How to create Fn based functions applications from the CLI and deploy them in Oracle Cloud OCI. A Linux based example.

1. Chief Enterprise Architect @ Oracle
March 2020
Johan Louwers
Create application(s) from the CLI with OCI Functions
Serverless computing

2. 2 Confidential – © 2019 Oracle – Johan Louwers
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3. 3
Slide-deck Intention :
This presentation is intended to provide a
quick introduction to create a new
application for Oracle Cloud Functions
from the cli of your development
workstation.
This example is a part of a wider
workshop deck and shared as a stand-
alone example for ease of sharing.
The code should only be used as an
educational example and is not intended
to be included in any real-world
application code.
Contact details :
Johan Louwers - Chief Enterprise Architect
@johanlouwers
Johan.louwers@oracle.com
github.com/louwersj
Johanlouwers.blogspot.com
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
Confidential – © 2019 Oracle – Johan Louwers

4. 4
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
F(n)
Oracle cloud – Functions:
• No lock-in
• Built on open-source Fn project and Docker
• Pay Per Use
• Pay for execution, not for idle time
• Autonomous
• Platform auto-scales functions. No servers to provision / manage
• Cloud native
• Fully cloud native and serverless
Confidential – © 2019 Oracle – Johan Louwers

5. 5
Step 0 :
• Ensure you have followed all instruction for configuring functions in Oracle Cloud
• https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionsconfiguringtenancies.htm
• Ensure you have followed all instructions for configuring your local development environment
• https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionsconfiguringclient.htm
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
Confidential – © 2019 Oracle – Johan Louwers

6. 6
[root@fnproject neptune]# fn create app neptune --annotation oracle.com/oci/subnetIds='["…ID1…","…ID2…","…ID3…"]'
Successfully created app: neptune
[root@fnproject neptune]#
[root@fnproject neptune]#
Step 1 :
• create the application named “neptune” using “fn create app”
• Ensure to replace …ID1… / …ID2… / …ID3… with the appropriate IDs of the subnets you want to use in OCI
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
Confidential – © 2019 Oracle – Johan Louwers

7. 7
[root@fnproject neptune]# fn list apps
NAME ID
neptune ocid1.fnapp.oc1.eu-frankfurt-1.aaaaaaaaag………
[root@fnproject neptune]#
[root@fnproject neptune]#
Step 2 :
• create the function app using “fun create app”
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
Confidential – © 2019 Oracle – Johan Louwers

8. 8
[root@fnproject neptune]# echo 'name: neptune' > app.yaml
[root@fnproject neptune]#
[root@fnproject neptune]#
[root@fnproject neptune]# cat app.yaml
name: neptune
[root@fnproject neptune]#
[root@fnproject neptune]#
Step 3 :
• Ensure a correct app.yaml file on your development machine.
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
Confidential – © 2019 Oracle – Johan Louwers

9. 9
[root@fnproject neptune]# fn init --runtime python
Function boilerplate generated.
func.yaml created.
[root@fnproject neptune]#
[root@fnproject neptune]#
Step 4 :
• Create a root function
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
Confidential – © 2019 Oracle – Johan Louwers

10. 10
[root@fnproject neptune]# cat func.yaml
schema_version: 20180708
name: neptune
version: 0.0.1
runtime: python
entrypoint: /python/bin/fdk /function/func.py handler
memory: 256
[root@fnproject neptune]#
Step 5 :
• Check the root function
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
Confidential – © 2019 Oracle – Johan Louwers

11. 11
Step 8 :
• Verify the deployment in the Oracle Cloud UI
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
Confidential – © 2019 Oracle – Johan Louwers
[root@fnproject neptune]# fn init --runtime python parseVerifyCode
Creating function at: /parseVerifyCode
Function boilerplate generated.
func.yaml created.
[root@fnproject neptune]#

12. 12
[root@fnproject neptune]# fn -v deploy –all
Step 7 :
• Deploy the entire app
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
Confidential – © 2019 Oracle – Johan Louwers

13. 13
Step 8 :
• Done 
Oracle Functions - Serverless Computing
Create application(s) from the CLI with OCI Functions
Confidential – © 2019 Oracle – Johan Louwers