[ovs-dev] [PATCH v2 2/4 ovn] OVN: Vlan backed DVR N-S, redirect-type option

Ankur Sharma ankur.sharma at nutanix.com
Thu Aug 1 21:09:59 UTC 2019


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
   "vlan" 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 vlan 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.

Signed-off-by: Ankur Sharma <ankur.sharma at nutanix.com>
---
 northd/ovn-northd.c   |  6 ++++++
 ovn-nb.xml            | 43 ++++++++++++++++++++++++++++++++++++++
 tests/ovn-nbctl.at    | 25 ++++++++++++++++++++++
 tests/ovn-northd.at   | 31 +++++++++++++++++++++++++++
 utilities/ovn-nbctl.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 163 insertions(+)

diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
index 979dea4..25c58e8 100644
--- a/northd/ovn-northd.c
+++ b/northd/ovn-northd.c
@@ -2442,6 +2442,9 @@ 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++;
@@ -2534,6 +2537,9 @@ 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
index 57b6edb..a31b4b6 100644
--- a/ovn-nb.xml
+++ b/ovn-nb.xml
@@ -1902,6 +1902,49 @@
           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>
+            VLAN
+          </li>
+        </ul>
+
+        <p>
+          OVERLAY option will ensure that redirected packet goes out as
+          encapsulation via the tunnel port.
+        </p>
+
+        <p>
+          VLAN 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
index a19e33f..11a3273 100644
--- 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 vlan], [1], [],
+[ovn-nbctl: lp0: port name not found
+])
+AT_CHECK([ovn-nbctl lrp-set-redirect-type lrp0 vlan], [0], [])
+AT_CHECK([ovn-nbctl lrp-get-redirect-type lrp0], [0], [dnl
+vlan
+])
+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
index 62e58fd..2055ce3 100644
--- a/tests/ovn-northd.at
+++ b/tests/ovn-northd.at
@@ -898,3 +898,34 @@ as northd
 OVS_APP_EXIT_AND_WAIT([ovn-northd])
 
 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 vlan
+AT_CHECK([ovn-sbctl get Port_Binding ${uuid} options:redirect-type], [0], [vlan
+])
+
+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
index ad999dd..991bee5 100644
--- a/utilities/ovn-nbctl.c
+++ b/utilities/ovn-nbctl.c
@@ -661,6 +661,14 @@ 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\
@@ -4591,6 +4599,52 @@ 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, "vlan") && strcasecmp(type, "overlay")) {
+        error = xasprintf("Invalid redirect type: %s", type);
+        ctx->error = error;
+        return;
+    }
+
+    smap_init(&lrp_options);
+    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;
@@ -5598,6 +5652,10 @@ 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,
-- 
1.8.3.1



More information about the dev mailing list