On Sun, Sep 20, 2020 at 1:33 PM Han Zhou <[email protected]> wrote:
>
>
>
> On Fri, Sep 18, 2020 at 10:37 AM Ihar Hrachyshka <[email protected]>
wrote:
> >
> > User stories:
> > 1) NFV: an admin wants to run two separate instances of OVN controller
> > using the same database but configuring ports on different bridges.
> > Some of these bridges may use DPDK while others may not.
> >
> > 2) Parallel OVN instances: an admin wants to run two separate
> > instances of OVN controller using different databases. The
> > instances are completely independent and serve different consumers.
> > For example, the same machine runs both OpenStack and OpenShift
> > stacks, each running its own separate OVN stack.
> >
> > To serve these use cases, several features should be added to
> > ovn-controller:
> >
> > - use different database configuration for multiple controllers;
> > - customize chassis name used by controller.
> >
> > =====
> >
> > For each of the following database configuration options, their
> > extended chassis specific counterparts are introduced:
> >
> > external_ids:hostname
> > external_ids:ovn-bridge
> > external_ids:ovn-bridge-datapath-type
> > external_ids:ovn-bridge-mappings
> > external_ids:ovn-chassis-mac-mappings
> > external_ids:ovn-cms-options
> > external_ids:ovn-encap-csum
> > external_ids:ovn-encap-ip
> > external_ids:ovn-encap-type
> > external_ids:ovn-is-interconn
> > external_ids:ovn-monitor-all
> > external_ids:ovn-openflow-probe-interval
> > external_ids:ovn-remote
> > external_ids:ovn-remote-probe-interval
> >
> > For example,
> >
> > external_ids:ovn-bridge -> external_ids:ovn-bridge-<chassis-name>=
> > external_ids:ovn-encap-ip -> external_ids:ovn-encap-ip-<chassis-name>=
> > external_ids:ovn-remote -> external_ids:ovn-remote-<chassis-name>=
> >
> > Priority wise, <chassis-name> specific options take precedence.
> >
> > =====
> >
> > For system-id,
> >
> > You can now pass intended chassis name via CLI argument:
> >
> > $ ovn-controller ... -n <chassis_name>
> >
> > Alternatively, you can configure a chassis name by putting it into the
> > ${ovs_sysconfdir}/ovn/system-id-override file before running the
> > controller.
> >
> > The latter option may be more useful in container environment where
> > the same image may be reused for multiple controller instances, where
> > ovs_sysconfigdir/ovn/system-id-override is a volume mounted into this
> > generic image. The override file is read once on startup. If you want
> > to apply a new chassis name to a controller instance, restart it to
> > reread the file.
> >
> > Priority wise, this is the order in which different means to configure
> > the chassis name are used:
> >
> > - ovn-controller ... -n <chassis_name> CLI argument.
> > - ${ovs_sysconfdir}/ovn/system-id-override file;
> > - external_ids:system-id= ovsdb option;
> >
> > =====
> >
> > Concurrent chassis running on the same host may inadvertantly remove
> > patch ports that belong to their peer chassis. To avoid that, patch
> > ports are now tagged in external-ids:owner with the appropriate
> > chassis name, and only patch ports that belong to the chassis are
> > touched when cleaning up. Also, now only tunnels on the active
> > integration bridge are cleaned up.
> >
> > =====
> >
> > Note: this patch assumes that each chassis has its own unique IP.
> > Future work may consider adding support to specify custom port numbers
> > for tunneling that would allow to reuse the same IP address for
> > multiple chassis running on the same host. This work is out of scope
> > for this patch.
> >
> > Signed-off-by: Ihar Hrachyshka <[email protected]>
> >
> > ---
> >
> > v1: initial implementation.
> > v2: fixed test case to check ports are claimed by proper chassis.
> > v2: added NEWS entry.
> > v2: fixed some compiler warnings.
> > v2: moved file_system_id declaration inside a function that uses it.
> > v2: removed unneeded binding.h #include.
> > v2: docs: better explanation of alternatives to select chassis name.
> > v3: reverted priority order for chassis configuration: first CLI, then
> > system-id file, then ovsdb.
> > v4: introduce helpers to extract external-ids (per-chassis or global).
> > v4: introduce per-chassis config options for all keys.
> > v4: introduce -M (--concurrent) CLI argument to avoid patch ports
> > removed by concurrent chassis.
> > v5: rebased.
> > v6: switched from -M (--concurrent) to external-ids:ovn-is-concurrent.
> > v6: with ovn-is-concurrent=true, also avoid removing unknown tunnel
> > endpoints.
> > v7: don't clean up tunnel endpoints from other bridges.
> > v7: don't clean up patch ports that don't belong to the chassis.
> > v7: remove ovn-is-concurrent that is no longer needed.
> > v7: rebased.
> > v8: rename system-id -> /etc/ovn/system-id-override
> > v8: read the system-id-override file just once on startup
> > v8: free() controller_chassis (CLI arg value) on exit
> > v9: updated commit message, removed notion of ovn-is-concurrent.
>
> Thanks Ihar. Please see some more minor comments below.
>
> > ---
> > NEWS | 5 ++
> > controller/chassis.c | 77 ++++++++++++++----------
> > controller/chassis.h | 3 +-
> > controller/encaps.c | 4 ++
> > controller/ovn-controller.8.xml | 13 ++++
> > controller/ovn-controller.c | 99 +++++++++++++++++++++++-------
> > controller/ovn-controller.h | 4 ++
> > controller/patch.c | 19 ++++--
> > controller/physical.c | 2 +-
> > lib/ovn-util.c | 50 ++++++++++++++++
> > lib/ovn-util.h | 18 ++++++
> > ovn-sb.xml | 11 ++--
> > tests/ovn-controller.at | 9 ++-
> > tests/ovn-macros.at | 49 ++++++++++++---
> > tests/ovn.at | 103 +++++++++++++++++++++++++++++++-
> > 15 files changed, 390 insertions(+), 76 deletions(-)
> >
> > diff --git a/NEWS b/NEWS
> > index ee5c2c393..c22466818 100644
> > --- a/NEWS
> > +++ b/NEWS
> > @@ -18,6 +18,11 @@ OVN v20.09.0 - xx xxx xxxx
> > - Added support for external ip based NAT. Now, besides the logical
ip,
> > external ips will also decide if a packet will be NATed or not.
