bosh ssh non-interactive and control sockets don't play well

[darth-hp]

When using eg ControlMaster auto (reusable ssh sessions) on all hosts Host *, bosh shows an error:
process_mux_new_session: tcgetattr: Inappropriate ioctl for device
This behavior is due to the nature that ssh wants to keep a control session running even after it got disconnected but bosh expects ssh to end.

Two workarounds I found:

a) Try to exclude IP addresses from the environment in the users ssh config before Host *

# Don't use control sockets for IP addresses (simplified match)
Host *.*.???.* *.*.??.* *.*.?.*
  ControlMaster no

Of course you could have the IP addresses in your match like 192.168.*.* but if you don't know them for whatever reason above may be appropriate.

b) Pass in a ssh option for bosh

bosh -e vbox -d cf ssh --opts " -o ControlMaster=false" uaa/0 -c 'ls -l /'

I believe it should be standard for the cmdOpts in https://github.com/cloudfoundry/bosh-cli/blob/master/ssh/session.go since this ssh sessions will never be reused

Option b) doesn't work with scp since that doesn't accept options.

[cppforlife]

Option b) doesn't work with scp since that doesn't accept options.

you mean scp command in bosh doesn accept --opts, not that scp doesnt respect ControlMaster=false?

cc @evanfarrar @cunnie @coreyti

[darth-hp]

At least not when I opened that issue

[bosh-admin-bot]

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[bosh-admin-bot]

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