Since commit 933fcc9 (Re-remove the SetKey OCI prestart hook),
the network namespace will be set up before endpoints are
created in most cases, apart from build containers.
So, when possible, create the veth with one end in that netns
to save moving it in later. On my host, that saves about 20ms
for each bridge network a container is connected to.
Signed-off-by: Rob Murray <rob.murray@docker.com>
The default is to send 3 messages at 1s intervals.
That can be overridden in "docker network create" using:
-o com.docker.network.advertise_addr_nmsgs=3
-o com.docker.network.advertise_addr_ms=1000
Or, in daemon.json for each driver:
"default-network-opts": {
"bridge": {
"com.docker.network.advertise_addr_nmsgs": "3",
"com.docker.network.advertise_addr_ms": "1000"
}
}
The allowed range is 0-3 for the number of messages, and
100-2000ms for the interval. Setting nmsgs to 0 disables the
gratuitous ARP/NA messages.
The default bridge will always use the built-in defaults,
it cannot be configured.
Signed-off-by: Rob Murray <rob.murray@docker.com>
Until now it's been possible to set per-interface sysctls using, for
example, '--sysctl net.ipv6.conf.eth0.accept_ra=2'. But, the index in
the interface name is allocated serially, and the numbering in a container
with more than one interface may change when a container is restarted.
The change to make it possible to connect a container to more than one
network when it's created increased the ambiguity.
This change adds label "com.docker.network.endpoint.sysctls" to the
DriverOpts in EndpointSettings. This option is explicitly associated
with the interface.
Settings in "--sysctl" for "eth0" are migrated to DriverOpts.
Because using "--sysctl" with any interface apart from "eth0" would have
unpredictable results, it is now an error to use any other interface name
in the top level "--sysctl" option. The error message includes a hint at
how to use the new per-interface setting.
The per-endpoint sysctl name has the interface name replaced by
"IFNAME". For example:
net.ipv6.conf.eth0.accept_ra=2
becomes:
net.ipv6.conf.IFNAME.accept_ra=2
The value of DriverOpts["com.docker.network.endpoint.sysctls"] is a
comma separated list.
Settings from '--sysctl' are applied by the runtime lib during task
creation. So, task creation fails if the endpoint does not exist.
Applying per-endpoint settings during interface configuration means the
endpoint can be created later, which paves the way for removal of the
SetKey OCI prestart hook.
Unlike other DriverOpts, the sysctl label itself is not driver-specific,
but each driver has a chance to check settings/values and raise an error
if a setting would cause it a problem - no such checks have been added
in this initial version. As a future extension, if required, it would be
possible for the driver to echo back valid/extended/modified settings to
libnetwork for it to apply to the interface. (At that point, the syntax
for the options could become driver specific to allow, for example, a
driver to create more than one interface).
Signed-off-by: Rob Murray <rob.murray@docker.com>
It's still not "great", but implement a `newInterface()` constructor
to create a new Interface instance, instead of creating a partial
instance and applying "options" after the fact.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
There's only one implementation; let's use that.
Also fixing a linting issue;
libnetwork/osl/interface_linux.go:91:2: S1001: should use copy(to, from) instead of a loop (gosimple)
for i, iface := range n.iFaces {
^
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
InterfaceOptions() returned an IfaceOptionSetter interface, which contained
"methods" that returned functional options. Such a construct could have made
sense if the functional options returned would (e.g.) be pre-propagated with
information from the Sandbox (network namespace), but none of that was the case.
There was only one implementation of IfaceOptionSetter (networkNamespace),
which happened to be the same as the only implementation of Sandbox, so remove
the interface as well, to help networkNamespace with its multi-personality
disorder.
This patch:
- removes Sandbox.Bridge() and makes it a regular function (WithIsBridge)
- removes Sandbox.Master() and makes it a regular function (WithMaster)
- removes Sandbox.MacAddress() and makes it a regular function (WithMACAddress)
- removes Sandbox.Address() and makes it a regular function (WithIPv4Address)
- removes Sandbox.AddressIPv6() and makes it a regular function (WithIPv6Address)
- removes Sandbox.LinkLocalAddresses() and makes it a regular function (WithLinkLocalAddresses)
- removes Sandbox.Routes() and makes it a regular function (WithRoutes)
- removes Sandbox.InterfaceOptions().
- removes the IfaceOptionSetter interface.
Note that the IfaceOption signature was changes as well to allow returning
an error. This is not currently used, but will be used for some options
in the near future, so adding that in preparation.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
NeighborOptions() returned an NeighborOptionSetter interface, which
contained "methods" that returned functional options. Such a construct
could have made sense if the functional options returned would (e.g.)
be pre-propagated with information from the Sandbox (network namespace),
but none of that was the case.
There was only one implementation of NeighborOptionSetter (networkNamespace),
which happened to be the same as the only implementation of Sandbox, so
remove the interface as well, to help networkNamespace with its multi-personality
disorder.
This patch:
- removes Sandbox.LinkName() and makes it a regular function (WithLinkName)
- removes Sandbox.Family() and makes it a regular function (WithFamily)
- removes Sandbox.NeighborOptions().
- removes the NeighborOptionSetter interface
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Copying the descriptions from the Sandbox, Info, NeighborOptionSetter,
and IfaceOptionSetter interfaces that it implements.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
- Consistently with what it does for IP addresses, libnetwork
will also program the container interface's MAC address with
the value set by network driver in InterfaceInfo.
Signed-off-by: Alessandro Boch <aboch@docker.com>
- Maps 1 to 1 with container's networking stack
- It holds container's specific nw options which
before were incorrectly owned by Endpoint.
- Sandbox creation no longer coupled with Endpoint Join,
sandbox and endpoint have now separate lifecycle.
- LeaveAll naturally replaced by Sandbox.Delete
- some pkg and file renaming in order to have clear
mapping between structure name and entity ("sandbox")
- Revisited hosts and resolv.conf handling
- Removed from JoinInfo interface capability of setting hosts and resolv.conf paths
- Changed etchosts.Build() to first write the search domains and then the nameservers
Signed-off-by: Alessandro Boch <aboch@docker.com>
