Example of a container with a health check

WindowsContainerCheckMyHealth.ps1

# Command line to run a PowerShell encoded command (allows you to avoid escaping special characters)
$runPoshEncodedCmd = 'powershell.exe -NoLogo -NoProfile -NonInteractive -ExecutionPolicy Bypass -EncodedCommand '

# Command to run in the container - loop which outputs the date to a file and STDOUT
$command = "& { Write-Host `"The working directory is [`$(`$pwd.Path)]`";"
$command += " `$null = New-Item -Path c:\temp\ -ItemType Directory -ErrorAction SilentlyContinue;"
$command += " do { Get-Date -Format s | Tee-Object -FilePath C:\Temp\date_output2.txt -Append;"
$command += " Write-Host `"Line count: `$((Get-Content -Path C:\Temp\date_output2.txt).Count)`";"
$command += " Start-Sleep -Seconds 5} while (`$true) }"

# Health Check Command - once the number of lines in the date file gets over a certain amount container is unhealthy
$healthCommand = 'if ((Get-Content -Path C:\Temp\date_output2.txt).Count -gt 5) { exit 1 } else { exit 0 }'
[string] $encodedHealthCommand = [convert]::ToBase64String([System.Text.Encoding]::Unicode.GetBytes($healthCommand))

# Docker Run
docker container run --name checkmyhealth --health-cmd ($runPoshEncodedCmd + $encodedHealthCommand) `
--health-interval 10s --health-retries 2 --health-start-period 5s --health-timeout 5s `
--rm -it mcr.microsoft.com/windows/servercore:ltsc2019 powershell -command $command

<#

 # From another terminal on the host monitor the container (declining) health with this command 
 do {
   (docker container inspect checkmyhealth | ConvertFrom-Json).State.Health |
   Select-Object Status,FailingStreak; start-sleep 5
 } while ($true)
 
#>