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Setup PostgreSQL

This article provides guidance on configuring a PostgreSQL state store.

Create a PostgreSQL Store

Dapr can use any PostgreSQL instance. If you already have a running instance of PostgreSQL, move on to the Create a Dapr component section.

Run an instance of PostgreSQL. You can run a local instance of PostgreSQL in Docker CE with the following command:

This example does not describe a production configuration because it sets the password in plain text and the user name is left as the PostgreSQL default of "postgres".
```
docker run -p 5432:5432 -e POSTGRES_PASSWORD=example postgres
```
Create a database for state data. Either the default "postgres" database can be used, or create a new database for storing state data.

To create a new database in PostgreSQL, run the following SQL command:
```
create database dapr_test
```

Create a Dapr component

Create a file called postgres.yaml, paste the following and replace the <CONNECTION STRING> value with your connection string. The connection string is a standard PostgreSQL connection string. For example, "host=localhost user=postgres password=example port=5432 connect_timeout=10 database=dapr_test". See the PostgreSQL documentation on database connections, specifically Keyword/Value Connection Strings, for information on how to define a connection string.

If you want to also configure PostgreSQL to store actors, add the actorStateStore configuration element shown below.

apiVersion: dapr.io/v1alpha1
kind: Component
metadata:
  name: statestore
spec:
  type: state.postgresql
  metadata:
  - name: connectionString
    value: "<CONNECTION STRING>"
  - name: actorStateStore
    value: "true"

The above example uses secrets as plain strings. It is recommended to use a secret store for the secrets as described here.

Apply the configuration

In Kubernetes

To apply the PostgreSQL state store to Kubernetes, use the kubectl CLI:

kubectl apply -f postgres.yaml

Running locally

To run locally, create a components dir containing the YAML file and provide the path to the dapr run command with the flag --components-path.

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