OVN: Vlan backed DVR N-S, redirect-type option

Background: With c0974331b7a19a87ab8f1f2cec8fbe366af92fa2, we have added support for E-W workflow for vlan backed DVRs. This series enables N-S workflow for vlan backed DVRs. Key difference between E-W and N-S traffic flow is that N-S flow requires a gateway chassis. A gateway chassis will be respondible for following: a. Doing Network Address Translation (NAT). b. Becoming entry and exit point for North->South and South->North traffic respectively. OVN by default always uses overlay encapsulation to redirect the packet to gateway chassis. This series will enable the redirection to gateway chassis in the absence of encapsulation. This patch: a. Add a new key-value in options of a router port. b. This new config key will be used by ovn-controller to determine if a redirected packet will go out of tunnel port or localnet port. c. key is "redirect-type" and it takes "overlay" and "bridged" as values. d. Added ovn-nbctl command to set and get redirect-type option on a router port. e. This new configuration is added because bridged or overlay based forwarding is considered to be a logical switch property, hence for a router configuration has to be done at the router port level. f. Restored the function ovsdb_datum_to_smap, which helps in ensuring that we do not overwrite existing options, while adding a new key-value pair to it. This function exists in 2.8.5, i am not able to figure out so far, which release/why it was removed. I do not see a harm in adding it back. Signed-off-by: Ankur Sharma <ankur.sharma@nutanix.com> Signed-off-by: 0-day Robot <robot@bytheb.org>
ovsrobot · Aug 28, 2019 · 3f45a30 · 3f45a30
1 parent 3eef0a2
commit 3f45a30
Show file tree

Hide file tree

Showing 5 changed files with 170 additions and 0 deletions.
diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
@@ -2514,6 +2514,9 @@ ovn_port_update_sbrec(struct northd_context *ctx,
         if (op->derived) {
             const char *redirect_chassis = smap_get(&op->nbrp->options,
                                                     "redirect-chassis");
+            const char *redirect_type = smap_get(&op->nbrp->options,
+                                                 "redirect-type");
+
             int n_gw_options_set = 0;
             if (op->nbrp->ha_chassis_group) {
                 n_gw_options_set++;
@@ -2605,6 +2608,9 @@ ovn_port_update_sbrec(struct northd_context *ctx,
                 sbrec_port_binding_set_gateway_chassis(op->sb, NULL, 0);
             }
             smap_add(&new, "distributed-port", op->nbrp->name);
+            if (redirect_type) {
+                smap_add(&new, "redirect-type", redirect_type);
+            }
         } else {
             if (op->peer) {
                 smap_add(&new, "peer", op->peer->key);

diff --git a/ovn-nb.xml b/ovn-nb.xml
@@ -1954,6 +1954,49 @@
           issues.
         </p>
       </column>
+
+      <column name="options" key="redirect-type">
+        <p>
+          This options dictates if a packet redirected to
+          <code>gateway chassis</code> will be overlay encapsulated
+          or go as a regular vlan packet.
+        </p>
+
+        <p>
+          Option takes following values
+        </p>
+
+        <ul>
+          <li>
+            OVERLAY
+          </li>
+
+          <li>
+            BRIDGED
+          </li>
+        </ul>
+
+        <p>
+          OVERLAY option will ensure that redirected packet goes out as
+          encapsulation via the tunnel port.
+        </p>
+
+        <p>
+          BRIDGED option will ensure that redirected packet goes out as vlan
+          tagged via the localnet port.
+        </p>
+
+        <p>
+          OVERLAY is the default redirection type.
+        </p>
+
+        <p>
+          Option is applicable only to gateway chassis attached logical
+          router ports.
+        </p>
+
+      </column>
+
     </group>
 
     <group title="Attachment">

diff --git a/tests/ovn-nbctl.at b/tests/ovn-nbctl.at
@@ -1220,6 +1220,31 @@ lrp0-chassis1     1
 
 dnl ---------------------------------------------------------------------
 
+OVN_NBCTL_TEST([ovn_nbctl_redirect_type], [logical router port redirect type], [
+AT_CHECK([ovn-nbctl lr-add lr0])
+AT_CHECK([ovn-nbctl lrp-add lr0 lrp0 00:00:00:01:02:03 192.168.1.1/24])
+AT_CHECK([ovn-nbctl lrp-get-redirect-type lrp0], [0], [dnl
+overlay
+])
+AT_CHECK([ovn-nbctl lrp-set-redirect-type lp0 bridged], [1], [],
+[ovn-nbctl: lp0: port name not found
+])
+AT_CHECK([ovn-nbctl lrp-set-redirect-type lrp0 bridged], [0], [])
+AT_CHECK([ovn-nbctl lrp-get-redirect-type lrp0], [0], [dnl
+bridged
+])
+AT_CHECK([ovn-nbctl lrp-set-redirect-type lrp0 overlay], [0], [])
+AT_CHECK([ovn-nbctl lrp-get-redirect-type lrp0], [0], [dnl
+overlay
+])
+AT_CHECK([ovn-nbctl lrp-set-redirect-type lrp0 abcd], [1], [],
+[ovn-nbctl: Invalid redirect type: abcd
+])
+
+])
+
+dnl ---------------------------------------------------------------------
+
 OVN_NBCTL_TEST([ovn_nbctl_lrp_enable], [logical router port enable and disable], [
 AT_CHECK([ovn-nbctl lr-add lr0])
 AT_CHECK([ovn-nbctl lrp-add lr0 lrp0 00:00:00:01:02:03 192.168.1.1/24])

diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
@@ -936,3 +936,34 @@ OVS_WAIT_UNTIL([
     test 0 = $?])
 
