update dns on spawn

create-linode.sh

@@ -15,6 +15,11 @@ SCRIPT_ACTION=$1
 LINODE_LABEL=$2
 LOGFILE="./linodes.log"
 
+# Set to "true" by any action that should also refresh the valheim A record.
+# The create action sets this so it reuses the DNS update block below instead
+# of duplicating the record-updating logic.
+UPDATE_A_RECORD="false"
+
 # Pre-existing Valheim volume, attached to every Linode at creation time.
 # The filesystem (mkfs.ext4) was already created; see voldirections.txt.
 VOLUME_ID="18073448"
@@ -40,12 +45,13 @@ if [[ "$SCRIPT_ACTION" == "" || "$SCRIPT_ACTION" == "--help" || "$SCRIPT_ACTION"
   echo "Linode helper script: create-linode.sh <action> <label> [args]"
   echo "Create:  create-linode.sh c <new label>"
   echo "         (fixed size: 8GB shared, newest Debian image;"
-  echo "          attaches and mounts volume $VOLUME_NAME)"
+  echo "          attaches and mounts volume $VOLUME_NAME;"
+  echo "          also refreshes the valheim A record)"
   echo "Destroy: create-linode.sh d <label>"
   echo "Connect: create-linode.sh x <label>"
   echo "         create-linode.sh x <label> get <remote source> <local dest>"
   echo "         create-linode.sh x <label> put <local source> <remote dest>"
-  echo "Update record: create-linode.sh a <label> <subdomain>"
+  echo "Update record: create-linode.sh a <label>"
   echo "         (updates the existing A record, creates one if missing)"
   echo "List:    create-linode.sh l"
   echo "         (lists all Linodes, no label needed)"
@@ -54,6 +60,10 @@ fi
 # Create
 if [[ "$SCRIPT_ACTION" == "c" ]]; then
 
+  # Creating a Linode also refreshes the valheim A record, reusing the update
+  # block at the bottom of this script.
+  UPDATE_A_RECORD="true"
+
   # Fixed size: 8GB shared, newest Debian image
   INSTANCE_SIZE="g6-standard-4"
   INSTANCE_IMAGE="linode/debian13"
@@ -170,11 +180,13 @@ if [[ "$SCRIPT_ACTION" == "x" ]]; then
 fi
 
 # Update record
-if [[ "$SCRIPT_ACTION" == "a" ]]; then
+# Runs for the explicit "a" action, and also after a create because the create
+# block above sets UPDATE_A_RECORD="true".
+if [[ "$SCRIPT_ACTION" == "a" || "$UPDATE_A_RECORD" == "true" ]]; then
 
   INSTANCE_IP=$(curl -s -H "Authorization: Bearer $LINODE_API_KEY" https://api.linode.com/v4/linode/instances | jq '.data[] | select(.label == "'$LINODE_LABEL'") | .ipv4[]' | sed -e "s/\"//g")
 
-  NI_SUBDOMAIN=$3
+  NI_SUBDOMAIN="valheim"
   DOMAIN_RECORDS=$(curl -s -H "Authorization: Bearer $LINODE_API_KEY" \
     https://api.linode.com/v4/domains/$WHICH_DOMAIN/records)
 
@@ -195,7 +207,7 @@ if [[ "$SCRIPT_ACTION" == "a" ]]; then
 
   echo "Updating records with ip $INSTANCE_IP..."
 
-  #ni7ne:
+  #update record:
   if [[ -n "$RECORD_ID" ]]; then
     curl -s -H "Content-Type: application/json" \
       -H "Authorization: Bearer $LINODE_API_KEY" \