Open Stack

Hi,
I have more questions than ready answers.
If I understand well you have a single host all-in-one setup, am I right?

You mentioned flat network, for that please check this document to be sure
that you have everything set correctly:
https://docs.openstack.org/neutron/latest/admin/deploy-ovs-provider.html

Regards
Lajos Katona (lajoskatona)

韩光宇 <hanguangyu at uniontech.com> ezt írta (időpont: 2021. dec. 6., H, 17:19):

> Hi,
>
> I'm trying to create instance in OpenStack Victoria. But, I am facing a
> issues about dhcp of neutron.
>
> I have OpenStack Victoria running in one baremetl server with uniontech
> os(a downstream of centos 8). I have a Flat network created in the range of
> 10.12.21.190-10.12.21.195. I selected to have a DHCP. The instance ran,
> and neutron-dhcp-agent.service had allocated a IP to it.
> # openstack server list
> +--------------------------------------+-------+--------+-----------------------+----------------+--------+
> | ID | Name | Status | Networks | Image | Flavor |
> +--------------------------------------+-------+--------+-----------------------+----------------+--------+
> | 4ccae37e-fbfe-4acb-a109-e1bc9175c2e0 | inst1 | ACTIVE |
> provider=10.12.21.192 | centos8-server | h2 |
> +--------------------------------------+-------+--------+-----------------------+----------------+--------+
> But the instance can't get a response from DHCP.  No any error in log. And
> if I setup the ip manually in the instance I can get access to the gateway,
> dhcp port and external network.
>
> I can catpure the DHCP request in any network device in the server,
> include dhcp port(10.12.21.190). But no response.  Dnsmasq process was
> running and had
> # openstack port list
> +--------------------------------------+------+-------------------+-----------------------------------------------------------------------------+--------+
> | ID | Name | MAC Address | Fixed IP Addresses | Status |
> +--------------------------------------+------+-------------------+-----------------------------------------------------------------------------+--------+
> | 5ab32ca8-2d1d-47cf-9a62-7c01d21abaf0 | | fa:16:3e:1d:48:45 | ip_address=
> '10.12.21.192', subnet_id='3daf5a55-e76a-4093-8533-78d9464b1beb' | ACTIVE
> | | 63fb2306-7759-4933-8d93-590e3a56f315 | | fa:16:3e:c5:59:9a | ip_address=
> '10.12.21.190', subnet_id='3daf5a55-e76a-4093-8533-78d9464b1beb' | ACTIVE
> |
> +--------------------------------------+------+-------------------+-----------------------------------------------------------------------------+--------+
> # ip netns qdhcp-ec2c4d9d-888b-4312-b0af-ab2127b76e0e (id: 0) # sudo ip
> netns exec qdhcp-ec2c4d9d-888b-4312-b0af-ab2127b76e0e sudo tcpdump -n -S -i
> tap63fb2306-77|grep DHCP
> ## notes: *fa:16:3e:1d:48:45 is the mac of nic of inst1* ​
> dropped privs to tcpdump tcpdump: verbose output suppressed, use -v or -vv
> for full protocol decode listening on tap63fb2306-77, link-type EN10MB
> (Ethernet), capture size 262144 bytes 16:47:18.194028 IP 0.0.0.0.bootpc >
> 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:1d:48:45, length
> 276 16:47:21.146736 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP,
> Request from fa:16:3e:1d:48:45, length 276 16:47:25.226387 IP
> 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from
> fa:16:3e:1d:48:45, length 276
>
> more detail informations:
> # ps -ef|grep dnsmasq
> dnsmasq 7441 1 0 12月03 ? 00:00:00 dnsmasq --no-hosts --no-resolv
> --pid-file=/var/lib/neutron/dhcp/ec2c4d9d-888b-4312-b0af-ab2127b76e0e/pid
> --dhcp-hostsfile=/var/lib/neutron/dhcp/ec2c4d9d-888b-4312-b0af-ab2127b76e0e/host
> --addn-hosts=/var/lib/neutron/dhcp/ec2c4d9d-888b-4312-b0af-ab2127b76e0e/addn_hosts
> --dhcp-optsfile=/var/lib/neutron/dhcp/ec2c4d9d-888b-4312-b0af-ab2127b76e0e/opts
> --dhcp-leasefile=/var/lib/neutron/dhcp/ec2c4d9d-888b-4312-b0af-ab2127b76e0e/leases
> --dhcp-match=set:ipxe,175 --dhcp-userclass=set:ipxe6,iPXE --local-service
> --bind-dynamic
> --dhcp-range=set:subnet-3daf5a55-e76a-4093-8533-78d9464b1beb,10.12.21.0,static,255.255.255.0,86400s
> --dhcp-option-force=option:mtu,1500 --dhcp-lease-max=256 --conf-file=
> --domain=openstacklocal
> dnsmasq 317868 1 0 14:33 ? 00:00:00 /usr/sbin/dnsmasq
> --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro
> --dhcp-script=/usr/libexec/libvirt_leaseshelper
> root 317869 317868 0 14:33 ? 00:00:00 /usr/sbin/dnsmasq
> --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro
> --dhcp-script=/usr/libexec/libvirt_leaseshelper
> root 340315 317310 0 18:43 pts/2 00:00:00 grep --color=auto dnsmasq
> [root at a16 ~]# cat
> /var/lib/neutron/dhcp/ec2c4d9d-888b-4312-b0af-ab2127b76e0e/host
