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Error Files
Using voyager you can configure haproxy to return a file-content or, execute a command instead of returning generated errors. To achieve this you need to create a configmap specifying the file-content or, command for different status codes. Then you have to specify the configmap name using ingress.appscode.com/errorfiles annotation. Then contents of the configmap will be mounted in the haproxy pod in path /srv/voyager/errorfiles.
Supported commands are: errorfile, errorloc, errorloc302, errorloc303.
And supported status codes are: 200, 400, 403, 405, 408, 429, 500, 502, 503, 504.
For example, lets consider a configmap with following key-value pairs:
503.http : <content of 503.http>
408 : []byte("errorfile /dev/null")
500 : []byte("errorloc https://example.com/500.hlml")
It will generate following block in defaults section of haproxy.cfg:
errorfile 503 /srv/voyager/errorfiles/503.http
errorfile 408 /dev/null
errorloc 500 https://example.com/500.hlml
Note that, when status code with .http suffix is used as key, the command will be errorfile and you just need to specify the file contents as value.
To learn more about these command see here.