 AT_CLEANUP
+
+AT_SETUP([ovn -- check Redirect Chassis propagation from NB to SB])
+AT_SKIP_IF([test $HAVE_PYTHON = no])
+ovn_start
+
+ovn-sbctl chassis-add gw1 geneve 127.0.0.1
+
+ovn-nbctl lr-add R1
+ovn-nbctl lrp-add R1 R1-S1 02:ac:10:01:00:01 172.16.1.1/24
+
+ovn-nbctl ls-add S1
+ovn-nbctl lsp-add S1 S1-R1
+ovn-nbctl lsp-set-type S1-R1 router
+ovn-nbctl lsp-set-addresses S1-R1 router
+ovn-nbctl --wait=sb lsp-set-options S1-R1 router-port=R1-S1
+
+ovn-nbctl lrp-set-gateway-chassis R1-S1 gw1
+
+uuid=`ovn-sbctl --columns=_uuid --bare find Port_Binding logical_port=cr-R1-S1`
+echo "CR-LRP UUID is: " $uuid
+
+ovn-nbctl lrp-set-redirect-type R1-S1 bridged
+AT_CHECK([ovn-sbctl get Port_Binding ${uuid} options:redirect-type], [0], [bridged
+])
+
+ovn-nbctl lrp-set-redirect-type R1-S1 overlay
+AT_CHECK([ovn-sbctl get Port_Binding ${uuid} options:redirect-type], [0], [overlay
+])
+
+
+AT_CLEANUP
diff --git a/utilities/ovn-nbctl.c b/utilities/ovn-nbctl.c
@@ -667,6 +667,14 @@ Logical router port commands:\n\
                             ('enabled' or 'disabled')\n\
   lrp-get-enabled PORT      get administrative state PORT\n\
                             ('enabled' or 'disabled')\n\
+  lrp-set-redirect-type PORT TYPE\n\
+                            set whether redirected packet to gateway chassis\n\
+                            of PORT will be encapsulated or not\n\
+                            ('overlay' or 'vlan')\n\
+  lrp-get-redirect-type PORT\n\
+                            get whether redirected packet to gateway chassis\n\
+                            of PORT will be encapsulated or not\n\
+                            ('overlay' or 'vlan')\n\
 \n\
 Route commands:\n\
   [--policy=POLICY] lr-route-add ROUTER PREFIX NEXTHOP [PORT]\n\
@@ -4597,6 +4605,59 @@ nbctl_lrp_get_enabled(struct ctl_context *ctx)
                   !lrp->enabled ||
                   *lrp->enabled ? "enabled" : "disabled");
 }
+
+/* Set the logical router port redirect type. */
+static void
+nbctl_lrp_set_redirect_type(struct ctl_context *ctx)
+{
+    const char *id = ctx->argv[1];
+    const char *type = ctx->argv[2];
+    const struct nbrec_logical_router_port *lrp = NULL;
+    struct smap lrp_options;
+
+    char *error = lrp_by_name_or_uuid(ctx, id, true, &lrp);
+    if (error) {
+        ctx->error = error;
+        return;
+    }
+
+    if (strcasecmp(type, "bridged") && strcasecmp(type, "overlay")) {
+        error = xasprintf("Invalid redirect type: %s", type);
+        ctx->error = error;
+        return;
+    }
+
+    smap_init(&lrp_options);
+    smap_clone(&lrp_options, &lrp->options);
+
+    if (smap_get(&lrp_options, "redirect-type")) {
+        smap_replace(&lrp_options, "redirect-type", type);
+    } else {
+        smap_add(&lrp_options, "redirect-type", type);
+    }
+
+    nbrec_logical_router_port_set_options(lrp, &lrp_options);
+
+    smap_destroy(&lrp_options);
+}
+
+static void
+nbctl_lrp_get_redirect_type(struct ctl_context *ctx)
+{
+    const char *id = ctx->argv[1];
+    const struct nbrec_logical_router_port *lrp = NULL;
+
+    char *error = lrp_by_name_or_uuid(ctx, id, true, &lrp);
+    if (error) {
+        ctx->error = error;
+        return;
+    }
+
+    const char *redirect_type = smap_get(&lrp->options, "redirect-type");
+    ds_put_format(&ctx->output, "%s\n",
+                  !redirect_type ? "overlay": redirect_type);
+}
+
 
 struct ipv4_route {
     int priority;
@@ -5604,6 +5665,10 @@ static const struct ctl_command_syntax nbctl_commands[] = {
       NULL, "", RW },
     { "lrp-get-enabled", 1, 1, "PORT", NULL, nbctl_lrp_get_enabled,
       NULL, "", RO },
+    { "lrp-set-redirect-type", 2, 2, "PORT TYPE", NULL,
+      nbctl_lrp_set_redirect_type, NULL, "", RW },
+    { "lrp-get-redirect-type", 1, 1, "PORT", NULL, nbctl_lrp_get_redirect_type,
+      NULL, "", RO },
 
     /* logical router route commands. */
     { "lr-route-add", 3, 4, "ROUTER PREFIX NEXTHOP [PORT]", NULL,