On 22 March 2017 at 21:25, Numan Siddique <[email protected]> wrote:
> > > On Wed, Mar 22, 2017 at 10:43 PM, Guru Shetty <[email protected]> wrote: > >> >> >> On 22 March 2017 at 09:51, Guru Shetty <[email protected]> wrote: >> >>> >>> >>> On 13 March 2017 at 00:32, <[email protected]> wrote: >>> >>>> From: Numan Siddique <[email protected]> >>>> >>>> OVN implements native DNS resolution which can be used to resolve the >>>> internal DNS names belonging to a logical datapath. >>>> >>>> To support this, the logical ports should be configured with the >>>> hostname in the 'Logical_Switch_Port.options:hostname' and an optional >>>> fqdn in 'Logical_Switch_Port.options:fqdn'. >>>> >>>> For each logical datapath with atleast one of its logical port >>>> configured with hostname in the options field, following flows are >>>> added >>>> - A logical flow in DNS_LKUP stage which uses the action 'dns_lookup' >>>> which transforms the DNS query to DNS reply packet and advances >>>> to the next stage - DNS_RESPONSE. >>>> >>>> - A logical flow in DNS_RESPONSE stage which implements the DNS >>>> responder >>>> by sending the DNS reply from previous stage back to the inport. >>>> >>>> Signed-off-by: Numan Siddique <[email protected]> >>>> >>> >>> Would this work if there is a logical router connecting 2 switches and >>> the logical ports try to communicate across the router? >>> >>> I had a use case, where in I wanted to give a DNS name to a VIP of a OVN >>> load-balancer. And that would not work with this model. >>> >>> What if we have a DNS table in NB and then link it to the logical >>> switches? Each record in the table is a map of hostname:IP. And then we can >>> have a column in logical switch for DNS that links to the DNS table? >>> Something similar to the way we add load-balancers to logical switches. >>> >>> Corrections: >> What if we have a DNS table in NB and then link it to the logical >> switches? Each record in the table is a map of multiple hostname:IP. >> records. And then we can have a column in logical switch for DNS that >> links to the DNS table? Something similar to the way we add >> load-balancers to logical switches. This way, someone can create one DNS >> table entry per logical topology and link it to all the logical switches of >> the topology. >> >> > > Thanks Guru for the comments. I thought about this use case. > > The proposed DNS table in the SB DB (in this patch) has a column > "datapath". I thought of supporting this use case by making the "datapath" > column in the SB DB as a list. > > For example, If there are two logical switches (sw0, sw1) connected to > logical router lr0 and the logical port sw0-port0 is configured with a > hostname (say "VM1") in its options, then ovn-northd would create a DNS > row in the SB DB with datapath set as ["sw0-datapath-id", > "sw1-datapath-id"]. > When ovn-controller receives the DNS packet it would match the hostname > and the datapath id of the incoming packet from this "datapath" column. If > any port belonging to either of the switches, sends a DNS lookup for "VM1", > it would be resolved to the IP address of sw0-port0. > > Is this approach reasonable ? From CMS perspective, I think it would be a > lot easier if we don't have DNS table in NB DB. > I dropped the idea earlier, as the code in ovn-northd to set the > "datapath" was getting a bit complicated. > How would we be able to provide DNS names to VIPs of load-balancers in this case? > > If this is fine, I can revise the patch. > > Thanks > Numan > > > > >>> >>> >>> >>>> --- >>>> ovn/northd/ovn-northd.8.xml | 88 +++++++++++- >>>> ovn/northd/ovn-northd.c | 181 ++++++++++++++++++++++- >>>> ovn/ovn-nb.xml | 18 ++- >>>> tests/ovn.at | 340 ++++++++++++++++++++++++++++++ >>>> ++++++++++++++ >>>> 4 files changed, 618 insertions(+), 9 deletions(-) >>>> >>>> diff --git a/ovn/northd/ovn-northd.8.xml b/ovn/northd/ovn-northd.8.xml >>>> index ab8fd88..a3fe2a8 100644 >>>> --- a/ovn/northd/ovn-northd.8.xml >>>> +++ b/ovn/northd/ovn-northd.8.xml >>>> @@ -724,7 +724,73 @@ output; >>>> </li> >>>> </ul> >>>> >>>> - <h3>Ingress Table 13 Destination Lookup</h3> >>>> + <h3>Ingress Table 13 DNS Lookup</h3> >>>> + >>>> + <p> >>>> + This table looks up and resolves the DNS names of the logical >>>> ports >>>> + if configured with the host names. >>>> + </p> >>>> + >>>> + <ul> >>>> + <li> >>>> + <p> >>>> + A priority-100 logical flow for each logical switch data path >>>> + if at least one of its logical port is configured with >>>> + <code>hostname</code> which matches the IPv4 and IPv6 >>>> packets with >>>> + <code>udp.src</code> = 53 and applies the action >>>> + <code>dns_lkup</code> and advances the packet to the next >>>> table. >>>> + </p> >>>> + >>>> + <pre> >>>> +reg0[4] = dns_lkup(); next; >>>> + </pre> >>>> + >>>> + <p> >>>> + For valid DNS packets, this transforms the packet into a DNS >>>> + reply if the DNS name can be resolved, and stores 1 into >>>> reg0[4]. >>>> + For failed DNS resolution or other kinds of packets, it just >>>> stores >>>> + 0 into reg0[4]. Either way, it continues to the next table. >>>> + </p> >>>> + </li> >>>> + </ul> >>>> + >>>> + <h3>Ingress Table 14 DNS Responses</h3> >>>> + >>>> + <p> >>>> + This table implements DNS responder for the DNS replies >>>> generated by >>>> + the previous table. >>>> + </p> >>>> + >>>> + <ul> >>>> + <li> >>>> + <p> >>>> + A priority-100 logical flow for each logical switch data path >>>> + if at least one of its logical port is configured with >>>> + <code>hostname</code> which matches IPv4 and IPv6 packets >>>> with >>>> + <code>udp.src == 53 && reg0[4] == 1</code> and >>>> responds >>>> + back to the <code>inport</code> after applying these >>>> + actions. If <code>reg0[4]</code> is set to 1, it means that >>>> the >>>> + action <code>dns_lkup</code> was successful. >>>> + </p> >>>> + >>>> + <pre> >>>> +eth.dst <-> eth.src; >>>> +ip4.src <-> ip4.dst; >>>> +udp.dst = udp.src; >>>> +udp.src = 53; >>>> +outport = <var>P</var>; >>>> +flags.loopback = 1; >>>> +output; >>>> + </pre> >>>> + >>>> + <p> >>>> + (This terminates ingress packet processing; the packet does >>>> not go >>>> + to the next ingress table.) >>>> + </p> >>>> + </li> >>>> + </ul> >>>> + >>>> + <h3>Ingress Table 15 Destination Lookup</h3> >>>> >>>> <p> >>>> This table implements switching behavior. It contains these >>>> logical >>>> @@ -834,11 +900,23 @@ output; >>>> </p> >>>> >>>> <p> >>>> - Also a priority 34000 logical flow is added for each logical >>>> port which >>>> - has DHCPv4 options defined to allow the DHCPv4 reply packet and >>>> which has >>>> - DHCPv6 options defined to allow the DHCPv6 reply packet from the >>>> - <code>Ingress Table 12: DHCP responses</code>. >>>> + Also the following flows are added. >>>> </p> >>>> + <ul> >>>> + <li> >>>> + A Priority 34000 logical flow is added for each logical port >>>> which >>>> + has DHCPv4 options defined to allow the DHCPv4 reply packet >>>> and which has >>>> + DHCPv6 options defined to allow the DHCPv6 reply packet from >>>> the >>>> + <code>Ingress Table 12: DHCP responses</code>. >>>> + </li> >>>> + >>>> + <li> >>>> + A Priority 34000 logical flow for each logical switch data >>>> path if at >>>> + least one of its logical port is configured with hostname >>>> + which allows the DNS reply packet from the >>>> + <code>Ingress Table 14:DNS responses</code>. >>>> + </li> >>>> + </ul> >>>> >>>> <h3>Egress Table 7: Egress Port Security - IP</h3> >>>> >>>> diff --git a/ovn/northd/ovn-northd.c b/ovn/northd/ovn-northd.c >>>> index cc9b934..8fa42fc 100644 >>>> --- a/ovn/northd/ovn-northd.c >>>> +++ b/ovn/northd/ovn-northd.c >>>> @@ -112,7 +112,9 @@ enum ovn_stage { >>>> PIPELINE_STAGE(SWITCH, IN, ARP_ND_RSP, 10, "ls_in_arp_rsp") >>>> \ >>>> PIPELINE_STAGE(SWITCH, IN, DHCP_OPTIONS, 