Hey,
epmd -name gives the following on the nodes.
#node1
ubuntu@node2:~$ sudo epmd -names
epmd: up and running on port 4369 with data:
name riak at port 34358
#node2
ubuntu@node1:~$ sudo epmd -names
epmd: up and running on port 4369 with data:
name riak at port 42643
I can telnet to the 4369 port on both the machines (from each other).
Any ideas.
Thanks
-Abhishek Kona
On 02/02/11 11:27 PM, Jon Meredith wrote:
Hey,
So that shows distributed erlang is not working, next step is to work
out why. The erlang emulator (beam) uses ports for distributed erlang
in addition to the ones riak uses.
You can see which ports using the erlang port mapper. It sits on a
well known port and sets up all the other connection. Run 'empd
-names' from the commandline to see what is set up. Here is my
machine with 3 dev nodes all running at the same time. You'll
probably just have 'name riak' on yours.
$ epmd -names
epmd: up and running on port 4369 with data:
name dev3 at port 56668
name dev2 at port 56657
name dev1 at port 56647
Check you can see the empd port from both sides and the distributed
erlang port (that's what Sean was talking about with the chef recipe).
Jon
On Wed, Feb 2, 2011 at 10:49 AM, Abhishek Kona
<[email protected] <mailto:[email protected]>> wrote:
Hi.
Sorry about that,
I am getting "pang" as a reply.
But is this a network issue?
As I said before I can telnet on to the machines on the Riak ports.
What can be the issues?
Again ,Thanks for all the quick help
-Abhishek Kona
On 02/02/11 10:33 PM, Jon Meredith wrote:
Hi Abhishek,
It looks like distributed erlang isn't working between the nodes
so the join fails.
You can test it by bringing the nodes up in console mode and
executing
$ riak console
[some logging status messages]
Eshell V5.7.5 (abort with ^G)
([email protected]
<mailto:[email protected]>)1> net_adm:ping('[email protected]
<mailto:[email protected]>').
pong
([email protected] <mailto:[email protected]>)3> q().
ok
Make sure you switch the node names for your own and run the test
in both directions. If the node is unreachable it will return
pang instead of ping.
--Jon
Senior Software Engineer
Basho Technologies
On Wed, Feb 2, 2011 at 9:04 AM, Abhishek Kona
<[email protected] <mailto:[email protected]>> wrote:
On 02/02/11 8:38 PM, Sean Cribbs wrote:
Abhishek,
First, make sure all of your nodes are in the same security
group.
Yes, both the machines are on the same security group ( which
has only the ports 8098, 8099, 8087).
Second, check that your OS doesn't have an additional
firewall installed (iptables, for example).
I can telnet into the Riak ports from each of the machines,
so firewall does not seem to be the issue.
Third, you might consider doing what the Chef recipe for
Riak does and limit the ports that Erlang uses for
distributed communication. Adding a section to app.config
like the below will limit the port range:
{kernel, [
{inet_dist_listen_min, 6000},
{inet_dist_listen_max, 7999}
]}
You'll need to stop Riak, kill the "epmd" process, and then
start Riak up again for this change to take effect. Make
sure those ports are also open in your security group and
any software firewall you have.
Tried with these changes as well, but still get the same
message. Anything else, I can try?.
Thanks for the help.
Sean Cribbs<[email protected]> <mailto:[email protected]>
Developer Advocate
Basho Technologies, Inc.
http://basho.com/
On Feb 2, 2011, at 8:47 AM, Abhishek Kona wrote:
Hi folks
I am trying to set up a Riak cluster on EC2.
Each time I issue a command :
$ sudo riak-admin join [email protected]
<mailto:[email protected]>
It fails :
Attempting to restart script through sudo -u riak
Node [email protected] <mailto:[email protected]> is
not reachable!
Netstat on both the machines says the ports are running fine.
netstat -na | egrep '(8087|8098|8099)'
tcp 0 0 0.0.0.0:8098
<http://0.0.0.0:8098> 0.0.0.0:*
LISTEN
tcp 0 0 0.0.0.0:8099
<http://0.0.0.0:8099> 0.0.0.0:*
LISTEN
tcp 0 0 0.0.0.0:8087
<http://0.0.0.0:8087> 0.0.0.0:*
LISTEN
I can telnet to all the ports from each of the machine.
I have been pulling my hair for long but of no avail.
Can any one look and tell me what I am doing wrong.
Are there any debug logs where I can look at what is going
wrong?
Is there any EC2 specific trick (like using public hostnames).
I am attaching my app.cfg file for reference.
Thanks
-Abhishek Kona
<app.cfg>_______________________________________________
riak-users mailing list
[email protected] <mailto:[email protected]>
http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
_______________________________________________
riak-users mailing list
[email protected] <mailto:[email protected]>
http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
_______________________________________________
riak-users mailing list
[email protected]
http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
