marcduiker

Links for Persistence in Serverless Applications

• Presentation
• GitHub repository with demos

Blob Storage

• Blob Storage Introduction
• Blob types

marcduiker

VSLive Azure Functions Workshop 2020

This workshop will start with the basics of serverless architectures and explain how Azure Functions play a part in building serverless solutions.

You will learn how to develop Azure Functions using .NET Core and Visual Studio 2019.

Next, you are going to build and deploy these with Azure DevOps using CI/CD.

Also covered is the lifecycle management and operations of serverless solutions.

marcduiker

artifacts: 'flowing'
from_pipelines: 'into'
cloud: 'environments'

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CREATE: Serverless

Overcoming Serverless challenges with Durable Functions

Homework

• Making sense of Durable Functions blog post by Mikhail Shilkov

• Serverless on Azure vlog by Marc Duiker

marcduiker

namespace DurableFunctions.Demo.DotNetCore.RetryCallsWithBackup
{
    public class EscalatingCallsOrchestrator
    {
        [FunctionName(nameof(RunEscalatingCallsOrchestrator))]
        public async Task RunEscalatingCallsOrchestrator(
          [OrchestrationTrigger] IDurableOrchestrationContext context,
          ILogger logger)
        {
            var escalatingCallsInput = context.GetInput<EscalatingCallsInput>();

marcduiker

using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.DurableTask;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace DurableFunctions.Demo.DotNetCore.EscalateCalls

marcduiker

ffmpeg -i input.mp4 -af "volume=10dB" -c:v copy -c:a aac -b:a 192k output.mp4

marcduiker

$prefix="frame_"
$files = Get-ChildItem "<Path where the pngs are>" -Filter *.png | Sort-Object
$fileCount = 0
$files | 
Foreach-Object {
    $fileCount++
    $currentFileNumber = [int]$_.BaseName.Substring($prefix.Length)
    if ($currentFileNumber -ne $fileCount) {
        $newFileFormat = "$prefix{0:d4}.png" -f $fileCount 
        Rename-Item $_.FullName $newFileFormat 

marcduiker

Convert pngs to mp4

This FFmpeg command reads images named frame_[4 char digit].png and converts it to an mp4 using the h264 encoding which Twitter accepts. The bitrate is set to 5M to reduce blocking as much as possible while keeping the size small.

ffmpeg -framerate 10 -i frame_%04d.png -c:v h264_qsv -b:v 5M video.mp4

Convert and scale an existing mp4 to 1080:

ffmpeg -i input.mp4 -c:v h264_qsv -vf: scale=1080:-1 -b:v 5M output.mp4

marcduiker

$principalId = az functionapp identity show -n FUNC_APP_NAME -g RESOURCE_GROUP_NAME --query principalId
$appId = az ad sp show --id $principalId --query appId
az keyvault set-policy -n KEYVAULT_NAME --spn $appId --secret-permissions get