I’ve enabled my Cfengine infrastructure to perform 2 way data transfers. My
clients are configured to run cf-serverd, so my Master Policy Server can login
to pull some files off of each machine. To accomplish this, I execute two
policies.
* policy 1 extracts all the clients the MPS has seen from the lastseen
database and dumps this info to a text file.
* policy 2 reads the text file, and instructs cf-agent on the MPS to loop
through and pull down data from each “client machine” from
/var/cfengine/outgoing.
Here’s policy 2 which executes on my MPS.
bundle agent grab_client_cfreport_output
{
vars:
"host_array_size"
int => readstringarray("host_array",
"/export/apps/cfengine-client-data/active_clients.txt","#[^\n]*","[\n]",999999999,9999999);
"real_machine_name" slist => getindices("host_array");
files:
# This transfers all reporting data from the clients to the Master
Policy Server
"/export/apps/cfengine-client-data/$(real_machine_name)"
handle => "grab_client_data",
copy_from =>
remote_copy("/var/cfengine/outgoing","$(real_machine_name)"),
depth_search => recurse("inf"),
action => immediate;
}
#########################################################
body copy_from remote_copy(sourcedir,sourceserver)
{
source => "$(sourcedir)";
servers => { "$(sourceserver)" };
copy_backup => "false";
purge => "false";
trustkey => "true";
collapse_destination_dir => "true";
encrypt => "true";
}
When this executes, cf-agent holds open a socket for each client it connects
to. It doesn’t close the socket when it moves onto the next machine. The
downside of this, is that this master policy server has to reach out and grab
data from 900 clients, which means I end up with a TON of open file descriptors
with socket information.
I’ve raised ulimit –n (open file descriptors) to 2048, but cf-agent doesn’t
seem very happy.
# ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
open files (-n) 2048
pipe size (512 bytes, -p) 10
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 16357
virtual memory (kbytes, -v) unlimited
Through about 500 client transfers, cf-agent is happy. Then I start hitting
these messages below. The file transfer still succeeds, but it looks nasty.
-> Updated
/export/apps/cfengine-client-data/ela4-cs44.prod/monitor_summary.html from
source /var/cfengine/outgoing/reports/monitor_summary.html on ela4-cs44.prod
-> Updated /export/apps/cfengine-client-data/ela4-cs44.prod/performance.html
from source /var/cfengine/outgoing/reports/performance.html on ela4-cs44.prod
-> Updated /export/apps/cfengine-client-data/ela4-cs44.prod/lastseen.html from
source /var/cfengine/outgoing/reports/lastseen.html on ela4-cs44.prod
-> Updated /export/apps/cfengine-client-data/ela4-cs44.prod/classes.html from
source /var/cfengine/outgoing/reports/classes.html on ela4-cs44.prod
-> Updated /export/apps/cfengine-client-data/ela4-cs44.prod/class_notes from
source /var/cfengine/outgoing/reports/class_notes on ela4-cs44.prod
-> Updated /export/apps/cfengine-client-data/ela4-cs44.prod/audit.html from
source /var/cfengine/outgoing/reports/audit.html on ela4-cs44.prod
-> Updated
/export/apps/cfengine-client-data/ela4-be174.prod/monitor_summary.html from
source /var/cfengine/outgoing/reports/monitor_summary.html on ela4-be174.prod
-> Updated /export/apps/cfengine-client-data/ela4-be174.prod/performance.html
from source /var/cfengine/outgoing/reports/performance.html on ela4-be174.prod
-> Updated /export/apps/cfengine-client-data/ela4-be174.prod/lastseen.html
from source /var/cfengine/outgoing/reports/lastseen.html on ela4-be174.prod
-> Updated /export/apps/cfengine-client-data/ela4-be174.prod/classes.html from
source /var/cfengine/outgoing/reports/classes.html on ela4-be174.prod
-> Updated /export/apps/cfengine-client-data/ela4-be174.prod/class_notes from
source /var/cfengine/outgoing/reports/class_notes on ela4-be174.prod
-> Updated /export/apps/cfengine-client-data/ela4-be174.prod/audit.html from
source /var/cfengine/outgoing/reports/audit.html on ela4-be174.prod
-> Copying from
ela4-be520.prod:/var/cfengine/outgoing/reports/monitor_summary.html
-> Copying from ela4-be520.prod:/var/cfengine/outgoing/reports/performance.html
-> Copying from ela4-be520.prod:/var/cfengine/outgoing/reports/lastseen.html
-> Copying from ela4-be520.prod:/var/cfengine/outgoing/reports/hashes.html
