: "http://localhost:8080/"