]> git.proxmox.com Git - mirror_ovs.git/commitdiff
ovn: l3ha, make is_chassis_active aware of gateway_chassis
authormajopela@redhat.com <majopela@redhat.com>
Thu, 13 Jul 2017 17:02:39 +0000 (17:02 +0000)
committerRussell Bryant <russell@ovn.org>
Sun, 16 Jul 2017 18:53:36 +0000 (14:53 -0400)
is_chassis_active now is only true for redirect-chassis ports
in the case of the specific lport being active on the
local chassis.

This will naturally make the ARP responder / redirection openflow
rules automatically inserted/removed when a router goes active/backup
in a way that BACKUP routers won't respond to ARP on gateway ports,
and they won't route packets that arrive on the wrong gateway
chassis (that can happen until all hypervisors converge in the
new MASTER thanks to the BFD monitoring of the tunnel endpoints).

Signed-off-by: Miguel Angel Ajo <majopela@redhat.com>
Signed-off-by: Russell Bryant <russell@ovn.org>
ovn/controller/binding.c
ovn/controller/gchassis.c
ovn/controller/gchassis.h
ovn/controller/lflow.c
ovn/controller/lflow.h
ovn/controller/lport.c
ovn/controller/lport.h
ovn/controller/ovn-controller.c
ovn/controller/physical.c
ovn/controller/physical.h
tests/ovn.at

index 4744cf0a411d62c364384177f61d5e68a074fbfc..a80671aa9da4713f7ad479d82d7f652938a1355e 100644 (file)
@@ -411,20 +411,10 @@ consider_local_datapath(struct controller_ctx *ctx,
                                                        chassis_index);
         if (gateway_chassis &&
             gateway_chassis_contains(gateway_chassis, chassis_rec)) {
-            struct gateway_chassis *gwc;
-            LIST_FOR_EACH (gwc, node, gateway_chassis) {
-                if (!gwc->db->chassis) {
-                    continue;
-                }
-                if (!strcmp(gwc->db->chassis->name, chassis_rec->name)) {
-                    /* sb_rec_port_binding->chassis should reflect master */
-                    our_chassis = true;
-                    break;
-                }
-                if (sset_contains(active_tunnels, gwc->db->chassis->name)) {
-                    break;
-                }
-            }
+
+            our_chassis = gateway_chassis_is_active(
+                gateway_chassis, chassis_rec, active_tunnels);
+
             add_local_datapath(ldatapaths, lports, binding_rec->datapath,
                                false, local_datapaths);
         }
index 5edcd7f3e11c46eed7a5e6fa17a7118fb40c0c16..fedb4329cd5f8d61693f5603515013124ea6358a 100644 (file)
@@ -17,6 +17,7 @@
 
 #include "gchassis.h"
 #include "lport.h"
+#include "lib/sset.h"
 #include "openvswitch/vlog.h"
 #include "ovn/lib/chassis-index.h"
 #include "ovn/lib/ovn-sb-idl.h"
@@ -110,7 +111,7 @@ gateway_chassis_get_ordered(const struct sbrec_port_binding *binding,
 }
 
 bool
-gateway_chassis_contains(struct ovs_list *gateway_chassis,
+gateway_chassis_contains(const struct ovs_list *gateway_chassis,
                          const struct sbrec_chassis *chassis) {
     struct gateway_chassis *chassis_item;
     if (gateway_chassis) {
@@ -174,3 +175,48 @@ gateway_chassis_in_pb_contains(const struct sbrec_port_binding *binding,
 
