healthcheck

scripts/website-healthcheck.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+#
+# Check health of relayscan.io and send notifications if state changes
+#
+set -o errexit
+set -o nounset
+set -o pipefail
+
+url="https://www.relayscxan.io/healthz"
+# url="localhost:9060/healthz"
+check_fn="/tmp/relayscan-error.txt"
+
+# load environment variables $PUSHOVER_APP_TOKEN and $PUSHOVER_APP_KEY
+source "$(dirname "$0")/../.env.prod"
+
+function send_notification() {
+        curl -s \
+                --form-string "token=$PUSHOVER_APP_TOKEN" \
+                --form-string "user=$PUSHOVER_APP_KEY" \
+                --form-string "message=$1" \
+                https://api.pushover.net/1/messages.json
+}
+
+function error() {
+    # prevent sending multiple notifications
+    if [ -f $check_fn ]; then
+        return
+    fi
+
+    echo "relayscan.io is unhealthy"
+    send_notification "relayscan.io is unhealthy"
+    curl -vvvv $url > $check_fn 2>&1
+}
+
+function reset() {
+    # Don't run if no error
+    if [ ! -f $check_fn ]; then
+        return
+    fi
+
+    rm $check_fn
+    echo "relayscan.io is healthy again"
+    send_notification "relayscan.io is healthy again"
+}
+
+# allow errors, to catch bad curl exit code
+set +e
+cmd="curl -s $url"
+echo $cmd
+$cmd
+if [ $? -eq 0 ]; then
+    reset
+else
+    echo "curl error"
+    error
+fi