ReleaseEngineering/How To/Adjust SSH keys on a slave

There are three sets of keys that are important: staging, production and try. Aside from a strange permissions problem on linux (.ssh is root:root owned), the process is roughly consistent on all three platforms.

In general, copy SSH keys from a similarly-configured slave. You will need to use -oBatchMode=no in your ssh invocation to avoid host-key failures. Note that only the private keys (*_dsa) are required, not the public keys (*_dsa.pub) (however, if you have the ".pub", it must match with the private or the key will silently fail). Also note that the staging and production keys have the same filename. The current production ffxbld_dsa has md5 beginning with '166b900'; staging's begins with '86bcf286'.

Staging

These Windows instructions are probably very obsolete:

# Windows
cd .ssh
C:\mozilla-build\msys\bin\scp cltbld@linux-ix-slave03:~/.ssh/* .
set HOME=C:\Users\cltbld

To test that we're good:

ssh -i ~/.ssh/ffxbld_dsa    ffxbld@dev-stage01.srv.releng.scl3.mozilla.com exit
ssh -i ~/.ssh/trybld_dsa    trybld@dev-stage01.srv.releng.scl3.mozilla.com exit
ssh -i ~/.ssh/xrbld_dsa     xrbld@dev-stage01.srv.releng.scl3.mozilla.com exit
ssh -i ~/.ssh/tbirdbld_dsa  tbirdbld@dev-stage01.srv.releng.scl3.mozilla.com exit
ssh -i ~/.ssh/aus           ffxbld@dev-stage01.srv.releng.scl3.mozilla.com exit

Preproduction

Preproduction keys are not the same as staging keys - see ReleaseEngineering/Preproduction/Stage.

Production

NOTE: Make sure that the host you try to grab keys from is on the same data-center.

Steps for Windows:

rm -rf .ssh
"C:\mozilla-build\msys\bin\scp" -o 'StrictHostKeyChecking no' -o 'BatchMode=no' -r  cltbld@bld-linux64-ix-028:~/.ssh .ssh

To test that a production master slave is set up properly, you must be able to run the following commands:

ssh -i ~/.ssh/ffxbld_dsa    ffxbld@symbolpush.mozilla.org exit
ssh -i ~/.ssh/ffxbld_dsa    ffxbld@stage.mozilla.org exit
ssh -i ~/.ssh/xrbld_dsa     xrbld@stage.mozilla.org exit
ssh -i ~/.ssh/auspush       ffxbld@aus3-staging.mozilla.org exit
ssh -i ~/.ssh/auspush       tbirdbld@aus3-staging.mozilla.org exit
ssh -i ~/.ssh/tbirdbld_dsa  tbirdbld@symbols1.dmz.phx1.mozilla.com exit
ssh -i ~/.ssh/tbirdbld_dsa  tbirdbld@stage.mozilla.org exit

Try

Try builders use different keys!

You must wipe any ssh keys that are not trybld from a newly imaged slave, and copy in the trybld keys from another try builder (staging trybld keys are on the staging slaves)

To test that a try slave is set up properly, you must be able to run the following commands:

ssh -i ~/.ssh/trybld_dsa trybld@stage.mozilla.org hostname

Steps for Windows (from SSH):

rm -rf .ssh
mkdir .ssh
scp cltbld@bld-centos6-hp-024:~/.ssh/* .ssh
ssh -i ~/.ssh/trybld_dsa trybld@stage.mozilla.org hostname
rm -rf /e/builds/moz2_slave