Commit Graph

11 Commits

Author SHA1 Message Date
Lucas Servén Marín
24d7c27901
pkg/mesh,docs: document and fix keepalive logic
This commit documents the use of the persistent-keepalive annotation and
corrects the implementation of keepalives.

Signed-off-by: Lucas Servén Marín <lserven@gmail.com>
2020-03-04 01:36:56 +01:00
Lucas Servén Marín
aa376ff0d1
pkg/mesh,pkg/wireguard: allow DNS name endpoints
This commit allows DNS names to be used when specifying the endpoint
for a node in the WireGuard mesh. This is useful in many scenarios, in
particular when operating an IoT device whose public IP is dynamic. This
change allows the administrator to use a dynamic DNS name in the node's
endpoint.

One of the side-effects of this change is that the WireGuard port can
now be specified individually for each node in the mesh, if the
administrator wishes to do so.

*Note*: this commit introduces a breaking change; the
`force-external-ip` node annotation has been removed; its functionality
has been ported over to the `force-endpoint` annotation. This annotation
is documented in the annotations.md file. The expected content of this
annotation is no longer a CIDR but rather a host:port. The host can be
either a DNS name or an IP.

Signed-off-by: Lucas Servén Marín <lserven@gmail.com>
2020-02-22 17:17:13 +01:00
Lucas Servén Marín
134cbe90be
pkg/route,pkg/mesh: replace NAT with ip rules
This commit entirely replaces NAT in Kilo with a few iproute2 rules.
Previously, Kilo would source-NAT the majority of packets in order to
avoid problems with strict source checks in cloud providers causing
packets to be considered martians. This source-NAT-ing made it
difficult to correctly apply Kuberenetes NetworkPolicies based on source
IPs.

This rewrite instead relies on a handful of iproute2 rules to ensure
that packets get encapsulated in certain scenarios based on the source
network and/or source interface.

This has the benefit of avoiding extra iptables bloat as well as
enabling better compatibility with NetworkPolicies.

Signed-off-by: Lucas Servén Marín <lserven@gmail.com>
2020-02-20 21:27:50 +01:00
Francis Nguyen
6de0f9805a
Define WireGuard PersistentKeepAlive via Annotation (#31)
* Add WireGuardPersistentKeepAlive to mesh.Node

* Connect to configuration

* Shorten keepalive key

* Fix casing on keepalive

* Add annotated keepalive value to peer functions
2020-02-13 10:16:55 +01:00
Lucas Servén Marín
81d6077fc2
manifests,pkg/encapsulation: Flannel compatibility
This commit adds basic support to run in compatibility mode with
Flannel. This allows clusters running Flannel as their principal
networking solution to leverage some advances Kilo features. In certain
Flannel setups, the clusters can even leverage muti-cloud. For this, the
cluster needs to either run in a full mesh, or Flannel needs to use the
API server's external IP address.
2019-05-14 01:01:58 +02:00
Lucas Servén Marín
cd6eeeb1e7
pkg/{encapsulation,mesh}: abstract encapsulation
This commit abstracts away encapsulation to more easily allow for
different types of encapsulation or compatibility with other networking
solutions.
2019-05-13 18:30:03 +02:00
Lucas Servén Marín
35390054ba
pkg: deduplicate peer IP addresses
We need to defensively deduplicate peer allowed IPs.
If two peers claim the same IP, the WireGuard configuration
could flap, causing the interface to churn.
2019-05-10 02:07:42 +02:00
Lucas Servén Marín
4d9c203603
pkg/mesh,cmd: add WireGuard IP to Nodes
This allows admins or users to have some easy visibility into the
configuration of the Kilo cluster.
2019-05-10 02:06:02 +02:00
Lucas Servén Marín
9f30d8d1a1
pkg/mesh: rename mesh granularity types
This commit renames the mesh granularity types to make them more
intuitive. The functionality provided by them remains exactly the same.
2019-05-07 16:34:49 +02:00
Lucas Servén Marín
2425a06cd8
*: add peer VPN support
This commit adds support for defining arbitrary peers that should have
access to the VPN. In k8s, this is accomplished using the new Peer CRD.
2019-05-03 12:53:44 +02:00
Lucas Serven
e989f0a25f
init 2019-01-18 02:50:10 +01:00