Lagopus Day #2 YokohamaのLTで発表した資料です。

1. Lagopus+PCAP PMD
Sep 27, 2014
Masaru OKI
@masaru0714
m-oki@stratosphere.co.jp

2. Lagopus
● 䜸䞊䝥䞁䝋䞊䝇䛾OpenFlow䝇䜲䝑䝏ᐇ⿦
● Linux䛷ື䛟 (௒ᅇ䛿Ubuntu14.04LTS䜢౑⏝)
● Intel DPDK䜢㊊ᅇ䜚䛻౑䛳䛶䛔䜛
● ௒ᅇ䛿DPDK䛾≉ᚩ䛷䛒䜛PMD䜢฼⏝䛩䜛
● ᑐ㇟DPDK䛿1.7.0
○ ྂ䛔䝞䞊䝆䝵䞁䛷䛿ᣦᐃ᪉ἲ䛺䛹㐪䛳䛶䛔䜛䛾䛷ὀព

3. PMD
● Poll Mode Driver
○ ㏻ᖖLAN䛾䝗䝷䜲䝞䛿䜹䞊䝛䝹䛜ᣢ䛳䛶䛔䜛
○ DPDK䛷䛿䛣䜜䜢䜰䝥䝸䜿䞊䝅䝵䞁ഃ䛷ᐇ⾜䛩䜛
○ 䛭䛾㝿䛻๭䜚㎸䜏㥑ື䛫䛪䚸䝫䞊䝸䞁䜾䛩䜛
● ㏻ᖖPMD䛿≀⌮NIC䛾䝏䝑䝥ẖ䛻⏝ព䛥䜜䜛
○ DPDK䛜NIC䛾✀㢮䛻ᛂ䛨䛶౑䛖PMD䜢⮬ື㑅ᢥ
● ≉Ṧ䛺PMD䛜䛔䛟䛴䛛⏝ព䛥䜜䛶䛔䜛
○ ௒ᅇ䛿䛭䛾䛺䛛䛾୍䛴䛷䛒䜛PCAP PMD䜢౑䛖
○ ௚䛻䛿bonding PMD, ring PMD䛜䛒䜛

4. PCAP PMD
● ㏻ᖖ䛾NIC⏝PMD
○ eth0䛺䛹䛾i/f䜢㏻ᖖ䛾䜹䞊䝛䝹⟶⌮䛛䜙እ䛧䛶䚸DPDK
ᑓ⏝䛾uio䝗䝷䜲䝞䛻ᕪ䛧᭰䛘䛶౑䛖
○ 䛱䜗䛳䜁䜔(ᛶ⬟䝏䝳䞊䝙䞁䜾䛥䜜䜎䛟䛳䛶䜛)
● PCAP PMD
○ eth0䛺䛹䜢䜹䞊䝛䝹⟶⌮䛾䜎䜎䚸libpcap䜢౑䛖䛣䛸䛷
PF_PACKET䜔BPF䛺䛹䜢⏝䛔䛶㏻ಙ䛩䜛PMD
○ ㏿ᗘ䛿ᮇᚅ䛷䛝䛺䛔௦䜟䜚䛻ᛂ⏝⠊ᅖ䛜ᗈ䛔

5. ⤮䛻䛩䜛䛸䛣䛖
䈜䛚䛚䜎䛛䛺䜲䝯䞊䝆䛷䛩
application
eth0
packets
DPDK application
DPDK igb PMD
eth0
igb_uio
packets
DPDK application
DPDK pcap PMD
eth0
packets
userland
kernel, driver
通常(DPDK未使用) DPDK+物理NIC DPDK+PCAP PMD

6. PCAP PMD䛾౑䛔᪉
app -c7 -n2 --vdev eth_pcap0,iface=eth0 ...
● --vdev PMDྡ,䝟䝷䝯䞊䝍[, …]
○ --vdev䛿」ᩘ᭩䛡䜛 (eth_pcap1, …)
● I/F䛾୪䜃䛸䛧䛶䚸≀⌮NIC䛾๓䛻ᤄධ䛥䜜䜛
○ lagopus䛷ᣦᐃ䛩䜛䛸
PortID0=pcap0, PortID1=≀⌮NIC1ᮏ┠,
䛸䛺䜛䚹(lagopus.conf䛷䛿PortID0䜢eth0䛸⾲⌧䛩䜛)
○ 䝕䝣䜷䝹䝖䛷䛿OpenFlow Port1=PortID0

7. ືసᐇ㦂ᴫせ
● Host-DUT㛫䛷tunnel䜢3ᮏᙇ䜛(௒ᅇ䛿VXLAN)
○ L2encap䛩䜛tunnel I/F䛺䜙ูprotocol䛷䜒䛷䛝䜛䛿䛪
● LagopusどⅬ䛷3ᮏ㊊䛻䛧䚸Ryu䝔䝇䝖䜢ᐇ⾜
○ Host, DUT䛸䜒䛻PCAP PMD䜢౑䛖Lagopus
● ≀⌮⥺䛿1ᮏ䛷ᵓ⠏䛷䛝䜛
DUT
target sw
Host
tester sw
VXLAN VNI=0 (portid0)
VXLAN VNI=1 (portid1)
VXLAN VNI=2 (portid2)