     return false;
 }
+
+bool
+gateway_chassis_is_active(const struct ovs_list *gateway_chassis,
+                          const struct sbrec_chassis *local_chassis,
+                          const struct sset *active_tunnels)
+{
+    struct gateway_chassis *gwc;
+
+    if (!gateway_chassis
+        || (gateway_chassis && ovs_list_is_empty(gateway_chassis))) {
+        return false;
+    }
+    /* if there's only one chassis, and local chassis is on the list
+     * it's not HA and it's the equivalent of being active */
+    if (ovs_list_is_singleton(gateway_chassis) &&
+        gateway_chassis_contains(gateway_chassis, local_chassis)) {
+        return true;
+    }
+
+    /* if there are no other tunnels active, we assume that the
+     * connection providing tunneling is down, hence we're down */
+    if (sset_is_empty(active_tunnels)) {
+        return false;
+    }
+
+    /* gateway_chassis is an ordered list, by priority, of chassis
+     * hosting the redirect of the port */
+    LIST_FOR_EACH (gwc, node, gateway_chassis) {
+        if (!gwc->db->chassis) {
+            continue;
+        }
+        /* if we found the chassis on the list, and we didn't exit before
+         * on the active_tunnels check for other higher priority chassis
+         * being active, then this chassis is master. */
+        if (!strcmp(gwc->db->chassis->name, local_chassis->name)) {
+            return true;
+        }
+        /* if we find this specific chassis on the list to have an active
+         * tunnel, then 'local_chassis' is not master */
+        if (sset_contains(active_tunnels, gwc->db->chassis->name)) {
+            return false;
+        }
+    }
+    return false;
+}
index 46d5e4294b1f997431739e70cd7a154d559770a0..c16529e74041c83279095afd3dddc445a93b67ef 100644 (file)
@@ -26,6 +26,7 @@ struct ovsdb_idl;
 struct sbrec_chassis;
 struct sbrec_gateway_chassis;
 struct sbrec_port_binding;
+struct sset;
 
 \f
 /* Gateway_Chassis management
@@ -48,7 +49,7 @@ struct ovs_list *gateway_chassis_get_ordered(
 
 /* Checks if an specific chassis is contained in the gateway_chassis
  * list */
-bool gateway_chassis_contains(struct ovs_list *gateway_chassis,
+bool gateway_chassis_contains(const struct ovs_list *gateway_chassis,
                               const struct sbrec_chassis *chassis);
 
 /* Destroy a gateway_chassis list from memory */
@@ -60,4 +61,11 @@ bool gateway_chassis_in_pb_contains(
         const struct sbrec_port_binding *binding,
         const struct sbrec_chassis *chassis);
 
+/* Returns true if the local chassis is the active gateway among a set
+ * of gateway_chassis.  Return false if the local chassis is currently a
+ * backup in a set of multiple gateway_chassis. */
+bool gateway_chassis_is_active(
+        const struct ovs_list *gateway_chassis,
+        const struct sbrec_chassis *local_chassis,
+        const struct sset *active_tunnels);
 #endif /* ovn/controller/gchassis.h */
index 8cc5e7e2ae325af333a272cf01cb9efc6560adbb..f868e1fe566d0c990e00542f33883e23a28be772 100644 (file)
@@ -54,10 +54,13 @@ struct lookup_port_aux {
 struct condition_aux {
     const struct lport_index *lports;
     const struct sbrec_chassis *chassis;
+    const struct sset *active_tunnels;
+    const struct chassis_index *chassis_index;
 };
 
 static void consider_logical_flow(const struct lport_index *lports,
                                   const struct mcgroup_index *mcgroups,
+                                  const struct chassis_index *chassis_index,
                                   const struct sbrec_logical_flow *lflow,
                                   const struct hmap *local_datapaths,
                                   struct group_table *group_table,
@@ -66,7 +69,8 @@ static void consider_logical_flow(const struct lport_index *lports,
                                   struct hmap *dhcpv6_opts,
                                   uint32_t *conj_id_ofs,
                                   const struct shash *addr_sets,
-                                  struct hmap *flow_table);
+                                  struct hmap *flow_table,
+                                  struct sset *active_tunnels);
 
 static bool
 lookup_port_cb(const void *aux_, const char *port_name, unsigned int *portp)
@@ -97,10 +101,24 @@ is_chassis_resident_cb(const void *c_aux_, const char *port_name)
 
     const struct sbrec_port_binding *pb
         = lport_lookup_by_name(c_aux->lports, port_name);
-    if (pb && pb->chassis && pb->chassis == c_aux->chassis) {
-        return true;
+    if (!pb) {
+        return false;
+    }
+    if (strcmp(pb->type, "chassisredirect")) {
+        /* for non-chassisredirect ports */
+        return pb->chassis && pb->chassis == c_aux->chassis;
     } else {
-        return gateway_chassis_in_pb_contains(pb, c_aux->chassis);
+        struct ovs_list *gateway_chassis;
+        gateway_chassis = gateway_chassis_get_ordered(pb,
+                                                      c_aux->chassis_index);
+        if (gateway_chassis) {
+            bool active = gateway_chassis_is_active(gateway_chassis,
+                                                    c_aux->chassis,
+                                                    c_aux->active_tunnels);
+            gateway_chassis_destroy(gateway_chassis);
+            return active;
+        }
+        return false;
     }
 }
 
