NAME

       prometheus-alertmanager - the Prometheus alert manager

SYNOPSIS

       prometheus-alertmanager [<flags>]

DESCRIPTION

OPTIONS

       -h, --help
              Show context-sensitive help (also try --help-long and --help-man).

       --config.file
              Alertmanager configuration file name.

       --storage.path
              Base path for data storage.

       --data.retention=120h
              How long to keep data for.

       --data.maintenance-interval=15m
              Interval  between garbage collection and snapshotting to disk of the silences and the notification
              logs.

       --alerts.gc-interval=30m
              Interval between alert GC.

       --web.systemd-socket
              Use systemd socket activation listeners instead of port listeners (Linux only).

       --web.listen-address=:9093
              Addresses on which to expose metrics and web interface. Repeatable for multiple addresses.

       --web.config.file
              Path   to   configuration    file    that    can    enable    TLS    or    authentication.    See:
              https://github.com/prometheus/exporter-toolkit/blob/master/docs/web-configuration.md

       --web.external-url=WEB.EXTERNAL-URL
              The  URL  under which Alertmanager is externally reachable (for example, if Alertmanager is served
              via a reverse proxy). Used for generating relative and absolute links back to Alertmanager itself.
              If the URL has a  path  portion,  it  will  be  used  to  prefix  all  HTTP  endpoints  served  by
              Alertmanager. If omitted, relevant URL components will be derived automatically.

       --web.route-prefix=WEB.ROUTE-PREFIX
              Prefix for the internal routes of web endpoints. Defaults to path of --web.external-url.

       --web.get-concurrency=0
              Maximum number of GET requests processed concurrently. If negative or zero, the limit is GOMAXPROC
              or 8, whichever is larger.

       --web.timeout=0
              Timeout for HTTP requests. If negative or zero, no timeout is set.

       --web.ui-path
              Path to static UI directory.

       --cluster.listen-address
              Listen address for cluster. Set to empty string to disable HA mode.

       --cluster.advertise-address=CLUSTER.ADVERTISE-ADDRESS
              Explicit address to advertise in cluster.

       --cluster.peer=CLUSTER.PEER
              Initial peers (may be repeated).

       --cluster.peer-timeout=15s
              Time to wait between peers to send notifications.

       --cluster.gossip-interval=200ms
              Interval  between  sending gossip messages. By lowering this value (more frequent) gossip messages
              are propagated across the cluster more quickly at the expense of increased bandwidth.

       --cluster.pushpull-interval=1m0s
              Interval for gossip state syncs.  Setting  this  interval  lower  (more  frequent)  will  increase
              convergence speeds across larger clusters at the expense of increased bandwidth usage.

       --cluster.tcp-timeout=10s
              Timeout  for  establishing  a  stream connection with a remote node for a full state sync, and for
              stream read and write operations.

       --cluster.probe-timeout=500ms
              Timeout to wait for an ack from a probed node before assuming it is unhealthy. This should be  set
              to 99-percentile of RTT (round-trip time) on your network.

       --cluster.probe-interval=1s
              Interval  between random node probes. Setting this lower (more frequent) will cause the cluster to
              detect failed nodes more quickly at the expense of increased bandwidth usage.

       --cluster.settle-timeout=1m0s
              Maximum time to wait for cluster connections to settle before evaluating notifications.

       --cluster.reconnect-interval=10s
              Interval between attempting to reconnect to lost peers.

       --cluster.reconnect-timeout=6h0m0s
              Length of time to attempt to reconnect to a lost peer.

       --cluster.tls-config
              [EXPERIMENTAL] Path to config yaml file that can enable mutual TLS within the gossip protocol.

       --cluster.allow-insecure-public-advertise-address-discovery
              [EXPERIMENTAL] Allow alertmanager to discover and listen on a public IP address.

       --cluster.label
              The cluster label is an optional string  to  include  on  each  packet  and  stream.  It  uniquely
              identifies the cluster and prevents cross-communication issues when sending gossip messages.

       --log.level=info
              Only log messages with the given severity or above. One of: [debug, info, warn, error]

       --log.format=logfmt
              Output format of log messages. One of: [logfmt, json]

       --version
              Show application version.

prometheus-alertmanager 0.26.0+ds                   July 2025                         PROMETHEUS-ALERTMANAGER(1)