[ovs-dev] [PATCH ovn v9 3/4] northd: Add options to automatically add routes for NATs and LBs.
Numan Siddique
numans at ovn.org
Wed Jul 7 17:35:38 UTC 2021
On Wed, Jun 30, 2021 at 7:57 PM Mark Michelson <mmichels at redhat.com> wrote:
>
> Load_Balancer and NAT entries have a new option, "add_route" that can be
> set to automatically add routes to those addresses to neighbor routers,
> therefore eliminating the need to create static routes.
>
> Signed-off-by: Mark Michelson <mmichels at redhat.com>
Acked-by: Numan Siddique <numans at ovn.org>
There is one small comment which you can choose to ignore. Please see below.
Numan
> ---
> northd/ovn-northd.8.xml | 7 ++++-
> northd/ovn-northd.c | 57 +++++++++++++++++++++++++++++++++--------
> northd/ovn_northd.dl | 23 ++++++++++++-----
> ovn-nb.xml | 33 +++++++++++++++++++++++-
> tests/ovn-nbctl.at | 3 +++
> tests/ovn-northd.at | 40 ++++++++++++++++++++++++++---
> utilities/ovn-nbctl.c | 25 +++++++++++++-----
> 7 files changed, 158 insertions(+), 30 deletions(-)
>
> diff --git a/northd/ovn-northd.8.xml b/northd/ovn-northd.8.xml
> index b5c961e89..beaf5a183 100644
> --- a/northd/ovn-northd.8.xml
> +++ b/northd/ovn-northd.8.xml
> @@ -3539,7 +3539,12 @@ outport = <var>P</var>
> <ref column="external_mac" table="NAT" db="OVN_Northbound"/> column
> of <ref table="NAT" db="OVN_Northbound"/> table for of type
> <code>dnat_and_snat</code>, otherwise the Ethernet address of the
> - distributed logical router port.
> + distributed logical router port. Note that if the
> + <ref column="external_ip" table="NAT" db="OVN_Northbound"/> is not
> + within a subnet on the owning logical router, then OVN will only
> + create ARP resolution flows if the <ref column="options:add_route"/>
> + is set to <code>true</code>. Otherwise, no ARP resolution flows
> + will be added.
> </p>
>
> <p>
> diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
> index 58132bc5c..f6fad281b 100644
> --- a/northd/ovn-northd.c
> +++ b/northd/ovn-northd.c
> @@ -662,8 +662,14 @@ struct ovn_datapath {
> struct lport_addresses dnat_force_snat_addrs;
> struct lport_addresses lb_force_snat_addrs;
> bool lb_force_snat_router_ip;
> + /* The "routable" ssets are subsets of the load balancer
> + * IPs for which IP routes and ARP resolution flows are automatically
> + * added
> + */
> struct sset lb_ips_v4;
> + struct sset lb_ips_v4_routable;
> struct sset lb_ips_v6;
> + struct sset lb_ips_v6_routable;
>
> struct ovn_port **localnet_ports;
> size_t n_localnet_ports;
> @@ -834,7 +840,9 @@ static void
> init_lb_ips(struct ovn_datapath *od)
> {
> sset_init(&od->lb_ips_v4);
> + sset_init(&od->lb_ips_v4_routable);
> sset_init(&od->lb_ips_v6);
> + sset_init(&od->lb_ips_v6_routable);
> }
>
> static void
> @@ -845,7 +853,9 @@ destroy_lb_ips(struct ovn_datapath *od)
> }
>
> sset_destroy(&od->lb_ips_v4);
> + sset_destroy(&od->lb_ips_v4_routable);
> sset_destroy(&od->lb_ips_v6);
> + sset_destroy(&od->lb_ips_v6_routable);
> }
>
> /* A group of logical router datapaths which are connected - either
> @@ -1475,13 +1485,14 @@ destroy_routable_addresses(struct ovn_port_routable_addresses *ra)
> free(ra->laddrs);
> }
>
> -static char **get_nat_addresses(const struct ovn_port *op, size_t *n);
> +static char **get_nat_addresses(const struct ovn_port *op, size_t *n,
> + bool routable_only);
>
> static void
> assign_routable_addresses(struct ovn_port *op)
> {
> size_t n;
> - char **nats = get_nat_addresses(op, &n);
> + char **nats = get_nat_addresses(op, &n, true);
>
> if (!nats) {
> return;