@@ -124,11 +142,13 @@ is_gateway_router(const struct sbrec_datapath_binding *ldp,
 static void
 add_logical_flows(struct controller_ctx *ctx, const struct lport_index *lports,
                   const struct mcgroup_index *mcgroups,
+                  const struct chassis_index *chassis_index,
                   const struct hmap *local_datapaths,
                   struct group_table *group_table,
                   const struct sbrec_chassis *chassis,
                   const struct shash *addr_sets,
-                  struct hmap *flow_table)
+                  struct hmap *flow_table,
+                  struct sset *active_tunnels)
 {
     uint32_t conj_id_ofs = 1;
     const struct sbrec_logical_flow *lflow;
@@ -149,10 +169,11 @@ add_logical_flows(struct controller_ctx *ctx, const struct lport_index *lports,
     }
 
     SBREC_LOGICAL_FLOW_FOR_EACH (lflow, ctx->ovnsb_idl) {
-        consider_logical_flow(lports, mcgroups, lflow, local_datapaths,
+        consider_logical_flow(lports, mcgroups, chassis_index,
+                              lflow, local_datapaths,
                               group_table, chassis,
                               &dhcp_opts, &dhcpv6_opts, &conj_id_ofs,
-                              addr_sets, flow_table);
+                              addr_sets, flow_table, active_tunnels);
     }
 
     dhcp_opts_destroy(&dhcp_opts);
@@ -162,6 +183,7 @@ add_logical_flows(struct controller_ctx *ctx, const struct lport_index *lports,
 static void
 consider_logical_flow(const struct lport_index *lports,
                       const struct mcgroup_index *mcgroups,
+                      const struct chassis_index *chassis_index,
                       const struct sbrec_logical_flow *lflow,
                       const struct hmap *local_datapaths,
                       struct group_table *group_table,
@@ -170,7 +192,8 @@ consider_logical_flow(const struct lport_index *lports,
                       struct hmap *dhcpv6_opts,
                       uint32_t *conj_id_ofs,
                       const struct shash *addr_sets,
-                      struct hmap *flow_table)
+                      struct hmap *flow_table,
+                      struct sset *active_tunnels)
 {
     /* Determine translation of logical table IDs to physical table IDs. */
     bool ingress = !strcmp(lflow->pipeline, "ingress");
@@ -267,7 +290,8 @@ consider_logical_flow(const struct lport_index *lports,
         return;
     }
 
-    struct condition_aux cond_aux = { lports, chassis };
+    struct condition_aux cond_aux = { lports, chassis, active_tunnels,
+                                      chassis_index};
     expr = expr_simplify(expr, is_chassis_resident_cb, &cond_aux);
     expr = expr_normalize(expr);
     uint32_t n_conjs = expr_to_matches(expr, lookup_port_cb, &aux,
@@ -393,13 +417,16 @@ lflow_run(struct controller_ctx *ctx,
           const struct sbrec_chassis *chassis,
           const struct lport_index *lports,
           const struct mcgroup_index *mcgroups,
+          const struct chassis_index *chassis_index,
           const struct hmap *local_datapaths,
           struct group_table *group_table,
           const struct shash *addr_sets,
-          struct hmap *flow_table)
+          struct hmap *flow_table,
+          struct sset *active_tunnels)
 {
-    add_logical_flows(ctx, lports, mcgroups, local_datapaths, group_table,
-                      chassis, addr_sets, flow_table);
+    add_logical_flows(ctx, lports, mcgroups, chassis_index, local_datapaths,
+                      group_table, chassis, addr_sets, flow_table,
+                      active_tunnels);
     add_neighbor_flows(ctx, lports, flow_table);
 }
 
index a23cde099437cf59e53fb36ac4885bbbfced46b1..484502f4f723ccbc89d25c8fa07ea90b4ee55b04 100644 (file)
@@ -35,6 +35,7 @@
 
 #include <stdint.h>
 
+struct chassis_index;
 struct controller_ctx;
 struct group_table;
 struct hmap;
@@ -42,6 +43,7 @@ struct lport_index;
 struct mcgroup_index;
 struct sbrec_chassis;
 struct simap;
+struct sset;
 struct uuid;
 