> > - Added support for VXLAN encapsulation (not just for ramp/VTEP
switches).
> > + - Added support for multiple ovn-controller instances on the same
host
> > + (virtual chassis). Now all external-ids:* configuration options
can be
> > + customized for each controller instance running on the same host.
The only
> > + option that is not available per chassis is
external-ids:system-id, which
> > + stands for the chassis name and can be passed via config file or
CLI (-n).
> >
> > OVN v20.06.0
> > --------------------------
> > diff --git a/controller/chassis.c b/controller/chassis.c
> > index a365188e8..989ec5e1a 100644
> > --- a/controller/chassis.c
> > +++ b/controller/chassis.c
> > @@ -125,9 +125,10 @@ chassis_register_ovs_idl(struct ovsdb_idl *ovs_idl)
> > }
> >
> > static const char *
> > -get_hostname(const struct smap *ext_ids)
> > +get_hostname(const struct smap *ext_ids, const char *chassis_id)
> > {
> > - const char *hostname = smap_get_def(ext_ids, "hostname", "");
> > + const char *hostname = get_chassis_external_id_value(
> > + ext_ids, chassis_id, "hostname", "");
> >
> > if (strlen(hostname) == 0) {
> > static char hostname_[HOST_NAME_MAX + 1];
> > @@ -143,39 +144,45 @@ get_hostname(const struct smap *ext_ids)
> > }
> >
> > static const char *
> > -get_bridge_mappings(const struct smap *ext_ids)
> > +get_bridge_mappings(const struct smap *ext_ids, const char *chassis_id)
> > {
> > - return smap_get_def(ext_ids, "ovn-bridge-mappings", "");
> > + return get_chassis_external_id_value(
> > + ext_ids, chassis_id, "ovn-bridge-mappings", "");
> > }
> >
> > const char *
> > -get_chassis_mac_mappings(const struct smap *ext_ids)
> > +get_chassis_mac_mappings(const struct smap *ext_ids, const char
*chassis_id)
> > {
> > - return smap_get_def(ext_ids, "ovn-chassis-mac-mappings", "");
> > + return get_chassis_external_id_value(
> > + ext_ids, chassis_id, "ovn-chassis-mac-mappings", "");
> > }
> >
> > static const char *
> > -get_cms_options(const struct smap *ext_ids)
> > +get_cms_options(const struct smap *ext_ids, const char *chassis_id)
> > {
> > - return smap_get_def(ext_ids, "ovn-cms-options", "");
> > + return get_chassis_external_id_value(
> > + ext_ids, chassis_id, "ovn-cms-options", "");
> > }
> >
> > static const char *
> > -get_monitor_all(const struct smap *ext_ids)
> > +get_monitor_all(const struct smap *ext_ids, const char *chassis_id)
> > {
> > - return smap_get_def(ext_ids, "ovn-monitor-all", "false");
> > + return get_chassis_external_id_value(
> > + ext_ids, chassis_id, "ovn-monitor-all", "false");
> > }
> >
> > static const char *
> > -get_enable_lflow_cache(const struct smap *ext_ids)
> > +get_enable_lflow_cache(const struct smap *ext_ids, const char
*chassis_id)
> > {
> > - return smap_get_def(ext_ids, "ovn-enable-lflow-cache", "true");
> > + return get_chassis_external_id_value(
> > + ext_ids, chassis_id, "ovn-enable-lflow-cache", "true");
> > }
> >
> > static const char *
> > -get_encap_csum(const struct smap *ext_ids)
> > +get_encap_csum(const struct smap *ext_ids, const char *chassis_id)
> > {
> > - return smap_get_def(ext_ids, "ovn-encap-csum", "true");
> > + return get_chassis_external_id_value(
> > + ext_ids, chassis_id, "ovn-encap-csum", "true");
> > }
> >
> > static const char *
> > @@ -189,9 +196,10 @@ get_datapath_type(const struct ovsrec_bridge
*br_int)
> > }
> >
> > static bool
> > -get_is_interconn(const struct smap *ext_ids)
> > +get_is_interconn(const struct smap *ext_ids, const char *chassis_id)
> > {
> > - return smap_get_bool(ext_ids, "ovn-is-interconn", false);
> > + return get_chassis_external_id_value_bool(
> > + ext_ids, chassis_id, "ovn-is-interconn", false);
> > }
> >
> > static void
> > @@ -278,22 +286,27 @@ chassis_parse_ovs_config(const struct
ovsrec_open_vswitch_table *ovs_table,
> > return false;
> > }
> >
> > - const char *encap_type = smap_get(&cfg->external_ids,
"ovn-encap-type");
> > - const char *encap_ips = smap_get(&cfg->external_ids,
"ovn-encap-ip");
> > + const char *chassis_id = get_ovs_chassis_id(cfg);
> > + const struct smap *ext_ids = &cfg->external_ids;
> > +
> > + const char *encap_type = get_chassis_external_id_value(
> > + ext_ids, chassis_id, "ovn-encap-type", NULL);
> > + const char *encap_ips = get_chassis_external_id_value(
> > + ext_ids, chassis_id, "ovn-encap-ip", NULL);
> > if (!encap_type || !encap_ips) {
> > static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
> > VLOG_INFO_RL(&rl, "Need to specify an encap type and ip");
> > return false;
> > }
> >
> > - ovs_cfg->hostname = get_hostname(&cfg->external_ids);
> > - ovs_cfg->bridge_mappings = get_bridge_mappings(&cfg->external_ids);
> > + ovs_cfg->hostname = get_hostname(ext_ids, chassis_id);
> > + ovs_cfg->bridge_mappings = get_bridge_mappings(ext_ids,
chassis_id);
> > ovs_cfg->datapath_type = get_datapath_type(br_int);
> > - ovs_cfg->encap_csum = get_encap_csum(&cfg->external_ids);
> > - ovs_cfg->cms_options = get_cms_options(&cfg->external_ids);
