[ovs-dev,RFC,v2,3/3] OVN: use send_event action to report 'empty_lb_rule' events
diff mbox series

Message ID 0a8a10a9a4d82e128c6c1dcf4cf734da9497b81f.1560254597.git.lorenzo.bianconi@redhat.com
State RFC
Headers show
Series
  • OVN: add Controller Events
Related show

Commit Message

Lorenzo Bianconi June 11, 2019, 12:10 p.m. UTC
Add northd logical flows in order to reports that the controller
received an IP packet for LB rule witn no backends.
This configuration is used by OpenShift to spin up a idle POD

Signed-off-by: Mark Michelson <mmichels@redhat.com>
Co-authored-by: Mark Michelson <mmichels@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
---
 ovn/northd/ovn-northd.c | 33 +++++++++++++++++++++
 ovn/ovn-nb.xml          |  5 ++++
 tests/ovn.at            | 64 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 102 insertions(+)

Patch
diff mbox series

diff --git a/ovn/northd/ovn-northd.c b/ovn/northd/ovn-northd.c
index de0c06d4b..804dca03e 100644
--- a/ovn/northd/ovn-northd.c
+++ b/ovn/northd/ovn-northd.c
@@ -70,6 +70,8 @@  static const char *unixctl_path;
 static struct hmap macam = HMAP_INITIALIZER(&macam);
 static struct eth_addr mac_prefix;
 
+static bool controller_event_en;
+
 #define MAX_OVN_TAGS 4096
 
 /* Pipeline stages. */
@@ -3571,6 +3573,34 @@  build_pre_lb(struct ovn_datapath *od, struct hmap *lflows)
                 sset_add(&all_ips, ip_address);
             }
 
+            if (controller_event_en && !strlen(node->value)) {
+                struct ds match = DS_EMPTY_INITIALIZER;
+                char *action;
+
+                if (addr_family == AF_INET) {
+                    ds_put_format(&match, "ip && ip4.dst == %s && %s",
+                                  ip_address, lb->protocol);
+                } else {
+                    ds_put_format(&match, "ip && ip6.dst == %s && %s",
+                                  ip_address, lb->protocol);
+                }
+                if (port) {
+                    ds_put_format(&match, " && %s.dst == %u", lb->protocol,
+                                  port);
+                }
+                action = xasprintf("trigger_event(event = \"%s\", "
+                               "vip = \"%s\", protocol = \"%s\", "
+                               "load_balancer = \"" UUID_FMT "\");",
+                               event_to_string(OVN_EVENT_EMPTY_LB_BACKENDS),
+                               node->key, lb->protocol,
+                               UUID_ARGS(&lb->header_.uuid));
+                ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_LB, 120,
+                              ds_cstr(&match), action);
+                ds_destroy(&match);
+                free(action);
+                continue;
+            }
+
             free(ip_address);
 
             /* Ignore L4 port information in the key because fragmented packets
@@ -8044,6 +8074,9 @@  ovnnb_db_run(struct northd_context *ctx,
         smap_destroy(&options);
     }
 
+    controller_event_en = smap_get_bool(&nb->options,
+                                        "controller_event", false);
+
     cleanup_macam(&macam);
 }
 
diff --git a/ovn/ovn-nb.xml b/ovn/ovn-nb.xml
index cbaa9495f..c9d4acbe4 100644
--- a/ovn/ovn-nb.xml
+++ b/ovn/ovn-nb.xml
@@ -107,6 +107,11 @@ 
         Configure a given OUI to be used as prefix when L2 address is
         dynamically assigned, e.g. <code>00:11:22</code>
       </column>
+
+      <column name="options" key="controller_event" type='{"type": "boolean"}'>
+        Value used to enable/disable ovn-controller event reporting to the CMS.
+        Please see the <ref table="Controller_Event"/> table in SBDB.
+      </column>
     </group>
 
     <group title="Connection Options">
diff --git a/tests/ovn.at b/tests/ovn.at
index a09f545ab..7cba18734 100644
--- a/tests/ovn.at
+++ b/tests/ovn.at
@@ -14027,3 +14027,67 @@  ovn-hv4-0
 
 OVN_CLEANUP([hv1], [hv2], [hv3])
 AT_CLEANUP
+
+AT_SETUP([ovn -- controller event])
+ovn_start
+
+# Create hypervisors hv[12].
+# Add vif1[12] to hv1, vif2[12] to hv2
+# Add all of the vifs to a single logical switch sw0.
+
+net_add n1
+ovn-nbctl ls-add sw0
+for i in 1 2; do
+    sim_add hv$i
+    as hv$i
+    ovs-vsctl add-br br-phys
+    ovn_attach n1 br-phys 192.168.0.$i
+
+    for j in 1 2; do
+        ovn-nbctl lsp-add sw0 sw0-p$i$j -- \
+                lsp-set-addresses sw0-p$i$j "00:00:00:00:00:$i$j 192.168.1.$i$j"
+
+        ovs-vsctl -- add-port br-int vif$i$j -- \
+                set interface vif$i$j \
+                external-ids:iface-id=sw0-p$i$j \
+                options:tx_pcap=hv$i/vif$i$j-tx.pcap \
+                options:rxq_pcap=hv$i/vif$i$j-rx.pcap \
+                ofport-request=$i$j
+    done
+done
+
+ovn-nbctl --wait=hv set NB_Global . options:controller_event=true
+ovn-nbctl lb-add lb0 192.168.1.100:80 ""
+ovn-nbctl ls-lb-add sw0 lb0
+uuid_lb=$(ovn-nbctl --bare --columns=_uuid find load_balancer name=lb0)
+
+OVN_POPULATE_ARP
+ovn-nbctl --timeout=3 --wait=hv sync
+ovn-sbctl lflow-list
+as hv1 ovs-ofctl dump-flows br-int
+
+packet="inport==\"sw0-p11\" && eth.src==00:00:00:00:00:11 && eth.dst==00:00:00:00:00:21 &&
+       ip4 && ip.ttl==64 && ip4.src==192.168.1.11 && ip4.dst==192.168.1.100 &&
+       tcp && tcp.src==10000 && tcp.dst==80"
+as hv1 ovs-appctl -t ovn-controller inject-pkt "$packet"
+
+ovn-sbctl list controller_event
+uuid=$(ovn-sbctl list controller_event | awk '/_uuid/{print $3}')
+AT_CHECK([ovn-sbctl get controller_event $uuid event_type], [0], [dnl
+empty_lb_backends
+])
+AT_CHECK([ovn-sbctl get controller_event $uuid event_info:vip], [0], [dnl
+"192.168.1.100:80"
+])
+AT_CHECK([ovn-sbctl get controller_event $uuid event_info:protocol], [0], [dnl
+tcp
+])
+AT_CHECK_UNQUOTED([ovn-sbctl get controller_event $uuid event_info:load_balancer], [0], [dnl
+"$uuid_lb"
+])
+AT_CHECK([ovn-sbctl get controller_event $uuid handled], [0], [dnl
+false
+])
+
+OVN_CLEANUP([hv1], [hv2])
+AT_CLEANUP