 /* OpenFlow table numbers.
@@ -66,10 +68,12 @@ void lflow_run(struct controller_ctx *,
                const struct sbrec_chassis *chassis,
                const struct lport_index *,
                const struct mcgroup_index *,
+               const struct chassis_index *,
                const struct hmap *local_datapaths,
                struct group_table *group_table,
                const struct shash *addr_sets,
-               struct hmap *flow_table);
+               struct hmap *flow_table,
+               struct sset *active_tunnels);
 void lflow_destroy(void);
 
 #endif /* ovn/lflow.h */
index 906fda222a6bc73457aa647f00f0b1d6da24d8ce..28f5d7726aee937136460b6a9b5062104a41cea9 100644 (file)
 
 #include <config.h>
 
+#include "lib/sset.h"
 #include "lport.h"
 #include "hash.h"
 #include "openvswitch/vlog.h"
 #include "ovn/lib/ovn-sb-idl.h"
-
 VLOG_DEFINE_THIS_MODULE(lport);
 
 static struct ldatapath *ldatapath_lookup_by_key__(
index 8937ecb6cc79776bffe173877f4b89178ec48ef1..9a5a5dad894aa7d96278b6057c41499790046a95 100644 (file)
@@ -26,6 +26,7 @@ struct sbrec_chassis;
 struct sbrec_datapath_binding;
 struct sbrec_port_binding;
 
+
 /* Database indexes.
  * =================
  *
index 97153718e514217200e103605f761ed3f9d52b90..02e6ef5361198b9cd5aa640cbbbf3e2445c97520 100644 (file)
@@ -649,7 +649,6 @@ main(int argc, char *argv[])
                         &chassis_index, &active_tunnels, &local_datapaths,
                         &local_lports);
         }
-
         if (br_int && chassis) {
             struct shash addr_sets = SHASH_INITIALIZER(&addr_sets);
             addr_sets_init(&ctx, &addr_sets);
@@ -668,8 +667,8 @@ main(int argc, char *argv[])
 
                     struct hmap flow_table = HMAP_INITIALIZER(&flow_table);
                     lflow_run(&ctx, chassis, &lports, &mcgroups,
-                              &local_datapaths, &group_table,
-                              &addr_sets, &flow_table);
+                              &chassis_index, &local_datapaths, &group_table,
+                              &addr_sets, &flow_table, &active_tunnels);
 
                     if (chassis_id) {
                         bfd_run(&ctx, br_int, chassis, &local_datapaths,
@@ -678,7 +677,7 @@ main(int argc, char *argv[])
                     physical_run(&ctx, mff_ovn_geneve,
                                  br_int, chassis, &ct_zones, &lports,
                                  &flow_table, &local_datapaths, &local_lports,
-                                 &chassis_index);
+                                 &chassis_index, &active_tunnels);
 
                     ofctrl_put(&flow_table, &pending_ct_zones,
                                get_nb_cfg(ctx.ovnsb_idl));
index 0588d003492b29dce422cee336ade3e287f1460a..1d0fe7fc9e1713ee4b931234b6884b248bff51c9 100644 (file)
@@ -295,6 +295,7 @@ consider_port_binding(enum mf_field_id mff_ovn_geneve,
                       const struct simap *ct_zones,
                       const struct lport_index *lports,
                       const struct chassis_index *chassis_index,
+                      struct sset *active_tunnels,
                       struct hmap *local_datapaths,
                       const struct sbrec_port_binding *binding,
                       const struct sbrec_chassis *chassis,
@@ -362,15 +363,10 @@ consider_port_binding(enum mf_field_id mff_ovn_geneve,
     struct ovs_list *gateway_chassis
         = gateway_chassis_get_ordered(binding, chassis_index);
 
-    /* XXX: later in the series we should insert the next flows only
-     * on the active chassis, and not on all of them. This is useful to
-     * check that the BFD implementation on following patches has
-     * an effect and routes packet by the chassis which is responding,
-     * but later on we should not create those flows on all the
-     * chassis of the gateway_chassis list */
     if (!strcmp(binding->type, "chassisredirect")
         && (binding->chassis == chassis
-            || gateway_chassis_contains(gateway_chassis, chassis))) {
+            || gateway_chassis_is_active(gateway_chassis, chassis,
+                                         active_tunnels))) {
 
         /* Table 33, priority 100.
          * =======================
@@ -865,7 +861,8 @@ physical_run(struct controller_ctx *ctx, enum mf_field_id mff_ovn_geneve,
              const struct simap *ct_zones, struct lport_index *lports,
              struct hmap *flow_table, struct hmap *local_datapaths,
              const struct sset *local_lports,
-             struct chassis_index *chassis_index)
+             struct chassis_index *chassis_index,
+             struct sset *active_tunnels)
 {
 
     /* This bool tracks physical mapping changes. */
@@ -987,7 +984,7 @@ physical_run(struct controller_ctx *ctx, enum mf_field_id mff_ovn_geneve,
     const struct sbrec_port_binding *binding;
     SBREC_PORT_BINDING_FOR_EACH (binding, ctx->ovnsb_idl) {
         consider_port_binding(mff_ovn_geneve, ct_zones, lports,
-                              chassis_index,
+                              chassis_index, active_tunnels,
                               local_datapaths, binding, chassis,
                               &ofpacts, flow_table);
     }
index 901962189542379b6ba935a4d58088833cc674d5..3dfc64c43449837d07ddf67578a4dc57dfd9012c 100644 (file)
@@ -49,6 +49,7 @@ void physical_run(struct controller_ctx *, enum mf_field_id mff_ovn_geneve,
                   const struct simap *ct_zones, struct lport_index *,
                   struct hmap *flow_table, struct hmap *local_datapaths,
                   const struct sset *local_lports,
-                  struct chassis_index *chassis_index);
+                  struct chassis_index *chassis_index,
+                  struct sset *active_tunnels);
 
 #endif /* ovn/physical.h */
index 8cb242caa2ac9eba85fd946bb458186afa227037..e9b5c0ecf3852169d5d661fc0fab9a3aca3064b7 100644 (file)
@@ -7792,17 +7792,25 @@ for chassis in gw1 gw2 hv1 hv2; do
     echo "------ $chassis dump ----------"
     ovs-ofctl show br-int
     ovs-ofctl dump-flows br-int
-    echo ""
-    echo "BFD (from $chassis):"
-    # dump BFD config and status to the other chassis
-    for chassis2 in gw1 gw2 hv1 hv2; do
-        if [[ "$chassis" != "$chassis2" ]]; then
-            echo " -> $chassis2:"
-            echo "   $(ovs-vsctl --bare --columns bfd,bfd_status find Interface name=ovn-$chassis2-0)"
-        fi
-    done
     echo "--------------------------"
 done
+function bfd_dump() {
+    for chassis in gw1 gw2 hv1 hv2; do
+        as $chassis
+        echo "------ $chassis dump (BFD)----"
+        echo "BFD (from $chassis):"
+        # dump BFD config and status to the other chassis
+        for chassis2 in gw1 gw2 hv1 hv2; do
+            if [[ "$chassis" != "$chassis2" ]]; then
+                echo " -> $chassis2:"
+                echo "   $(ovs-vsctl --bare --columns bfd,bfd_status find Interface name=ovn-$chassis2-0)"
+            fi
+        done
+        echo "--------------------------"
+    done
+}
+
+bfd_dump
 
 hv1_gw1_ofport=$(as hv1 ovs-vsctl --bare --columns ofport find Interface name=ovn-gw1-0)
 hv1_gw2_ofport=$(as hv1 ovs-vsctl --bare --columns ofport find Interface name=ovn-gw2-0)
@@ -7820,13 +7828,38 @@ as hv1 ovs-ofctl dump-flows br-int table=32
 echo "--- hv2 ---"
 as hv2 ovs-ofctl dump-flows br-int table=32
 
+gw1_chassis=$(ovn-sbctl --bare --columns=_uuid find Chassis name=gw1)
+gw2_chassis=$(ovn-sbctl --bare --columns=_uuid find Chassis name=gw2)
+
 AT_CHECK([as hv1 ovs-ofctl dump-flows br-int table=32 | grep active_backup | grep slaves:$hv1_gw1_ofport,$hv1_gw2_ofport | wc -l], [0], [1
 ])
 
 AT_CHECK([as hv2 ovs-ofctl dump-flows br-int table=32 | grep active_backup | grep slaves:$hv2_gw1_ofport,$hv2_gw2_ofport | wc -l], [0], [1
 ])
 
-# set higher priority to gw2 instead of gw1, and check for changes
+sleep 3 # let BFD sessions settle so we get the right flows on the right chassis
+
+# make sure that flows for handling the outside router port reside on gw1
+AT_CHECK([as gw1 ovs-ofctl dump-flows br-int table=23 | grep 00:00:02:01:02:04 | wc -l], [0], [[1
+]])
+AT_CHECK([as gw2 ovs-ofctl dump-flows br-int table=23 | grep 00:00:02:01:02:04 | wc -l], [0], [[0
+]])
+
+# make sure ARP responder flows for outside router port reside on gw1 too
+AT_CHECK([as gw1 ovs-ofctl dump-flows br-int table=9 | grep arp_tpa=192.168.0.101 | wc -l], [0], [[1
+]])
+AT_CHECK([as gw2 ovs-ofctl dump-flows br-int table=9 | grep arp_tpa=192.168.0.101 | wc -l], [0], [[0
+]])
+
+
+
+# check that the chassis redirect port has been claimed by the gw1 chassis
+AT_CHECK([ovn-sbctl --columns chassis --bare find Port_Binding logical_port=cr-outside | grep $gw1_chassis | wc -l],
+         [0],[[1
+]])
+
+
+# at this point, we invert the priority of the gw chassis between gw1 and gw2
 
 ovn-nbctl --id=@gc0 create Gateway_Chassis \
                     name=outside_gw1 chassis_name=gw1 priority=10 -- \
@@ -7834,15 +7867,21 @@ ovn-nbctl --id=@gc0 create Gateway_Chassis \
                     name=outside_gw2 chassis_name=gw2 priority=20 -- \
           set Logical_Router_Port outside 'gateway_chassis=[@gc0,@gc1]'
 
+
 # XXX: Let the change propagate down to the ovn-controllers
 ovn-nbctl --wait=hv sync
 
+# we make sure that the hypervisors noticed, and inverted the slave ports
 AT_CHECK([as hv1 ovs-ofctl dump-flows br-int table=32 | grep active_backup | grep slaves:$hv1_gw2_ofport,$hv1_gw1_ofport | wc -l], [0], [1
 ])
 
 AT_CHECK([as hv2 ovs-ofctl dump-flows br-int table=32 | grep active_backup | grep slaves:$hv2_gw2_ofport,$hv2_gw1_ofport | wc -l], [0], [1
 ])
 
+# check that the chassis redirect port has been reclaimed by the gw2 chassis
+AT_CHECK([ovn-sbctl --columns chassis --bare find Port_Binding logical_port=cr-outside | grep $gw2_chassis | wc -l],
+         [0],[[1
+]])
 
 # check BFD enablement on tunnel ports from gw1 #########
 as gw1
@@ -7890,6 +7929,33 @@ AT_CHECK([ovs-vsctl --bare --columns bfd find Interface name=ovn-hv1-0],[0],
          [[enable=false
 ]])
 
+sleep 3  # let BFD sessions settle so we get the right flows on the right chassis
+
+# make sure that flows for handling the outside router port reside on gw2 now
+AT_CHECK([as gw2 ovs-ofctl dump-flows br-int table=23 | grep 00:00:02:01:02:04 | wc -l], [0], [[1
+]])
+AT_CHECK([as gw1 ovs-ofctl dump-flows br-int table=23 | grep 00:00:02:01:02:04 | wc -l], [0], [[0
+]])
+
+# disconnect GW2 from the network, GW1 should take over
+as gw2
+port=${sandbox}_br-phys
+as main ovs-vsctl del-port n1 $port
+sleep 4
+
+bfd_dump
+
+# make sure that flows for handling the outside router port reside on gw2 now
+AT_CHECK([as gw1 ovs-ofctl dump-flows br-int table=23 | grep 00:00:02:01:02:04 | wc -l], [0], [[1
+]])
+AT_CHECK([as gw2 ovs-ofctl dump-flows br-int table=23 | grep 00:00:02:01:02:04 | wc -l], [0], [[0
+]])
+
+# check that the chassis redirect port has been reclaimed by the gw1 chassis
+AT_CHECK([ovn-sbctl --columns chassis --bare find Port_Binding logical_port=cr-outside | grep $gw1_chassis | wc -l],
+         [0],[[1
+]])
+
 OVN_CLEANUP([gw1],[gw2],[hv1],[hv2])
 
 AT_CLEANUP