Category: Kubernetes

  • Getting a count of active connections in PostgreSQL

    While working on my latest project in Rust with Diesel I ran into an issue when sharing a Postgres instance between two applications. The second application (in my case, Ory Kratos) was unable to establish connections to the database, telling me that there were no available connections. At first I thought maybe my Postgres database […]

  • Run a bash shell in Kubernetes Cluster

    This is really simple. Use the kubectl run command to run a container quickly: In my case I wanted to install some tools (which since it’s an ubuntu image you can!) Or if you just need curl (and some other network diagnostic tools):

  • Removing url prefixes in nginx Kubernetes Ingress

    Getting an NGINX ingress running on a cluster is really easy, but the documentation did not immediately tell me how to strip the path prefix off at the ingress. I know I can use something like Istio to do this for me but for this specific project I didn’t need all of the additional complexity […]

  • Run a plain SQL query in Diesel.rs

    Sometimes I just need to get a single value out of the database, or in this case I wanted to include connectivity to the database in my liveness probe. Since I don’t need to load anything and just want to make sure the database is accessible I want to run a very simple query. Diesel […]