psql-function

Native serverless function with PostgreSQL.

The idea behind this function is to prove a concept about creating serverless functions quickly no matter your programming language.

In that example, we are using bash script and psql to create a serverless function that gets an account in the database.

Prerequisites

• IBM Cloud account
• IBM Cloud CLI (https://cloud.ibm.com/functions/learn/cli)
• PostgreSQL instance (You may use the Databases for PostgreSQL in the IBM Cloud)
• Docker

Setup

• Create the database structure contained in the schema.sql file in your PostgreSQL instance.
• Configure the exec file with your credentials to the PostgreSQL instance

HOSTNAME=""
PORT=""
USERNAME=""
PASSWORD=""
PGPASSWORD=""
PGSSLROOTCERT=""

Creating your function

Build your Docker image:

docker build -t epiresdasilva/psql-function .

Tag the docker image:

docker tag epiresdasilva/psql-function epiresdasilva/psql-function:0.0.1

Push the docker image to the Docker hub:

docker push epiresdasilva/psql-function:0.0.1

Create the function in the IBM Cloud:

ibmcloud fn action create psql-function --docker epiresdasilva/psql-function:0.0.1

PS: Replace epiresdasilva with your username in the docker hub

Running

You must pass as payload the branch and account number, exactly like that:

{"branch": 1, "number": 1}

You'll get a response like that: