Hello, I want to launch a Clustering for my Apache Web Server. I have three servers:
1- Main server that acts as a Reverse Proxy 2- The secondary server that when my main server stopped, work as a Reverse Proxy 3- Apache Web Server The client ---> Reverse Proxy Server ---> Apache Web Server The IP addresses are: Main Server (node1) : 192.168.1.3 Secondary Server (node2) : 192.168.1.10 Apache Web Server (node3) : 192.168.1.4 On the main and secondary servers, I installed and configured Apache as a Reverse Proxy Server. I created a Virtual Host and my Reverse Configuration is: <VirtualHost *:80> ProxyPreserveHost On ProxyPass / http://192.168.1.4/ ProxyPassReverse / http://192.168.1.4/ </VirtualHost> As you see, it forward all requests to the Apache Web Server. I installed and configured Corosync and Pacemaker as below: On the main and secondary servers, I opened "/etc/hosts" files and added my servers IP addresses and host names: 192.168.1.3 node1 192.168.1.10 node2 Then installed Pacemaker, Corosync, and Pcs packages on both servers and started its service: $ sudo yum install corosync pacemaker pcs $ sudo systemctl enable pcsd $ sudo systemctl start pcsd $ sudo systemctl status pcsd Then Configured the firewall on both servers as below: $ sudo firewall-cmd --permanent --add-service=http $ sudo firewall-cmd --permanent --add-service=high-availability $ sudo firewall-cmd --reload After it, on both servers, I created a password for the "hacluster" user, then on the main server: $ sudo pcs host auth node1 node2 -u hacluster -p password node1: Authorized node2: Authorized Then: $ sudo pcs cluster setup mycluster node1 node2 --start --enable $ sudo pcs cluster enable --all node1: Cluster Enabled node2: Cluster Enabled After it: $ sudo pcs cluster start --all node1: Starting Cluster... node2: Starting Cluster... I checked my clusters with below command and they are up and running: $ sudo pcs status ... Node List: * Online: [ node1 node2 ] .... And finally, I tried to add a resource: $ sudo pcs resource create floating_ip ocf:heartbeat:IPaddr2 ip=192.168.1.4 cidr_netmask=24 op monitor interval=5s $ sudo pcs resource create http_server ocf:heartbeat:apache configfile="/etc/httpd/conf.d/VirtualHost.conf" op monitor timeout="5s" interval="5s" On both servers (Main and Secondary), pcsd service is enabled, but when I want to see my Apache Web Server then it show me below error: Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the request Reason: Error reading from remote server Why? Which parts of my configuration is wrong? The output of "sudo pcs status" command is: https://paste.ubuntu.com/p/V9KvHKwKtC/ Thank you. _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/