feat: add instructions for alloydb (#27)

README.md

@@ -85,8 +85,7 @@ Deploying this demo consists of 3 steps:
 The extension service uses an interchangeable 'datastore' interface. Choose one
 of any of the database's listed below to set up and initialize your database:
 
-// TODO: complete this link
-* [Set up and configure AlloyDB][]
+* [Set up and configure AlloyDB][docs/datastore/postgres.md]
 
 ### Deploying the Extension Service
 

cloudrun_instructions.md

@@ -13,9 +13,6 @@
     * Service Networking
 * Cloud SQL PostgreSQL instance or AlloyDB cluster and primary instance
 
-## Datastore Setup
-
-
 ## Deployment
 
 1. For easier deployment, set environment variables:
@@ -116,4 +113,4 @@
         --service-account demo-identity
     ```
 
-    Note: Your organization may not allow unauthenticated requests. Deploy with `--no-allow-unauthenticated` and use the proxy to view the frontend: `gcloud run services proxy demo-service`.
+    Note: Your organization may not allow unauthenticated requests. Deploy with `--no-allow-unauthenticated` and use the proxy to view the frontend: `gcloud run services proxy demo-service`.

docs/datastore/alloydb.md

@@ -0,0 +1,226 @@
+# Setup and configure AlloyDB 
+
+## Before you begin
+
+1. Make sure you have a Google Cloud project and billing is enabled.
+
+1. Set your `PROJECT_ID` environment variable:
+
+    ```bash
+    export PROJECT_ID=<YOUR_PROJECT_ID>
+    ```
+
+1. [Install](https://cloud.google.com/sdk/docs/install) the gcloud CLI.
+
+1. Set gcloud project:
+
+    ```bash
+    gcloud config set project $PROJECT_ID
+    ```
+
+1. Enable APIs:
+
+    ```bash
+    gcloud services enable alloydb.googleapis.com \
+                           compute.googleapis.com \
+                           cloudresourcemanager.googleapis.com \ 
+                           servicenetworking.googleapis.com \
+                           vpcaccess.googleapis.com \
+                           aiplatform.googleapis.com
+    ```
+1. Download and install [postgres-client cli (`psql`)][install-psql].
+
+[install-psql]: https://www.timescale.com/blog/how-to-install-psql-on-mac-ubuntu-debian-windows/
+
+1. Clone this repo to your local machine:
+
+    ```bash
+        git clone [email protected]:GoogleCloudPlatform/database-query-extension.git
+    ```
+
+
+## Enable private services access
+
+In this step, we will enable Private Services Access so that AlloyDB is able to
+connect to your VPC. You should only need to do this once per VPC (per project). 
+
+1. Set environment variables:
+
+    ```bash
+    export RANGE_NAME=my-allocated-range-default
+    export DESCRIPTION="peering range for alloydb-service"
+    ```
+
+1. Create an allocated IP address range:
+
+    ```bash
+    gcloud compute addresses create $RANGE_NAME \
+        --global \
+        --purpose=VPC_PEERING \
+        --prefix-length=16 \
+        --description="$DESCRIPTION" \
+        --network=default
+    ```
+
+1. Create a private connection:
+
+    ```bash
+    gcloud services vpc-peerings connect \
+        --service=servicenetworking.googleapis.com \
+        --ranges="$RANGE_NAME" \
+        --network=default
+    ```
+
+
+## Create a AlloyDB cluster
+
+1. Set environment variables. For security reasons, use a different password for
+   DB_PASS:
+
+    ```bash
+    export CLUSTER=my-alloydb-cluster
+    export DB_PASS=my-alloydb-pass
+    export INSTANCE=my-alloydb-instance
+    export REGION=us-central1
+    ```
+
+1. Create an AlloyDB cluster:
+
+    ```bash
+    gcloud alloydb clusters create $CLUSTER \
+        --password=$DB_PASS\
+        --network=default \
+        --region=$REGION \
+        --project=$PROJECT_ID
+    ```
+
+1. Create a primary instance:
+
+    ```bash
