02: prereq

config.yaml

@@ -64,6 +64,7 @@ contact: '[email protected]' # FIXME
 # Order of episodes in your lesson
 episodes: 
 - 01-intro.md
+- 02-storage.md
 
 # Information for Learners
 learners: 

episodes/02-storage.md

@@ -0,0 +1,125 @@
+---
+title: "Persistent storage"
+teaching: 10
+exercises: 5 
+---
+
+:::::::::::::::::::::::::::::::::::::: questions 
+
+- How to create a Google Cloud Storage bucket?
+- Why it done separately from the cluster?
+
+::::::::::::::::::::::::::::::::::::::::::::::::
+
+::::::::::::::::::::::::::::::::::::: objectives
+
+- Learn to create a Google Cloud Storage bucket
+- Understand the persistant storage costs.
+
+::::::::::::::::::::::::::::::::::::::::::::::::
+
+## Storage for the output files
+
+The processing workflow writes the output files to a storage from which they can be downloaded afterwards. 
+
+For this tutorial, we use a Google Cloud Storage (GCS) bucket. 
+
+::::::::::::::::::::::::::::::::::::: callout
+
+The storage is created separately from the cluster resources. You can then delete the cluster just after the processing and avoid unnecessary costs, but keep the output files.
+
+::::::::::::::::::::::::::::::::::::::::::::::::
+
+## Prerequisites
+
+### GCP account and project
+
+Make sure that you are in the GCP account and project that you intend to use for this work. In your Linux terminal, type
+
+```bash
+gcloud config list
+```
+
+The output shows your account and project. 
+
+:::::::::::::::::::::::::::::::::::::::::: spoiler
+
+### How to change them?
+
+If they are not what you expect (in case you have many), change them with
+
+```bask
+gcloud config set account <ACCOUNT>
+```
+
+and
+
+```bash
+gcloud config set project <PROJECT_ID>
+```
+
+#### Accounts
+
+You can can check the credentialed accounts with
+
+```bash
+gcloud auth list
+```
+
+If you get none or your account does not appear in the list, run 
+
+```bash
+gcloud init
+```
+
+and follow the steps in the output.
+
+#### Projects
+
+List the projects within the active account with
+
+```bash
+gcloud projects list
+```
+
+::::::::::::::::::::::::::::::::::::::::::::::::
+
+### Billing account?
+
+If this is your first project or you created it from the Google Cloud Console Web UI, it will have a billing account linked to it.
+
+If you created the project from the command line without specifying the billing account, you can link it to an existing account.
+
+First list the billing accounts
+
+```bash
+gcloud billing accounts list
+```
+
+Take the account id from the output, and check if your project is linked to it
+
+```bash
+gcloud billing projects list --billing-account <ACCOUNT_ID>
+```
+
+If not, link your project to this account with
+gcloud billing projects link <PROJECT_ID> --billing-account <ACCOUNT_ID>
+```bash
+
+```
+
+### Enabling services
+
+### Decide your region
+
+
+
+::::::::::::::::::::::::::::::::::::: keypoints 
+
+- Google Cloud Storage bucket can be used to store the output files.
+- The storage cost depends on the volume stored.
+- The download 
+
+
+::::::::::::::::::::::::::::::::::::::::::::::::
+

learners/reference.md

@@ -6,5 +6,6 @@ title: 'Reference'
 
 GCP - [Google Cloud Platform](https://cloud.google.com/)
 GKE - [Google Kubernetes Engine](https://cloud.google.com/kubernetes-engine)
+GCS - [Google Cloud Storage](https://cloud.google.com/storage)
 K8s - [Kubernetes](https://kubernetes.io/)