From 22256118ea810940d4ff4a32bb444edf6842baea Mon Sep 17 00:00:00 2001
From: root Apostolos <anagnostopoulos@uniwa.gr>
Date: Sat, 20 Jul 2019 00:56:05 +0300
Subject: [PATCH] howto replica

---
 create-replica | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 create-replica

diff --git a/create-replica b/create-replica
new file mode 100644
index 0000000..daea878
--- /dev/null
+++ b/create-replica
@@ -0,0 +1,12 @@
+# connect to PRIMARY
+mongo
+> rs.initiate()
+> rs.status()
+> rs.add("mongo_node2")
+> rs.add("mongo_node3")
+> rs.status()
+> rs.isMaster()
+
+#You now have a working MongoDB replication. 
+#You can increase the cluster size from *three* nodes to *five* nodes, *seven* nodes or more. 
+#This number is calculated from: [Master Eligible Nodes) / 2 + 1], which means an odd number of nodes is required for high availability, the minimum number is *three*.