ReadMe

Automatic loading of Google Calendar events to Toggl using trigger events coming from Cloud Scheduler via Pub/Sub to a Cloud Functions service. The solution has 2 main parts:

1. Function that loads calendar events and predicts the project for each event
2. Function that retrains prediction model periodically

1. Setting up loading function

1. Generate Calender API and Toggl credentials using generate_credentials.py.
2. Enable required Google APIs.
3. Create Pub/Sub topic.
4. Deploy Cloud Function.
5. Deploy a scheduled job in Cloud Scheduler.

Enable APIs

gcloud services enable pubsub.googleapis.com \
    cloudfunctions.googleapis.com \
    cloudscheduler.googleapis.com \
    calendar-json.googleapis.com \
    servicemanagement.googleapis.com

Create Pub/Sub topic

gcloud pubsub topics create calendar

Deploy code to Cloud Functions

gcloud functions deploy calendar_to_toggl \
    --runtime python38 \
    --trigger-topic calendar \
    --memory 512MB

Create Cloud Scheduler

gcloud scheduler jobs create pubsub calendar_trigger \
    --schedule "0 10-22/4 * * 1-5" \
    --topic=calendar \
    --message-body "4" \
    --time-zone "Europe/Budapest"

2. Setting up retraining pipeline

From the retrainer_cf folder issue the following commands:

Copy the pickled credentials to a cloud storage bucket and add it to the retrainer_cf/main.py

Create Pub/Sub topic

gcloud pubsub topics create calendar_retrain

Deploy code to Cloud Functions

gcloud functions deploy calendar_retrain \
    --runtime python38 \
    --trigger-topic calendar_retrain \
    --memory 128MB

Create Cloud Scheduler

gcloud scheduler jobs create pubsub calendar_retraining_trigger \
    --schedule "0 22 * * 1-5" \
    --topic=calendar_retrain \
    --message-body "0" \
    --time-zone "Europe/Budapest"

Next steps

• Automate deployment
• Store Toggl project infos in Datastore since querying it requires admin rights

Additional how to-s

Generate requirements.txt from Pipfile

pipenv lock -r > requirements.txt

Store API key in Secret Manager

First create the secret version

printf "YOUR SECRET" | gcloud secrets create toggl_key --data-file=-

Then add methods from getSecret.py to main.py.

Run retraining job

From the retrainer_cf folder issue:

gcloud compute instances create calendar-retrainer \
    --image-family=cos-89-lts \
    --image-project=cos-cloud \
    --machine-type=e2-medium-2 \
    --scopes cloud-platform \
    --container-image=gcr.io/norbert-liki-sandbox/calendar-trainer:latest \
    --zone us-central1-a \
    --preemptible

Building and testing docker container for retraining

gcloud builds submit . -t gcr.io/norbert-liki-sandbox/calendar-trainer:latest --timeout=9999

Run the container locally to test it

docker run --rm -v ~/.config/gcloud:/.config/gcloud -e GOOGLE_APPLICATION_CREDENTIALS=/.config/gcloud/application_default_credentials.json gcr.io/norbert-liki-sandbox/calendar-trainer:latest