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docs/flags: Make it explicit that HA is enabled by default and how to disable it.

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Signed-off-by: Bartek Plotka <bwplotka@gmail.com>
This commit is contained in:
Bartek Plotka 2019-07-23 15:52:26 +01:00
parent f450720213
commit f7f8c47d55
2 changed files with 3 additions and 4 deletions
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5
README.md
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@ -327,7 +327,7 @@ amtool config routes --alertmanager.url=http://localhost:9090
## High Availability
AlertManager's high availability is in production use at many companies.
AlertManager's high availability is in production use at many companies and is enabled by default.
> Important: Both UDP and TCP are needed in alertmanager 0.15 and higher for the cluster to work.
@ -335,7 +335,7 @@ To create a highly available cluster of the Alertmanager the instances need to
be configured to communicate with each other. This is configured using the
`--cluster.*` flags.
- `--cluster.listen-address` string: cluster listen address (default "0.0.0.0:9094")
- `--cluster.listen-address` string: cluster listen address (default "0.0.0.0:9094"; empty string disables HA mode)
- `--cluster.advertise-address` string: cluster advertise address
- `--cluster.peer` value: initial peers (repeat flag for each additional peer)
- `--cluster.peer-timeout` value: peer timeout period (default "15s")
@ -381,7 +381,6 @@ alerting:
If running Alertmanager in high availability mode is not desired, setting `--cluster.listen-address=` will prevent Alertmanager from listening to incoming peer requests.
## Contributing to the Front-End
Refer to [ui/app/CONTRIBUTING.md](ui/app/CONTRIBUTING.md).

2
cmd/alertmanager/main.go
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@ -172,7 +172,7 @@ func run() int {
getConcurrency = kingpin.Flag("web.get-concurrency", "Maximum number of GET requests processed concurrently. If negative or zero, the limit is GOMAXPROC or 8, whichever is larger.").Default("0").Int()
httpTimeout = kingpin.Flag("web.timeout", "Timeout for HTTP requests. If negative or zero, no timeout is set.").Default("0").Duration()
clusterBindAddr = kingpin.Flag("cluster.listen-address", "Listen address for cluster.").
clusterBindAddr = kingpin.Flag("cluster.listen-address", "Listen address for cluster. Set to empty string to disable HA mode.").
Default(defaultClusterAddr).String()
clusterAdvertiseAddr = kingpin.Flag("cluster.advertise-address", "Explicit address to advertise in cluster.").String()
peers = kingpin.Flag("cluster.peer", "Initial peers (may be repeated).").Strings()