fix orchestrator startup crash in DualStack cluster #930
  Add this suggestion to a batch that can be applied as a single commit.
  This suggestion is invalid because no changes were made to the code.
  Suggestions cannot be applied while the pull request is closed.
  Suggestions cannot be applied while viewing a subset of changes.
  Only one suggestion per line can be applied in a batch.
  Add this suggestion to a batch that can be applied as a single commit.
  Applying suggestions on deleted lines is not supported.
  You must change the existing code in this line in order to create a valid suggestion.
  Outdated suggestions cannot be applied.
  This suggestion has been applied or marked resolved.
  Suggestions cannot be applied from pending reviews.
  Suggestions cannot be applied on multi-line comments.
  Suggestions cannot be applied while the pull request is queued to merge.
  Suggestion cannot be applied right now. Please check back later.
  
    
  
    
In a cluster where
.Env.HOSTNAMEresolves to an IPv6 address, the orchestrator fails to start due to a syntax error in the raft bind address. This was reported here: #929This commit fixes this, at least for DualStack clusters, by using
.Env.POD_IPinstead, which is defined asand thus typically points to an IPv4 address in DualStack clusters. For a general fix, the orchestrator code itself probably needs to be modified to correctly handle the bind hostname.