8. ᐇ㦂๓䛻䚸䝝䝬䜚䛭䛖䛺䛸䛣䜝䛾☜ㄆ
● ᐇ䛿䚸PCAP PMD䛻䛿䝞䜾䛜䛒䜛
○ ᑡ䛺䛟䛸䜒1.7.0䜎䛷䛾DPDK䛷䛿䚸PCAP PMDཷಙ䝟䜿䝑
䝖䝕䞊䝍䛾୰䛾ཷಙ䝫䞊䝖␒ྕ䛾್䛜䛩䜉䛶0xff䛻䛺䜛
○ ⌧ᅾ䛾Lagopus䛿䛣䛾᝟ሗ䜢ཧ↷䛧䛶䛔䜛
○ PCAP PMD䛾䝁䞊䝗䜢ಟṇ䛩䜛ᚲせ䛜䛒䜛(3⾜㏣ຍ)
● VXLAN䜢up䛧䛯䜙IPv6䛾DAD➼䜢䛧䜓䜉䜛䛛䜒
○ v6䛜ὶ䜜䜛䛸Ryu䛾䝟䜿䝑䝖䛻⣮䜜䛶䝔䝇䝖䛜fail䛩䜛
○ →Ubuntu䛷䜔䛳䛶䜏䛯䜙䚸䛧䜓䜉䜙䛺䛔ᶍᵝ䚹
○ 䜘䛛䛳䛯䖪

9. PCAP PMD䜢౑⏝䛩䜛‽ഛ
● PCAP PMD䛿ᶆ‽䛷䝡䝹䝗䛥䜜䛶䛔䛺䛔
○ DPDK䛾config䜢⦅㞟䛧䛶䝡䝹䝗䛧䛶䛚䛟
■ RTE_SDK=$HOME/src/dpdk䛾䛸
䛝䚸$RTE_SDK/config/common_linuxapp䜢⦅㞟
■ ୗグ䛾⾜䛜=n䛸䛺䛳䛶䛔䜛䛾䛷䚸=y䛻ኚ᭦
■ CONFIG_RTE_LIBRTE_PMD_PCAP=y
○ ಟṇ䜢ᛀ䜜䛪䛻
● DPDK䝡䝹䝗ᚋ䚸Lagopus䜢䝡䝹䝗

10. VXLAN I/F䛾సᡂ䚸タᐃ
● 䛔䜝䛔䜝䝃䝪䛳䛶䛔䜛䛸䛣䜝䛿Ẽ䛻䛧䛺䛔
● ྂ䛔䛸䝃䝫䞊䝖䛥䜜䛶䛺䛔䛾䛷ὀព
ip link add vxlan0 type vxlan id 0
ip link add vxlan1 type vxlan id 1
ip link add vxlan2 type vxlan id 2
ip link set up vxlan0
ip link set up vxlan1
ip link set up vxlan2

11. Ryu䝔䝇䝖䜰䝥䝸䛾㉳ື
● ᐇ⾜䝩䝇䝖䛿䛹䛱䜙䛷䜒䛔䛔
○ lagopus.conf䛾controllerᣦᐃ䜢ྜ䜟䛫䜛
● 䛒䜙䛛䛨䜑ryu䜢git clone䛧䛶䛒䜜䜀
cd src/ryu
ryu-manager tester.py
● pip䛷䜲䞁䝇䝖䞊䝹䛧䛯ሙྜ䛿/usr/local/lib/䛾
ୗ䛒䛯䜚䛻tester.py䜔䝔䝇䝖䜿䞊䝇䛜ධ䛳䛶䛔䜛
䛾䛷䚸䛭䛣䛻cd䛧䛶ᐇ⾜䛩䜛䛛䚸䝟䝇䜢୚䛘䜛

12. Lagopus䛾㉳ື
● 4䝁䜰ᣦᐃ䛷㉳ື䛾ሙྜ
sudo lagopus -d -- -cf -n2 --vdev eth_pcap0,
iface=vxlan0 --vdev eth_pcap1,iface=vxlan1 --vdev
eth_pcap2,iface=vxlan2 -- -p7
● ධຊ᫬䛿1⾜䛷
● lagopus.conf䛿␎
● ཮᪉䝩䝇䝖䛷㉳ື䛧Ryu䛸䛴䛺䛜䜛䛸䝔䝇䝖㛤ጞ
● group,meter㎸䜏䛰䛸䝔䝇䝖᏶஢䜎䛷⣙30ศ

13. ᐇ⾜⤖ᯝ
ᮏ᪥䛾ᐇ㦂……ኻᩋ
● ✺㈏సᴗ䛩䛞䛯(᫖ᬌᛮ䛔䛴䛔䛶ጞ䜑䛯)
● Fedora20-Ubuntu14.04LTS䛷䛴䛺䛤䛖䛸䛧䛯
● VXLANタᐃ⮬యึ䜑䛶
● Port␒ྕ䛜ྜ䛳䛶䛔䛺䛔␲ᝨ䚸ㄪᰝ᫬㛫ษ䜜
● Ubuntuධ䜜䜘䛖䛸䛧䛶Fedora partitionቯ䛩
● 䛒䜟䛶䜛䛸䜝䛟䛺䛣䛸䛜䛺䛔䚸సᴗ䛿ィ⏬ⓗ䛻