11, >>>> "ls_in_dhcp_options") \ >>>> PIPELINE_STAGE(SWITCH, IN, DHCP_RESPONSE, 12, >>>> "ls_in_dhcp_response") \ >>>> - PIPELINE_STAGE(SWITCH, IN, L2_LKUP, 13, "ls_in_l2_lkup") >>>> \ >>>> + PIPELINE_STAGE(SWITCH, IN, DNS_LOOKUP, 13, >>>> "ls_in_dns_lookup") \ >>>> + PIPELINE_STAGE(SWITCH, IN, DNS_RESPONSE, 14, >>>> "ls_in_dns_response") \ >>>> + PIPELINE_STAGE(SWITCH, IN, L2_LKUP, 15, "ls_in_l2_lkup") >>>> \ >>>> \ >>>> /* Logical switch egress stages. */ \ >>>> PIPELINE_STAGE(SWITCH, OUT, PRE_LB, 0, "ls_out_pre_lb") \ >>>> @@ -160,6 +162,7 @@ enum ovn_stage { >>>> #define REGBIT_CONNTRACK_COMMIT "reg0[1]" >>>> #define REGBIT_CONNTRACK_NAT "reg0[2]" >>>> #define REGBIT_DHCP_OPTS_RESULT "reg0[3]" >>>> +#define REGBIT_DNS_LOOKUP_RESULT "reg0[4]" >>>> >>>> /* Register definitions for switches and routers. */ >>>> #define REGBIT_NAT_REDIRECT "reg9[0]" >>>> @@ -2817,7 +2820,13 @@ build_acls(struct ovn_datapath *od, struct hmap >>>> *lflows) >>>> } >>>> >>>> /* Add 34000 priority flow to allow DHCP reply from ovn-controller >>>> to all >>>> - * logical ports of the datapath if the CMS has configured DHCPv4 >>>> options*/ >>>> + * logical ports of the datapath if the CMS has configured DHCPv4 >>>> options. >>>> + * >>>> + * Add one 34000 priority flow to allow DNS reply from >>>> ovn-controller to all >>>> + * logical ports of the datapath if the CMS has configured DNS >>>> parameters >>>> + * for atleast one logical port. >>>> + * */ >>>> + bool dns_flow_added = false; >>>> for (size_t i = 0; i < od->nbs->n_ports; i++) { >>>> if (od->nbs->ports[i]->dhcpv4_options) { >>>> const char *server_id = smap_get( >>>> @@ -2869,6 +2878,16 @@ build_acls(struct ovn_datapath *od, struct hmap >>>> *lflows) >>>> ds_destroy(&match); >>>> } >>>> } >>>> + >>>> + if (!dns_flow_added && smap_get(&od->nbs->ports[i]->options, >>>> + "hostname")) { >>>> + const char *actions = has_stateful ? "ct_commit; next;" : >>>> + "next;"; >>>> + ovn_lflow_add( >>>> + lflows, od, S_SWITCH_OUT_ACL, 34000, "udp && udp.src >>>> == 53", >>>> + actions); >>>> + dns_flow_added = true; >>>> + } >>>> } >>>> } >>>> >>>> @@ -3307,8 +3326,51 @@ build_lswitch_flows(struct hmap *datapaths, >>>> struct hmap *ports, >>>> } >>>> } >>>> >>>> + HMAP_FOR_EACH (od, key_node, datapaths) { >>>> + if (!od->nbs) { >>>> + continue; >>>> + } >>>> + >>>> + for (size_t i = 0; i < od->nbs->n_ports; i++) { >>>> + const struct nbrec_logical_switch_port *nbsp = >>>> + od->nbs->ports[i]; >>>> + >>>> + if (!nbsp || !od->sb || !smap_get( ->options, >>>> "hostname")) { >>>> + continue; >>>> + } >>>> + >>>> + struct ds match; >>>> + struct ds action; >>>> + ds_init(&match); >>>> + ds_init(&action); >>>> + ds_put_cstr(&match, "ip && udp.dst == 53"); >>>> + ds_put_format(&action, >>>> + REGBIT_DNS_LOOKUP_RESULT" = dns_lookup(); >>>> next;"); >>>> + ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_LOOKUP, 100, >>>> + ds_cstr(&match), ds_cstr(&action)); >>>> + ds_clear(&action); >>>> + ds_put_cstr(&match, " && "REGBIT_DNS_LOOKUP_RESULT); >>>> + ds_put_format(&action, "eth.dst <-> eth.src; ip4.src <-> >>>> ip4.dst; " >>>> + "udp.dst = udp.src; udp.src = 53; outport = >>>> inport; " >>>> + "flags.loopback = 1; output;"); >>>> + ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_RESPONSE, 100, >>>> + ds_cstr(&match), ds_cstr(&action)); >>>> + ds_clear(&action); >>>> + ds_put_format(&action, "eth.dst <-> eth.src; ip6.src <-> >>>> ip6.dst; " >>>> + "udp.dst = udp.src; udp.src = 53; outport = >>>> inport; " >>>> + "flags.loopback = 1; output;"); >>>> + ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_RESPONSE, 100, >>>> + ds_cstr(&match), ds_cstr(&action)); >>>> + ds_destroy(&match); >>>> + ds_destroy(&action); >>>> + break; >>>> + } >>>> + } >>>> + >>>> /* Ingress table 11 and 12: DHCP options and response, by default >>>> goto next. >>>> - * (priority 0). */ >>>> + * (priority 0). >>>> + * Ingress table 13 and 14: DNS lookup and response, by default >>>> goto next. >>>> + * (priority 0).