> @@ -2541,7 +2552,7 @@ join_logical_ports(struct northd_context *ctx,
> * The caller must free each of the n returned strings with free(),
> * and must free the returned array when it is no longer needed. */
> static char **
> -get_nat_addresses(const struct ovn_port *op, size_t *n)
> +get_nat_addresses(const struct ovn_port *op, size_t *n, bool routable_only)
> {
> size_t n_nats = 0;
> struct eth_addr mac;
> @@ -2564,6 +2575,12 @@ get_nat_addresses(const struct ovn_port *op, size_t *n)
> const struct nbrec_nat *nat = op->od->nbr->nat[i];
> ovs_be32 ip, mask;
>
> + if (routable_only &&
> + (!strcmp(nat->type, "snat") ||
> + !smap_get_bool(&nat->options, "add_route", false))) {
> + continue;
> + }
> +
> char *error = ip_parse_masked(nat->external_ip, &ip, &mask);
> if (error || mask != OVS_BE32_MAX) {
> free(error);
> @@ -2615,13 +2632,24 @@ get_nat_addresses(const struct ovn_port *op, size_t *n)
> }
>
> const char *ip_address;
> - SSET_FOR_EACH (ip_address, &op->od->lb_ips_v4) {
> - ds_put_format(&c_addresses, " %s", ip_address);
> - central_ip_address = true;
> - }
> - SSET_FOR_EACH (ip_address, &op->od->lb_ips_v6) {
> - ds_put_format(&c_addresses, " %s", ip_address);
> - central_ip_address = true;
> + if (routable_only) {
> + SSET_FOR_EACH (ip_address, &op->od->lb_ips_v4_routable) {
> + ds_put_format(&c_addresses, " %s", ip_address);
> + central_ip_address = true;
> + }
> + SSET_FOR_EACH (ip_address, &op->od->lb_ips_v6_routable) {
> + ds_put_format(&c_addresses, " %s", ip_address);
> + central_ip_address = true;
> + }
> + } else {
> + SSET_FOR_EACH (ip_address, &op->od->lb_ips_v4) {
> + ds_put_format(&c_addresses, " %s", ip_address);
> + central_ip_address = true;
> + }
> + SSET_FOR_EACH (ip_address, &op->od->lb_ips_v6) {
> + ds_put_format(&c_addresses, " %s", ip_address);
> + central_ip_address = true;
> + }
> }
>
> if (central_ip_address) {
> @@ -3133,7 +3161,7 @@ ovn_port_update_sbrec(struct northd_context *ctx,
> if (nat_addresses && !strcmp(nat_addresses, "router")) {
> if (op->peer && op->peer->od
> && (chassis || op->peer->od->l3redirect_port)) {
> - nats = get_nat_addresses(op->peer, &n_nats);
> + nats = get_nat_addresses(op->peer, &n_nats, false);
> }
> /* Only accept manual specification of ethernet address
> * followed by IPv4 addresses on type "l3gateway" ports. */
> @@ -3606,11 +3634,18 @@ build_lrouter_lbs(struct hmap *datapaths, struct hmap *lbs)
> ovn_northd_lb_find(lbs,
> &od->nbr->load_balancer[i]->header_.uuid);
> const char *ip_address;
> + bool is_routable = smap_get_bool(&lb->nlb->options, "add_route", false);
> SSET_FOR_EACH (ip_address, &lb->ips_v4) {
> sset_add(&od->lb_ips_v4, ip_address);
> + if (is_routable) {
> + sset_add(&od->lb_ips_v4_routable, ip_address);
> + }
> }
> SSET_FOR_EACH (ip_address, &lb->ips_v6) {
> sset_add(&od->lb_ips_v6, ip_address);
> + if (is_routable) {
> + sset_add(&od->lb_ips_v6_routable, ip_address);
> + }
> }
> }
> }
> diff --git a/northd/ovn_northd.dl b/northd/ovn_northd.dl
> index 35d40ff5a..c9ee742d1 100644
> --- a/northd/ovn_northd.dl
> +++ b/northd/ovn_northd.dl
> @@ -201,7 +201,7 @@ OutProxy_Port_Binding(._uuid = lsp._uuid,
> Some{"router"} -> match ((l3dgw_port, opt_chassis, peer)) {
> (None, None, _) -> set_empty(),
> (_, _, None) -> set_empty(),
> - (_, _, Some{rport}) -> get_nat_addresses(rport)
> + (_, _, Some{rport}) -> get_nat_addresses(rport, false)
> },
> Some{nat_addresses} -> {
> /* Only accept manual specification of ethernet address
> @@ -298,12 +298,16 @@ OutProxy_Port_Binding(._uuid = lrp._uuid,
> }.
