This PR removes the complicated session management introduced in https://github.com/juanfont/headscale/pull/1791 which kept track of the sessions in a map, in addition to the channel already kept track of in the notifier.
Instead of trying to close the mapsession, it will now be replaced by the new one and closed after so all new updates goes to the right place.
The map session serve function is also split into a streaming and a non-streaming version for better readability.
RemoveNode in the notifier will not remove a node if the channel is not matching the one that has been passed (e.g. it has been replaced with a new one).
A new tuning parameter has been added to added to set timeout before the notifier gives up to send an update to a node.
Add a keep alive resetter so we wait with sending keep alives if a node has just received an update.
In addition it adds a bunch of env debug flags that can be set:
- `HEADSCALE_DEBUG_HIGH_CARDINALITY_METRICS`: make certain metrics include per node.id, not recommended to use in prod.
- `HEADSCALE_DEBUG_PROFILING_ENABLED`: activate tracing
- `HEADSCALE_DEBUG_PROFILING_PATH`: where to store traces
- `HEADSCALE_DEBUG_DUMP_CONFIG`: calls `spew.Dump` on the config object startup
- `HEADSCALE_DEBUG_DEADLOCK`: enable go-deadlock to dump goroutines if it looks like a deadlock has occured, enabled in integration tests.
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* update tailscale go dep
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* update gorm go dep
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* update grpc go dep
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* update golang.org go dep
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* update rest of go dep
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
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Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit restructures the map session in to a struct
holding the state of what is needed during its lifetime.
For streaming sessions, the event loop is structured a
bit differently not hammering the clients with updates
but rather batching them over a short, configurable time
which should significantly improve cpu usage, and potentially
flakyness.
The use of Patch updates has been dialed back a little as
it does not look like its a 100% ready for prime time. Nodes
are now updated with full changes, except for a few things
like online status.
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commits removes the locks used to guard data integrity for the
database and replaces them with Transactions, turns out that SQL had
a way to deal with this all along.
This reduces the complexity we had with multiple locks that might stack
or recurse (database, nofitifer, mapper). All notifications and state
updates are now triggered _after_ a database change.
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* upgrade tailscale
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* make Node object use actualy tailscale key types
This commit changes the Node struct to have both a field for strings
to store the keys in the database and a dedicated Key for each type
of key.
The keys are populated and stored with Gorm hooks to ensure the data
is stored in the db.
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* use key types throughout the code
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* make sure machinekey is concistently used
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* use machine key in auth url
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* fix web register
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* use key type in notifier
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
* fix relogin with webauth
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
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Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commits extends the mapper with functions for creating "delta"
MapResponses for different purposes (peer changed, peer removed, derp).
This wires up the new state management with a new StateUpdate struct
letting the poll worker know what kind of update to send to the
connected nodes.
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit replaces the timestamp based state system with a new
one that has update channels directly to the connected nodes. It
will send an update to all listening clients via the polling
mechanism.
It introduces a new package notifier, which has a concurrency safe
manager for all our channels to the connected nodes.
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