> > - ovs_cfg->monitor_all = get_monitor_all(&cfg->external_ids);
> > - ovs_cfg->chassis_macs =
get_chassis_mac_mappings(&cfg->external_ids);
> > - ovs_cfg->enable_lflow_cache =
get_enable_lflow_cache(&cfg->external_ids);
> > + ovs_cfg->encap_csum = get_encap_csum(ext_ids, chassis_id);
> > + ovs_cfg->cms_options = get_cms_options(ext_ids, chassis_id);
> > + ovs_cfg->monitor_all = get_monitor_all(ext_ids, chassis_id);
> > + ovs_cfg->chassis_macs = get_chassis_mac_mappings(ext_ids,
chassis_id);
> > + ovs_cfg->enable_lflow_cache = get_enable_lflow_cache(ext_ids,
chassis_id);
> >
> > if (!chassis_parse_ovs_encap_type(encap_type,
&ovs_cfg->encap_type_set)) {
> > return false;
> > @@ -311,7 +324,7 @@ chassis_parse_ovs_config(const struct
ovsrec_open_vswitch_table *ovs_table,
> > sset_destroy(&ovs_cfg->encap_ip_set);
> > }
> >
> > - ovs_cfg->is_interconn = get_is_interconn(&cfg->external_ids);
> > + ovs_cfg->is_interconn = get_is_interconn(ext_ids, chassis_id);
> >
> > return true;
> > }
> > @@ -348,7 +361,7 @@ chassis_other_config_changed(const char
*bridge_mappings,
> > const struct sbrec_chassis *chassis_rec)
> > {
> > const char *chassis_bridge_mappings =
> > - get_bridge_mappings(&chassis_rec->other_config);
> > + get_bridge_mappings(&chassis_rec->other_config, NULL);
> >
> > if (strcmp(bridge_mappings, chassis_bridge_mappings)) {
> > return true;
> > @@ -362,28 +375,28 @@ chassis_other_config_changed(const char
*bridge_mappings,
> > }
> >
> > const char *chassis_cms_options =
> > - get_cms_options(&chassis_rec->other_config);
> > + get_cms_options(&chassis_rec->other_config, NULL);
> >
> > if (strcmp(cms_options, chassis_cms_options)) {
> > return true;
> > }
> >
> > const char *chassis_monitor_all =
> > - get_monitor_all(&chassis_rec->other_config);
> > + get_monitor_all(&chassis_rec->other_config, NULL);
> >
> > if (strcmp(monitor_all, chassis_monitor_all)) {
> > return true;
> > }
> >
> > const char *chassis_enable_lflow_cache =
> > - get_enable_lflow_cache(&chassis_rec->other_config);
> > + get_enable_lflow_cache(&chassis_rec->other_config, NULL);
> >
> > if (strcmp(enable_lflow_cache, chassis_enable_lflow_cache)) {
> > return true;
> > }
> >
> > const char *chassis_mac_mappings =
> > - get_chassis_mac_mappings(&chassis_rec->other_config);
> > + get_chassis_mac_mappings(&chassis_rec->other_config, NULL);
> > if (strcmp(chassis_macs, chassis_mac_mappings)) {
> > return true;
> > }
> > @@ -791,7 +804,7 @@ chassis_get_mac(const struct sbrec_chassis
*chassis_rec,
> > struct eth_addr *chassis_mac)
> > {
> > const char *tokens
> > - = get_chassis_mac_mappings(&chassis_rec->other_config);
> > + = get_chassis_mac_mappings(&chassis_rec->other_config, NULL);
> > if (!tokens[0]) {
> > return false;
> > }
> > diff --git a/controller/chassis.h b/controller/chassis.h
> > index 220f726b9..c7345f0fa 100644
> > --- a/controller/chassis.h
> > +++ b/controller/chassis.h
> > @@ -49,7 +49,8 @@ bool chassis_get_mac(const struct sbrec_chassis
*chassis,
> > const char *bridge_mapping,
> > struct eth_addr *chassis_mac);
> > const char *chassis_get_id(void);
> > -const char * get_chassis_mac_mappings(const struct smap *ext_ids);
> > +const char * get_chassis_mac_mappings(const struct smap *ext_ids,
> > + const char *chassis_id);
> >
> >
> > #endif /* controller/chassis.h */
> > diff --git a/controller/encaps.c b/controller/encaps.c
> > index 7eac4bb06..d8e343175 100644
> > --- a/controller/encaps.c
> > +++ b/controller/encaps.c
> > @@ -322,6 +322,9 @@ encaps_run(struct ovsdb_idl_txn *ovs_idl_txn,
> > *
> > * Collect all the OVN-created tunnels into tc.tunnel_hmap. */
> > OVSREC_BRIDGE_TABLE_FOR_EACH (br, bridge_table) {
> > + if (strcmp(br_int->name, br->name)) {
> > + continue;
> > + }
> > for (size_t i = 0; i < br->n_ports; i++) {
> > const struct ovsrec_port *port = br->ports[i];
> > sset_add(&tc.port_names, port->name);
> > @@ -381,6 +384,7 @@ encaps_run(struct ovsdb_idl_txn *ovs_idl_txn,
> > shash_delete(&tc.chassis, node);
> > free(chassis);
> > }
> > +
> > shash_destroy(&tc.chassis);
> > sset_destroy(&tc.port_names);
> > }
> > diff --git a/controller/ovn-controller.8.xml
b/controller/ovn-controller.8.xml
> > index 16bc47b20..4d2c4a2a7 100644
> > --- a/controller/ovn-controller.8.xml
> > +++ b/controller/ovn-controller.8.xml
> > @@ -235,6 +235,19 @@
> > </dd>
> > </dl>
> >
> > + <p>
> > + Note that every <code>external_ids:*</code> key listed above has
its
> > + <code>external_ids:*-chassis_name</code> counterpart keys that
allow to
> > + configure values specific to chassis running on the same OVSDB.
For
> > + example, if two chassis named <code>blue</code> and
<code>red</code> are
> > + available on the same host, then an admin may configure different
> > + <code>ovn-cms-options</code> for each of them by setting
> > + <code>external_ids:ovn-cms-options-blue</code> and
> > + <code>external_ids:ovn-cms-options-red</code> keys in the
database. The
> > + only key that is not available for per-chassis configuration is
> > + <code>external_ids:system-id</code>.