*/ >>>> >>>> HMAP_FOR_EACH (od, key_node, datapaths) { >>>> if (!od->nbs) { >>>> @@ -3317,6 +3379,8 @@ build_lswitch_flows(struct hmap *datapaths, >>>> struct hmap *ports, >>>> >>>> ovn_lflow_add(lflows, od, S_SWITCH_IN_DHCP_OPTIONS, 0, "1", >>>> "next;"); >>>> ovn_lflow_add(lflows, od, S_SWITCH_IN_DHCP_RESPONSE, 0, "1", >>>> "next;"); >>>> + ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_LOOKUP, 0, "1", >>>> "next;"); >>>> + ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_RESPONSE, 0, "1", >>>> "next;"); >>>> } >>>> >>>> /* Ingress table 13: Destination lookup, broadcast and multicast >>>> handling >>>> @@ -5246,6 +5310,112 @@ sync_address_sets(struct northd_context *ctx) >>>> } >>>> shash_destroy(&sb_address_sets); >>>> } >>>> + >>>> +static void >>>> +sync_dns_entries(struct northd_context *ctx, struct hmap *ports) >>>> +{ >>>> + struct dns_info { >>>> + struct hmap_node hmap_node; >>>> + const struct sbrec_datapath_binding *sb; >>>> + const char *hostname; >>>> + char **ip_addresses; >>>> + size_t n_ip_addresses; >>>> + }; >>>> + >>>> + struct hmap dns_map = HMAP_INITIALIZER(&dns_map); >>>> + struct ovn_port *op; >>>> + >>>> + HMAP_FOR_EACH (op, key_node, ports) { >>>> + if (!op->nbsp || !op->sb || !lsp_is_enabled(op->nbsp) || >>>> op->nbrp) { >>>> + continue; >>>> + } >>>> + >>>> + const char *hostname = smap_get(&op->nbsp->options, >>>> "hostname"); >>>> + if (!hostname) { >>>> + continue; >>>> + } >>>> + >>>> + struct dns_info *dns_info = xzalloc(sizeof *dns_info); >>>> + dns_info->sb = op->sb->datapath; >>>> + dns_info->hostname = hostname; >>>> + for (unsigned int i = 0; i < op->n_lsp_addrs; i++) { >>>> + for (size_t j = 0; j < op->lsp_addrs[i].n_ipv4_addrs; >>>> j++) { >>>> + dns_info->ip_addresses = xrealloc( >>>> + dns_info->ip_addresses, >>>> + sizeof *dns_info->ip_addresses * ( >>>> + dns_info->n_ip_addresses + 1)); >>>> + dns_info->ip_addresses[dns_info->n_ip_addresses++] = >>>> + op->lsp_addrs[i].ipv4_addrs[j].addr_s; >>>> + } >>>> + >>>> + for (size_t j = 0; j < op->lsp_addrs[i].n_ipv6_addrs; >>>> j++) { >>>> + dns_info->ip_addresses = xrealloc( >>>> + dns_info->ip_addresses, >>>> + sizeof *dns_info->ip_addresses * ( >>>> + dns_info->n_ip_addresses + 1)); >>>> + dns_info->ip_addresses[dns_info->n_ip_addresses++] = >>>> + op->lsp_addrs[i].ipv6_addrs[j].addr_s; >>>> + } >>>> + } >>>> + size_t hash = uuid_hash(&dns_info->sb->header_.uuid); >>>> + hash = hash_string(dns_info->hostname, hash); >>>> + hmap_insert(&dns_map, &dns_info->hmap_node, hash); >>>> + } >>>> + >>>> + const struct sbrec_dns *sbrec_dns, *next; >>>> + SBREC_DNS_FOR_EACH_SAFE(sbrec_dns, next, ctx->ovnsb_idl) { >>>> + size_t hash = uuid_hash(&sbrec_dns->datapath->header_.uuid); >>>> + hash = hash_string(sbrec_dns->hostname, hash); >>>> + bool delete_dns_record = true; >>>> + struct dns_info *dns_info; >>>> + HMAP_FOR_EACH_WITH_HASH(dns_info, hmap_node, hash, &dns_map) { >>>> + if (!strcmp(dns_info->hostname, sbrec_dns->hostname)) { >>>> + /* Verify that the IP addresses are same before >>>> removing from >>>> + * the hmap. */ >>>> + if (dns_info->n_ip_addresses != >>>> sbrec_dns->n_ip_addresses) { >>>> + continue; >>>> + } >>>> + >>>> + delete_dns_record = false; >>>> + for (size_t i = 0; i < sbrec_dns->n_ip_addresses; i++) >>>> { >>>> + if (strcmp(dns_info->ip_addresses[i], >>>> + sbrec_dns->ip_addresses[i])) { >>>> + delete_dns_record = true; >>>> + break; >>>> + } >>>> + } >>>> + >>>> + if (delete_dns_record) { >>>> + continue; >>>> + } >>>> + >>>> + hmap_remove(&dns_map, &dns_info->hmap_node); >>>> + free(dns_info->ip_addresses); >>>> + free(dns_info); >>>> + delete_dns_record = false; >>>> + break; >>>> + } >>>> + } >>>> + >>>> + if (delete_dns_record) { >>>> + sbrec_dns_delete(sbrec_dns); >>>> + } >>>> + } >>>> + >>>> + struct