network simulator support for Cisco Nexus 9k
Adds additional basic simulator support to stand up a virtual Cisco Nexus 9000 switch for testing in devstack to faciltate development and testing. Change-Id: Id66e6bcc646a6d35a2caa5ecbc6b8cd881adb7aa
This commit is contained in:
Julia Kreger
parent
803a969133
commit
e2fa72652d
@ -2635,6 +2635,12 @@ function configure_ngs_for_simulator {
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switch_pass="system_secret"
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enable_pass=""
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;;
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"cisco_nexus9k")
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switch_type="netmiko_cisco_nxos"
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trunk_port="ethernet1/1"
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switch_pass="system_s3cret!"
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enable_pass=""
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;;
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esac
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# NOTE(TheJulia) This is for a dell force10 switch, and it may need
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# to be broken up to be more in-line with per-type options.
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@ -2675,6 +2681,9 @@ function create_network_simulator_vm {
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force10_10)
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create_network_simulator_vm_force10_10 $2 $3
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;;
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cisco_nexus9k)
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create_network_simulator_vm_cisco_nexus $2 $3
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;;
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esac
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}
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@ -2846,6 +2855,95 @@ function create_network_simulator_vm_force10_9 {
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send_switch_config_line localhost 55001 "wri mem"
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}
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function create_network_simulator_vm_cisco_nexus {
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# Cisco's Nexus network switch simulator starts as a disk image,
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# however if there are failures, the saved state on the disk image can
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# be inconsistent state. As such, for sanity, we're going to copy the
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# disk image.
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# The TLDR how to use this, just download and set the variable below
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# to one of the images.
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local base_image=/opt/stack/nexus9300v64.10.3.7.M.qcow2
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local use_disk=/opt/stack/nexus_disk_image.qcow2
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local gns3_edk2_file=/opt/stack/OVMF-edk2-stable202305.fd
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# The disk image stores persistent state, so we need to replace it.
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cp $base_image $use_disk
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# This is specifically so we have what seems to be a switch friendly
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# edk2 firmware rom.
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wget https://sourceforge.net/projects/gns-3/files/Qemu%20Appliances/OVMF-edk2-stable202305.fd.zip/download -O $gns3_edk2_file.zip
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unzip $gns3_edk2_file.zip -d /opt/stack
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# For extra context:
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# * 8096 MB of RAM
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# * 2 vCPU
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# * UEFI mode/Q35 hardware.
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# * SATA for the disk.
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# * e1000 for each port
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# First port is mapped to mgmt0.
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# The VM will crash if the first interface is not present.
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local emu_cmd="$IRONIC_VM_EMULATOR -enable-kvm -machine q35 -smbios type=0,uefi=on -drive if=pflash,format=raw,readonly=on,file=$gns3_edk2_file -drive file=$use_disk,id=disk0,format=qcow2,if=none -device ahci,id=ahci -device ide-hd,drive=disk0,bus=ahci.0 -m 8096M -smp cpus=2 -display none -serial telnet:localhost:55001,server,nowait "
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# Base interfaces, attaches the trunk and the management interfaces.
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emu_cmd+=" -device e1000,netdev=net0 -netdev tap,id=net0,ifname=$1,script=no,downscript=no -device e1000,netdev=net1 -netdev tap,id=net1,ifname=$2,script=no,downscript=no,sndbuf=1048576"
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# Get a list of links, cut everything *after* "@" since taps duplicate
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# entries, limit to "sim-node" to match our nodes, and extract only
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# the actual interface name.
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local net_interface=2
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for i in $(ip link show up |cut -f1 -d "@" |grep "sim-node"|cut -f2 -d" "|cut -d":" -f1|sed s/sim/sw/g); do
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emu_cmd+=" -device e1000,netdev=net$net_interface -netdev tap,id=net$net_interface,ifname=$i,sndbuf=1048576"
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net_interface=$(( net_interface + 1))
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done
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run_process ir-sw-sim "$emu_cmd" "root" "root"
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# wait for the enable prompt
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# Connect to localhost on 55001, wait 120 seconds to start,
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# try 10 times, look for the "login prompt".
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# Because we must start from a clean state, it takes the switch about
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# 400-500 seconds to get into a deployed ready state.