> > + </p>
> > +
> > <p>
> > <code>ovn-controller</code> reads the following values from the
> > <code>Open_vSwitch</code> database of the local OVS instance:
> > diff --git a/controller/ovn-controller.c b/controller/ovn-controller.c
> > index 8d8c678e5..973053dfe 100644
> > --- a/controller/ovn-controller.c
> > +++ b/controller/ovn-controller.c
> > @@ -18,10 +18,14 @@
> > #include "ovn-controller.h"
> >
> > #include <errno.h>
> > +#include <fcntl.h>
> > #include <getopt.h>
> > #include <signal.h>
> > #include <stdlib.h>
> > #include <string.h>
> > +#include <sys/types.h>
> > +#include <sys/stat.h>
> > +#include <unistd.h>
> >
> > #include "bfd.h"
> > #include "binding.h"
> > @@ -85,6 +89,9 @@ static unixctl_cb_func debug_delay_nb_cfg_report;
> >
> > #define CONTROLLER_LOOP_STOPWATCH_NAME "ovn-controller-flow-generation"
> >
> > +static char *controller_chassis = NULL;
> > +static char *system_id_override = NULL;
> > +
> > static char *parse_options(int argc, char *argv[]);
> > OVS_NO_RETURN static void usage(void);
> >
> > @@ -260,7 +267,9 @@ out:
> > static const char *
> > br_int_name(const struct ovsrec_open_vswitch *cfg)
> > {
> > - return smap_get_def(&cfg->external_ids, "ovn-bridge",
DEFAULT_BRIDGE_NAME);
> > + return get_chassis_external_id_value(
> > + &cfg->external_ids, get_ovs_chassis_id(cfg),
> > + "ovn-bridge", DEFAULT_BRIDGE_NAME);
> > }
> >
> > static const struct ovsrec_bridge *
> > @@ -361,8 +370,9 @@ process_br_int(struct ovsdb_idl_txn *ovs_idl_txn,
> > const struct ovsrec_open_vswitch *cfg;
> > cfg = ovsrec_open_vswitch_table_first(ovs_table);
> > ovs_assert(cfg);
> > - const char *datapath_type = smap_get(&cfg->external_ids,
> > -
"ovn-bridge-datapath-type");
> > + const char *datapath_type = get_chassis_external_id_value(
> > + &cfg->external_ids, get_ovs_chassis_id(cfg),
> > + "ovn-bridge-datapath-type", NULL);
> > /* Check for the datapath_type and set it only if it is
defined in
> > * cfg. */
> > if (datapath_type && strcmp(br_int->datapath_type,
datapath_type)) {
> > @@ -372,17 +382,46 @@ process_br_int(struct ovsdb_idl_txn *ovs_idl_txn,
> > return br_int;
> > }
> >
> > -static const char *
> > -get_ovs_chassis_id(const struct ovsrec_open_vswitch_table *ovs_table)
> > +static char *get_file_system_id_override(void)
> > {
> > - const struct ovsrec_open_vswitch *cfg
> > - = ovsrec_open_vswitch_table_first(ovs_table);
> > + char *ret = NULL;
> > + char *filename = xasprintf("%s/ovn/system-id-override",
ovs_sysconfdir());
>
> It should use ovn_sysconfdir(), i.e. by default /etc/ovn/, instead of
/etc/openvswitch/ovn
>
> > + errno = 0;
> > + int fd = open(filename, O_RDONLY);
> > + if (fd != -1) {
> > + char file_system_id[64];
> > + int nread = read(fd, file_system_id, sizeof file_system_id);
> > + if (nread) {
> > + file_system_id[nread] = '\0';
> > + if (file_system_id[nread - 1] == '\n') {
> > + file_system_id[nread - 1] = '\0';
> > + }
> > + ret = xstrdup(file_system_id);
> > + }
> > + close(fd);
> > + }
> > +
> > + free(filename);
> > + return ret;
> > +}
> > +
> > +const char *
> > +get_ovs_chassis_id(const struct ovsrec_open_vswitch *cfg)
> > +{
>
> This function is called in the I-P engine. In I-P engine we require that
no static/global variable should be used. Instead, all the functions should
depend only on the input arguments, to make sure the I-P engine can
correctly handle all the changes of all the dependencies.
> Now this function depends on static variables, but in fact they never
change after ovn-controller starts, so it should be ok. It would be better
if you could add a comment for each of these static variables to clarify
that they never change after initialization thus have no impact on I-P, so
that if someone wants to change it in the future they would know that
something needs to be done to make I-P work.
>
> > + if (controller_chassis) {
> > + return controller_chassis;
> > + }
> > +
> > + if (system_id_override) {
> > + return system_id_override;
> > + }
> > +
> > const char *chassis_id = cfg ? smap_get(&cfg->external_ids,
"system-id")
> > : NULL;
> > -
> > if (!chassis_id) {
> > static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
> > - VLOG_WARN_RL(&rl, "'system-id' in Open_vSwitch database is
missing.");
> > + VLOG_WARN_RL(&rl, "Failed to detect system-id, "
> > + "configuration not found.");
> > }
> >
> > return chassis_id;
> > @@ -477,10 +516,12 @@ static int
> > get_ofctrl_probe_interval(struct ovsdb_idl *ovs_idl)
> > {
> > const struct ovsrec_open_vswitch *cfg =
ovsrec_open_vswitch_first(ovs_idl);
> > - return !cfg ? OFCTRL_DEFAULT_PROBE_INTERVAL_SEC :
> > - smap_get_int(&cfg->external_ids,
> > - "ovn-openflow-probe-interval",
> > - OFCTRL_DEFAULT_PROBE_INTERVAL_SEC);
> > + if (!cfg) {
> > + return OFCTRL_DEFAULT_PROBE_INTERVAL_SEC;
> > + }
> > + return get_chassis_external_id_value_int(
> > + &cfg->external_ids, get_ovs_chassis_id(cfg),
> > + "ovn-openflow-probe-interval",
OFCTRL_DEFAULT_PROBE_INTERVAL_SEC);
> > }
> >
> > /* Retrieves the pointer to the OVN Southbound database from 'ovs_idl'
and
> > @@ -496,18 +537,21 @@ update_sb_db(struct ovsdb_idl *ovs_idl, struct
ovsdb_idl *ovnsb_idl,
> > }
> >
> > /* Set remote based on user configuration. */
> > - const char *remote = smap_get(&cfg->external_ids, "ovn-remote");
> > + const char *chassis_id = get_ovs_chassis_id(cfg);
> > + const char *remote = get_chassis_external_id_value(
> > + &cfg->external_ids, chassis_id, "ovn-remote", NULL);
> > ovsdb_idl_set_remote(ovnsb_idl, remote, true);
> >
> > /* Set probe interval, based on user configuration and the remote.
