Setup XDR to replicate from DC1 to DC2

#1

Setup XDR to replicate from DC1 to DC2

Plan is to do it in two phases.

Phase 1 :

In this phase both XDR stanza and namespace stanzas will be modified in aerospike.conf

We will first add the XDR stanza as follows:

## XDR Stanza Configurations
xdr {
    enable-xdr                   true       # static setting required to be true to start XDR
    namedpipe-path               /tmp/xdr_pipe
    digestlog-path               /etc/aerospike/digestlog 30000000000   #30GB   # circular buffer to hold records digest 
    errorlog-path                /var/log/asdxdr.log
    xdr-pidfile                  /var/run/aerospike/asxdr.pid
    local-node-port              3000
    info-port                    3004
    datacenter DC2 {
        dc-node-address-port Aerospike_Node1 3000
        dc-node-address-port Aerospike_Node2 3000
        dc-node-address-port Aerospike_Node3 3000
    }
}

NAMESPACE configuration

Then Add the following two settings to each namespace: enable-xdr false xdr-remote-datacenter DC2

namespace Namespace1 {
        enable-xdr      false
        xdr-remote-datacenter   DC2
        replication-factor 2
        memory-size 2G
        default-ttl 4d

        storage-engine device {
                file /opt/aerospike/data/file.dat
                filesize 4G
                data-in-memory true
        }

}

namespace Namespace2 {
        enable-xdr      false
        xdr-remote-datacenter   DC2
        replication-factor 2
        memory-size 2G
        default-ttl 4d

        storage-engine device {
                file /opt/aerospike/data/file2.dat
                filesize 4G
                data-in-memory true
        }

}

and do a rolling restart of asd on each nodes to load XDR stanza

This is required to load new XDR static configs into asd.

Phase 2: Enable XDR and Start XDR process from command line :

Enable XDR for replicating namespaces.

asmonitor -e "asinfo -v 'set-config:context=namespace;id=Namespace1;enable-xdr=true'"
asmonitor -e "asinfo -v 'set-config:context=namespace;id=Namespace2;enable-xdr=true'"

Verify XDR is enabled by running asmonitor to get config

asmonitor -e "asinfo -v 'get-config:'"|tr ";" "\n"|egrep ':3000|xdr'
asmonitor -e "asinfo -v 'namespace/Namespace1'"|tr ";" "\n"|egrep ':3000|xdr'
asmonitor -e "asinfo -v 'namespace/Namespace2'"|tr ";" "\n"|egrep ':3000|xdr'

Start XDR on each nodes of DC1

sudo service aerospike_xdr start

Verify XDR status through AMC or via command line

asmonitor -e 'info XDR'

Make changes persistent in aerospike.conf

enable-xdr to true for each of the namespaces being replicated in aerospike.conf for changes to persist after a restart