🔁 All Manual Solr Replication with OpenSolr

Looking to set up Solr replication the old-school way—with style, security, and a splash of manual elbow grease? You've come to the right place. Let's do it properly, like grandpa used to replicate XML configs—by hand. 🧤

🔐 Secure Solr Replication via HTTPS

To configure secure replication between two OpenSolr indexes, paste the following configurations into your respective solrconfig.xml files for master and slave.

🧑‍🏫 Master Configuration

<requestHandler name="/replication" class="solr.ReplicationHandler" >
    <lst name="master">
        <str name="replicateAfter">startup</str>
        <str name="replicateAfter">commit</str>
        <!--If configuration files need to be replicated give the names here, separated by comma -->
        <str name="confFiles">schema.xml,stopwords.txt,elevate.xml</str>
        <str name="maxNumberOfBackups">0</str>
    </lst>
</requestHandler>

🧑‍💼 Slave Configuration

<requestHandler name="/replication" class="solr.ReplicationHandler" >
    <lst name="slave">
        <str name="masterUrl">https://SRV.OPENSOLR.COM/SOLR/YOUR_MASTER_INDEX_NAME</str>
        <str name="pollInterval">00:00:5</str>
        <str name="httpBasicAuthUser">a</str>
        <str name="httpBasicAuthPassword">a</str>
    </lst>
</requestHandler>

🧠 Don’t Forget Network Access

Make sure your master and slave indexes can communicate. That means granting access by IP:

1. On the master, allow /replication access for the slave server's IP.
   (Use ping SLAVE_SERVER_HOSTNAME to find it.)
2. On the slave, allow /replication access for the master server's IP.
   (You guessed it—ping MASTER_SERVER_HOSTNAME.)

🌍 Example Scenario

Let’s say you’re replicating between two indexes:

• index.A at fr.opensolr.com
• index.A_REPLICA at uk2.opensolr.com

✅ Add the above XML snippets to each solrconfig.xml accordingly.
✅ Run ping fr.opensolr.com and ping uk2.opensolr.com to get their IPs.
✅ Grant those IPs access in each other’s firewall or OpenSolr control panel.
✅ Ensure identical schema.xml files on both ends. No cheating.

📞 Questions?

Reach out to us at OpenSolr Contact Page — we don't bite, and we definitely know replication.

▶️ Video Tutorial

Here’s the quick visual walkthrough for all this, for those who prefer the popcorn 🍿 approach: