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handler.ps1
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handler.ps1
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Function Process-Init {
[CmdletBinding()]
param()
Write-Host "$(Get-Date) - Processing Init`n"
Write-Host "$(Get-Date) - Init Processing Completed`n"
}
Function Process-Shutdown {
[CmdletBinding()]
param()
Write-Host "$(Get-Date) - Processing Shutdown`n"
Write-Host "$(Get-Date) - Shutdown Processing Completed`n"
}
Function Process-Handler {
[CmdletBinding()]
param(
[Parameter(Position=0,Mandatory=$true)][CloudNative.CloudEvents.CloudEvent]$CloudEvent
)
# Decode CloudEvent
try {
$cloudEventData = $cloudEvent | Read-CloudEventJsonData -Depth 10
} catch {
throw "`nPayload must be JSON encoded"
}
try {
$jsonSecrets = ${env:SLACK_SECRET} | ConvertFrom-Json
} catch {
throw "`nK8s secrets `$env:SLACK_SECRET does not look to be defined"
}
if(${env:FUNCTION_DEBUG} -eq "true") {
Write-Host "$(Get-Date) - DEBUG: K8s Secrets:`n${env:SLACK_SECRET}`n"
Write-Host "$(Get-Date) - DEBUG: CloudEventData`n $(${cloudEventData} | Out-String)`n"
}
# Construct Slack message object
$payload = @{
attachments = @(
@{
pretext = $(${jsonSecrets}.SLACK_MESSAGE_PRETEXT);
fields = @(
@{
title = "Kubernetes Api Server Message";
value = $cloudEventData.message;
short = "false";
}
@{
title = "Reason";
value = $cloudEventData.reason;
short = "false";
}
@{
title = "Kind:";
value = $cloudEventData.involvedObject.kind;
short = "false";
}
@{
title = "Name:";
value = $cloudEventData.involvedObject.name;
short = "false";
}
@{
title = "Namespace:";
value = $cloudEventData.metadata.namespace;
short = "false";
}
@{
title = "Event Type:";
value = $cloudEvent.type;
short = "false";
}
@{
title = "Unique ID:";
value = $cloudEvent.id;
short = "false";
}
@{
title = "DateTime in UTC:";
value = $cloudEvent.time;
short = "false";
}
@{
title = "Source:";
value = $cloudEvent.source;
short = "false";
}
)
footer = "Powered by Knative";
footer_icon = "https://github.com/knative/docs/blob/main/docs/images/logo/cmyk/knative-logo-cmyk.png";
}
)
}
# Convert Slack message object into JSON
$body = $payload | ConvertTo-Json -Depth 5
if(${env:FUNCTION_DEBUG} -eq "true") {
Write-Host "$(Get-Date) - DEBUG: `"$body`""
}
Write-Host "$(Get-Date) - Sending Webhook payload to Slack ..."
$ProgressPreference = "SilentlyContinue"
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { $true }
try {
[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12
Invoke-WebRequest -Uri $(${jsonSecrets}.SLACK_WEBHOOK_URL) -Method POST -ContentType "application/json" -Body $body -SkipCertificateCheck
} catch {
throw "$(Get-Date) - Failed to send Slack Message: $($_)"
}
# Add the following line after making the web request to reset certificate validation behavior
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = $null
Write-Host "$(Get-Date) - Successfully sent Webhook ..."
}