As indicated by bradfitz in https://github.com/juanfont/headscale/issues/804#issuecomment-1399314002,
both routes for the exit node must be enabled at the same time. If a user tries to enable one of the exit node routes,
the other gets activated too.
This commit also reduces the API surface, making private a method that didnt need to be exposed.
When using Tailscale v1.34.1, enabling or disabling a route does not
effectively add or remove the route from the node's routing table.
We must restart tailscale on the node to have a netmap update.
Fix this by refreshing last state change so that a netmap diff is sent.
Also do not include secondary routes in allowedIPs, otherwise secondary
routes might be used by nodes instead of the primary route.
Signed-off-by: Fatih Acar <facar@scaleway.com>
Port routes tests to new model
Mark as primary the first instance of subnet + tests
In preparation for subnet failover, mark the initial occurrence of a subnet as the primary one.
This commit moves the routes lookup functions to be subcommands of
Machine, making them a lot simpler and more specific/composable.
It also moves the register command from cli.go into machine, so we can
clear out the extra file.
Finally a toProto function has been added to convert between the machine
database model and the proto/rpc model.
This commit rewrites the `routes list` command to use ptables to present
a slightly nicer list, including a new field if the route is enabled or
not (which is quite useful).
In addition, it reworks the enable command to support enabling multiple
routes (not only one route as per removed TODO). This allows users to
actually take advantage of exit-nodes and subnet relays.
This commit removes most of the locks in the PollingMap handler as there
was combinations that caused deadlocks. Instead of doing a plain map and
doing the locking ourselves, we use sync.Map which handles it for us.