*/
> > int default_interval = (remote &&
!stream_or_pstream_needs_probes(remote)
> > ? 0 : DEFAULT_PROBE_INTERVAL_MSEC);
> > - int interval = smap_get_int(&cfg->external_ids,
> > - "ovn-remote-probe-interval",
default_interval);
> > + int interval = get_chassis_external_id_value_int(
> > + &cfg->external_ids, chassis_id, "ovn-remote-probe-interval",
> > + default_interval);
> > ovsdb_idl_set_probe_interval(ovnsb_idl, interval);
> >
> > - bool monitor_all = smap_get_bool(&cfg->external_ids,
"ovn-monitor-all",
> > - false);
> > + bool monitor_all = get_chassis_external_id_value_bool(
> > + &cfg->external_ids, chassis_id, "ovn-monitor-all", false);
> > if (monitor_all) {
> > /* Always call update_sb_monitors when monitor_all is true.
> > * Otherwise, don't call it here, because there would be
unnecessary
> > @@ -1166,7 +1210,9 @@ init_binding_ctx(struct engine_node *node,
> > struct ovsrec_bridge_table *bridge_table =
> > (struct ovsrec_bridge_table *)EN_OVSDB_GET(
> > engine_get_input("OVS_bridge", node));
> > - const char *chassis_id = get_ovs_chassis_id(ovs_table);
> > + const struct ovsrec_open_vswitch *cfg =
> > + ovsrec_open_vswitch_table_first(ovs_table);
> > + const char *chassis_id = get_ovs_chassis_id(cfg);
> > const struct ovsrec_bridge *br_int = get_br_int(bridge_table,
ovs_table);
> >
> > ovs_assert(br_int && chassis_id);
> > @@ -2432,6 +2478,10 @@ main(int argc, char *argv[])
> > exiting = false;
> > restart = false;
> > bool sb_monitor_all = false;
> > +
> > + /* Read from system-id-override file once on startup. */
> > + system_id_override = get_file_system_id_override();
> > +
> > while (!exiting) {
> > /* If we're paused just run the unixctl server and skip most
of the
> > * processing loop.
> > @@ -2498,7 +2548,9 @@ main(int argc, char *argv[])
> > sbrec_chassis_private_table_get(ovnsb_idl_loop.idl);
> > const struct ovsrec_bridge *br_int =
> > process_br_int(ovs_idl_txn, bridge_table, ovs_table);
> > - const char *chassis_id = get_ovs_chassis_id(ovs_table);
> > + const struct ovsrec_open_vswitch *cfg =
> > + ovsrec_open_vswitch_table_first(ovs_table);
> > + const char *chassis_id = get_ovs_chassis_id(cfg);
> > const struct sbrec_chassis *chassis = NULL;
> > const struct sbrec_chassis_private *chassis_private = NULL;
> > if (chassis_id) {
> > @@ -2779,6 +2831,8 @@ loop_done:
> > ovsdb_idl_loop_destroy(&ovs_idl_loop);
> > ovsdb_idl_loop_destroy(&ovnsb_idl_loop);
> >
> > + free(controller_chassis);
> > + free(system_id_override);
> > free(ovs_remote);
> > service_stop();
> >
> > @@ -2804,6 +2858,7 @@ parse_options(int argc, char *argv[])
> > STREAM_SSL_LONG_OPTIONS,
> > {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
> > {"bootstrap-ca-cert", required_argument, NULL,
OPT_BOOTSTRAP_CA_CERT},
> > + {"chassis", required_argument, NULL, 'n'},
> > {NULL, 0, NULL, 0}
> > };
> > char *short_options =
ovs_cmdl_long_options_to_short_options(long_options);
> > @@ -2836,6 +2891,10 @@ parse_options(int argc, char *argv[])
> > stream_ssl_set_ca_cert_file(optarg, true);
> > break;
> >
> > + case 'n':
> > + controller_chassis = xstrdup(optarg);
> > + break;
> > +
> > case '?':
> > exit(EXIT_FAILURE);
> >
> > diff --git a/controller/ovn-controller.h b/controller/ovn-controller.h
> > index 5d9466880..9994dd777 100644
> > --- a/controller/ovn-controller.h
> > +++ b/controller/ovn-controller.h
> > @@ -21,6 +21,7 @@
> > #include "lib/ovn-sb-idl.h"
> >
> > struct ovsrec_bridge_table;
> > +struct ovsrec_open_vswitch;
> >
> > /* Linux supports a maximum of 64K zones, which seems like a fine
default. */
> > #define MAX_CT_ZONES 65535
> > @@ -87,4 +88,7 @@ enum chassis_tunnel_type {
> >
> > uint32_t get_tunnel_type(const char *name);
> >
> > +const char *get_ovs_chassis_id(const struct ovsrec_open_vswitch *cfg);
> > +bool is_concurrent_chassis(const struct ovsrec_open_vswitch *cfg);
> > +
> > #endif /* controller/ovn-controller.h */
> > diff --git a/controller/patch.c b/controller/patch.c
> > index a2a7bcd79..39a11c6f6 100644
> > --- a/controller/patch.c
> > +++ b/controller/patch.c
> > @@ -76,6 +76,7 @@ create_patch_port(struct ovsdb_idl_txn *ovs_idl_txn,
> > const char *key, const char *value,
> > const struct ovsrec_bridge *src, const char
*src_name,
> > const struct ovsrec_bridge *dst, const char
*dst_name,
> > + const char *chassis_name,
> > struct shash *existing_ports)
> > {
> > for (size_t i = 0; i < src->n_ports; i++) {
> > @@ -101,7 +102,8 @@ create_patch_port(struct ovsdb_idl_txn *ovs_idl_txn,
> > port = ovsrec_port_insert(ovs_idl_txn);
> > ovsrec_port_set_name(port, src_name);
> > ovsrec_port_set_interfaces(port, &iface, 1);
> > - const struct smap ids = SMAP_CONST1(&ids, key, value);
> > + const struct smap ids = SMAP_CONST2(&ids, key, value,
> > + "owner", chassis_name);
>
> Would "ovn-chassis-id" be better? prefix "ovn-" is added to all ovn
related external-id keys. "chassis-id" tells this is to distinguish
chassis-id, while "owner" is a little opaque, because the value is usually
an uuid and not obviously telling that it is a chassis-id.
>
Sorry that I just noticed "ovn-chassis-id" has been used already for tunnel
ports. So it may be something like "ovn-owner-chassis".
