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by Graymalk
Thu Nov 12, 2015 5:39 am
Forum: Advanced users
Topic: MPI on Raspberry Pi - problem with logging into devices
Replies: 9
Views: 1634

Re: MPI on Raspberry Pi - problem with logging into devices

The key requirement with MPI is that it *must* be able to SSH into all nodes without it being prompted for a password. The moment it gets prompted, it's dead. Setting up SSH properly is key. I've already got MPI running on each node as a singular process - just can't get it to successfully open comm...
by Graymalk
Thu Nov 12, 2015 5:34 am
Forum: Advanced users
Topic: MPI on Raspberry Pi - problem with logging into devices
Replies: 9
Views: 1634

Re: MPI on Raspberry Pi - problem with logging into devices

I think the problem is essentially one of scope, as in each time I set everything up on one Pi, whenever I exit out of that session, it's lost (the files stay, of course - I'm talking about the changes ssh-agent and ssh-add make). I've noticed my Mac will also prompt for a password after a reboot. I...
by Graymalk
Wed Nov 11, 2015 10:19 pm
Forum: Advanced users
Topic: MPI on Raspberry Pi - problem with logging into devices
Replies: 9
Views: 1634

Re: MPI on Raspberry Pi - problem with logging into devices

OK, I'm just super confused. Here is what is happening currently: I can get it to log in via SSH without password prompt from any device to any device, but only after I've done the following on the Pis: exec ssh-agent bash ssh-add $HOME/.ssh/<name of private key> If I do that, then the next time I S...
by Graymalk
Wed Nov 11, 2015 10:03 pm
Forum: Advanced users
Topic: MPI on Raspberry Pi - problem with logging into devices
Replies: 9
Views: 1634

Re: MPI on Raspberry Pi - problem with logging into devices

Actually, I'm wrong. I can't SSH from the Pi's to the Mac without triggering a password request. Could this be the issue?

They all have each other's public keys so I'm really confused.
by Graymalk
Wed Nov 11, 2015 9:25 pm
Forum: Advanced users
Topic: MPI on Raspberry Pi - problem with logging into devices
Replies: 9
Views: 1634

MPI on Raspberry Pi - problem with logging into devices

Hi, This isn't exactly Raspberry Pi specific but I was hoping people here might know what to do since running MPI on Raspberry Pis is starting to get popular. I am trying to learn MPI and I have a pair of Raspberry Pis that I thought I would use for this. I also have a Mac that I would like to use a...

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