New Script: Prometheus Alertmanager (#1272)

* New Script: Prometheus Alertmanager

* Alertmanager: Append v before Release-Version

* Alertmanager: Switch to `/opt` before updating release

* Alertmanager: Split `var_tags` by `;`

* Alertmanager: Change installation of curl, sudo and mc to a oneliner

Co-authored-by: Michel Roegl-Brunner <73236783+michelroegl-brunner@users.noreply.github.com>

* Alertmanager: Set correct copyright

* Alertmanager: Change the way how the systemd unit file is written to disk

Co-authored-by: Michel Roegl-Brunner <73236783+michelroegl-brunner@users.noreply.github.com>

* Alertmanager: Changed the way on how we move and delete files

* Alertmanager: Make files executable

* Alertmanager: Set correct license and source header

* Update prometheus-alertmanager.json

---------

Co-authored-by: Michel Roegl-Brunner <73236783+michelroegl-brunner@users.noreply.github.com>
Co-authored-by: CanbiZ <47820557+MickLesk@users.noreply.github.com>

ct/prometheus-alertmanager.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+source <(curl -s https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+# Copyright (c) 2021-2025 community-scripts ORG
+# Author: Andy Grunwald (andygrunwald)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://prometheus.io/
+
+# App Default Values
+APP="Prometheus-Alertmanager"
+var_tags="monitoring;alerting"
+var_cpu="1"
+var_ram="1024"
+var_disk="2"
+var_os="debian"
+var_version="12"
+var_unprivileged="1"
+
+# App Output & Base Settings
+header_info "$APP"
+base_settings
+
+# Core
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+  if [[ ! -f /etc/systemd/system/prometheus-alertmanager.service ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+  RELEASE=$(curl -s https://api.github.com/repos/prometheus/alertmanager/releases/latest | grep "tag_name" | awk '{print substr($2, 3, length($2)-4) }')
+  if [[ ! -f /opt/${APP}_version.txt ]] || [[ "${RELEASE}" != "$(cat /opt/${APP}_version.txt)" ]]; then
+    msg_info "Stopping ${APP}"
+    systemctl stop prometheus-alertmanager
+    msg_ok "Stopped ${APP}"
+
+    msg_info "Updating ${APP} to v${RELEASE}"
+    cd /opt
+    wget -q https://github.com/prometheus/alertmanager/releases/download/v${RELEASE}/alertmanager-${RELEASE}.linux-amd64.tar.gz
+    tar -xf alertmanager-${RELEASE}.linux-amd64.tar.gz
+    cd alertmanager-${RELEASE}.linux-amd64
+    cp -rf alertmanager amtool /usr/local/bin/
+    rm -rf alertmanager-${RELEASE}.linux-amd64 alertmanager-${RELEASE}.linux-amd64.tar.gz
+    echo "${RELEASE}" >/opt/${APP}_version.txt
+    msg_ok "Updated ${APP} to ${RELEASE}"
+
+    msg_info "Starting ${APP}"
+    systemctl start prometheus-alertmanager
+    msg_ok "Started ${APP}"
+    msg_ok "Updated Successfully"
+  else
+    msg_ok "No update required. ${APP} is already at ${RELEASE}"
+  fi
+  exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed Successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW} Access it using the following URL:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}http://${IP}:9093${CL}"