> /*
> */
> -function get_router_load_balancer_ips(router: Intern<Router>) :
> +function get_router_load_balancer_ips(router: Intern<Router>,
> + routable_only: bool) :
> (Set<string>, Set<string>) =
> {
> var all_ips_v4 = set_empty();
> var all_ips_v6 = set_empty();
> for (lb in router.lbs) {
> + if (routable_only and not lb.options.get_bool_def("add_route", false)) {
> + continue;
> + };
> for (kv in lb.vips) {
> (var vip, _) = kv;
> /* node->key contains IP:port or just IP. */
> @@ -325,7 +329,7 @@ function get_router_load_balancer_ips(router: Intern<Router>) :
> * external IP addresses of all NAT rules defined on that router, and all
> * of the IP addresses used in load balancer VIPs defined on that router.
> */
> -function get_nat_addresses(rport: Intern<RouterPort>): Set<string> =
> +function get_nat_addresses(rport: Intern<RouterPort>, routable_only: bool): Set<string> =
> {
> var addresses = set_empty();
> var has_redirect = rport.router.l3dgw_port.is_some();
> @@ -337,6 +341,11 @@ function get_nat_addresses(rport: Intern<RouterPort>): Set<string> =
>
> /* Get NAT IP addresses. */
> for (nat in rport.router.nats) {
> + if (routable_only and
> + (nat.nat.__type == "snat" or
> + not nat.nat.options.get_bool_def("add_route", false))) {
> + continue;
> + };
> /* Determine whether this NAT rule satisfies the conditions for
> * distributed NAT processing. */
> if (has_redirect and nat.nat.__type == "dnat_and_snat" and
> @@ -379,7 +388,7 @@ function get_nat_addresses(rport: Intern<RouterPort>): Set<string> =
> };
>
> /* A set to hold all load-balancer vips. */
> - (var all_ips_v4, var all_ips_v6) = get_router_load_balancer_ips(rport.router);
> + (var all_ips_v4, var all_ips_v6) = get_router_load_balancer_ips(rport.router, routable_only);
>
> for (ip_address in set_union(all_ips_v4, all_ips_v6)) {
> c_addresses = c_addresses ++ " ${ip_address}";
> @@ -4105,7 +4114,7 @@ function get_arp_forward_ips(rp: Intern<RouterPort>): (Set<string>, Set<string>)
> var all_ips_v6 = set_empty();
>
> (var lb_ips_v4, var lb_ips_v6)
> - = get_router_load_balancer_ips(rp.router);
> + = get_router_load_balancer_ips(rp.router, false);
> for (a in lb_ips_v4) {
> /* Check if the ovn port has a network configured on which we could
> * expect ARP requests for the LB VIP.
> @@ -5090,7 +5099,7 @@ var residence_check = match (is_redirect) {
> true -> Some{"is_chassis_resident(${router.redirect_port_name})"},
> false -> None
> } in {
> - (var all_ips_v4, _) = get_router_load_balancer_ips(router) in {
> + (var all_ips_v4, _) = get_router_load_balancer_ips(router, false) in {
> if (not all_ips_v4.is_empty()) {
> LogicalRouterArpFlow(.lr = router,
> .lrp = Some{lrp},
> @@ -6504,7 +6513,7 @@ relation RouterPortRoutableAddresses(
> addresses: Set<lport_addresses>)
> RouterPortRoutableAddresses(port.lrp._uuid, addresses) :-
> port in &RouterPort(.is_redirect = true),
> - var addresses = get_nat_addresses(port).filter_map(extract_addresses),
> + var addresses = get_nat_addresses(port, true).filter_map(extract_addresses),
> addresses != set_empty().
>
> /* Return a vector of pairs (1, set[0]), ... (n, set[n - 1]). */
> diff --git a/ovn-nb.xml b/ovn-nb.xml
> index 36a77097c..ad6deb059 100644
> --- a/ovn-nb.xml
> +++ b/ovn-nb.xml
> @@ -1715,6 +1715,18 @@
> option, the force_snat_for_lb option configured for the router
> pipeline will not be applied for this load balancer.
