[filebeat] Make chart compatible with Kubernetes-on-Windows

Describe the feature:

Although filebeat itself works perfectly fine on Windows and Kubernetes on Windows the Helm chart is not configurable enough to use it for both Linux and Windows.

There’s 2 notable things that need to be possible:

1. Volume varlibdockercontainers needs to have hostPath /ProgramData/docker/containers to be able to find the container logs. It can still be mapped to mountPath /var/lib/docker/containers, which is actually preferable, because you can then reuse the same config between linux and windows deamonsets.
2. Mounting files with subPath is not possible for Windows containers, only directories can be mounted. For that reason filebeat-config and data volumes need to be mounted in different locations, without the subPath properties getting used.

Describe a specific use case for the feature:

Shipping logs from Kubernetes on Windows nodes.

[JorritSalverda]

By the way, my Windows container looks like:

FROM mcr.microsoft.com/windows/servercore:ltsc2019 AS core

# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

RUN $url = 'https://artifacts.elastic.co/downloads/beats/filebeat/filebeat-7.10.2-windows-x86_64.zip'; \
	Write-Host ('Downloading {0} to filebeat.zip ...' -f $url); \
	Invoke-WebRequest -Uri $url -OutFile 'filebeat.zip' -TimeoutSec 300; \
	\
	$sha512 = '0926ff4fecc24d3f9c606ca138647ee3be42d8e485ae69aff433d559963e712b78f1d093809cb57197064b353c6f48d4184e5081fd506d33467b220a1d991ab2'; \
	Write-Host ('Verifying sha512 ({0}) ...' -f $sha512); \
	if ((Get-FileHash filebeat.zip -Algorithm sha512).Hash -ne $sha512) { \
		Write-Host 'FAILED!'; \
		exit 1; \
	}; \
	\
  New-Item -Path 'c:\' -Name 'filebeat' -ItemType 'directory'; \
	Write-Host 'Expanding filebeat.zip ...'; \
	Expand-Archive filebeat.zip -DestinationPath C:\filebeat; \
	\
	Write-Host 'Removing filebeat.zip ...'; \
	Remove-Item filebeat.zip -Force; \
	\
	Write-Host 'Completed installing filebeat.';

FROM mcr.microsoft.com/windows/nanoserver:1809

COPY --from=core /filebeat/filebeat-7.10.2-windows-x86_64 /filebeat
COPY --from=core /Windows/System32/netapi32.dll /Windows/System32/netapi32.dll

USER ContainerAdministrator

ENTRYPOINT [ "c:\\filebeat\\filebeat.exe", "-c", "c:\\usr\\share\\filebeat\\filebeat.yml" ]

[botelastic[bot]]

This issue has been automatically closed because it has not had recent activity since being marked as stale.