If iptables is your problem, then you should also add a rule to allow
igmp packets, or the switch might drop you from the multicast group when
you don't respond to its igmp queries:
-A DEFAULT-INPUT -p igmp -j ACCEPT
~Jason
On Wed, 2006-03-01 at 11:35 -0500, Raymond Pete wrote:
> Try turning off iptables if you have it loaded. Some newer versions of
> linux iptables block the multicast traffic port. If that fixes it then
> you need to append a similar rule as seen below.
>
> example rule below
>
>
> -A DEFAULT-INPUT -p udp -m udp -s <YOUR IP> -d 239.2.11.71 --dport 8649
> -j ACCEPT
>
>
>
> Ray
>
>
> On Wed, 2006-03-01 at 11:13 -0500, Zhao, Yongsheng wrote:
> > Hello,
> >
> > I installed ganglia 3.0.0 on the head node of my cluster using the rpm
> > files. The installation is fine. However, on the website it shows that
> > the CPUs Total: Hosts up: 0. It seems the ganglia could not see the
> > node. I also tried gstat:
> >
> > [EMAIL PROTECTED] etc]# gstat
> > CLUSTER INFORMATION
> > Name: unspecified
> > Hosts: 0
> > Gexec Hosts: 0
> > Dead Hosts: 0
> > Localtime: Wed Mar 1 10:47:54 2006
> >
> > There are no hosts running gexec at this time
> >
> > And telnet localhost 8649. It didn't show any metrics on the telnet:
> > ...
> > ...
> > <GANGLIA_XML VERSION="3.0.0" SOURCE="gmond">
> > <CLUSTER NAME="unspecified" LOCALTIME="1141228133" OWNER="unspecified"
> > LATLONG="unspecified" URL="unspecified">
> > </CLUSTER>
> > </GANGLIA_XML>
> >
> > I used the default gmond.conf, which is showed as following. Do anyone
> > know what's the problem? Thanks.
> >
> > Yongsheng Zhao
> >
> > gmond.conf:
> > /* This configuration is as close to 2.5.x default behavior as
> > possible
> > The values closely match ./gmond/metric.h definitions in 2.5.x */
> > globals {
> > setuid = yes
> > user = nobody
> > cleanup_threshold = 300 /*secs */
> > }
> >
> > /* If a cluster attribute is specified, then all gmond hosts are
> > wrapped inside
> > * of a <CLUSTER> tag. If you do not specify a cluster tag, then all
> > <HOSTS> will
> > * NOT be wrapped inside of a <CLUSTER> tag. */
> > cluster {
> > name = "unspecified"
> > }
> >
> > /* Feel free to specify as many udp_send_channels as you like. Gmond
> > used to only support having a single channel */
> > udp_send_channel {
> > mcast_join = 239.2.11.71
> > port = 8649
> > }
> >
> > /* You can specify as many udp_recv_channels as you like as well. */
> > udp_recv_channel {
> > mcast_join = 239.2.11.71
> > port = 8649
> > bind = 239.2.11.71
> > }
> >
> > /* You can specify as many tcp_accept_channels as you like to share
> > an xml description of the state of the cluster */
> > tcp_accept_channel {
> > port = 8649
> > }
> >
> >
> > /* The old internal 2.5.x metric array has been replaced by the
> > following
> > collection_group directives. What follows is the default behavior
> > for
> > collecting and sending metrics that is as close to 2.5.x behavior
> > as
> > possible. */
> >
> > /* This collection group will cause a heartbeat (or beacon) to be sent
> > every
> > 20 seconds. In the heartbeat is the GMOND_STARTED data which
> > expresses
> > the age of the running gmond. */
> > collection_group {
> > collect_once = yes
> > time_threshold = 20
> > metric {
> > name = "heartbeat"
> > }
> > }
> >
> > /* This collection group will send general info about this host every
> > 1200 secs.
> > This information doesn't change between reboots and is only
> > collected once. */
> > collection_group {
> > collect_once = yes
> > time_threshold = 1200
> > metric {
> > name = "cpu_num"
> > }
> > metric {
> > name = "cpu_speed"
> > }
> > metric {
> > name = "mem_total"
> > }
> > /* Should this be here? Swap can be added/removed between reboots.
