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19b0c8a024
updates tailscale/corp#21823 Misconfigured, broken, or blocked DNS will often present as "internet is broken'" to the end user. This plumbs the health tracker into the dns manager and forwarder and adds a health warning with a 5 second delay that is raised on failures in the forwarder and lowered on successes. Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
40 lines
1.7 KiB
Go
40 lines
1.7 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package health
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// Arg is a type for the key to be used in the Args of a Warnable.
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type Arg string
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const (
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// ArgAvailableVersion provides an update notification Warnable with the available version of the Tailscale client.
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ArgAvailableVersion Arg = "available-version"
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// ArgCurrentVersion provides an update notification Warnable with the current version of the Tailscale client.
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ArgCurrentVersion Arg = "current-version"
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// ArgDuration provides a Warnable with how long the Warnable has been in an unhealthy state.
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ArgDuration Arg = "duration"
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// ArgError provides a Warnable with the underlying error behind an unhealthy state.
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ArgError Arg = "error"
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// ArgMagicsockFunctionName provides a Warnable with the name of the Magicsock function that caused the unhealthy state.
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ArgMagicsockFunctionName Arg = "magicsock-function-name"
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// ArgDERPRegionID provides a Warnable with the ID of a DERP server involved in the unhealthy state.
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ArgDERPRegionID Arg = "derp-region-id"
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// ArgDERPRegionName provides a Warnable with the name of a DERP server involved in the unhealthy state.
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// It is used to show a more friendly message like "the Seattle relay server failed to connect" versus
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// "relay server 10 failed to connect".
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ArgDERPRegionName Arg = "derp-region-name"
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// ArgServerName provides a Warnable with the hostname of a server involved in the unhealthy state.
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ArgServerName Arg = "server-name"
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// ArgServerName provides a Warnable with comma delimited list of the hostname of the servers involved in the unhealthy state.
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// If no nameservers were available to query, this will be an empty string.
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ArgDNSServers Arg = "dns-servers"
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)
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