unused aws instace and vpcs cleanup

Signed-off-by: shiva kumar <[email protected]>

scripts/awscleanup.sh

@@ -66,20 +66,29 @@ for sg in $security_groups; do
     aws ec2 delete-security-group --group-id "$sg"
 done
 
-# Delete Route Tables , do not delete Main route table
+# Delete Route Tables
+# 1. Make first rt as Main , as we cannot delete vpcs attached with main
+# 2. replace all rt with first rt
+# 3.delete rt
+first_rt=""
 route_tables=$(aws ec2 describe-route-tables \
     --filters Name=vpc-id,Values=$vpc \
     --query "RouteTables[?Associations[?Main==false]].RouteTableId" \
     --output text | tr -d '\r' | tr '\n' ' ')
 for rt in $route_tables; do
-    associations=$(aws ec2 describe-route-tables \
-        --route-table-ids "$rt" \
-        --query "RouteTables[0].Associations[].RouteTableAssociationId" \
-        --output text | tr -d '\r' | tr '\n' ' ')
-    for assoc in $associations; do
-        aws ec2 disassociate-route-table --association-id "$assoc"
-    done
-    aws ec2 delete-route-table --route-table-id "$rt"
+    if [ -z "$first_rt" ]; then
+        aws ec2 replace-route-table-association --association-id $(aws ec2 describe-route-tables --route-table-id $rt --query "RouteTables[].Associations[].RouteTableAssociationId" --output text) --route-table-id $rt
+        first_rt=$rt
+    else
+        associations=$(aws ec2 describe-route-tables \
+            --route-table-ids "$rt" \
+            --query "RouteTables[].RouteTableId" \
+            --output text | tr -d '\r' | tr '\n' ' ')
+        for assoc_id in $associations; do
+            aws ec2 replace-route-table-association --association-id $assoc_id --route-table-id $first_rt
+        done
+        aws ec2 delete-route-table --route-table-id "$rt"
+    fi
 done
 
 # Delete Subnets