Why can only see one node after reboot the primary node in a cluster with pacemaker and corosync?

Question

I created two nodes on CentOS 7:

• node1: 192.168.0.1
• node2: 192.168.0.2

Installed such tools:

# yum install -y pacemaker corosync pcs crmsh

Also did load balancer with HAProxy.

After I did all the things well, I reboot node1 to test high availability. When node1 booted, from this way can only see one node:

# pcs status corosync

This can see two nodes:

# crm status

But the other one is UNCLEAN!

Stack: corosync
Current DC: node1 (version 1.1.15-11.el7_3.5-e174ec8) - partition WITHOUT quorum

2 nodes and 0 resources configured

Node node2: UNCLEAN (offline)
Online: [ node1 ]

No resources

From node2 to check status, also the another one is UNCLEAN!

Stack: corosync
Current DC: node2 (version 1.1.15-11.el7_3.5-e174ec8) - partition WITHOUT quorum

2 nodes and 0 resources configured

Node node1: UNCLEAN (offline)
Online: [ node2 ]

No resources

How to deal with it?

---

Addition

I did this:

# pcs property set stonith-enabled=false

The corosync config:

totem {
    version: 2
    secauth: off
    cluster_name: lbcluster
    transport: udpu
}

nodelist {
    node {
        ring0_addr: node1
        nodeid: 1
    }

    node {
        ring0_addr: node2
        nodeid: 2
    }
}

quorum {
    provider: corosync_votequorum
    two_node: 1
}

logging {
    to_logfile: yes
    logfile: /var/log/cluster/corosync.log
    to_syslog: yes
}

Answer 1

Let UDP 5404 and 5405 through the firewall; those are the ports that Corosync will want to use to communicate by default.