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}"

install/prometheus-alertmanager-install.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+
+# 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/
+
+source /dev/stdin <<< "$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+msg_info "Installing Dependencies"
+$STD apt-get install -y \
+  curl \
+  sudo \
+  mc
+msg_ok "Installed Dependencies"
+
+msg_info "Installing Prometheus Alertmanager"
+RELEASE=$(curl -s https://api.github.com/repos/prometheus/alertmanager/releases/latest | grep "tag_name" | awk '{print substr($2, 3, length($2)-4) }')
+mkdir -p /etc/alertmanager
+mkdir -p /var/lib/alertmanager
+wget -q https://github.com/prometheus/alertmanager/releases/download/v${RELEASE}/alertmanager-${RELEASE}.linux-amd64.tar.gz
+tar -xf alertmanager-${RELEASE}.linux-amd64.tar.gz
+mv alertmanager-${RELEASE}.linux-amd64/alertmanager alertmanager-${RELEASE}.linux-amd64/amtool /usr/local/bin/
+mv alertmanager-${RELEASE}.linux-amd64/alertmanager.yml /etc/alertmanager/alertmanager.yml
+echo "${RELEASE}" >/opt/${APPLICATION}_version.txt
+msg_ok "Installed Prometheus Alertmanager"
+
+msg_info "Creating Service"
+cat <<EOF >/etc/systemd/system/prometheus-alertmanager.service
+echo "[Unit]
+Description=Prometheus Alertmanager
+Wants=network-online.target
+After=network-online.target
+
+[Service]
+User=root
+Restart=always
+Type=simple
+ExecStart=/usr/local/bin/alertmanager \
+    --config.file=/etc/alertmanager/alertmanager.yml \
+    --storage.path=/var/lib/alertmanager/ \
+    --web.listen-address=0.0.0.0:9093
+ExecReload=/bin/kill -HUP \$MAINPID
+
+[Install]
+WantedBy=multi-user.target"
+EOF
+systemctl enable -q --now prometheus-alertmanager
+msg_ok "Created Service"
+
+motd_ssh
+customize
+
+msg_info "Cleaning up"
+$STD apt-get -y autoremove
+$STD apt-get -y autoclean
+rm -rf alertmanager-${RELEASE}.linux-amd64 alertmanager-${RELEASE}.linux-amd64.tar.gz
+msg_ok "Cleaned"

json/prometheus-alertmanager.json

@@ -0,0 +1,34 @@
+{
+    "name": "Prometheus Alertmanager",
+    "slug": "prometheus-alertmanager",
+    "categories": [
+        7
+    ],
+    "date_created": "2025-01-09"
+    "type": "ct",
+    "updateable": true,
+    "privileged": false,
+    "interface_port": 9093,
+    "documentation": "https://prometheus.io/docs/alerting/latest/overview/",
+    "website": "https://prometheus.io/",
+    "logo": "https://raw.githubusercontent.com/loganmarchione/homelab-svg-assets/main/assets/prometheus.svg",
+    "description": "Alerting with Prometheus is separated into two parts. Alerting rules in Prometheus servers send alerts to an Alertmanager. The Alertmanager then manages those alerts, including silencing, inhibition, aggregation and sending out notifications via methods such as email, on-call notification systems, and chat platforms.",
+    "install_methods": [
+        {
+            "type": "default",
+            "script": "ct/prometheus-alertmanager.sh",
+            "resources": {
+                "cpu": 1,
+                "ram": 1024,
+                "hdd": 2,
+                "os": "debian",
+                "version": "12"
+            }
+        }
+    ],
+    "default_credentials": {
+        "username": null,
+        "password": null
+    },
+    "notes": []
+}