I am trying to configure two node(node1 and node2 HA cluster using pacemaker on centos 7. I executed below steps on both nodes
yum install pcs
systemctl enable pcsd.service pacemaker.service corosync.service
systemctl start pcsd.service
passwd hacluster
After that execute below command on node1
pcs cluster auth node1 node2
i am getting below error
Error: Unable to communicate with node2 Error: Unable to
communicate with node1
I have also verified that both nodes are listening on port 2224 and also used telnet to verify that both nodes are able to connect to each other on 2224.
Need help.
The issue got resolved after using FQDN instead of hostname(node1.demo.in, node2.demo.in). below command worked fine.
pcs cluster auth node1.demo.in node2.demo.in
Don't know exact cause for this. Any Idea?
Related
Followed this article
https://medium.com/#vipin.pratap18/rabbitmq-cluster-on-aws-ec2-with-high-availability-1bcd3f8a6404
But while doing sudo rabbitmqctl join_cluster rabbit#
facing issue
DIAGNOSTICS
attempted to contact: [rabbit#rabbitmqnode1]
rabbit#rabbitmqnode1:
connected to epmd (port 4369) on rabbitmqnode1
epmd reports node 'rabbit' uses port 25672 for inter-node and CLI tool traffic
TCP connection succeeded but Erlang distribution failed
Node name (or hostname) mismatch: node "rabbit#ip-xxxxx" believes its node name is not "rabbit#ip-xxxxx" but something else.
All nodes and CLI tools must refer to node "rabbit#ip-10-0-1-122" using the same name the node itself uses (see its logs to find out what it is)
I solved it by following the logs itself
it clearly says "CLI tools must refer to node "rabbit#ip-10-0-x-xxx" using the same name the node itself uses"
while passing the cluster node name i was doing it wrong
NOTE : added hostname from cat /etc/hosts
did like below
sudo rabbitmqctl join_cluster rabbit#ip-10-0-x-yyy
and it worked
suucessfull message "Clustering node rabbit#ip-10-0-x-xxx with rabbit#ip-10-0-x-yyy"
I'm trying to follow MonetDB docs on Cluster Management
to setup a 3 nodes cluster using 3 Centos machines, I created the 3 dbfarm using monetdbd create /path/to/mydbfarm and from the first node, I run monetdb discover and it returns nothing where it should discover the other nodes, and when I try to run monetdb -h [second node IP] -P mypasshphrase status it returns the following error
status: cannot connect: Connection refused
PS: I have a passwordless connection between these 3 nodes, ssh [any node IP] works just fine,
Thank you
By default MonetDB listens only for local connections. This is for security reasons.
To listen also for remote connections, run
monetdbd set listenaddr=0.0.0.0 .../path/to/dbfarm
on each of the nodes and restart monetdbd.
I installed Hadoop (HDP 2.5.3) on 4 VMs with Ambari (1 Ambari Server and 3 Ambari Clients; with the DNS entries server, node0, node1, node2) with HDFS, YARN, MapReduce and Zookeeper.
However, YARN doesn't want to start. When starting the Resource Manager on node1 I get the following error:
resource_management.core.exceptions.ExecutionFailed: Execution of 'curl -sS -L -w '%{http_code}' -X GET 'http://node0:50070/webhdfs/v1/ats/done/?op=GETFILESTATUS&user.name=hdfs' 1>/tmp/tmpgsiRLj 2>/tmp/tmpMENUFa' returned 7. curl: (7) Failed to connect to node0 port 50070: connection refused 000
App Timeline Server and History Server on node1 don't want to start either. Zookeeper, NameNode, DataNode and Nodemanager on Node0 is up. The nodes can reach each other (tried with ping) so that shouldn't be the problem.
Hopefully one can help me. I'm really new to this topic and not really familiar with the system.
You should check the host file (/etc/hosts), see the host name and FNDN, check if there any duplicates name, IP address.
Could you also confirm the firewall activity by steps:
sudo ufw status
And also check the port in iptables (or allow port in firewall: udp, tcp).
I have 6 machines mesos cluster (3 masters and 3 slaves), I acces to mesos User interface 172.16.8.211:5050 and it works correctly and redirect to the leader if it is not. Then If I access to marathon User interface 172.16.8.211:8080 it works correctly. Summing before configuring and executing the consul-cluster marathon works well.
My problem is when I configure and run a consul cluster with 3 servers that are the mesos masters and 3 clients that are the mesos slaves. If I execute consul members it is fine, all the members alive and working together.
But now if I try to access to marathon User interface I can't, and I access to mesos User interface and I go to 'Frameworks' and does not appear marathon Framework.
ikerlan#client3:~$ consul members
Node Address Status Type Build Protocol DC
client3 172.16.8.216:8301 alive client 0.5.2 2 nyc2
client2 172.16.8.215:8301 alive client 0.5.2 2 nyc2
server2 172.16.8.212:8301 alive server 0.5.2 2 nyc2
server3 172.16.8.213:8301 alive server 0.5.2 2 nyc2
client1 172.16.8.214:8301 alive client 0.5.2 2 nyc2
server1 172.16.8.211:8301 alive server 0.5.2 2 nyc2
In Slaves tab of mesos I could see the next:
-Mesos version: 0.27.0
-Marathon version: 0.15.1
I have the next file logs, where would appear something related with this issue?
What could be the problem?
Solution:
I have see in the marathon logs '/var/log/syslog' that the problem is a problem of DNS. So I try to add the IPs of the other hosts of the cluster to the file /etc/hosts. And it resolv the problem, now it works perfectly.
You can add all the cluster hosts to the zookeeper config file, it would work
can someone who has successfully settup a mesos development cluster on google cluster help me out.. i have the clutser running however I am having a hard time creating a vpn to conect to the clutser even though I have openvpn installed on my machine and I have downloded the openvpn file provided by mesos. I am using ubuntu 14. basically i have followed instruction to create the cluster but in order to access mesos, marathon I need to configure a vpn connection by using the openvpn file provided by mesosphere but I do not how to do it on ubuntu 14..
Have you tried openvpn --config <file.ovpn>?