> > */
> > metric {
> > name = "swap_total"
> > }
> > metric {
> > name = "boottime"
> > }
> > metric {
> > name = "machine_type"
> > }
> > metric {
> > name = "os_name"
> > }
> > metric {
> > name = "os_release"
> > }
> > metric {
> > name = "location"
> > }
> > }
> >
> > /* This collection group will send the status of gexecd for this host
> > every 300 secs */
> > /* Unlike 2.5.x the default behavior is to report gexecd OFF. */
> > collection_group {
> > collect_once = yes
> > time_threshold = 300
> > metric {
> > name = "gexec"
> > }
> > }
> >
> > /* This collection group will collect the CPU status info every 20
> > secs.
> > The time threshold is set to 90 seconds. In honesty, this
> > time_threshold could be
> > set significantly higher to reduce unneccessary network chatter. */
> > collection_group {
> > collect_every = 20
> > time_threshold = 90
> > /* CPU status */
> > metric {
> > name = "cpu_user"
> > value_threshold = "1.0"
> > }
> > metric {
> > name = "cpu_system"
> > value_threshold = "1.0"
> > }
> > metric {
> > name = "cpu_idle"
> > value_threshold = "5.0"
> > }
> > metric {
> > name = "cpu_nice"
> > value_threshold = "1.0"
> > }
> > metric {
> > name = "cpu_aidle"
> > value_threshold = "5.0"
> > }
> > metric {
> > name = "cpu_wio"
> > value_threshold = "1.0"
> > }
> > /* The next two metrics are optional if you want more detail...
> > ... since they are accounted for in cpu_system.
> > metric {
> > name = "cpu_intr"
> > value_threshold = "1.0"
> > }
> > metric {
> > name = "cpu_sintr"
> > value_threshold = "1.0"
> > }
> > */
> > }
> >
> > collection_group {
> > collect_every = 20
> > time_threshold = 90
> > /* Load Averages */
> > metric {
> > name = "load_one"
> > value_threshold = "1.0"
> > }
> > metric {
> > name = "load_five"
> > value_threshold = "1.0"
> > }
> > metric {
> > name = "load_fifteen"
> > value_threshold = "1.0"
> > }
> > }
> >
> > /* This group collects the number of running and total processes */
> > collection_group {
> > collect_every = 80
> > time_threshold = 950
> > metric {
> > name = "proc_run"
> > value_threshold = "1.0"
> > }
> > metric {
> > name = "proc_total"
> > value_threshold = "1.0"
> > }
> > }
> >
> > /* This collection group grabs the volatile memory metrics every 40
> > secs and
> > sends them at least every 180 secs. This time_threshold can be
> > increased
> > significantly to reduce unneeded network traffic. */
> > collection_group {
> > collect_every = 40
> > time_threshold = 180
> > metric {
> > name = "mem_free"
> > value_threshold = "1024.0"
> > }
> > metric {
> > name = "mem_shared"
> > value_threshold = "1024.0"
> > }
> > metric {
> > name = "mem_buffers"
> > value_threshold = "1024.0"
> > }
> > metric {
> > name = "mem_cached"
> > value_threshold = "1024.0"
> > }
> > metric {
> > name = "swap_free"
> > value_threshold = "1024.0"
> > }
> > }
> >
> > collection_group {
> > collect_every = 40
> > time_threshold = 300
> > metric {
> > name = "bytes_out"
> > value_threshold = 4096
> > }
> > metric {
> > name = "bytes_in"
> > value_threshold = 4096
> > }
> > metric {
> > name = "pkts_in"
> > value_threshold = 256
> > }
> > metric {
> > name = "pkts_out"
> > value_threshold = 256
> > }
> > }
> >
> > /* Different than 2.5.x default since the old config made no sense */
> > collection_group {
> > collect_every = 1800
> > time_threshold = 3600
> > metric {
> > name = "disk_total"
> > value_threshold = 1.0
> > }
> > }
> >
> > collection_group {
> > collect_every = 40
> > time_threshold = 180
> > metric {
> > name = "disk_free"
> > value_threshold = 1.0
> > }
> > metric {
> > name = "part_max_used"
> > value_threshold = 1.0
> > }
> > }
> >
> >
> >
> >
>
>
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--
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| Jason A. Smith Email: [EMAIL PROTECTED] |
| Atlas Computing Facility, Bldg. 510M Phone: (631)344-4226 |
| Brookhaven National Lab, P.O. Box 5000 Fax: (631)344-7616 |
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