On 1/29/25 12:16 PM, Felix Huettner via dev wrote:
> Previously vrf names where generated using "ovnvrf" + datapath id.
> Now the controller supports the dynamic-routing-vrf-name setting to
> overwrite this to whatever value the user desires.
> Note that the vrf ID is still the datapath id.
>
> Signed-off-by: Felix Huettner <felix.huettner@stackit.cloud>
> ---
Hi Felix,
> controller/route-exchange.c | 14 ++++++--------
> controller/route.c | 15 +++++++++++++++
> controller/route.h | 2 ++
> tests/system-ovn.at | 15 ++++++++++++++-
> 4 files changed, 37 insertions(+), 9 deletions(-)
>
> diff --git a/controller/route-exchange.c b/controller/route-exchange.c
> index 47ff2350e..79e65280b 100644
> --- a/controller/route-exchange.c
> +++ b/controller/route-exchange.c
> @@ -221,27 +221,25 @@ route_exchange_run(struct route_exchange_ctx_in
> *r_ctx_in,
> const struct advertise_datapath_entry *ad;
> HMAP_FOR_EACH (ad, node, r_ctx_in->announce_routes) {
> uint32_t table_id = ad->db->tunnel_key;
> - char vrf_name[IFNAMSIZ + 1];
> - snprintf(vrf_name, sizeof vrf_name, "ovnvrf%"PRIi32, table_id);
>
> if (ad->maintain_vrf) {
> - if (!sset_contains(&old_maintained_vrfs, vrf_name)) {
> - int error = re_nl_create_vrf(vrf_name, table_id);
> + if (!sset_contains(&old_maintained_vrfs, ad->vrf_name)) {
> + int error = re_nl_create_vrf(ad->vrf_name, table_id);
> if (error && error != EEXIST) {
> VLOG_WARN_RL(&rl,
> "Unable to create VRF %s for datapath "
> "%"PRIi32": %s.",
> - vrf_name, table_id,
> + ad->vrf_name, table_id,
> ovs_strerror(error));
> continue;
> }
> }
> - sset_add(&_maintained_vrfs, vrf_name);
> + sset_add(&_maintained_vrfs, ad->vrf_name);
> } else {
> /* a previous maintain-vrf flag was removed. We should therfor
> * also not delete it even if we created it previously. */
> - sset_find_and_delete(&_maintained_vrfs, vrf_name);
> - sset_find_and_delete(&old_maintained_vrfs, vrf_name);
> + sset_find_and_delete(&_maintained_vrfs, ad->vrf_name);
> + sset_find_and_delete(&old_maintained_vrfs, ad->vrf_name);
> }
>
> maintained_route_table_add(table_id);
> diff --git a/controller/route.c b/controller/route.c
> index 2d86edc97..d513b449e 100644
> --- a/controller/route.c
> +++ b/controller/route.c
> @@ -143,6 +143,21 @@ route_run(struct route_ctx_in *r_ctx_in,
> char *ifname = nullable_xstrdup(
> smap_get(&repb->options,
> "dynamic-routing-ifname"));
> +
> + const char *vrf_name = smap_get(&repb->options,
> + "dynamic-routing-vrf-name");
Indentation is a bit off.
> + if (vrf_name && strlen(vrf_name) >= sizeof ad->vrf_name) {
> + VLOG_WARN("Ignoring vrf name %s, since it is too long",
> + vrf_name);
Maybe we should log the maximum here? Also, please rate limit this log.
> + vrf_name = NULL;
> + }
> + if (vrf_name) {
> + memcpy(ad->vrf_name, vrf_name, strlen(vrf_name) + 1);
> + } else {
> + snprintf(ad->vrf_name, sizeof ad->vrf_name, "ovnvrf%"PRIi64,
> + ad->db->tunnel_key);
> + }
> +
> smap_add_nocopy(&ad->bound_ports,
> xstrdup(local_peer->logical_port), ifname);
> }
> diff --git a/controller/route.h b/controller/route.h
> index 986c35ec0..1afaf0ef6 100644
> --- a/controller/route.h
> +++ b/controller/route.h
> @@ -20,6 +20,7 @@
>
> #include <stdbool.h>
> #include <netinet/in.h>
> +#include <net/if.h>
> #include "openvswitch/hmap.h"
> #include "sset.h"
> #include "smap.h"
> @@ -55,6 +56,7 @@ struct advertise_datapath_entry {
> struct hmap_node node;
> const struct sbrec_datapath_binding *db;
> bool maintain_vrf;
> + char vrf_name[IFNAMSIZ + 1];
> struct hmap routes;
>
> /* The name of the port bindings locally bound for this datapath and
> diff --git a/tests/system-ovn.at b/tests/system-ovn.at
> index 963a67e0c..12985edd2 100644
> --- a/tests/system-ovn.at
> +++ b/tests/system-ovn.at
> @@ -14867,6 +14867,7 @@ OVN_FOR_EACH_NORTHD([
> AT_SETUP([dynamic-routing - DGP])
>
> VRF_RESERVE([1337])
> +VRF_RESERVE([1338])
>
> # This test uses dynamic routing on a simulated multi-tenant internet
> # connection.
> @@ -15113,10 +15114,22 @@ blackhole 192.0.2.10 proto 84 metric 100
> blackhole 198.51.100.0/24 proto 84 metric 1000
> 233.252.0.0/24 via 192.168.10.10 dev lo onlink])
>
> +# Changing the vrf name will switch to the new one.
> +check ovn-nbctl --wait=hv set Logical_Router internet
> options:dynamic-routing-vrf-name=ovnvrf1338
I had mentioned the misconfig of the dynamic-routing-vrf-name in my
reply to this patch last week, mentioning it again so the review is
consolidated. :)
> +check ovn-nbctl --wait=hv set Logical_Router_Port internet-phys \
> + options:dynamic-routing-maintain-vrf=true
> +OVS_WAIT_UNTIL_EQUAL([ip route list vrf ovnvrf1338 | awk '{$1=$1};1'], [dnl
> +blackhole 192.0.2.1 proto 84 metric 1000
> +blackhole 192.0.2.2 proto 84 metric 100
> +blackhole 192.0.2.3 proto 84 metric 100
> +blackhole 192.0.2.10 proto 84 metric 100
> +blackhole 198.51.100.0/24 proto 84 metric 1000
> +233.252.0.0/24 via 192.168.10.10 dev lo onlink])
> +
> # Stoping with --restart will not touch the routes.
> check ovn-appctl -t ovn-controller exit --restart
> OVS_WAIT_UNTIL([test "$(ovn-appctl -t ovn-controller debug/status)" !=
> "running"])
> -OVS_WAIT_UNTIL_EQUAL([ip route list vrf ovnvrf1337 | awk '{$1=$1};1'], [dnl
> +OVS_WAIT_UNTIL_EQUAL([ip route list vrf ovnvrf1338 | awk '{$1=$1};1'], [dnl
> blackhole 192.0.2.1 proto 84 metric 1000
> blackhole 192.0.2.2 proto 84 metric 100
> blackhole 192.0.2.3 proto 84 metric 100
Regards,
Dumitru
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