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Hello everybody,
I am trying to run the ultramonkey release of ldirectord as a standalone
process on a Fedora Core 1 box to do load-balancing between
http servers.
I got everything set up but am having problems getting the response from the
pool server.
The same ldirectord server is running other instances of ldirectord in
connection with heartbeat (ultramonkey) and working fine
there, so kernel and other basic things on te box should generally not cause
any problems for ldirectord...
For my below tests, heartbeat and the connected ldirectord processes are shut
down. The only ldirectord instance running is the
standalone-one that has the problem. Also, the tests are ran with iptables on
all nodes deactivated, so this should not be a
firewall issue.
My basic test setup is just a two-node setup:
LVD1 -----> webserv1
LVD1 has several interfaces, one of them is "eth0:lb1" listening to
192.168.101.24.
One of webserv1's interfaces is 192.168.101.64
The full interface lists and ldirectord configuration are attached at the end.
I noticed a really high traffic volume and error rate compared to the other
interfaces and am not sure where that would come from,
unless it is from the periodic negotiation checks that ldirectord is running to
find out which nodes are active.
If everything was working as planned, I should be able to do "curl
<http://192.168.101.24> http://192.168.101.24"; on webserv1 and
get the welcome page served by webserv1, running a loop over LVD1's ldirectord
instance. At least this is what I want, but I don't
seem to be able to get this working:
When I try "curl <http://192.168.101.24> http://192.168.101.24"; on webserv1, I
get a timeout and iptraf on webserv1 shows:
|+192.168.101.64:53532 = 2
120 S--- eth0 |
|+192.168.101.24:80 = 0
0 ---- eth0 |
|+192.168.101.64:53532 = 2
120 S--- eth0 |
|+192.168.101.64:80 = 0
0 ---- eth0 |
So it seems like LVD1 does the forwarding to webserv1 correctly, but webserv1
does not accept the connection (Only an "S" but no "A"
in the status flags).
"curl <http://192.168.101.64> http://192.168.101.64"; does return the regular
result however, no matter if I call this on webserv1
or another node in the subnet, so apache is running and working fine on
webserv1...
If I try to to "curl <http://192.168.101.24> http://192.168.101.24"; on lvd1
directly, I get a 111 socket error if httpd on LVD1 is
NOT running and a response coming from LVD1 if httpd IS running. This is odd
too, since I would have expected ldirectord to pick up
the traffic and forward it out... however, iptraf on LVD1 shows that the
traffic is going through the local interface ("lo") and not
the real eth0 interface, which may be an explanation for this part...
my ldirectord configuration is this:
----------------------------------------------
checktimeout=5
checkinterval=20
fallback=127.0.0.1:80
autoreload=yes
quiescent=no
# IP for all webservers
virtual=192.168.101.24:80
real=192.168.101.64:80 masq
# real=192.168.102.64:80 masq
# real=192.168.101.65:80 masq
# real=192.168.102.65:80 masq
service=http
request="pooling_status.html"
receive="pooling ok"
scheduler=rr
protocol=tcp
#virtual=192.168.102.24:80
# real=192.168.101.64:80 masq
# real=192.168.102.64:80 masq
# real=192.168.101.65:80 masq
# real=192.168.102.65:80 masq
# service=http
# request="pooling_status.html"
# receive="pooling ok"
# scheduler=rr
# protocol=tcp
----------------------------------------------
I commented out all interfaces except one to make debugging with iptraf easier.