> fa:16:3e:c5:59:9a,host-10-12-21-190.openstacklocal,10.12.21.190
> fa:16:3e:1d:48:45,host-10-12-21-192.openstacklocal,10.12.21.192
> # ovs-vsctl show adbd4b0c-cb78-4b8f-b8a6-197c5948312c Manager
> "ptcp:6640:127.0.0.1" is_connected: true Bridge br0 Controller "tcp:
> 127.0.0.1:6633" is_connected: true fail_mode: secure datapath_type:
> system Port enp5s0 Interface enp5s0 Port phy-br0 Interface phy-br0 type:
> patch options: {peer=int-br0} Port br0 Interface br0 type: internal
> Bridge br-tun Controller "tcp:127.0.0.1:6633" is_connected: true
> fail_mode: secure datapath_type: system Port br-tun Interface br-tun type:
> internal Port patch-int Interface patch-int type: patch options:
> {peer=patch-tun} Bridge br-int Controller "tcp:127.0.0.1:6633"
> is_connected: true fail_mode: secure datapath_type: system Port int-br0
> Interface int-br0 type: patch options: {peer=phy-br0} Port br-int
> Interface br-int type: internal Port tap63fb2306-77 tag: 1 Interface
> tap63fb2306-77 type: internal Port patch-tun Interface patch-tun type:
> patch options: {peer=patch-int} Port qvo5ab32ca8-2d tag: 1 Interface
> qvo5ab32ca8-2d ovs_version: "2.13.0". # ip a 1: lo:
> <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
> qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet
> 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6
> ::1/128 scope host valid_lft forever preferred_lft forever 2: enp5s0:
> <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master ovs-system
> state UP group default qlen 1000 link/ether 1c:69:7a:92:be:30 brd
> ff:ff:ff:ff:ff:ff 3: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
> state DOWN group default qlen 1000 link/ether ea:f5:ce:24:93:12 brd
> ff:ff:ff:ff:ff:ff 4: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
> noqueue state UNKNOWN group default qlen 1000 link/ether 1c:69:7a:92:be:30
> brd ff:ff:ff:ff:ff:ff inet 10.12.21.142/24 scope global br0 valid_lft
> forever preferred_lft forever inet6 fe80::1e69:7aff:fe92:be30/64 scope link
> valid_lft forever preferred_lft forever 5: br-int:
> <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
> group default qlen 1000 link/ether ba:5d:16:cf:89:40 brd ff:ff:ff:ff:ff:ff
> inet6 fe80::b85d:16ff:fecf:8940/64 scope link valid_lft forever
> preferred_lft forever 9: br-tun: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
> state DOWN group default qlen 1000 link/ether 86:bb:24:69:7e:43 brd
> ff:ff:ff:ff:ff:ff 11: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500
> qdisc noqueue state DOWN group default qlen 1000 link/ether
> 52:54:00:4d:96:e4 brd ff:ff:ff:ff:ff:ff inet 192.168.122.1/24 brd
> 192.168.122.255 scope global virbr0 valid_lft forever preferred_lft forever
> 12: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0
> state DOWN group default qlen 1000 link/ether 52:54:00:4d:96:e4 brd
> ff:ff:ff:ff:ff:ff 13: qbr5ab32ca8-2d: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu
> 1500 qdisc noqueue state UP group default qlen 1000 link/ether
> 76:0e:be:40:a6:ee brd ff:ff:ff:ff:ff:ff 14: qvo5ab32ca8-2d at qvb5ab32ca8-2d:
> <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master ovs-system
> state UP group default qlen 1000 link/ether 12:90:d5:07:2a:a2 brd
> ff:ff:ff:ff:ff:ff inet6 fe80::1090:d5ff:fe07:2aa2/64 scope link valid_lft
> forever preferred_lft forever 15: qvb5ab32ca8-2d at qvo5ab32ca8-2d:
> <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master
> qbr5ab32ca8-2d state UP group default qlen 1000 link/ether
> 76:0e:be:40:a6:ee brd ff:ff:ff:ff:ff:ff inet6 fe80::740e:beff:fe40:a6ee/64
> scope link valid_lft forever preferred_lft forever 16: tap5ab32ca8-2d:
> <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master
> qbr5ab32ca8-2d state UNKNOWN group default qlen 1000 link/ether
> fe:16:3e:1d:48:45 brd ff:ff:ff:ff:ff:ff inet6 fe80::fc16:3eff:fe1d:4845/64
> scope link valid_lft forever preferred_lft forever # cat
> /etc/neutron/plugins/ml2/openvswitch_agent.ini [ovs] local_ip =
> 10.12.21.142 datapath_type = system bridge_mappings = provider:br0 [vxlan]
> enable_vxlan = true local_ip = 10.12.21.142 l2_population = true
> prevent_arp_spoofing = True [securitygroup] enable_security_group = True
> firewall_driver =
> neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver #
> cat /etc/neutron/dhcp_agent.ini [DEFAULT] interface_driver =
> neutron.agent.linux.interface.OVSInterfaceDriver dhcp_driver =
> neutron.agent.linux.dhcp.Dnsmasq enable_isolated_metadata = true
>
> I would very very appreciate any kind of guidance or help.
>
> Thanks,
> Han Guangyu
>
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