Make --as-group a positional arg

[boxidau]

No point doing --as-group, lets just have the AS group name as the first arg

[boxidau]

group name configuration should be dynamically detected in the following ways

• Check if there's only one group, use it if there is
• Check instance metadata for key "ras-group"
• Failover to trying to work out what group the instance is a member of by walking groups

[Teddy-Schmitz]

So do you want to get rid of this parameter completely then? Or will the whole flow be.

• If group is defined as argument use that
• Check if there's only one group, use it if there is
• Check instance metadata for key "ras-group"
• Failover to trying to work out what group the instance is a member of by walking groups

[boxidau]

After discussion we are going with name parsing on hostnames. Autoscale group members have naming conventions which can be followed for config options.

for example app-server-1234567890 could be an as group server name

we should remove the random string and see if the remainder is a config section name, the replaces the "expensive" walking of AS group members and also the metadata method