Use resend instead of sendgrid for emails

s3-sync-backup.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/bash 
+# Script for syncing backup to remote object storage (S3 based) using rclone.
+
+# Default values
+local_path=""
+remote_path=""
+email_from=""
+email_name=""
+email_to=""
+send_email_script_path=""
+
+print_usage () {
+   echo "Usage: "$0" -l LOCAL_PATH -r REMOTE_PATH -f EMAIL_FROM -n EMAIL_NAME -t EMAIL_TO -s SEND_EMAIL_SCRIPT_PATH"
+   echo "LOCAL_PATH - local path to sync"
+   echo "REMOTE_PATH - remote path in format remote:bucket/path"
+   echo "EMAIL_FROM - sender's email address"
+   echo "EMAIL_NAME - sender's name"
+   echo "EMAIL_TO - recipient's email adress"
+   echo "SEND_EMAIL_SCRIPT_PATH - a path to the send email script (default: /etc/send-email.sh)"
+}
+
+while getopts "l:r:f:n:t:s:h" opt
+do
+   case $opt in
+      l)
+         local_path="${OPTARG}";;
+      r)
+         remote_path="${OPTARG}";;
+      f)
+         email_from="${OPTARG}";;
+      n)
+         email_name="${OPTARG}";;
+      t)
+         email_to="${OPTARG}";;
+      s)
+         send_email_script_path="${OPTARG}";;
+      h)
+         print_usage
+         exit 3
+         ;;
+   esac
+done
+
+# Check if script for sending emails is in place
+if [[ ! -f $send_email_script_path ]]; then
+    echo "Script \"$send_email_script_path\" does not exist"
+    exit 1
+fi
+
+# Run script and capture time and exit code
+start_time=$(date +'%Y-%m-%d %H:%M:%S')
+rclone sync ${local_path} ${remote_path} --log-file=/var/log/rclone-backup.log --log-level INFO
+exit_code="$?"
+end_time=$(date +'%Y-%m-%d %H:%M:%S')
+
+# Send email notification with sync status
+email_message="Start time: ${start_time}\nEnd time: ${end_time}"
+status="SUCCESSFUL"
+
+if [[ $exit_code -ne 0 ]]; then
+    status="FAILED"
+fi
+
+${send_email_script_path} -f ${email_from} -n ${email_name} -t ${email_to} -s "Backup sync to S3 status: ${status}" -m "${email_message}"

send-email.sh

@@ -1,62 +1,69 @@
-#!/usr/bin/bash 
-# Simple script to send email notifications via the Sendgrid API.
+#!/usr/bin/bash
 
-sg_key_file="./sg_key"
+# Default values
+email_from=""
+email_name=""
+email_to=""
+subject=""
+message=""
+script_dir="$(dirname $0)"
+key_file="$script_dir/email_api_key"
 
 print_usage () {
-   echo "Usage: "$0" -f EMAIL_FROM -n EMAIL_NAME -t EMAIL_TO -s SUBJECT -m MESSAGE [-k SG_KEY_FILE]"
+   echo "Usage: "$0" -f EMAIL_FROM -n EMAIL_NAME -t EMAIL_TO -s SUBJECT -m MESSAGE [-k KEY_FILE]"
    echo "EMAIL_FROM - sender's email address"
    echo "EMAIL_NAME - sender's name"
    echo "EMAIL_TO - recipient's email adress"
-   echo "SG_KEY_FILE - a path to the file with Sendgrid API key (default: ./sg_key)"
+   echo "KEY_FILE - a path to the file with API key (default: ./email_api_key)"
 }
 
 send_email () {
    maildata='{"personalizations": [{"to": [{"email": "'${email_to}'"}]}],"from": {"email": "'${email_from}'",
    "name": "'${email_name}'"},"subject": "'${subject}'","content": [{"type": "text/plain", "value": "'${message}'"}]}'
    
-   curl -X "POST" "https://api.sendgrid.com/v3/mail/send" \
-      -H "Authorization: Bearer $sg_key" \
+   curl -X "POST" "https://api.resend.com/emails" \
+      -H "Authorization: Bearer $api_key" \
       -H "Content-Type: application/json" \
       -d "$maildata"
 }
 
-while getopts "f:n:t:s:m:k:h" opt
+while getopts "k:t:n:s:m:f:h" opt
 do
    case $opt in
-      f)
-         email_from="${OPTARG}";;
-      n)
-         email_name="${OPTARG}";;
+      k)
+         key_file="${OPTARG}";;
       t)
          email_to="${OPTARG}";;
+      n)
+         email_name="${OPTARG}";;
       s)
          subject="${OPTARG}";;
       m)
          message="${OPTARG}";;
-      k)
-         sg_key_file="${OPTARG}";;
+      f)
+         email_from="${OPTARG}";;
       h)
-         print_usage
-         exit 3
-         ;;
+        print_usage
+         exit 0;
+      ;;
    esac
 done
 
-if [[ ! -f $sg_key_file ]]; then
-    echo "API key file \"$sg_key_file\" does not exist"
-    exit 1
+if [[ ! -f $key_file ]]; then
+    echo "API key file "${OPTARG}" does not exist"
+    exit 1;
 fi
 
-if [[ "$(stat -c "%a" $sg_key_file)" != "400" ]]; then
+if [[ "$(stat -c "%a" $key_file)" != "400" ]]; then
     echo "Unsafe API key file permissions"
-    exit 1
+    exit 1;
 fi
 
-if [[ "$(wc -l $sg_key_file | cut -d" " -f1)" != "1" ]]; then
-   echo "Wrong API key format"
-   exit 1
+if [[ "$(wc -l $key_file | cut -d" " -f1)" != 1 ]]; then
+   echo "Wrong API key file format"
+   exit 1;
 fi
 
-sg_key="$(cat $sg_key_file)"
+api_key="$(cat $key_file)"
+
 send_email