100 Days of Learning: Day 1 – Notion and faas-cli

Photo by Filip Baotić on Unsplash

Today I decided to first take a small detour by learning about using Notion. Why? So that I can take better notes and share it with other people. I am really glad I did! Notion is the tool I have wanted all this time. Seriously give it a go.

In fact Notion is so good, that I am convinced it has just become my default note taking app as well as where I write my initial blog posts on.

Here is my Log book

Notion

Quick summary of what I discovered

  • Block based editor
  • Type / and then you can choose a block type (e.g. Heading 2, bullet list)
  • Pages can have sub pages (infinitely)
  • Highlight text to get a styling menu
  • Blocks can be reordered by dragging the :: (well actually 6 dots)
  • You can build templates to make it easier to add new pages
  • Can do Kanban boards with the Task List template
  • Has the concept of a Database view. Spreadsheets++
  • Can import markdown, html, csv etc.
  • Powerful Sharing and permissions are available
  • Can Export to markdown, PDF etc. <— LOVE THIS!

Installing faas-cli on my Mac

First need to spin up the Ubuntu instance I created yesterday

$ multipass list
Name                    State             IPv4             Image
faasd                   Stopped           --               Ubuntu 20.04 LTS
                                                                                      [20:22:44]
$ multipass start faasd

Check the faas-cli documentation on various ways to install it. I prefer to use brew on my Mac so will be using brew

$ brew install faas-cli

Verify

$ faas-cli version
  ___                   _____           ____
 / _ \ _ __   ___ _ __ |  ___|_ _  __ _/ ___|
| | | | '_ \ / _ \ '_ \| |_ / _` |/ _` \___ \
| |_| | |_) |  __/ | | |  _| (_| | (_| |___) |
 \___/| .__/ \___|_| |_|_|  \__,_|\__,_|____/
      |_|

CLI:
 commit:  6b5e7a14a598527063c7c05fb4187739b6eb6d38
 version: 0.13.6

The nice thing about multipass is that the instance will be restarted and still use the same IP address.

$ multipass list
Name                    State             IPv4             Image
faasd                   Running           192.168.64.4     Ubuntu 20.04 LTS
                                          10.62.0.1

You will need the password for the admin user to use with faas-cli

Following on from yesterday’s configuration I will be using SSH to connect to the instance.

$ ssh -i ~/.ssh/id_rsa -o PreferredAuthentications=publickey ubuntu@192.168.64.4

Cat out the password and save it somewhere locally on your computer. I am saving mine to "~/Learning/faasd/password.txt"

ubuntu@faasd:~$ sudo cat /var/lib/faasd/secrets/basic-auth-password ;echo
zI24jRLe45DhUPa21S6BoNy5q1DpYUb0FuDwlLfUoBNo6yaDBMZEPTO2W3K

Set the environment variable OPENFAAS_URL so that faas-cli knows where the faasd services is located. For now I will just enter this into the current terminal session but will add it to my zsh setup later.

export OPENFAAS_URL=http://192.168.64.4:8080

Setup faas-cli to use the password.

cat password.txt | faas-cli login --username admin --password-stdin

Calling the OpenFaaS server to validate the credentials...
WARNING! You are not using an encrypted connection to the gateway, consider using HTTPS.
credentials saved for admin http://192.168.64.4:8080

Calling your FaaS

Yesterday I deployed the ASCII Cows function. So lets see if it is still available and if we can invoke it locally using faas-cli

First I consult the help to see if there is an easy way to list the available functions. Running faas-cli help revealed that indeed it is as simple as just using the following.

$ faas-cli list
Function                      	Invocations    	Replicas
cows                          	0              	0

To get more information about the function

$ faas-cli describe cows
Name:                cows
Status:              Not Ready
Replicas:            0
Available replicas:  0
Invocations:         0
Image:
Function process:    node show_cow.js
URL:                 http://192.168.64.4:8080/function/cows
Async URL:           http://192.168.64.4:8080/async-function/cows
Labels:Annotations:%

Lets invoke it!

$ echo verbose | faas-cli invoke cows
         (__)
         (oo)
  /-------\/
 / /      \
* //------\\
  ^        ^
  Cow jogging

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