> </column>
> +
> + <column name="options" key="add_route">
> + If set to <code>true</code>, then neighbor routers will have logical
> + flows added that will allow for routing to the VIP IP. It also will
> + have ARP resolution logical flows added. By setting this option, it
> + means there is no reason to create a
> + <ref table="Logical_Router_Static_Route"/> from neighbor routers to
> + this NAT address. It also means that no ARP request is required for
> + neighbor routers to learn the IP-MAC mapping for this VIP IP. For
> + more information about what flows are added for IP routes, please
> + see the <code>ovn-northd</code> manpage section on IP Routing.
> + </column>
> </group>
> </table>
>
> @@ -2059,7 +2071,13 @@
> <code>false</code> by default. It is recommended to set to
> <code>true</code> when a large number of logical routers are
> connected to the same logical switch but most of them never need to
> - send traffic between each other.
> + send traffic between each other. By default, ovn-northd does not
> + create mappings to NAT and load balancer addresess. However, for NAT
> + and load balancer addresses that have the <code>add_route</code>
> + option added, ovn-northd will create logical flows that map NAT and
> + load balancer IP addresses to the appropriate MAC address. Setting
> + <var>dynamic_neigh_routers</var> to <code>true</code> will prevent
> + the automatic creation of these logical flows.
> </p>
> </column>
> <column name="options" key="always_learn_from_arp_request" type='{"type": "boolean"}'>
> @@ -3032,6 +3050,19 @@
> tracking state or not.
> </column>
>
> + <column name="options" key="add_route">
> + If set to <code>true</code>, then neighbor routers will have logical
> + flows added that will allow for routing to the NAT address. It also will
> + have ARP resolution logical flows added. By setting this option, it means
> + there is no reason to create a <ref table="Logical_Router_Static_Route"/>
> + from neighbor routers to this NAT address. It also means that no ARP
> + request is required for neighbor routers to learn the IP-MAC mapping for
> + this NAT address. This option only applies to NATs of type
> + <code>dnat</code> and <code>dnat_and_snat</code>. For more information
> + about what flows are added for IP routes, please see the
> + <code>ovn-northd</code> manpage section on IP Routing.
> + </column>
> +
> <group title="Common Columns">
> <column name="external_ids">
> See <em>External IDs</em> at the beginning of this document.
> diff --git a/tests/ovn-nbctl.at b/tests/ovn-nbctl.at
> index 1058d418a..828777b82 100644
> --- a/tests/ovn-nbctl.at
> +++ b/tests/ovn-nbctl.at
> @@ -465,6 +465,9 @@ AT_CHECK([ovn-nbctl lsp-add ls0 lp0])
> AT_CHECK([ovn-nbctl lr-nat-add lr0 dnat_and_snat 30.0.0.2 192.168.1.2 lp0 00:00:00:01:02], [1], [],
> [ovn-nbctl: invalid mac address 00:00:00:01:02.
> ])
> +AT_CHECK([ovn-nbctl --add-route lr-nat-add lr0 snat 30.0.0.2 192.168.1.2], [1], [],
> +[ovn-nbctl: routes cannot be added for snat types.
