Connecting to the Postgres Database

To connect to the Postgres Database, you will need the following values: * database name * username * password * database host * database port * database CA certificate

1. To obtain the database name, username, password, and CA cert, run the following commands:

   db_name=$(kubectl get secret postgres-db-secret -n metadata-store -o json | jq -r '.data.POSTGRES_DB' | base64 -d)
   db_username=$(kubectl get secret postgres-db-secret -n metadata-store -o json | jq -r '.data.POSTGRES_USER' | base64 -d)
   db_password=$(kubectl get secret postgres-db-secret -n metadata-store -o json | jq -r '.data.POSTGRES_PASSWORD' | base64 -d)
   
   db_ca_dir=$(mktemp -d -t ca-cert-XXXX)
   db_ca_path="$db_ca_dir/ca.crt"
   kubectl get secrets postgres-db-tls-cert -n metadata-store -o json | jq -r '.data."ca.crt"' | base64 -d > $db_ca_path
   

   If the password was auto-generated, the above password command will return an empty string. Instead, run the following command:

   db_password=$(kubectl get secret postgres-db-password -n metadata-store -o json | jq -r '.data.DB_PASSWORD' | base64 -d)
   

2. In a separate terminal, run the following command:

   kubectl port-forward service/metadata-store-db 5432:5432 -n metadata-store
   

   Set the database host and port values on the first terminal with the following:

   db_host="localhost"
   db_port=5432
   

   To port forward to a different local port number, use the following command template:

   kubectl port-forward service/metadata-store-db <LOCAL_PORT>:5432 -n metadata-store
   

With this setup, you can now connect to the database and make queries like the following example:

psql "host=$db_host port=$db_port user=$db_username dbname=$db_name sslmode=verify-ca sslrootcert=$db_ca_path" -c "SELECT * FROM images"

You could also use GUI clients such as Postico or DBeaver to interact with the database.