Ultra-M:從OSPD對調配IP地址分配進行故障排除和監控

簡介

本文說明如何監控和疑難排解OpenStack平台導向器(OSPD)到Ultra-M中的openstack計算節點的IP位址分配。

必要條件

需求

思科建議您瞭解以下主題：

• StarOs
• Ultra-M基本體系結構

採用元件

本文檔中的資訊基於Ultra 5.1.x版本。 

本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。

背景資訊

對於現有的Ultra-M解決方案，使用了Cisco UCS-C伺服器。

在Ultra-M安裝過程中，OSPD將IP地址分配給計算節點調配介面。

此介面用於預引導執行環境（在內檢階段）。

縮寫

本文使用這些縮寫

VNF	虛擬網路功能
OSPD	Openstack平台導向器
DHCP	動態主機設定通訊協定
CIMC	思科整合式管理控制器
IPMI	智慧平台管理介面
PXE	預引導執行環境
UCS	思科的整合運算系統

問題

在思科的Ultra-M解決方案中，在雲下安裝過程中，OSPD會將IP地址分配給計算節點調配介面。 此介面用於PXE啟動（在內檢階段）。 如果此介面無法訪問或未正確分配IP地址，則內省會失敗，並且整體雲下安裝也會失敗。

解決方案

如果UCS在等待來自DHCP伺服器的DHCP提供時停滯在啟動狀態，請按照以下步驟進行故障排除。

步驟1.確定UCS連線在哪個Catalyst埠上，並驗證埠是否啟動且正在運行（show int gig x/x/x ->檢查是否為UP）。

步驟2.運行內檢時，檢查交換機上的arp條目是否正確以及資料包數量是否增加。

show int gig x/x/x | grep packet -> verify that the input/output packet increase (that means UCS is sending and receiving packets). 

步驟3.如果步驟2的輸出正常，請檢查OSPD上的配置。該池在undercloud.conf中為基於5.1的版本配置。

dhcp_start = 192.x.y.101
dhcp_end = 192.x.y.150 

自6.0版本起，dhcp配置是vim-orch配置檔案的一部分。

provisioning-network dhcp-ip-range start 192.x.y.101
provisioning-network dhcp-ip-range end 192.x.y.150
provisioning-network inspection-ip-range start 192.x.y.201
provisioning-network inspection-ip-range end 192.x.y.250

步驟4.現在，如果發生任何故障，您可以在/var/log/messages中進一步檢查。

例如，如果是，您可能會看到如下內容：

"Dec 20 13:33:51 dnucs001-ospd dnsmasq-dhcp[5632]: DHCPDISCOVER(tap96912f54-41) 38:0e:4d:9c:ba:36 no address available"

這意味著OSPD無法將IP分配到UCS（並且內省過程無法完成）。 

請注意，OSPD將DHCPDISCOVER視為第一條消息。如果在跟蹤中看到只收到BOOTP，則OSPD不會進一步分配地址。如果UCS伺服器和OSPD（非標準UltraM設計）之間存在路由器，並且面向UCS伺服器的介面上未配置IP helper-address OSPD-IP。

C3750#show run inter vlan x
Building configuration...

Current configuration : 140 bytes
!
interface Vlan3
 description CIMC/IPMI & OC External/VirtIO subnets
 ip address 192.x.y.254 255.255.0.0
 ip helper-address 192.x.y.1 <<<<<<<<<<< ADD THIS ONE POINTING AT OSPD's IP ADDRESS IN PROV/DHCP VLAN/SUBNET
end

步驟5.現在，進一步檢查dhcp進程是否完全正常運行且正在運行，以及是否有實際可用的IP。

(請注意RH錯誤：1301659)

[stack@bru-ospd-ultram-1 ~]$ systemctl list-units | grep dns  openstack-ironic-inspector-dnsmasq.service                                                                              loaded active running   PXE boot dnsmasq service for Ironic Inspector

詳細資訊 — 檢視分配給特定MAC的實際IP地址：

[stack@bru-ospd-ultram-1 ~]$ sudo systemctl status openstack-ironic-inspector-dnsmasq.service
● openstack-ironic-inspector-dnsmasq.service - PXE boot dnsmasq service for Ironic Inspector
 Loaded: loaded (/usr/lib/systemd/system/openstack-ironic-inspector-dnsmasq.service; enabled; vendor preset: disabled)
 Active: active (running) since Thu 2017-12-14 13:43:08 CET; 6 days ago
 Process: 17511 ExecStart=/sbin/dnsmasq --conf-file=/etc/ironic-inspector/dnsmasq.conf (code=exited, status=0/SUCCESS)
 Main PID: 17513 (dnsmasq)
 CGroup: /system.slice/openstack-ironic-inspector-dnsmasq.service
 └─17513 /sbin/dnsmasq --conf-file=/etc/ironic-inspector/dnsmasq.conf

Dec 14 15:31:53 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPREQUEST(br-ctlplane) 192.x.y.207 38:0e:4d:9c:97:c2
Dec 14 15:31:53 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPACK(br-ctlplane) 192.x.y.207 38:0e:4d:9c:97:c2
Dec 14 15:32:02 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPREQUEST(br-ctlplane) 192.x.y.206 38:0e:4d:9c:a4:46
Dec 14 15:32:02 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPACK(br-ctlplane) 192.x.y.206 38:0e:4d:9c:a4:46
Dec 14 15:32:17 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPREQUEST(br-ctlplane) 192.x.y.209 38:0e:4d:9c:9c:42
Dec 14 15:32:17 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPACK(br-ctlplane) 192.x.y.209 38:0e:4d:9c:9c:42
Dec 14 15:32:34 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPREQUEST(br-ctlplane) 192.x.y.208 38:0e:4d:9c:a3:6e
Dec 14 15:32:34 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPACK(br-ctlplane) 192.x.y.208 38:0e:4d:9c:a3:6e
Dec 14 15:32:39 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPREQUEST(br-ctlplane) 192.x.y.207 38:0e:4d:9c:97:c2
Dec 14 15:32:39 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPACK(br-ctlplane) 192.x.y.207 38:0e:4d:9c:97:c2