> > ovsrec_port_set_external_ids(port, &ids);
> >
> > struct ovsrec_port **ports;
> > @@ -157,7 +159,9 @@ add_ovs_bridge_mappings(const struct
ovsrec_open_vswitch_table *ovs_table,
> > const char *mappings_cfg;
> > char *cur, *next, *start;
> >
> > - mappings_cfg = smap_get(&cfg->external_ids,
"ovn-bridge-mappings");
> > + mappings_cfg = get_chassis_external_id_value(
> > + &cfg->external_ids, get_ovs_chassis_id(cfg),
> > + "ovn-bridge-mappings", NULL);
> > if (!mappings_cfg || !mappings_cfg[0]) {
> > return;
> > }
> > @@ -269,9 +273,11 @@ add_bridge_mappings(struct ovsdb_idl_txn
*ovs_idl_txn,
> > char *name1 = patch_port_name(br_int->name,
binding->logical_port);
> > char *name2 = patch_port_name(binding->logical_port,
br_int->name);
> > create_patch_port(ovs_idl_txn, patch_port_id,
binding->logical_port,
> > - br_int, name1, br_ln, name2, existing_ports);
> > + br_int, name1, br_ln, name2, chassis->name,
> > + existing_ports);
> > create_patch_port(ovs_idl_txn, patch_port_id,
binding->logical_port,
> > - br_ln, name2, br_int, name1, existing_ports);
> > + br_ln, name2, br_int, name1, chassis->name,
> > + existing_ports);
> > free(name1);
> > free(name2);
> > }
> > @@ -323,6 +329,11 @@ patch_run(struct ovsdb_idl_txn *ovs_idl_txn,
> > SHASH_FOR_EACH_SAFE (port_node, port_next_node, &existing_ports) {
> > port = port_node->data;
> > shash_delete(&existing_ports, port_node);
> > +
> > + const char *owner = smap_get_def(&port->external_ids, "owner",
"");
> > + if (strcmp(owner, chassis->name)) {
> > + continue;
> > + }
>
> For backward compatibility, if the value is "", shall we go ahead and
remove?
>
> In addition, I'd suggest to update the multi controller test case to
cover the behavior of patch port removal.
>
> Thanks,
> Han
>
> > remove_port(bridge_table, port);
> > }
> > shash_destroy(&existing_ports);
> > diff --git a/controller/physical.c b/controller/physical.c
> > index a7f3efd2f..306f7f912 100644
> > --- a/controller/physical.c
> > +++ b/controller/physical.c
> > @@ -432,7 +432,7 @@ populate_remote_chassis_macs(const struct
sbrec_chassis *my_chassis,
> > }
> >
> > const char *tokens
> > - = get_chassis_mac_mappings(&chassis->other_config);
> > + = get_chassis_mac_mappings(&chassis->other_config, NULL);
> >
> > if (!strlen(tokens)) {
> > continue;
> > diff --git a/lib/ovn-util.c b/lib/ovn-util.c
> > index cdb5e18fb..3193b73db 100644
> > --- a/lib/ovn-util.c
> > +++ b/lib/ovn-util.c
> > @@ -641,3 +641,53 @@ str_tolower(const char *orig)
> >
> > return copy;
> > }
> > +
> > +const char *
> > +get_chassis_external_id_value(const struct smap *external_ids,
> > + const char *chassis_id, const char
*option_key,
> > + const char *def)
> > +{
> > + const char *option_value = NULL;
> > + if (chassis_id != NULL) {
> > + char *chassis_option_key = xasprintf("%s-%s", option_key,
chassis_id);
> > + option_value = smap_get(external_ids, chassis_option_key);
> > + free(chassis_option_key);
> > + }
> > + if (!option_value) {
> > + option_value = smap_get_def(external_ids, option_key, def);
> > + }
> > + return option_value;
> > +}
> > +
> > +int
> > +get_chassis_external_id_value_int(const struct smap *external_ids,
> > + const char *chassis_id,
> > + const char *option_key,
> > + int def)
> > +{
> > + const char *value = get_chassis_external_id_value(
> > + external_ids, chassis_id, option_key, NULL);
> > +
> > + int i_value;
> > + if (!value || !str_to_int(value, 10, &i_value)) {
> > + return def;
> > + }
> > +
> > + return i_value;
> > +}
> > +
> > +bool
> > +get_chassis_external_id_value_bool(const struct smap *external_ids,
> > + const char *chassis_id,
> > + const char *option_key,
> > + bool def)
> > +{
> > + const char *value = get_chassis_external_id_value(
> > + external_ids, chassis_id, option_key, "");
> > +
> > + if (def) {
> > + return strcasecmp("false", value) != 0;
> > + } else {
> > + return !strcasecmp("true", value);
> > + }
> > +}
> > diff --git a/lib/ovn-util.h b/lib/ovn-util.h
> > index d9aadcbc0..a1b8f47b5 100644
> > --- a/lib/ovn-util.h
> > +++ b/lib/ovn-util.h
> > @@ -18,6 +18,7 @@
> >
> > #include "lib/packets.h"
> > #include "include/ovn/version.h"
> > +#include "smap.h"
> >
> > #define ovn_set_program_name(name) \
> > ovs_set_program_name(name, OVN_PACKAGE_VERSION)
> > @@ -152,6 +153,23 @@ char *normalize_ipv4_prefix(ovs_be32 ipv4,
unsigned int plen);
> > char *normalize_ipv6_prefix(struct in6_addr ipv6, unsigned int plen);
> > char *normalize_v46_prefix(const struct v46_ip *prefix, unsigned int
plen);
> >
> > +const char *
> > +get_chassis_external_id_value(const struct smap *external_ids,
> > + const char *chassis_id, const char
*option_key,
> > + const char *def);
> > +
> > +int
> > +get_chassis_external_id_value_int(const struct smap *external_ids,
> > + const char *chassis_id,
> > + const char *option_key,
> > + int def);
> > +
> > +bool
> > +get_chassis_external_id_value_bool(const struct smap *external_ids,
> > + const char *chassis_id,
> > + const char *option_key,
> > + bool def);
> > +
> > /* Returns a lowercase copy of orig.
> > * Caller must free the returned string.
