Can't use environment variable to get SharedKey

[jorjenava]

Trying to set the shared key using an environment variable like below:

<appender name="Log4ALAAppender" type="Log4ALA.Log4ALAAppender, Log4ALA">
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
        </layout>
        <workspaceId value="${MY_PREFIX_ALAWorkspaceId}" />
        <SharedKey value="${MY_PREFIX_ALASharedKey}" />
        <logType value="my_log_type" />
    </appender>

I keep getting this error:

[Log4ALAAppender] - Unable to activate Log4ALAAppender: [The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.]

I know the shared key I have is good because if I put it directly in the config it works fine. Not sure if I need to escape the value somehow when I create the environment variable.

Details:
.netcoreapp 2.1
Log4ALA 2.3.6
Developing on Windows 10 and deploying to Ubuntu Docker container

[jorjenava]

Ok so I forked your repo and started debugging and I realized that the Log4ALA appender doesn't interpret those environment variables at all. So the SharedKey is literally getting set to ${MY_PREFIX_ALASharedKey} as well as the workspaceId is getting set to ${MY_PREFIX_ALAWorkspaceId}.

So I guess this is really more of a feature request to add support for environment variables in the configuration now.

[moberacker]

Hi @jorjenava,

in Case of .netcoreapp please use appsettings.json in combination with log4net.config and try the following:

log4net.config:

<?xml version="1.0" encoding="utf-8" ?>
<log4net>
...
...
   <appender name="Log4ALAAppender" type="Log4ALA.Log4ALAAppender, Log4ALA" />
  <logger name="Log4ALALogger" additivity="false">
    <appender-ref ref="Log4ALAAppender" />
  </logger>
...
...
</log4net>

appsettings.json:

{
  ...
  ...
  "Log4ALAAppender": {
    "logType": "YOUR_LOG_TYPE",
    "logMessageToFile": "false",
    "batchSizeInBytes": "30000",
    "batchWaitMaxInSec": "60"
  }
   ...
   ...
}

and for example now the environment variables to set for workspaceId and SharedKey (environment variable with dotnetcore appsettings notation with ":" )

Log4ALAAppender:workspaceId
Log4ALAAppender:SharedKey