使用也可看到不同格式的相同輸出 sudo journalctl -u openstack-ironic-inspector-dnsmasq。

(根據RH文檔：診斷導向器問題)

[stack@bru-ospd-ultram-1 ~]$ sudo journalctl -u openstack-ironic-inspector-dnsmasq
-- Logs begin at Mon 2017-12-04 10:26:05 CET, end at Thu 2017-12-21 10:30:36 CET. --
Dec 12 18:02:19 bru-ospd-ultram-1.cisco.com systemd[1]: Starting PXE boot dnsmasq service for Ironic Inspector...
Dec 12 18:02:19 bru-ospd-ultram-1.cisco.com dnsmasq[1105]: dnsmasq: unknown interface br-ctlplane
Dec 12 18:02:19 bru-ospd-ultram-1.cisco.com systemd[1]: openstack-ironic-inspector-dnsmasq.service: control process exited, code=
Dec 12 18:02:19 bru-ospd-ultram-1.cisco.com systemd[1]: Failed to start PXE boot dnsmasq service for Ironic Inspector.
Dec 12 18:02:19 bru-ospd-ultram-1.cisco.com systemd[1]: Unit openstack-ironic-inspector-dnsmasq.service entered failed state.
Dec 12 18:02:19 bru-ospd-ultram-1.cisco.com systemd[1]: openstack-ironic-inspector-dnsmasq.service failed.
-- Reboot --
Dec 13 17:56:31 bru-ospd-ultram-1.cisco.com systemd[1]: Starting PXE boot dnsmasq service for Ironic Inspector...
Dec 13 17:56:31 bru-ospd-ultram-1.cisco.com dnsmasq[1108]: dnsmasq: unknown interface br-ctlplane
Dec 13 17:56:31 bru-ospd-ultram-1.cisco.com systemd[1]: openstack-ironic-inspector-dnsmasq.service: control process exited, code=
Dec 13 17:56:31 bru-ospd-ultram-1.cisco.com systemd[1]: Failed to start PXE boot dnsmasq service for Ironic Inspector.
Dec 13 17:56:31 bru-ospd-ultram-1.cisco.com systemd[1]: Unit openstack-ironic-inspector-dnsmasq.service entered failed state.
Dec 13 17:56:31 bru-ospd-ultram-1.cisco.com systemd[1]: openstack-ironic-inspector-dnsmasq.service failed.
Dec 14 13:43:08 bru-ospd-ultram-1.cisco.com systemd[1]: Starting PXE boot dnsmasq service for Ironic Inspector...
Dec 14 13:43:08 bru-ospd-ultram-1.cisco.com dnsmasq[17513]: started, version 2.66 DNS disabled
Dec 14 13:43:08 bru-ospd-ultram-1.cisco.com dnsmasq[17513]: compile time options: IPv6 GNU-getopt DBus no-i18n IDN DHCP DHCPv6 no
Dec 14 13:43:08 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCP, IP range 192.x.y.201 -- 192.x.y.250, lease time 2m
Dec 14 13:43:08 bru-ospd-ultram-1.cisco.com systemd[1]: Started PXE boot dnsmasq service for Ironic Inspector.
Dec 14 15:26:56 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPDISCOVER(br-ctlplane) 84:3d:c6:99:2e:de
Dec 14 15:26:56 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPOFFER(br-ctlplane) 192.x.y.201 84:3d:c6:99:2e:de
Dec 14 15:26:59 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPDISCOVER(br-ctlplane) 84:3d:c6:98:d3:78
Dec 14 15:26:59 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPOFFER(br-ctlplane) 192.x.y.202 84:3d:c6:98:d3:78
Dec 14 15:26:59 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPREQUEST(br-ctlplane) 192.x.y.201 84:3d:c6:99:2e:de
Dec 14 15:26:59 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPACK(br-ctlplane) 192.x.y.201 84:3d:c6:99:2e:de
Dec 14 15:27:02 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPDISCOVER(br-ctlplane) 84:3d:c6:10:25:92
Dec 14 15:27:02 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPOFFER(br-ctlplane) 192.x.y.203 84:3d:c6:10:25:92
Dec 14 15:27:02 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPREQUEST(br-ctlplane) 192.x.y.202 84:3d:c6:98:d3:78
Dec 14 15:27:02 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPACK(br-ctlplane) 192.x.y.202 84:3d:c6:98:d3:78
Dec 14 15:27:02 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPREQUEST(br-ctlplane) 192.x.y.203 84:3d:c6:10:25:92
Dec 14 15:27:02 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPACK(br-ctlplane) 192.x.y.203 84:3d:c6:10:25:92
Dec 14 15:27:06 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPDISCOVER(br-ctlplane) 84:3d:c6:98:cd:24
Dec 14 15:27:06 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPOFFER(br-ctlplane) 192.x.y.204 84:3d:c6:98:cd:24
Dec 14 15:27:09 bru-ospd-ultram-1.cisco.com dnsmasq-dhcp[17513]: DHCPDISCOVER(br-ctlplane) 84:3d:c6:98:d0:f0
[stack@bru-ospd-ultram-1 ~]$