-> Copying from ela4-be520.prod:/var/cfengine/outgoing/reports/classes.html
-> Copying from ela4-be520.prod:/var/cfengine/outgoing/reports/class_notes
-> Copying from ela4-be520.prod:/var/cfengine/outgoing/reports/audit.html
-> Copying from ela4-be520.prod:/var/cfengine/outgoing/cm.conf
Couldn't find a public key (/var/cfengine/ppkeys/root-ela4-be298.prod.pub) -
use cf-key to get one
!!! System error for fopen: "Too many open files"
-> Trusting server identity, promise to accept key from
ela4-be298.prod=172.17.135.198
-> Updated
/export/apps/cfengine-client-data/ela4-be298.prod/monitor_summary.html from
source /var/cfengine/outgoing/reports/monitor_summary.html on ela4-be298.prod
-> Updated /export/apps/cfengine-client-data/ela4-be298.prod/performance.html
from source /var/cfengine/outgoing/reports/performance.html on ela4-be298.prod
-> Updated /export/apps/cfengine-client-data/ela4-be298.prod/lastseen.html
from source /var/cfengine/outgoing/reports/lastseen.html on ela4-be298.prod
-> Updated /export/apps/cfengine-client-data/ela4-be298.prod/classes.html from
source /var/cfengine/outgoing/reports/classes.html on ela4-be298.prod
-> Updated /export/apps/cfengine-client-data/ela4-be298.prod/audit.html from
source /var/cfengine/outgoing/reports/audit.html on ela4-be298.prod
Couldn't read file /var/cfengine/cfagent.ela4-41105-js01.prod.log for editing
!!! System reports error for fopen: "Too many open files"
Couldn't find a public key (/var/cfengine/ppkeys/root-ela4-be420.prod.pub) -
use cf-key to get one
!!! System error for fopen: "Too many open files"
-> Trusting server identity, promise to accept key from
ela4-be420.prod=172.17.137.192
-> Updated /export/apps/cfengine-client-data/ela4-be420.prod/performance.html
from source /var/cfengine/outgoing/reports/performance.html on ela4-be420.prod
-> Updated /export/apps/cfengine-client-data/ela4-be420.prod/lastseen.html
from source /var/cfengine/outgoing/reports/lastseen.html on ela4-be420.prod
-> Updated /export/apps/cfengine-client-data/ela4-be420.prod/classes.html from
source /var/cfengine/outgoing/reports/classes.html on ela4-be420.prod
-> Updated /export/apps/cfengine-client-data/ela4-be420.prod/audit.html from
source /var/cfengine/outgoing/reports/audit.html on ela4-be420.prod
Couldn't read file /var/cfengine/cfagent.ela4-41105-js01.prod.log for editing
!!! System reports error for fopen: "Too many open files"
Couldn't find a public key (/var/cfengine/ppkeys/root-ela4-ss143.prod.pub) -
use cf-key to get one
Running a pfiles on cf-agent, here’s all the open sockets I see. They aren’t
being released after every client transfer, so it piles up in cf-agent.
$ pfiles 5610
5610: /var/cfengine/bin/cf-agent -I -K
Current rlimit: 2048 file descriptors
0: S_IFCHR mode:0620 dev:286,0 ino:12582918 uid:3378 gid:7 rdev:24,1
O_RDWR|O_NOCTTY|O_LARGEFILE
/devices/pseudo/pts@0:1
1: S_IFCHR mode:0620 dev:286,0 ino:12582918 uid:3378 gid:7 rdev:24,1
O_RDWR|O_NOCTTY|O_LARGEFILE
/devices/pseudo/pts@0:1
2: S_IFCHR mode:0620 dev:286,0 ino:12582918 uid:3378 gid:7 rdev:24,1
O_RDWR|O_NOCTTY|O_LARGEFILE
/devices/pseudo/pts@0:1
3: S_IFDOOR mode:0444 dev:295,0 ino:56 uid:0 gid:0 size:0
O_RDONLY|O_LARGEFILE FD_CLOEXEC door to nscd[215]
/var/run/name_service_door
4: S_IFREG mode:0644 dev:30,131 ino:8466 uid:0 gid:1 size:16384
O_RDWR|O_CREAT|O_LARGEFILE FD_CLOEXEC
/var/cfengine/cf_Audit.db
....
........
...
758: S_IFSOCK mode:0666 dev:293,0 ino:2553 uid:0 gid:0 size:0
O_RDWR
SOCK_STREAM
SO_SNDBUF(49152),SO_RCVBUF(49640),IP_NEXTHOP(232.193.0.0)
sockname: AF_INET 172.17.130.245 port: 41914
peername: AF_INET 172.17.137.174 port: 5308
759: S_IFSOCK mode:0666 dev:293,0 ino:17601 uid:0 gid:0 size:0
O_RDWR
SOCK_STREAM
SO_SNDBUF(49152),SO_RCVBUF(49640),IP_NEXTHOP(232.193.0.0)
sockname: AF_INET 172.17.130.245 port: 41915
peername: AF_INET 172.17.137.73 port: 5308
760: S_IFSOCK mode:0666 dev:293,0 ino:44388 uid:0 gid:0 size:0
O_RDWR
SOCK_STREAM
SO_SNDBUF(49152),SO_RCVBUF(49640),IP_NEXTHOP(232.193.0.0)
sockname: AF_INET 172.17.130.245 port: 41916
peername: AF_INET 172.17.138.159 port: 5308
Anyways, is there a way to instruct cf-agent to close the socket when the
copy_from is complete, or does anyone else have a better approach for what I am
trying to accomplish?
Thanks
Mike
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