dns_info *dns_info; >>>> + HMAP_FOR_EACH_POP(dns_info, hmap_node, &dns_map) { >>>> + struct sbrec_dns *sbrec_dns = sbrec_dns_insert(ctx->ovnsb_tx >>>> n); >>>> + sbrec_dns_set_datapath(sbrec_dns, dns_info->sb); >>>> + sbrec_dns_set_hostname(sbrec_dns, dns_info->hostname); >>>> + sbrec_dns_set_ip_addresses( >>>> + sbrec_dns, (const char **) dns_info->ip_addresses, >>>> + dns_info->n_ip_addresses); >>>> + free(dns_info->ip_addresses); >>>> + free(dns_info); >>>> + } >>>> + hmap_destroy(&dns_map); >>>> +} >>>> + >>>> >>>> static void >>>> ovnnb_db_run(struct northd_context *ctx, struct ovsdb_idl_loop >>>> *sb_loop) >>>> @@ -5260,6 +5430,7 @@ ovnnb_db_run(struct northd_context *ctx, struct >>>> ovsdb_idl_loop *sb_loop) >>>> build_lflows(ctx, &datapaths, &ports); >>>> >>>> sync_address_sets(ctx); >>>> + sync_dns_entries(ctx, &ports); >>>> >>>> struct ovn_datapath *dp, *next_dp; >>>> HMAP_FOR_EACH_SAFE (dp, next_dp, key_node, &datapaths) { >>>> @@ -5657,6 +5828,10 @@ main(int argc, char *argv[]) >>>> add_column_noalert(ovnsb_idl_loop.idl, >>>> &sbrec_address_set_col_name); >>>> add_column_noalert(ovnsb_idl_loop.idl, >>>> &sbrec_address_set_col_addresses); >>>> >>>> + ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_dns); >>>> + add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dns_col_datapath); >>>> + add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dns_col_hostname); >>>> + >>>> ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_chassis); >>>> ovsdb_idl_add_column(ovnsb_idl_loop.idl, >>>> &sbrec_chassis_col_nb_cfg); >>>> >>>> diff --git a/ovn/ovn-nb.xml b/ovn/ovn-nb.xml >>>> index 88a6082..ccc978d 100644 >>>> --- a/ovn/ovn-nb.xml >>>> +++ b/ovn/ovn-nb.xml >>>> @@ -344,6 +344,23 @@ >>>> If set, indicates the maximum burst size for data sent from >>>> this >>>> interface, in bits. >>>> </column> >>>> + >>>> + <column name="options" key="hostname"> >>>> + If set, indicates the hostname associated with the logical >>>> port. >>>> + <code>OVN</code> supports a simple native internal DNS >>>> + resolution. Any DNS query for this host name from the VIFs >>>> belonging >>>> + to the same logical network would be resolved by >>>> + <code>OVN</code> to the IP addresses defined in the >>>> + <ref column="addresses"/> field. If no match is found, the >>>> DNS query >>>> + request is expected to be handled by an external DNS >>>> resolver. >>>> + </column> >>>> + >>>> + <column name="options" key="fqdn"> >>>> + If set, indicates the fqdn associated with the logical port. >>>> + Any DNS query for this fqdn would be resolved by >>>> + <code>ovn-controller</code> to the IP addresses defined in >>>> the >>>> + <ref column="addresses"/> field. >>>> + </column> >>>> </group> >>>> </group> >>>> >>>> @@ -1926,5 +1943,4 @@ >>>> <column name="external_ids"/> >>>> </group> >>>> </table> >>>> - >>>> </database> >>>> diff --git a/tests/ovn.at b/tests/ovn.at >>>> index 4b4beb0..f5f6885 100644 >>>> --- a/tests/ovn.at >>>> +++ b/tests/ovn.at >>>> @@ -6334,6 +6334,346 @@ OVS_APP_EXIT_AND_WAIT([ovsdb-server]) >>>> >>>> AT_CLEANUP >>>> >>>> +AT_SETUP([ovn -- dns lookup : 1 HV, 2 LS, 2 LSPs/LS]) >>>> +AT_SKIP_IF([test $HAVE_PYTHON = no]) >>>> +ovn_start >>>> + >>>> +ovn-nbctl ls-add ls1 >>>> + >>>> +ovn-nbctl lsp-add ls1 ls1-lp1 \ >>>> +-- lsp-set-addresses ls1-lp1 "f0:00:00:00:00:01 10.0.0.4 aef0::4" >>>> + >>>> +ovn-nbctl lsp-set-port-security ls1-lp1 "f0:00:00:00:00:01 10.0.0.4 >>>> aef0::4" >>>> + >>>> +ovn-nbctl lsp-add ls1 ls1-lp2 \ >>>> +-- lsp-set-addresses ls1-lp2 "f0:00:00:00:00:02 10.0.0.6 20.0.0.4" >>>> + >>>> +ovn-nbctl lsp-set-port-security ls1-lp2 "f0:00:00:00:00:02 10.0.0.6 >>>> 20.0.0.4" >>>> + >>>> +ovn-nbctl lsp-set-options ls1-lp1 hostname=vm1.ovn.org >>>> +ovn-nbctl lsp-set-options ls1-lp2 hostname=vm2.ovn.org >>>> + >>>> +net_add n1 >>>> +sim_add hv1 >>>> + >>>> +as hv1 >>>> +ovs-vsctl add-br br-phys >>>> +ovn_attach n1 br-phys 192.168.0.1 >>>> +ovs-vsctl -- add-port br-int hv1-vif1 -- \ >>>> + set interface hv1-vif1 external-ids:iface-id=ls1-lp1 \ >>>> + options:tx_pcap=hv1/vif1-tx.pcap \ >>>> + options:rxq_pcap=hv1/vif1-rx.pcap \ >>>> + ofport-request=1 >>>> + >>>> +ovs-vsctl -- add-port br-int hv1-vif2 -- \ >>>> + set interface hv1-vif2 external-ids:iface-id=ls1-lp2 \ >>>> + options:tx_pcap=hv1/vif2-tx.pcap \ >>>> + options:rxq_pcap=hv1/vif2-rx.pcap \ >>>> + ofport-request=2 >>>> + >>>> +ovn_populate_arp >>>> +sleep 2 >>>> +as hv1 ovs-vsctl show >>>> + >>>> +echo "*************************" >>>> +ovn-sbctl list DNS >>>> +echo "*************************" >>>> + >>>> +ip_to_hex() { >>>> + printf "%02x%02x%02x%02x" "$@" >>>> +} >>>> + >>>> +reset_pcap_file() { >>>> + local iface=$1 >>>> + local pcap_file=$2 >>>> + ovs-vsctl -- set Interface $iface options:tx_pcap=dummy-tx.pcap \ >>>> +options:rxq_pcap=dummy-rx.pcap >>>> + rm -f ${pcap_file}*.pcap >>>> + ovs-vsctl -- set Interface $iface options:tx_pcap=${pcap_file}-tx.pcap >>>> \ >>>> +options:rxq_pcap=${pcap_file}-rx.pcap >>>> +} >>>> + >>>> +# set_lsp_dns_params lsp_name >>>> +# Sets the dns_req_data and dns_resp_data >>>> +set_lsp_dns_params() { >>>> + local lsp_name=$1 >>>> + local ttl=00000e10 >>>> + an_count=0001 >>>> + type=0001 >>>> + case $lsp_name in >>>> + ls1-lp1) >>>> + # vm1.ovn.org >>>> + hostname=03766d31036f766e036f726700 >>>> + # IPv4 address - 10.0.0.4 >>>> + expected_dns_answer=${hostname}00010001${ttl}00040a000004 >>>> + ;; >>>> + ls1-lp2) >>>> + # vm2.ovn.org >>>> + hostname=03766d32036f766e036f726700 >>>> + # IPv4 address - 10.0.0.6 >>>> + expected_dns_answer=${hostname}00010001${ttl}00040a000006 >>>> + # IPv4 address - 20.0.0.4 >>>> + expected_dns_answer=${expected_dns_answer}${hostname}0001000 >>>> 1${ttl}000414000004 >>>> + an_count=0002 >>>> + ;; >>>> + ls1-lp1_ipv6_only) >>>> + # vm1.ovn.org >>>> + hostname=03766d31036f766e036f726700 >>>> + # IPv6 address - aef0::4 >>>> + type=001c >>>> + expected_dns_answer=${hostname}${type}0001${ttl}0010aef00000 >>>> 000000000000000000000004 >>>> + ;; >>>> + ls1-lp1_ipv4_v6) >>>> + # vm1.ovn.org >>>> + hostname=03766d31036f766e036f726700 >>>> + type=00ff >>>> + an_count=0002 >>>> + # IPv4 address - 10.0.0.4 >>>> + # IPv6 address - aef0::4 >>>> + expected_dns_answer=${hostname}00010001${ttl}00040a000004 >>>> + expected_dns_answer=${expected_dns_answer}${hostname}001c000 >>>> 1${ttl}0010 >>>> + expected_dns_answer=${expected_dns_answer}aef000000000000000 >>>> 00000000000004 >>>> + ;; >>>> + ls1-lp1_invalid_type) >>>> + # vm1.ovn.org >>>> + hostname=03766d31036f766e036f726700 >>>> + # IPv6 address - aef0::4 >>>> + type=0002 >>>> + ;; >>>> + ls1-lp1_incomplete) >>>> + # set type to none >>>> + type='' >>>> + esac >>>> + # TTL - 3600 >>>> + local dns_req_header=010201200001000000000000 >>>> + local dns_resp_header=010281200001${an_count}00000000 >>>> + dns_req_data=${dns_req_header}${hostname}${type}0001 >>>> + dns_resp_data=${dns_resp_header}${hostname}${type}0001${expe >>>> cted_dns_answer} >>>> +} >>>> + >>>> +# This shell function sends a DNS request packet >>>> +# test_dns INPORT SRC_MAC DST_MAC SRC_IP DST_IP DNS_QUERY EXPEC >>>> +test_dns() { >>>> + local inport=$1 src_mac=$2 dst_mac=$3 src_ip=$4 dst_ip=$5 >>>> dns_reply=$6 >>>> + local dns_query_data=$7 >>>> + shift; shift; shift; shift; shift; shift; shift; >>>> + # Packet size => IPv4 header (20) + UDP header (8) + >>>> + # DNS data (header + query) >>>> + ip_len=`expr 28 + ${#dns_query_data} / 2` >>>> + udp_len=`expr $ip_len - 20` >>>> + ip_len=$(printf "%x" $ip_len) >>>> + udp_len=$(printf "%x" $udp_len) >>>> + local request=${dst_mac}${src_mac}0800450000${ip_len}0000000080110 >>>> 000 >>>> + request=${request}${src_ip}${dst_ip}9234003500${udp_len}0000 >>>> + # dns data >>>> + request=${request}${dns_query_data} >>>> + >>>> + if test $dns_reply != 0; then >>>> + local dns_reply=$1 >>>> + ip_len=`expr 28 + ${#dns_reply} / 2` >>>> + udp_len=`expr $ip_len - 20` >>>> + ip_len=$(printf "%x" $ip_len) >>>> + udp_len=$(printf "%x" $udp_len) >>>> + local reply=${src_mac}${dst_mac}0800 >>>> 450000${ip_len}0000000080110000 >>>> + reply=${reply}${dst_ip}${src_ip}0035923400${udp_len}0000${dn >>>> s_reply} >>>> + echo $reply >> $inport.expected >>>> + else >>>> + for outport; do >>>> + echo $request >> $outport.expected >>>> + done >>>> + fi >>>> + as hv1 ovs-appctl netdev-dummy/receive hv1-vif$inport $request >>>> +} >>>> + >>>> +AT_CAPTURE_FILE([ofctl_monitor0.log]) >>>> +as hv1 ovs-ofctl monitor br-int resume --detach --no-chdir \ >>>> +--pidfile=ovs-ofctl0.pid 2> ofctl_monitor0.log >>>> + >>>> +set_lsp_dns_params ls1-lp2 >>>> +src_ip=`ip_to_hex 10 0 0 4` >>>> +dst_ip=`ip_to_hex 10 0 0 1` >>>> +dns_reply=1 >>>> +test_dns 1 f00000000001 f000000000f0 $src_ip $dst_ip $dns_reply >>>> $dns_req_data $dns_resp_data >>>> + >>>> +# NXT_RESUMEs should be 1. >>>> +OVS_WAIT_UNTIL([test 1 = `cat ofctl_monitor*.log | grep -c >>>> NXT_RESUME`]) >>>> + >>>> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif1-tx.pcap > >>>> 1.packets >>>> +cat 1.expected | cut -c -48 > expout >>>> +AT_CHECK([cat 1.packets | cut -c -48], [0], [expout]) >>>> +# Skipping the IPv4 checksum. >>>> +cat 1.expected | cut -c 53- > expout >>>> +AT_CHECK([cat 1.packets | cut -c 53-], [0], [expout]) >>>> + >>>> +reset_pcap_file hv1-vif1 hv1/vif1 >>>> +reset_pcap_file hv1-vif2 hv1/vif2 >>>> +rm -f 1.expected >>>> +rm -f 2.expected >>>> + >>>> +set_lsp_dns_params ls1-lp1 >>>> +src_ip=`ip_to_hex 10 0 0 6` >>>> +dst_ip=`ip_to_hex 10 0 0 1` >>>> +dns_reply=1 >>>> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply >>>> $dns_req_data $dns_resp_data >>>> + >>>> +# NXT_RESUMEs should be 2. >>>> +OVS_WAIT_UNTIL([test 2 = `cat ofctl_monitor*.log | grep -c >>>> NXT_RESUME`]) >>>> + >>>> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > >>>> 2.packets >>>> +cat 2.expected | cut -c -48 > expout >>>> +AT_CHECK([cat 2.packets | cut -c -48], [0], [expout]) >>>> +# Skipping the IPv4 checksum. >>>> +cat 2.expected | cut -c 53- > expout >>>> +AT_CHECK([cat 2.packets | cut -c 53-], [0], [expout]) >>>> + >>>> +reset_pcap_file hv1-vif1 hv1/vif1 >>>> +reset_pcap_file hv1-vif2 hv1/vif2 >>>> +rm -f 1.expected >>>> +rm -f 2.expected >>>> + >>>> +# Clear the hostname options for ls1-lp2 >>>> +ovn-nbctl lsp-set-options ls1-lp2 >>>> + >>>> +set_lsp_dns_params ls1-lp2 >>>> +src_ip=`ip_to_hex 10 0 0 4` >>>> +dst_ip=`ip_to_hex 10 0 0 1` >>>> +dns_reply=0 >>>> +test_dns 1 f00000000001 f00000000002 $src_ip $dst_ip $dns_reply >>>> $dns_req_data >>>> + >>>> +# NXT_RESUMEs should be 3. >>>> +OVS_WAIT_UNTIL([test 3 = `cat ofctl_monitor*.log | grep -c >>>> NXT_RESUME`]) >>>> + >>>> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif1-tx.pcap > >>>> 1.packets >>>> +AT_CHECK([cat 1.packets], [0], []) >>>> + >>>> +reset_pcap_file hv1-vif1 hv1/vif1 >>>> +reset_pcap_file hv1-vif2 hv1/vif2 >>>> +rm -f 1.expected >>>> +rm -f 2.expected >>>> + >>>> +# Clear the hostname for ls1-lp1 >>>> +# Since no ports of ls1 has hostname configued, >>>> +# ovn-northd should not add the DNS flows. >>>> +ovn-nbctl lsp-set-options ls1-lp1 >>>> +set_lsp_dns_params ls1-lp1 >>>> +src_ip=`ip_to_hex 10 0 0 6` >>>> +dst_ip=`ip_to_hex 10 0 0 1` >>>> +dns_reply=0 >>>> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply >>>> $dns_req_data >>>> + >>>> +# NXT_RESUMEs should be 3 only. >>>> +OVS_WAIT_UNTIL([test 3 = `cat ofctl_monitor*.log | grep -c >>>> NXT_RESUME`]) >>>> + >>>> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > >>>> 2.packets >>>> +AT_CHECK([cat 2.packets], [0], []) >>>> + >>>> +reset_pcap_file hv1-vif1 hv1/vif1 >>>> +reset_pcap_file hv1-vif2 hv1/vif2 >>>> +rm -f 1.expected >>>> +rm -f 2.expected >>>> + >>>> +# Test IPv6 (AAAA records) using IPv4 packet. >>>> +# Add