Exersize Neutron networks, routers, dhcp, metadata, and dns.

neutron-exersize.sh

#!/usr/bin/env bash

set -e

EXTNET="${EXTNET:-EXNET}"
FLAVOR="512"
IMAGE="cirros"
OPENRC="${OPENRC:-/root/openrc}"
STOP_ON_FAILURE="${STOP_ON_FAILURE:-}"
 
cat >user-data.tmp <<EOF
#!/bin/sh
set -e
ping -c 3 8.8.8.8
ping -c 3 opendns.com
echo "it works!"
EOF

trap my_trap_handler ERR

function my_trap_handler() {
    destroy
}

function warn() {
    echo -e "\e[0;35m${@}\e[0m"
}

function info() {
    echo -e "\e[0;33m${@}\e[0m"
}

function failure() {
    echo -e "\e[0;31m${@}\e[0m"
}

function success() {
    echo -e "\e[0;32m${@}\e[0m"
}

function destroy() {
    nova_delete_wait
    if [[ $STOP_ON_FAILURE ]]; then
        exit 1
    else
        warn "$(neutron router-gateway-clear ${ROUTER_ID})"
        warn "$(neutron router-interface-delete ${ROUTER_ID} ${SUBNET_ID})"
        warn "$(neutron subnet-delete ${SUBNET_ID})"
        warn "$(neutron router-delete ${ROUTER_ID})"
        warn "$(neutron net-delete ${NET_ID})"
    fi
}

function nova_delete_wait() {
    warn "$(nova delete ${NOVA_ID})"
    if ! timeout 60 sh -c "while nova list | grep ${NOVA_ID} | grep ACTIVE; do sleep 1; done"; then
        return 1
    else
        return 0
    fi
}

function nova_boot_wait() {
    info "Creating Instance"
    FLAVOR_ID="$(nova flavor-list | grep -w ${FLAVOR} | head -n 1 | awk '{print $2}')"
    IMAGE_ID="$(nova image-list | grep -w ${IMAGE} | head -n 1 | awk '{print $2}')"
    NOVA_ID="$(nova boot --flavor "${FLAVOR_ID}" --image "${IMAGE_ID}" --user-data user-data.tmp --nic net-id=$NET_ID $PREFIX-instance | grep -w id | awk '{print $4}')"
    if ! timeout 60 sh -c "while ! nova list | grep ${NOVA_ID} | grep ACTIVE; do sleep 1; done"; then
        failure "Instance ${NOVA_ID} failed to go active after 60 seconds"
        return 1
    else
        HOST=$(nova show ${NOVA_ID} | grep ATTR:host | grep -Po [0-9]+-compute[0-9]+)
        info "Instance Created. Compute Node: $HOST, Network Agent: $NET_HOST"
        return 0
    fi
}

function nova_console() {
    if ! timeout 30 sh -c "while ! nova console-log ${NOVA_ID} | grep 'it works'; do sleep 1; done"; then
        failure "Instance failed to ping the outside world."

        info "Router Port Information"
        failure "$(neutron router-port-list ${ROUTER_ID})"

        info "Router and L3 agent Information"
        failure "$(neutron l3-agent-list-hosting-router ${ROUTER_ID})"

        info "Port information"
        for i in $(neutron port-list | grep -w "${SUBNET_ID}" | awk '{print $2}'); do 
            failure "$(neutron port-show $i)"
        done
        return 1
    else
        success "Test succeeded on node $HOST:$NET_HOST."
        destroy
        return 0
    fi
}

if [ ! -f "${OPENRC}" ];then
    failure "No OpenRC File found"
    exit 1
else
    source "${OPENRC}"
fi

for count in {1..10}; do
    PREFIX="NeutronExercise"
    NET_ID="$(neutron net-create ${PREFIX}-net | grep -w id | awk '{print $4}')"
    info "Network created. ID: ${NET_ID}"

    SUBNET_ID=$(neutron subnet-create --name ${PREFIX}-subnet --dns-nameserver 8.8.8.8 ${NET_ID} 10.10.10.0/24 | grep -w id | awk '{print $4}')
    info "Subnet created. ID: ${SUBNET_ID}"

    ROUTER_ID="$(neutron router-create ${PREFIX}-router | grep -w id | awk '{print $4}')"
    info "Router created. ID: ${ROUTER_ID}"

    info "$(neutron router-gateway-set ${ROUTER_ID} ${EXTNET})"
    info "$(neutron router-interface-add ${ROUTER_ID} ${SUBNET_ID})"

    NET_HOST=$(neutron l3-agent-list-hosting-router ${ROUTER_ID} | head -n 4 | tail -n 1 | grep -Po "[0-9]{6}-[^\ ]+")
    nova_boot_wait
    nova_console

    info "Next test in 5 Seconds."
    sleep 5
done