> +])
>
> dnl Add snat and dnat
> AT_CHECK([ovn-nbctl lr-nat-add lr0 snat 30.0.0.1 192.168.1.0/24])
> diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
> index feb38ea5e..0c8a09ced 100644
> --- a/tests/ovn-northd.at
> +++ b/tests/ovn-northd.at
> @@ -3887,11 +3887,20 @@ check ovn-nbctl lr-nat-add ro2 dnat 20.0.0.100 192.168.2.100
>
> check_lflows 0
>
> -AS_BOX([Checking that NAT flows are installed for gateway routers])
> +AS_BOX([Checking that non-routable NAT flows are not installed for gateway routers])
>
> check ovn-nbctl lrp-set-gateway-chassis ro1-sw hv1 100
> check ovn-nbctl --wait=sb lrp-set-gateway-chassis ro2-sw hv2 100
>
> +check_lflows 0
> +
> +AS_BOX([Checking that routable NAT flows are installed when gateway chassis exists])
> +
> +check ovn-nbctl lr-nat-del ro1
> +check ovn-nbctl lr-nat-del ro2
> +check ovn-nbctl --add-route lr-nat-add ro1 dnat 10.0.0.100 192.168.1.100
> +check ovn-nbctl --add-route lr-nat-add ro2 dnat 20.0.0.100 192.168.2.100
> +
> check_lflows 1
>
> AS_BOX([Checking that NAT flows are not installed for routers with gateway chassis removed])
> @@ -3925,11 +3934,20 @@ check ovn-nbctl lr-nat-add ro2 dnat_and_snat 20.0.0.100 192.168.2.2 vm2 00:00:00
>
> check_lflows 0
>
> -AS_BOX([Checking that Floating IP NAT flows are installed for gateway routers])
> +AS_BOX([Checking that non-routable Floating IP NAT flows are not installed for gateway routers])
>
> check ovn-nbctl lrp-set-gateway-chassis ro1-sw hv1 100
> check ovn-nbctl --wait=sb lrp-set-gateway-chassis ro2-sw hv2 100
>
> +check_lflows 0
> +
> +AS_BOX([Checking that routable Floating IP NAT flows are installed for gateway routers])
> +check ovn-nbctl lr-nat-del ro1
> +check ovn-nbctl lr-nat-del ro2
> +
> +check ovn-nbctl --add-route lr-nat-add ro1 dnat_and_snat 10.0.0.100 192.168.1.2 vm1 00:00:00:00:00:01
> +check ovn-nbctl --add-route lr-nat-add ro2 dnat_and_snat 20.0.0.100 192.168.2.2 vm2 00:00:00:00:00:02
> +
> check_lflows 1
>
> AS_BOX([Checking that Floating IP NAT flows are not installed for routers with gateway chassis removed])
> @@ -3965,15 +3983,29 @@ check ovn-nbctl lb-add lb1 10.0.0.100 192.168.1.2
> check ovn-nbctl lr-lb-add ro1 lb1
>
> check ovn-nbctl lb-add lb2 20.0.0.100 192.168.2.2
> -check ovn-nbctl lr-lb-add ro2 lb2
> +check ovn-nbctl --wait=sb lr-lb-add ro2 lb2
>
> check_lflows 0
>
> -AS_BOX([Checking that Load Balancer VIP flows are installed for gateway routers])
> +AS_BOX([Checking that non-routable Load Balancer VIP flows are not installed for gateway routers])
>
> check ovn-nbctl lrp-set-gateway-chassis ro1-sw hv1 100
> check ovn-nbctl --wait=sb lrp-set-gateway-chassis ro2-sw hv2 100
>
> +check_lflows 0
> +
> +AS_BOX([Checking that routable Load Balancer VIP flows are installed for gateway routers])
> +
> +check ovn-nbctl lr-lb-del ro1 lb1
> +check ovn-nbctl lr-lb-del ro2 lb2
> +check ovn-nbctl lb-del lb1
> +check ovn-nbctl lb-del lb2
> +
> +check ovn-nbctl --add-route lb-add lb1 10.0.0.100 192.168.1.2
> +check ovn-nbctl --add-route lb-add lb2 20.0.0.100 192.168.2.2
> +check ovn-nbctl lr-lb-add ro1 lb1
> +check ovn-nbctl --wait=sb lr-lb-add ro2 lb2
> +
> check_lflows 1
>
> AS_BOX([Checking that Load Balancer VIP flows are not installed for routers with gateway chassis removed])
> diff --git a/utilities/ovn-nbctl.c b/utilities/ovn-nbctl.c
> index dc13fa9ca..f4a859495 100644
> --- a/utilities/ovn-nbctl.c
> +++ b/utilities/ovn-nbctl.c
> @@ -367,6 +367,7 @@ Policy commands:\n\
> NAT commands:\n\
> [--stateless]\n\
> [--portrange]\n\
> + [--add-route]\n\
> lr-nat-add ROUTER TYPE EXTERNAL_IP LOGICAL_IP [LOGICAL_PORT EXTERNAL_MAC]\n\