back the DNS options for ls1-lp1. >>>> +ovn-nbctl lsp-set-options ls1-lp1 hostname=vm1.ovn.org >>>> + >>>> +set_lsp_dns_params ls1-lp1_ipv6_only >>>> +src_ip=`ip_to_hex 10 0 0 6` >>>> +dst_ip=`ip_to_hex 10 0 0 1` >>>> +dns_reply=1 >>>> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply >>>> $dns_req_data $dns_resp_data >>>> + >>>> +# NXT_RESUMEs should be 4. >>>> +OVS_WAIT_UNTIL([test 4 = `cat ofctl_monitor*.log | grep -c >>>> NXT_RESUME`]) >>>> + >>>> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > >>>> 2.packets >>>> +cat 2.expected | cut -c -48 > expout >>>> +AT_CHECK([cat 2.packets | cut -c -48], [0], [expout]) >>>> +# Skipping the IPv4 checksum. >>>> +cat 2.expected | cut -c 53- > expout >>>> +AT_CHECK([cat 2.packets | cut -c 53-], [0], [expout]) >>>> + >>>> +reset_pcap_file hv1-vif1 hv1/vif1 >>>> +reset_pcap_file hv1-vif2 hv1/vif2 >>>> +rm -f 1.expected >>>> +rm -f 2.expected >>>> + >>>> +# Test both IPv4 (A) and IPv6 (AAAA records) using IPv4 packet. >>>> +set_lsp_dns_params ls1-lp1_ipv4_v6 >>>> +src_ip=`ip_to_hex 10 0 0 6` >>>> +dst_ip=`ip_to_hex 10 0 0 1` >>>> +dns_reply=1 >>>> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply >>>> $dns_req_data $dns_resp_data >>>> + >>>> +# NXT_RESUMEs should be 5. >>>> +OVS_WAIT_UNTIL([test 5 = `cat ofctl_monitor*.log | grep -c >>>> NXT_RESUME`]) >>>> + >>>> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > >>>> 2.packets >>>> +cat 2.expected | cut -c -48 > expout >>>> +AT_CHECK([cat 2.packets | cut -c -48], [0], [expout]) >>>> +# Skipping the IPv4 checksum. >>>> +cat 2.expected | cut -c 53- > expout >>>> +AT_CHECK([cat 2.packets | cut -c 53-], [0], [expout]) >>>> + >>>> +reset_pcap_file hv1-vif1 hv1/vif1 >>>> +reset_pcap_file hv1-vif2 hv1/vif2 >>>> +rm -f 1.expected >>>> +rm -f 2.expected >>>> + >>>> +# Invalid type. >>>> +set_lsp_dns_params ls1-lp1_invalid_type >>>> +src_ip=`ip_to_hex 10 0 0 6` >>>> +dst_ip=`ip_to_hex 10 0 0 1` >>>> +dns_reply=0 >>>> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply >>>> $dns_req_data >>>> + >>>> +# NXT_RESUMEs should be 6. >>>> +OVS_WAIT_UNTIL([test 6 = `cat ofctl_monitor*.log | grep -c >>>> NXT_RESUME`]) >>>> + >>>> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > >>>> 2.packets >>>> +AT_CHECK([cat 2.packets], [0], []) >>>> + >>>> +reset_pcap_file hv1-vif1 hv1/vif1 >>>> +reset_pcap_file hv1-vif2 hv1/vif2 >>>> +rm -f 1.expected >>>> +rm -f 2.expected >>>> + >>>> +# Incomplete DNS packet. >>>> +set_lsp_dns_params ls1-lp1_incomplete >>>> +src_ip=`ip_to_hex 10 0 0 6` >>>> +dst_ip=`ip_to_hex 10 0 0 1` >>>> +dns_reply=0 >>>> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply >>>> $dns_req_data >>>> + >>>> +# NXT_RESUMEs should be 7. >>>> +OVS_WAIT_UNTIL([test 7 = `cat ofctl_monitor*.log | grep -c >>>> NXT_RESUME`]) >>>> + >>>> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > >>>> 2.packets >>>> +AT_CHECK([cat 2.packets], [0], []) >>>> + >>>> +reset_pcap_file hv1-vif1 hv1/vif1 >>>> +reset_pcap_file hv1-vif2 hv1/vif2 >>>> +rm -f 1.expected >>>> +rm -f 2.expected >>>> + >>>> +as hv1 >>>> +OVS_APP_EXIT_AND_WAIT([ovn-controller]) >>>> +OVS_APP_EXIT_AND_WAIT([ovs-vswitchd]) >>>> +OVS_APP_EXIT_AND_WAIT([ovsdb-server]) >>>> + >>>> +as ovn-sb >>>> +OVS_APP_EXIT_AND_WAIT([ovsdb-server]) >>>> + >>>> +as ovn-nb >>>> +OVS_APP_EXIT_AND_WAIT([ovsdb-server]) >>>> + >>>> +as northd >>>> +OVS_APP_EXIT_AND_WAIT([ovn-northd]) >>>> + >>>> +as main >>>> +OVS_APP_EXIT_AND_WAIT([ovs-vswitchd]) >>>> +OVS_APP_EXIT_AND_WAIT([ovsdb-server]) >>>> +AT_CLEANUP >>>> + >>>> AT_SETUP([ovn -- 1 LR with distributed router gateway port]) >>>> AT_SKIP_IF([test $HAVE_PYTHON = no]) >>>> ovn_start >>>> -- >>>> 2.9.3 >>>> >>>> _______________________________________________ >>>> dev mailing list >>>> [email protected] >>>> https://mail.openvswitch.org/mailman/listinfo/ovs-dev >>>> >>> >>> >> > _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