> > */
> > diff --git a/ovn-sb.xml b/ovn-sb.xml
> > index 59888a155..e904bc15b 100644
> > --- a/ovn-sb.xml
> > +++ b/ovn-sb.xml
> > @@ -240,10 +240,13 @@
> >
> > <column name="name">
> > OVN does not prescribe a particular format for chassis names.
> > - ovn-controller populates this column using <ref key="system-id"
> > - table="Open_vSwitch" column="external_ids" db="Open_vSwitch"/>
> > - in the Open_vSwitch database's <ref table="Open_vSwitch"
> > - db="Open_vSwitch"/> table. ovn-controller-vtep populates this
> > + ovn-controller populates this column using the
> > + <code>system-id-override</code> configuration file, or
<code>-n</code>
> > + CLI argument, or
>
> It is better to describe in the order of preference: CLI argument ->
configuration file.
>
> > + <ref key="system-id" table="Open_vSwitch" column="external_ids"
> > + db="Open_vSwitch"/> in the Open_vSwitch database's
> > + <ref table="Open_vSwitch" db="Open_vSwitch"/> table.
> > + ovn-controller-vtep populates this
> > column with <ref table="Physical_Switch" column="name"
> > db="hardware_vtep"/> in the hardware_vtep database's
> > <ref table="Physical_Switch" db="hardware_vtep"/> table.
> > diff --git a/tests/ovn-controller.at b/tests/ovn-controller.at
> > index d8061345f..efb48c057 100644
> > --- a/tests/ovn-controller.at
> > +++ b/tests/ovn-controller.at
> > @@ -50,8 +50,7 @@ patch
> > # is mirrored into the Chassis record in the OVN_Southbound db.
> > check_bridge_mappings () {
> > local_mappings=$1
> > - sysid=$(ovs-vsctl get Open_vSwitch . external_ids:system-id)
> > - OVS_WAIT_UNTIL([test x"${local_mappings}" = x$(ovn-sbctl get
Chassis ${sysid} other_config:ovn-bridge-mappings | sed -e 's/\"//g')])
> > + OVS_WAIT_UNTIL([test x"${local_mappings}" = x$(ovn-sbctl get
Chassis ${sandbox} other_config:ovn-bridge-mappings | sed -e 's/\"//g')])
> > }
> >
> > # Initially there should be no patch ports.
> > @@ -133,13 +132,13 @@ ovs-vsctl \
> > -- add-br br-eth2
> > ovn_attach n1 br-phys 192.168.0.1
> >
> > -sysid=$(ovs-vsctl get Open_vSwitch . external_ids:system-id)
> > +sysid=${sandbox}
> >
> > # Make sure that the datapath_type set in the Bridge table
> > # is mirrored into the Chassis record in the OVN_Southbound db.
> > check_datapath_type () {
> > datapath_type=$1
> > - chassis_datapath_type=$(ovn-sbctl get Chassis ${sysid}
other_config:datapath-type | sed -e 's/"//g') #"
> > + chassis_datapath_type=$(ovn-sbctl get Chassis ${sandbox}
other_config:datapath-type | sed -e 's/"//g') #"
> > test "${datapath_type}" = "${chassis_datapath_type}"
> > }
> >
> > @@ -187,7 +186,7 @@ OVS_WAIT_UNTIL([
> > test "${expected_iface_types}" = "${chassis_iface_types}"
> > ])
> >
> > -# Change the value of external_ids:system-id and make sure it's
mirrored
> > +# Set the value of external_ids:system-id and make sure it's mirrored
> > # in the Chassis record in the OVN_Southbound database.
> > sysid=${sysid}-foo
> > ovs-vsctl set Open_vSwitch . external-ids:system-id="${sysid}"
> > diff --git a/tests/ovn-macros.at b/tests/ovn-macros.at
> > index a6719be83..f846c6336 100644
> > --- a/tests/ovn-macros.at
> > +++ b/tests/ovn-macros.at
> > @@ -215,7 +215,7 @@ net_attach () {
> >
> > # ovn_az_attach AZ NETWORK BRIDGE IP [MASKLEN]
> > ovn_az_attach() {
> > - local az=$1 net=$2 bridge=$3 ip=$4 masklen=${5-24}
encap=${6-geneve,vxlan}
> > + local az=$1 net=$2 bridge=$3 ip=$4 masklen=${5-24}
encap=${6-geneve,vxlan} intbr=${7-br-int} chassis=$8
> > net_attach $net $bridge || return 1
> >
> > mac=`ovs-vsctl get Interface $bridge mac_in_use | sed s/\"//g`
> > @@ -229,15 +229,48 @@ ovn_az_attach() {
> > else
> > ovn_remote=unix:$ovs_base/$az/ovn-sb/ovn-sb.sock
> > fi
> > +
> > + if [[ -n "${chassis}" ]]; then
> > + bridge_key=ovn-bridge-${chassis}
> > + remote_key=ovn-remote-${chassis}
> > + encap_type_key=ovn-encap-type-${chassis}
> > + encap_ip_key=ovn-encap-ip-${chassis}
> > + chassis_args="-n $chassis"
> > + chassis_vsctl_args=
> > + else
> > + bridge_key=ovn-bridge
> > + remote_key=ovn-remote
> > + encap_type_key=ovn-encap-type
> > + encap_ip_key=ovn-encap-ip
> > + chassis=$sandbox
> > + chassis_args=
> > + chassis_vsctl_args="-- set Open_vSwitch .
