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feat(rtt): 'machine rtt' command to show round-trip time between macines usign using gossip data (#226)

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* Add corrosion admin client function to get RTT to other machines in the cluster

* Add `uc machine rtt` showing all pair-wise RTT stats from corrosion

* Add long description to machine rtt command

* Include machine peer RTTs in InspectMachine instead of adding new gRPC API for it

* Add nil check on InspectMachine's Rtt field to protect from a potential edge case

* Generate docs for machine rtt command

* Handle m.Message being nil when a node is down or unavailble

* Update cli-docs

* Use tui Table instead of tabwriter

* Change reported RTT to the median rather than mean. Still calculate include stddev, as it might be a useful indication of network jitter.

* Show RTT to peers in `wg show` output

* Update cli docs
This commit is contained in:
Justin Bradford
2026-04-20 08:01:20 +10:00
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parent 1c0d48cb46
commit 8d023f5c53
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website/docs/9-cli-reference/uc_machine.md
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@@ -25,5 +25,6 @@ Manage machines in the cluster.
* [uc machine ls](uc_machine_ls.md) - List machines in a cluster.
* [uc machine rename](uc_machine_rename.md) - Rename a machine in the cluster.
* [uc machine rm](uc_machine_rm.md) - Remove a machine from a cluster and reset it.
* [uc machine rtt](uc_machine_rtt.md) - Show round-trip times between machines.
* [uc machine update](uc_machine_update.md) - Update machine configuration in the cluster.
website/docs/9-cli-reference/uc_machine_rtt.md
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# uc machine rtt
Show round-trip times between machines.
## Synopsis
Show round-trip times between machines.
Round-trip time statistics are collected from the Corrosion gossip protocol
and represent the median of recent RTT samples between each pair of machines
in the cluster. The values shown include the median RTT and standard deviation
for each machine-to-machine connection.
```
uc machine rtt [flags]
```
## Options
```
-h, --help help for rtt
```
## Options inherited from parent commands
```
--connect string Connect to a remote cluster machine without using the Uncloud configuration file. [$UNCLOUD_CONNECT]
Format: [ssh://]user@host[:port], ssh+go://user@host[:port], tcp://host:port, or unix:///path/to/uncloud.sock
-c, --context string Name of the cluster context to use (default is the current context). [$UNCLOUD_CONTEXT]
--uncloud-config string Path to the Uncloud configuration file. [$UNCLOUD_CONFIG] (default "~/.config/uncloud/config.yaml")
```
## See also
* [uc machine](uc_machine.md) - Manage machines in the cluster.