{"id":1058,"date":"2020-03-29T21:54:50","date_gmt":"2020-03-30T02:54:50","guid":{"rendered":"https:\/\/poojanwagh.opalstacked.com\/techblog\/?p=1058"},"modified":"2020-03-29T21:58:14","modified_gmt":"2020-03-30T02:58:14","slug":"folding-at-home-on-freebsd-in-an-iocage-jail","status":"publish","type":"post","link":"https:\/\/tech.poojanblog.com\/blog\/unix-linux\/folding-at-home-on-freebsd-in-an-iocage-jail\/","title":{"rendered":"Folding-at-Home on FreeBSD in an iocage jail"},"content":{"rendered":"\n

Given the urgency for research on the novel COVID-19 virus, I have been running Rosetta@Home and Folding@Home on my Windows machine.<\/p>\n\n\n\n

BOINC (which powers Rosetta@Home) runs reasonably well on FreeBSD with some special instructions.<\/p>\n\n\n\n

I also wanted to run Folding@Home. I currently have a Linux VM in bhyve to do so. But, that is rather inefficient. How bad would it be to run it in a Linux compat jail? Turns out, it’s not too bad.<\/p>\n\n\n\n

Since BOINC is also linux-compat, I basically followed the BOINC instructions<\/a> (translating the instructions from FreeNAS to stock FreeBSD iocage).<\/p>\n\n\n\n

I then installed (within the jail) the rather newly-refreshed<\/a> biology\/linux-foldingathome port.<\/p>\n\n\n\n

Here are step-by-step instructions. I am using VNET jails and assign hosts in the jail to the 192.168.2.0\/24 network attaching to a vnet1.X (X picked by iocage) interface created on the fly by iocage.<\/p>\n\n\n\n

sudo iocage create -n \"fah\" -r 12.1-RELEASE vnet=\"on\" ip4_addr=\"vnet1|192.168.2.21\/24\" interfaces=\"vnet1:bridge1\" defaultrouter=\"192.168.2.1\" resolver=\"search domain.tld;nameserver 192.168.2.1\" boot=\"on\"<\/pre>\n\n\n\n
Get a console to the jail with:<\/p>\n\n\n\n
sudo iocage console fah<\/pre>\n\n\n\n
Within the jail (root console from previous command), I ran<\/p>\n\n\n\n
env ASSUME_ALWAYS_YES=YES pkg bootstrap\npkg update\npkg upgrade\nportsnap fetch\nportsnap extract          # takes a while to extract all ports directories\nBuilding new INDEX files\u2026 done.<\/code><\/pre>\n\n\n\n
Then, it’s time to build the new biology\/linux-foldingathome, which basically encapsulates the recipe here<\/a>.<\/p>\n\n\n\n
cd \/usr\/ports\/biology\/linux-foldingathome\nmake config      # I left defaults (of building DOCS)<\/pre>\n\n\n\n
To save a build dependency, I used the same process as the BOINC instructions: use pkg to get as many as possible. In this case, linux-base-c7 is the only one:<\/p>\n\n\n\n
pkg install linux_base-c7\nmake\nmake install <\/pre>\n\n\n\n
Now, I edited \/usr\/local\/etc\/fahclient\/config.xml and updated my username and passkey. I deferred joining Team FreeBSD (team #11743) until I know things are working correctly.<\/p>\n\n\n\n
I also added the following lines to the config file to allow access within my trusted network (192.168.1.0\/24):<\/p>\n\n\n\n<allow> 127.0.0.1 192.168.1.0\/24<\/allow>
\n<web-allow>127.0.0.1 192.168.1.0\/24<\/web-allow>
\n<password>p@33w0r6<\/password><\/code>\n\n\n\n
Enable the fahclient service<\/p>\n\n\n\n
sysrc fahclient_enable=\"YES\"<\/pre>\n\n\n\n
Now, exit the jail’s console. For some reason I did not have linsysfs loaded (yet), so I had to load it. (I am copying all the things that were previously loaded in the BOINC instructions here):<\/p>\n\n\n\n
sudo kldload linsysfs\nsudo kldload linux\nsudo kldload linux64\nsudo sysctl security.bsd.unprivileged_idprio=1<\/pre>\n\n\n\n
To make it permanent, add load_linsysfs=”YES” to \/boot\/loader.conf, linux_load=”YES” to \/etc\/rc.conf, and security.bsd.unprivileged_idprio=1 to \/etc\/sysctl.conf. (I already had it added.)<\/p>\n\n\n\n
Set up the correct entries in the Jail’s fstab:<\/p>\n\n\n\n
sudo iocage fstab -e fah<\/pre>\n\n\n\n
Update to look as follows (change the absolute path to correspond to where your iocage jail sits in the host environment):<\/p>\n\n\n\n
proc                 \/tank\/iocage\/jails\/fah\/root\/proc                   procfs          rw        0       0\nlinproc              \/tank\/iocage\/jails\/fah\/root\/compat\/linux\/proc      linprocfs       rw        0       0\nlinsysfs             \/tank\/iocage\/jails\/fah\/root\/compat\/linux\/sys       linsysfs        rw        0       0<\/pre>\n\n\n\n
Now, it’s time to try it out:<\/p>\n\n\n\n
sudo iocage stop fah\nsudo iocage start fah\nsudo iocage console fah\n# Now you're in the jail's console\/shell prompt:\nservice fahclient log<\/pre>\n\n\n\n
Hopefully, you should see something informative, and your CPU usage should start going up with assigned work.<\/p>\n\n\n\n
See my stats here<\/a>.<\/p>\n<\/p>