Merge pull request #41 from aws-samples/solana

Solana updates after testing Extended RPC node in different regions

Author: frbrkoala

lib/solana/README.md

@@ -265,6 +265,31 @@ The result should be like this (the actual balance might change):
     #Delete key pair from the local file system
     rm -rf /tmp/keypair.json
 
+```
+5. How can I add swap space to the instance if my Solana node runs out of RAM during the initial sync?
+
+   There are two ways. Using the existing volume or using a new one. If your instance has Instance Store volume attached, it is better to keep your swap on it.
+
+   - Option 1: Dedicated Instance Store volume
+   
+```bash
+   sudo mkswap /dev/nvme3n1
+   sudo swapon /dev/nvme3n1
+   # Check the memory space is updated
+   free -g
+```
+
+   - Option 2: Existing volume (using Data directory as example):
+
+```bash
+   sudo mkdir /var/solana/data/swapfile
+   sudo dd if=/dev/zero of=/var/solana/data/swapfile bs=1MiB count=250KiB
+   sudo chmod 0600 /var/solana/data/swapfile
+   sudo mkswap /var/solana/data/swapfile
+   sudo swapon /var/solana/data/swapfile
+   free -g
+   sudo sysctl vm.swappiness=10
+
 ```
 
 ## Upgrades

lib/solana/lib/assets/user-data/node.sh

@@ -28,7 +28,7 @@ apt install unzip
 cd /opt
 
 echo "Downloading assets zip file"
-aws s3 cp $ASSETS_S3_PATH ./assets.zip
+aws s3 cp $ASSETS_S3_PATH ./assets.zip --region $AWS_REGION
 unzip -q assets.zip
 
 echo "Install and configure CloudWatch agent"

lib/solana/lib/single-node-stack.ts

@@ -132,7 +132,7 @@ export class SolanaSingleNodeStack extends cdk.Stack {
         })
 
         new cw.CfnDashboard(this, 'solana-cw-dashboard', {
-            dashboardName: STACK_NAME,
+            dashboardName: `${STACK_NAME}-${node.instanceId}`,
             dashboardBody: dashboardString,
         });