external-ids:system-id=$chassis"
> > + fi
> > +
> > ovs-vsctl \
> > - -- set Open_vSwitch . external-ids:system-id=$sandbox \
> > - -- set Open_vSwitch . external-ids:ovn-remote=$ovn_remote \
> > - -- set Open_vSwitch . external-ids:ovn-encap-type=$encap \
> > - -- set Open_vSwitch . external-ids:ovn-encap-ip=$ip \
> > - -- --may-exist add-br br-int \
> > - -- set bridge br-int fail-mode=secure
other-config:disable-in-band=true \
> > + $chassis_vsctl_args \
> > + -- set Open_vSwitch . external-ids:$bridge_key=$intbr \
> > + -- set Open_vSwitch . external-ids:$remote_key=$ovn_remote \
> > + -- set Open_vSwitch . external-ids:$encap_type_key=$encap \
> > + -- set Open_vSwitch . external-ids:$encap_ip_key=$ip \
> > + -- --may-exist add-br ${intbr} \
> > + -- set bridge ${intbr} fail-mode=secure
other-config:disable-in-band=true \
> > || return 1
> > - start_daemon ovn-controller || return 1
> > +
> > + if [[ "${intbr}" = br-int ]]; then
> > + pidfile="${OVS_RUNDIR}/ovn-controller.pid"
> > + logfile="${OVS_LOGDIR}/ovn-controller.log"
> > + else
> > + pidfile="${OVS_RUNDIR}/ovn-controller-${intbr}.pid"
> > + logfile="${OVS_LOGDIR}/ovn-controller-${chassis}.log"
> > + fi
> > +
> > + ovn-controller \
> > + ${chassis_args} \
> > + -vconsole:off --detach --no-chdir \
> > + --pidfile=${pidfile} \
> > + --log-file=${logfile} || return 1
> > + on_exit "test -e \"$pidfile\" && kill \`cat \"$pidfile\"\`"
> > }
> >
> > # ovn_attach NETWORK BRIDGE IP [MASKLEN]
> > diff --git a/tests/ovn.at b/tests/ovn.at
> > index de1df3b6a..dfe3e02b5 100644
> > --- a/tests/ovn.at
> > +++ b/tests/ovn.at
> > @@ -1727,7 +1727,108 @@ AT_CLEANUP
> >
> > AT_BANNER([OVN end-to-end tests])
> >
> > -# 3 hypervisors, one logical switch, 3 logical ports per hypervisor
> > +AT_SETUP([ovn -- 3 virtual hosts, same node])
> > +AT_KEYWORDS([ovn])
> > +ovn_start
> > +ovn-nbctl ls-add lsw0
> > +net_add n1
> > +sim_add hv
> > +
> > +as hv
> > +for i in 1 2 3; do
> > + chassis=host-$i
> > + ovs-vsctl add-br br-phys-$i
> > + ovn_attach n1 br-phys-$i 192.168.0.$i 24 geneve br-int-$i $chassis
> > +
> > + for j in 1 2 3; do
> > + lpname=lp$i$j
> > + ovn-nbctl lsp-add lsw0 $lpname
> > + ovn-nbctl --wait=hv --timeout=3 lsp-set-options $lpname
requested-chassis=$chassis
> > + ovs-vsctl add-port br-int-$i vif$i$j -- set Interface vif$i$j
external-ids:iface-id=$lpname
> > + OVS_WAIT_UNTIL([test x`ovn-nbctl lsp-get-up $lpname` = xup])
> > +
> > + pb_chassis_id=$(ovn-sbctl --bare --columns chassis list
port_binding $lpname)
> > + pb_chassis_name=$(ovn-sbctl get chassis $pb_chassis_id name)
> > + AT_FAIL_IF([test x$pb_chassis_name != x$chassis])
> > + done
> > +done
> > +
> > +for i in 1 2 3; do
> > + > expout
> > + for vif in 1 2 3; do
> > + echo vif$i$vif >> expout
> > + done
> > + AT_CHECK([ovs-vsctl list-ports br-int-$i | grep vif], [0],
[expout])
> > +done
> > +
> > +AT_CLEANUP
> > +
> > +AT_SETUP([ovn -- system-id in file])
> > +AT_KEYWORDS([ovn])
> > +
> > +ovn_start
> > +net_add n1
> > +sim_add hv
> > +
> > +as hv
> > +
> > +mkdir -p ${OVS_SYSCONFDIR}/ovn
> > +echo otherid > ${OVS_SYSCONFDIR}/ovn/system-id-override
> > +ovs-vsctl add-br br-phys
> > +ovn_attach n1 br-phys 192.168.0.1
> > +
> > +# system-id-override file overrides chassis name selected via cli
> > +echo otherid > expout
> > +AT_CHECK([ovn-sbctl --bare --columns name list chassis], [0], [expout])
> > +
> > +AT_CLEANUP
> > +
> > +AT_SETUP([ovn -- concurrent controllers avoid fighting for each
others' resources])
> > +AT_KEYWORDS([ovn])
> > +
> > +ovn_start
> > +sim_add hv
> > +
> > +for i in 1 2; do
> > + net_add n-$i
> > +done
> > +
> > +as hv
> > +for i in 1 2; do
> > + AT_CHECK([ovn-nbctl ls-add ls-$i])
> > + AT_CHECK([ovn-nbctl lsp-add ls-$i ln_port-$i])
> > + AT_CHECK([ovn-nbctl lsp-set-addresses ln_port-$i unknown])
> > + AT_CHECK([ovn-nbctl lsp-set-type ln_port-$i localnet])
> > + AT_CHECK([ovn-nbctl --wait=hv lsp-set-options ln_port-$i
network_name=phys-$i])
> > +done
> > +
> > +for i in 1 2; do
> > + as hv
> > + ovs-vsctl add-br br-phys-$i
> > + ovs-vsctl set open .
external-ids:ovn-bridge-mappings-hv-$i=phys-$i:br-phys-$i
> > + ovn_attach n-$i br-phys-$i 192.168.0.$i 24 geneve br-int-$i hv-$i
> > +
> > + ovs-vsctl add-port br-int-$i vif-$i -- set Interface vif-$i
external-ids:iface-id=lp-$i
> > + ovn-nbctl lsp-add ls-$i lp-$i
> > + OVS_WAIT_UNTIL([test x`ovn-nbctl lsp-get-up lp-$i` = xup])
> > +done
> > +
> > +# check that both patch ports are present
> > +AT_CHECK([ovs-vsctl --bare --columns=name find interface type="patch"
| awk NF | sort], [0],
> > +[[patch-br-int-1-to-ln_port-1
> > +patch-br-int-2-to-ln_port-2
> > +patch-ln_port-1-to-br-int-1
> > +patch-ln_port-2-to-br-int-2
> > +]])
> > +
> > +# check that both tunnel endpoints are present
> > +AT_CHECK([ovs-vsctl --bare --columns=name find interface type="geneve"
| awk NF | sort], [0],
> > +[[ovn-hv-1-0
> > +ovn-hv-2-0
> > +]])
> > +
> > +AT_CLEANUP
> > +
> > AT_SETUP([ovn -- 3 HVs, 1 LS, 3 lports/HV])
> > AT_KEYWORDS([ovnarp])
> > ovn_start
> > --
> > 2.26.2
> >
> > _______________________________________________
> > dev mailing list
> > [email protected]
> > https://mail.openvswitch.org/mailman/listinfo/ovs-dev
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