Using Spanner Emulator for Testing

Using Spanner Emulator for Testing

Obtain your ip address and assign a hostname for spanner emulator. In this case my ip address is 10.146.197.203 and I will assging spanner.localdomain

echo "10.146.197.203 spanner.localdomain" >> /etc/hosts

Download Spanner Emulator and Start Server

VERSION=1.4.2
wget https://storage.googleapis.com/cloud-spanner-emulator/releases/${VERSION}/cloud-spanner-emulator_linux_amd64-${VERSION}.tar.gz
tar zxvf cloud-spanner-emulator_linux_amd64-${VERSION}.tar.gz
chmod u+x gateway_main emulator_main

You can start Spanner Emulator Server as

./gateway_main --hostname 0.0.0.0 --grpc_port 9010 --http_port 9020

Note! Remember this is emulator and data is stored in RAM. When emulator is stopped your data will gone.

Download Google Cloud CLI and create project, instance and db

On another terminal

wget https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-cli-399.0.0-linux-x86_64.tar.gz
tar -zxf google-cloud-cli-399.0.0-linux-x86_64.tar.gz

Change to directory

cd google-cloud-sdk/bin

Create project, instance and db

export SPANNER_EMULATOR_HOST="spanner.localdomain:9010"
./gcloud config set api_endpoint_overrides/spanner http://spanner.localdomain:9020/
./gcloud config set auth/disable_credentials true
./gcloud config set project jans-project
./gcloud spanner instances create jans-instance --config=emulator-config --description="Jans Instance" --nodes=1
./gcloud spanner databases create jansdb --instance jans-instance

Jannsen DB options

When Jans installer prompts Backend Type, select Cloud Spanner, and type y for question Is it emulator?. Emulator Host is spanner.localdomain, and you can leave other options as empty for default values:

Chose Backend Type:
  1 Local OpenDj
  2 Remote OpenDj
  3 Local MySQL
  4 Remote MySQL
  5 Remote Couchbase
  6 Cloud Spanner
Selection [1]: 6
  Is it emulator? [N|y] : y
  Emulator host : spanner.localdomain
  Spanner project [jans-project] : 
  Spanner instance [jans-instance] : 
  Spanner database [jansdb] : 
  Checking spanner connection