> [EXTERNAL_PORT_RANGE]\n\
> add a NAT to ROUTER\n\
> @@ -2703,6 +2704,7 @@ nbctl_lb_add(struct ctl_context *ctx)
> bool add_duplicate = shash_find(&ctx->options, "--add-duplicate") != NULL;
> bool empty_backend_rej = shash_find(&ctx->options, "--reject") != NULL;
> bool empty_backend_event = shash_find(&ctx->options, "--event") != NULL;
> + bool add_route = shash_find(&ctx->options, "--add-route") != NULL;
>
> if (empty_backend_event && empty_backend_rej) {
> ctl_error(ctx,
> @@ -2822,14 +2824,18 @@ nbctl_lb_add(struct ctl_context *ctx)
> smap_add(CONST_CAST(struct smap *, &lb->vips),
> lb_vip_normalized, ds_cstr(&lb_ips_new));
> nbrec_load_balancer_set_vips(lb, &lb->vips);
> + struct smap options = SMAP_INITIALIZER(&options);
> if (empty_backend_rej) {
> - const struct smap options = SMAP_CONST1(&options, "reject", "true");
> - nbrec_load_balancer_set_options(lb, &options);
> + smap_add(&options, "reject", "true");
> }
> if (empty_backend_event) {
> - const struct smap options = SMAP_CONST1(&options, "event", "true");
> - nbrec_load_balancer_set_options(lb, &options);
> + smap_add(&options, "event", "true");
> + }
> + if (add_route) {
> + smap_add(&options, "add_route", "true");
> }
> + nbrec_load_balancer_set_options(lb, &options);
> + smap_destroy(&options);
> out:
> ds_destroy(&lb_ips_new);
>
> @@ -4400,6 +4406,7 @@ nbctl_lr_nat_add(struct ctl_context *ctx)
> char *new_logical_ip = NULL;
> char *new_external_ip = NULL;
> bool is_portrange = shash_find(&ctx->options, "--portrange") != NULL;
> + bool add_route = shash_find(&ctx->options, "--add-route") != NULL;
>
> char *error = lr_by_name_or_uuid(ctx, ctx->argv[1], true, &lr);
> if (error) {
> @@ -4516,6 +4523,11 @@ nbctl_lr_nat_add(struct ctl_context *ctx)
> }
>
> int is_snat = !strcmp("snat", nat_type);
> +
> + if (is_snat && add_route) {
> + ctl_error(ctx, "routes cannot be added for snat types.");
> + goto cleanup;
> + }
> for (size_t i = 0; i < lr->n_nat; i++) {
> const struct nbrec_nat *nat = lr->nat[i];
>
> @@ -4596,6 +4608,7 @@ nbctl_lr_nat_add(struct ctl_context *ctx)
> }
>
> smap_add(&nat_options, "stateless", stateless ? "true":"false");
> + smap_add(&nat_options, "add_route", add_route ? "true": "false");
We can add the option "add_route=true" only if "--add-route" flag is set.
ovn-northd anyway defaults to false if not set. This would save some
NB DB space.
Thanks
Numan
> nbrec_nat_set_options(nat, &nat_options);
>
> smap_destroy(&nat_options);
> @@ -6714,7 +6727,7 @@ static const struct ctl_command_syntax nbctl_commands[] = {
> "ROUTER TYPE EXTERNAL_IP LOGICAL_IP"
> "[LOGICAL_PORT EXTERNAL_MAC] [EXTERNAL_PORT_RANGE]",
> nbctl_pre_lr_nat_add, nbctl_lr_nat_add,
> - NULL, "--may-exist,--stateless,--portrange", RW },
> + NULL, "--may-exist,--stateless,--portrange,--add-route", RW },
> { "lr-nat-del", 1, 3, "ROUTER [TYPE [IP]]",
> nbctl_pre_lr_nat_del, nbctl_lr_nat_del, NULL, "--if-exists", RW },
> { "lr-nat-list", 1, 1, "ROUTER", nbctl_pre_lr_nat_list,
> @@ -6725,7 +6738,7 @@ static const struct ctl_command_syntax nbctl_commands[] = {
> /* load balancer commands. */
> { "lb-add", 3, 4, "LB VIP[:PORT] IP[:PORT]... [PROTOCOL]",
> nbctl_pre_lb_add, nbctl_lb_add, NULL,
> - "--may-exist,--add-duplicate,--reject,--event", RW },
> + "--may-exist,--add-duplicate,--reject,--event,--add-route", RW },
> { "lb-del", 1, 2, "LB [VIP]", nbctl_pre_lb_del, nbctl_lb_del, NULL,
> "--if-exists", RW },
> { "lb-list", 0, 1, "[LB]", nbctl_pre_lb_list, nbctl_lb_list, NULL, "", RO },
> --
> 2.31.1
>
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