The log looks like ldirectord is working fine:
[Thu Sep 15 09:44:24 2005|ldirectord.httpd.cf] Starting Linux Director
v1.77.2.5 as daemon
[Thu Sep 15 09:44:24 2005|ldirectord.httpd.cf] Added virtual server:
192.168.101.24:80
[Thu Sep 15 09:44:24 2005|ldirectord.httpd.cf] Added fallback server:
127.0.0.1:80 ( x 192.168.101.24:80) (Weight set to 1)
[Thu Sep 15 09:44:25 2005|ldirectord.httpd.cf] Added real server:
192.168.101.64:80 ( x 192.168.101.24:80) (Weight set to 1)
[Thu Sep 15 09:44:25 2005|ldirectord.httpd.cf] Deleted fallback server:
127.0.0.1:80 ( x 192.168.101.24:80)
Interfaces of LVD1
eth0 Link encap:Ethernet HWaddr 00:50:8B:8F:BA:AC
inet addr:192.168.101.20 Bcast:192.168.101.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:20955 errors:0 dropped:0 overruns:0 frame:0
TX packets:29582 errors:0 dropped:0 overruns:0 carrier:0
collisions:1536 txqueuelen:1000
RX bytes:2417345 (2.3 Mb) TX bytes:4827852 (4.6 Mb)
Interrupt:5 Base address:0x3000
eth0:lb1 Link encap:Ethernet HWaddr 00:50:8B:8F:BA:AC
inet addr:192.168.101.24 Bcast:192.168.101.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:809578 errors:0 dropped:0 overruns:0 frame:0
TX packets:732558 errors:2762 dropped:0 overruns:0 carrier:2766
collisions:70061 txqueuelen:1000
RX bytes:1015654548 (968.6 Mb) TX bytes:57431932 (54.7 Mb)
Interrupt:5 Base address:0x3000
eth1 Link encap:Ethernet HWaddr 00:00:F8:1A:EB:F0
inet addr:192.168.102.20 Bcast:192.168.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:15234 errors:0 dropped:0 overruns:0 frame:0
TX packets:13541 errors:3 dropped:0 overruns:0 carrier:2
collisions:0 txqueuelen:1000
RX bytes:2422841 (2.3 Mb) TX bytes:2479321 (2.3 Mb)
Interrupt:5 Base address:0x7c80
eth1:lb1 Link encap:Ethernet HWaddr 00:00:F8:1A:EB:F0
inet addr:192.168.102.24 Bcast:192.168.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:809579 errors:0 dropped:0 overruns:0 frame:0
TX packets:732559 errors:2762 dropped:0 overruns:0 carrier:2766
collisions:70063 txqueuelen:1000
RX bytes:1015656062 (968.6 Mb) TX bytes:57431998 (54.7 Mb)
Interrupt:5 Base address:0x7c80
eth2 Link encap:Ethernet HWaddr 00:00:F8:1A:EB:F1
<public IP> Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:809580 errors:0 dropped:0 overruns:0 frame:0
TX packets:732561 errors:2762 dropped:0 overruns:0 carrier:2766
collisions:70063 txqueuelen:1000
RX bytes:1015657576 (968.6 Mb) TX bytes:57433590 (54.7 Mb)
Interrupt:10 Base address:0x6c00
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:418 errors:0 dropped:0 overruns:0 frame:0
TX packets:418 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:105838 (103.3 Kb) TX bytes:105838 (103.3 Kb)
webserv1 is listening to
eth0 Link encap:Ethernet HWaddr 00:0F:1F:F7:A2:9A
inet addr:192.168.101.64 Bcast:192.168.101.255 Mask:255.255.255.0
inet6 addr: fe80::20f:1fff:fef7:a29a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:15263681 errors:0 dropped:0 overruns:0 frame:0
TX packets:7534916 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2125453772 (1.9 GiB) TX bytes:1049040739 (1000.4 MiB)
Base address:0xece0 Memory:fe1e0000-fe200000
eth0:1 Link encap:Ethernet HWaddr 00:0F:1F:F7:A2:9A
inet addr:192.168.101.128 Bcast:192.168.101.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Base address:0xece0 Memory:fe1e0000-fe200000
eth1 Link encap:Ethernet HWaddr 00:0F:1F:F7:A2:9B
inet addr:192.168.102.64 Bcast:192.168.102.255 Mask:255.255.255.0
inet6 addr: fe80::20f:1fff:fef7:a29b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:16341326 errors:0 dropped:0 overruns:0 frame:0
TX packets:11375497 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2440254563 (2.2 GiB) TX bytes:1480973231 (1.3 GiB)
Base address:0xdcc0 Memory:fdee0000-fdf00000
eth1:1 Link encap:Ethernet HWaddr 00:0F:1F:F7:A2:9B
inet addr:192.168.102.128 Bcast:192.168.102.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Base address:0xdcc0 Memory:fdee0000-fdf00000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:28366 errors:0 dropped:0 overruns:0 frame:0
TX packets:28366 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3854025 (3.6 MiB) TX bytes:3854025 (3.6 MiB)
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