+    gcloud alloydb instances create $INSTANCE \
+        --instance-type=PRIMARY \
+        --cpu-count=8 \
+        --region=$REGION \
+        --cluster=$CLUSTER \
+        --project=$PROJECT_ID
+    ```
+
+1. Get AlloyDB IP address:
+
+    ```bash
+    export ALLOYDB_IP=$(gcloud alloydb instances describe $INSTANCE \
+        --cluster=$CLUSTER \
+        --region=$REGION \
+        --format=json | jq \
+        --raw-output ".ipAddress")
+    ```
+
+1. Note the AlloyDB IP address for later use:
+
+    ```bash
+    echo $ALLOYDB_IP
+    ```
+
+## Set up connection to AlloyDB
+
+For this section, we will create a Google Cloud Engine VM in the same VPC as the
+AlloyDB cluster. We can use this VM to connect to our AlloyDB cluster using
+Private IP.
+
+1. Set environment variables:
+
+    ```bash
+    export ZONE=us-central1-a
+    export PROJECT_NUM=$(gcloud projects describe $PROJECT_ID --format="value(projectNumber)")
+    export VM_INSTANCE=alloydb-vm-instance
+    ```
+
+1. Create a Compute Engine VM:
+
+    ```bash
+    gcloud compute instances create $VM_INSTANCE \
+        --project=$PROJECT_ID \
+        --zone=$ZONE \
+        --machine-type=e2-medium \
+        --network-interface=network-tier=PREMIUM,stack-type=IPV4_ONLY,subnet=default \
+        --maintenance-policy=MIGRATE \
+        --provisioning-model=STANDARD \
+        --service-account=$PROJECT_NUM[email protected] \
+        --scopes=https://www.googleapis.com/auth/cloud-platform \
+        --create-disk=auto-delete=yes,boot=yes,device-name=$VM_INSTANCE,image=projects/ubuntu-os-cloud/global/images/ubuntu-2004-focal-v20231025,mode=rw,size=10,type=projects/$PROJECT_ID/zones/$ZONE/diskTypes/pd-balanced \
+        --no-shielded-secure-boot \
+        --shielded-vtpm \
+        --shielded-integrity-monitoring \
+        --labels=goog-ec-src=vm_add-gcloud \
+        --reservation-affinity=any
+    ```
+
+1. Create an SSH tunnel through your GCE VM using port forwarding. This will
+   listen to `127.0.0.1:5432` and forward through the GCE VM to your AlloyDB
+   instance:
+
+    ```bash
+    gcloud compute ssh --project=$PROJECT_ID --zone=$ZONE $VM_INSTANCE \
+                       -- -NL 5432:$ALLOYDB_IP:5432
+    ```
+
+    You will need to allow this command to run while you are connecting to
+    AlloyDB. You may wish to open a new terminal to connect with.
+
+1. Verify you can connect to your instance with the `psql` tool. Enter
+   password for AlloyDB when prompted:
+
+    ```bash
+    psql -h 127.0.0.1 -U postgres
+    ```
+
+## Initialize data in AlloyDB
+
+1. While connected using `psql`, create a database and switch to it:
+
+    ```bash
+    CREATE DATABASE assistantdemo;
+    \c assistantdemo
+    ```
+
+1. Install [`pgvector`][pgvector] extension in the database:
+
+    ```bash
+    CREATE EXTENSION vector;
+    ```
+
+[pgvector]: https://github.com/pgvector/pgvector
+
+1. From the root of the project, change into the service directory:
+
+    ```bash
+    cd database-query-extension/extension_service
+    ```
+1. Make a copy of `example-config.yml` and name it `config.yml`.
+
+    ```bash
+    cp example-config.yml config.yml
+    ```
+
+1. Update `config.yml` with your database information.
+
+    ```bash
+    host: 0.0.0.0
+    datastore:
+      # Example for postgres.py provider
+      kind: "postgres"
+      host: 127.0.0.1
+      port: 5432
+      # Update this with the database name
+      database: "assistantdemo"
+      # Update with database user, the default is `postgres`
+      user: "postgres"
+      # Update with database user password
+      password: "my-alloydb-pass"
+    ```
+
+1. Populate data into database:
+
+    ```bash
+    python run_database_init.py
+    ```