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Rewrote the whole website to get rid on a heavy theme

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Julien Dessaux 2021-03-11 18:53:14 +01:00
parent 3ea54810ad
commit 60d3abc6ec
122 changed files with 346 additions and 2558 deletions
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5
content/blog/kubernetes/_index.md Normal file
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---
title: "Kubernetes"
linkTitle: "Kubernetes"
weight: 40
---

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title: "Get tls certificate and key from a kubernetes secret"
date: 2020-08-06
---
My use case is to deploy a wildcard certificate that was previously handled by an acme.sh on my legacy lxd containers. Since moving to kubernetes parts of my services I have been using cert-manager to issue letsencrypt certificates. Since I am not done yet I looked into a way of getting a certificate out of kubernetes. Assuming we are working with a secret named `wild.adyxax.org-cert` and our namespace is named `legacy` :
{{< highlight sh >}}
kubectl -n legacy get secret wild.adyxax.org-cert -o json -o=jsonpath="{.data.tls\.crt}" | base64 -d > fullchain.cer
kubectl -n legacy get secret wild.adyxax.org-cert -o json -o=jsonpath="{.data.tls\.key}" | base64 -d > adyxax.org.key
{{< /highlight >}}

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title: "Dump and restore a postgresql database on kubernetes"
linkTitle: "Dump and restore a postgresql database"
date: 2020-06-25
---
## Dumping
Assuming we are working with a postgresql statefulset, our namespace is named `miniflux` and our master pod is named `db-postgresql-0`, trying to
dump a database named `miniflux`:
{{< highlight sh >}}
export POSTGRES_PASSWORD=$(kubectl get secret --namespace miniflux db-postgresql -o jsonpath="{.data.postgresql-password}" | base64 --decode)
kubectl run db-postgresql-client --rm --tty -i --restart='Never' --namespace miniflux --image docker.io/bitnami/postgresql:11.8.0-debian-10-r19 --env="PGPASSWORD=$POSTGRES_PASSWORD" --command -- pg_dump --host db-postgresql -U postgres -d miniflux > miniflux.sql-2020062501
{{< /highlight >}}
## Restoring
Assuming we are working with a postgresql statefulset, our namespace is named `miniflux` and our master pod is named `db-postgresql-0`, trying to
restore a database named `miniflux`:
{{< highlight sh >}}
kubectl -n miniflux cp miniflux.sql-2020062501 db-postgresql-0:/tmp/miniflux.sql
kubectl -n miniflux exec -ti db-postgresql-0 -- psql -U postgres -d miniflux
miniflux=# \i /tmp/miniflux.sql
kubectl -n miniflux exec -ti db-postgresql-0 -- rm /tmp/miniflux.sql
{{< /highlight >}}