Add .helmignore to Helm chart

[fooock]

To ignore common files like in this chart

[markmandel]

Just so I understand this properly - what is the exact purpose of a .helmignore file? Where would it go in the repo? @enocom I think you mentioned this as well. I couldn't find any specific docs on this other than this single reference.

[markmandel]

Sorry, I got this wrong, it was @Kuqd who mention this in chat yesterday.

[cyriltovena]

What do we have to ignore ?

[alexandrem]

The .helmignore is to prevent parsing non helm chart related files in the project workspace and sending them to Tiller.

This becomes especially important for generated builds or large asset files, because you might encounter the famous

Error: grpc: received message length xxx exceeding the max size xxx

or

Error: grpc: received message larger than max (xxx vs. xxx)

error message when running helm commands (e.g helm install or helm list) with local charts, which is common during development.

[cyriltovena]

There is nothing to ignore so far. Should we close and reopen if required?

[alexandrem]

I guess it wouldn't hurt to add the default ignore file generated by helm itself:

# Patterns to ignore when building packages.
# This supports shell glob matching, relative path matching, and
# negation (prefixed with !). Only one pattern per line.
.DS_Store
# Common VCS dirs
.git/
.gitignore
.bzr/
.bzrignore
.hg/
.hgignore
.svn/
# Common backup files
*.swp
*.bak
*.tmp
*~
# Various IDEs
.project
.idea/
*.tmproj