This commit updates the well-known label to determine the region of the
node to topology.kubernetes.io/region, which is the new standard as
defined by the Kubernetes documentation, now that
failure-domain.beta.kubernetes.io/region has been deprecated.
This commit takes a big step towards ensuring that iptables rules are
always kept in the correct order. Specifically, when re-setting a a
ruleset, any time a rule is missing, that rule and all following rules
are re-added to ensure that from that index onwards all rules are in the
right order. Similarly, when reconciling an existing ruleset against the
backend, if a rule is missing, that rule an all following rules are
re-added.
This change does not guarantee that the order of rules in the backend
is correct. Unless an actor is modifying the order of rules in iptables,
all rules created by Kilo should now be kept in the correct order.
Fixes: #19
This commit makes it possible to specify the Kilo interface name. If the
specified interface exists, it will be used; if it does not exist, Kilo
will create it. If the interface already existed, then it will not be
deleted on shutdown; otherwise Kilo will destroy the interface.
Fixes: https://github.com/squat/kilo/issues/8
Addresses: 1/2 of https://github.com/squat/kilo/issues/17
If the hostname fails to resolve, this should not be considered a
blocking error. Most likely, it means that the hostname is simply not
resolvable, which should not be a requirement to run Kilo. In this case,
simply try to find a valid IP from other sources.
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.
Add an exception to the route generation rules for when the external IP
of a node equals the internal IP. In this case, we cannot route traffic
through a tunnel.
This commit ensures that the WireGuard private key is re-used between
container restarts. The result of this is that external peers can keep
using their configuration and don't need to be re-configured just
because the Kilo container restarted.
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.
This commit adds several output options to the `showconf` command of the
`kgctl` binary:
* `--as-peer`: this can be used to generate a peer configuration, which
can be used to configure the selected resource as a peer of another
WireGuard interface
* `--output`: this can be used to select the desired output format of
the peer resource, available options are: WireGuard, YAML, and JSON.
When interfaces on the host churn, the kernel will remove routes
associated with those interfaces. This could cause the Kilo route
controller to become out of sync with the routes that really exist. This
commit fixes this behavior.
This commit enables Kilo to work as an independent networking provider.
This is done by leveraging CNI. Kilo brings the necessary CNI plugins to
operate and takes care of all networking.
Add-on compatibility for Calico, Flannel, etc, will be re-introduced
shortly.
This commit exposes a new Prometheus to track the number of
reconciliation attempts. This is important, as without this, the number
of errors it not too helpful. A more valuable statistic is the
proportion of reconciliations that result in an error.
This commit introduces liveness checks to Kilo. This allows the Kilo
daemons to take nodes with inactive or dead Kilo deamons out of the
topology until they are alive again.
Francis Nguyen
Lucas Servén Marín