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wait_for_switch_prompt localhost 55001 500 10 "Abort Power On Auto Provisioning" False
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sleep 2
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send_switch_config_line localhost 55001 "skip" # username
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# When you skip POAP, it is noted by the CLI that doing os
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# can take 5-15 minutes. In reality, this seems to only take
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# ~120 seconds on the virtual switch simulator.
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wait_for_switch_prompt localhost 55001 120 10 "login:" False
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sleep 1
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# Default credentials are "admin" and an empty password
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send_switch_config_line localhost 55001 "admin" # username
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sleep 1
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send_switch_config_line localhost 55001 "" # blank password
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sleep 4
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send_switch_config_line localhost 55001 "configure"
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sleep 1
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send_switch_config_line localhost 55001 "feature lldp"
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send_switch_config_line localhost 55001 "username admin password system_s3cret! role network-admin"
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send_switch_config_line localhost 55001 "int mgmt0"
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send_switch_config_line localhost 55001 "ip address 172.24.5.20/24"
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send_switch_config_line localhost 55001 "lldp transmit"
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send_switch_config_line localhost 55001 "exit"
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send_switch_config_line localhost 55001 "int ethernet1/1"
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send_switch_config_line localhost 55001 "switchport mode trunk"
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# Just allow *everything*, but not required.
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send_switch_config_line localhost 55001 "switchport trunk allowed vlan all"
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send_switch_config_line localhost 55001 "exit"
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# Interfaces in *order*
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# ethernet1/2 through 1/7
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for interface in 2 3 4 5 6 7 8 9; do
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send_switch_config_line localhost 55001 "int ethernet1/$interface"
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send_switch_config_line localhost 55001 "switchport mode access"
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send_switch_config_line localhost 55001 "lldp transmit"
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send_switch_config_line localhost 55001 "exit"
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done
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sleep 10
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send_switch_config_line localhost 55001 "exit"
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send_switch_config_line localhost 55001 "copy run start"
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} # End of Cisco Nexus 9k simulator setup
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function wait_for_switch_prompt {
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local host=$1
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local port=$2
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@ -2858,7 +2956,7 @@ function wait_for_switch_prompt {
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sleep $sleep_first
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local attempt=1
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if [[ -n "$use_enable" ]]; then
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if [[ -n "$use_enable" ]] && [[ "$use_enable" != "False" ]]; then
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use_enable="True"
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fi
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@ -3377,7 +3475,10 @@ function identify_port_for_switch {
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;; # end of force10_9
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force10_10)
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identify_force10_10_port $vm_port
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;;
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;;
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cisco_nexus9k)
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identify_cisco_nexus_port $vm_port
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;;
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esac
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}
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@ -3427,6 +3528,29 @@ function identify_force10_10_port {
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esac
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}
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function identify_cisco_nexus_port {
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case $1 in
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ovs-node-0i1)
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echo -n "ethernet1/2"
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;;
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ovs-node-0i2)
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echo -n "ethernet1/3"
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;;
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ovs-node-1i1)
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echo -n "ethernet1/4"
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;;
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ovs-node-1i2)
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echo -n "ethernet1/5"
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;;
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ovs-node-2i1)
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echo -n "ethernet1/6"
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;;
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ovs-node-2i2)
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echo -n "ethernet1/7"
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;;
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esac
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}
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function configure_iptables {
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# enable tftp natting for allowing connections to HOST_IP's tftp server
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@ -152,10 +152,21 @@ you should mentally model it as an appliance.
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Currently supported by the devstack plugin:
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* cisco_nexus9k - Cisco Nexus 9000 series virtual switch simulator. This
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requires access to Cisco's Nexus switch simulator downloads, which you
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must download, and place in /opt/stack on the host upon which you are
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executing devstack.
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* force10_9 - Dell Force10 OS9 based switches utilizing the OS9 simulator
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installation ISO image.
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installation ISO image. Devstack is able to download this file.
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* force10_10 - Dell Force10 OS10 (SmartFabric) switches utilizing a user
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downloaded switch simulator zip file.
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downloaded switch simulator zip file. The simulator package must be
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downloaded and extracted into /opt/stack for this to be leveraged.
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.. warning::
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The support for these switch simulators in the devstack plugin generally
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revolves around the use of versioned files and downloads. You will likely
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need to consult the devstack plugin source if you wish to leverage this
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functionality.
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The plugin generally work by attempting to plug the Virtual Machines used
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for CI testing through to networking for the virtual switch appliance, while
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