kilo/e2e/kind.sh
Lucas Servén Marín 6ab338cf58
e2e: add test for allowed location IPs
This commit adds a new e2e test fot the recently introduced
allowed-location-ips annotation. This test annotates the control-plane
node with an allowed IP and then ensures this IPs is reachable from
the curl helper Pod, which is now guaranteed to be scheduled on a
worker node.

Signed-off-by: Lucas Servén Marín <lserven@gmail.com>
2021-06-16 17:01:58 +02:00

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#!/usr/bin/env bash
export KUBECONFIG="kind.yaml"
KIND_CLUSTER="kind-cluster-kilo"
KIND_BINARY="${KIND_BINARY:-kind}"
KUBECTL_BINARY="${KUBECTL_BINARY:-kubectl}"
KGCTL_BINARY="${KGCTL_BINARY:-kgctl}"
KILO_IMAGE="${KILO_IMAGE:-squat/kilo}"
retry() {
local COUNT="${1:-10}"
local SLEEP="${2:-5}"
local ERROR=$3
[ -n "$ERROR" ] && ERROR="$ERROR "
shift 3
for c in $(seq 1 "$COUNT"); do
if "$@"; then
return 0
else
printf "%s(attempt %d/%d)\n" "$ERROR" "$c" "$COUNT" | color "$YELLOW"
if [ "$c" != "$COUNT" ]; then
printf "retrying in %d seconds...\n" "$SLEEP" | color "$YELLOW"
sleep "$SLEEP"
fi
fi
done
return 1
}
_not() {
if "$@"; then
return 1
fi
return 0
}
create_interface() {
docker run -d --name="$1" --rm --network=host --cap-add=NET_ADMIN --device=/dev/net/tun -v /var/run/wireguard:/var/run/wireguard -e WG_LOG_LEVEL=debug leonnicolas/boringtun --foreground --disable-drop-privileges true "$1"
}
delete_interface() {
docker rm --force "$1"
}
create_peer() {
cat <<EOF | $KUBECTL_BINARY apply -f -
apiVersion: kilo.squat.ai/v1alpha1
kind: Peer
metadata:
name: $1
spec:
allowedIPs:
- $2
persistentKeepalive: $3
publicKey: $4
EOF
}
delete_peer() {
$KUBECTL_BINARY delete peer "$1"
}
is_ready() {
for pod in $($KUBECTL_BINARY -n "$1" get pods -o name -l "$2"); do
if ! $KUBECTL_BINARY -n "$1" get "$pod" | tail -n 1 | grep -q Running; then
return 1;
fi
done
return 0
}
# Returns non zero if one pod of the given name in the given namespace is not ready.
block_until_ready_by_name() {
block_until_ready "$1" "app.kubernetes.io/name=$2"
}
# Blocks until all pods of a deployment are ready.
block_until_ready() {
retry 30 5 "some $2 pods are not ready yet" is_ready "$1" "$2"
}
# Set up the kind cluster and deploy Kilo, Adjacency and a helper with curl.
setup_suite() {
$KIND_BINARY delete clusters $KIND_CLUSTER > /dev/null
# Create the kind cluster.
$KIND_BINARY create cluster --name $KIND_CLUSTER --config ./kind-config.yaml
# Load the Kilo image into kind.
docker tag "$KILO_IMAGE" squat/kilo:test
$KIND_BINARY load docker-image squat/kilo:test --name $KIND_CLUSTER
# Create the kubeconfig secret.
$KUBECTL_BINARY create secret generic kubeconfig --from-file=kubeconfig="$KUBECONFIG" -n kube-system
# Apply Kilo the the cluster.
$KUBECTL_BINARY apply -f ../manifests/crds.yaml
$KUBECTL_BINARY apply -f kilo-kind-userspace.yaml
block_until_ready_by_name kube-system kilo-userspace
$KUBECTL_BINARY wait nodes --all --for=condition=Ready
# Wait for CoreDNS.
block_until_ready kube_system k8s-app=kube-dns
# Ensure the curl helper is not scheduled on a control-plane node.
$KUBECTL_BINARY apply -f helper-curl.yaml
block_until_ready_by_name default curl
$KUBECTL_BINARY taint node $KIND_CLUSTER-control-plane node-role.kubernetes.io/master:NoSchedule-
$KUBECTL_BINARY apply -f https://raw.githubusercontent.com/heptoprint/adjacency/master/example.yaml
block_until_ready_by_name adjacency adjacency
}
curl_pod() {
$KUBECTL_BINARY get pods -l app.kubernetes.io/name=curl -o name | xargs -I{} "$KUBECTL_BINARY" exec {} -- /bin/sh -c "curl $*"
}
check_ping() {
local LOCAL
while [ $# -gt 0 ]; do
case $1 in
--local)
LOCAL=true
;;
esac
shift
done
for ip in $($KUBECTL_BINARY get pods -l app.kubernetes.io/name=adjacency -o jsonpath='{.items[*].status.podIP}'); do
if [ -n "$LOCAL" ]; then
ping=$(curl -m 1 -s http://"$ip":8080/ping)
else
ping=$(curl_pod -m 1 -s http://"$ip":8080/ping)
fi
if [ "$ping" = "pong" ]; then
echo "successfully pinged $ip"
else
printf 'failed to ping %s; expected "pong" but got "%s"\n' "$ip" "$ping"
return 1
fi
done
return 0
}
check_adjacent() {
$KUBECTL_BINARY get pods -l app.kubernetes.io/name=curl -o name | xargs -I{} "$KUBECTL_BINARY" exec {} -- /bin/sh -c 'curl -m 1 -s adjacency:8080/?format=fancy'
[ "$(curl_pod -m 1 -s adjacency:8080/?format=json | jq | grep -c true)" -eq "$1" ]
}
check_peer() {
local INTERFACE=$1
local PEER=$2
local ALLOWED_IP=$3
local GRANULARITY=$4
create_interface "$INTERFACE"
docker run --rm --entrypoint=/usr/bin/wg "$KILO_IMAGE" genkey > "$INTERFACE"
assert "create_peer $PEER $ALLOWED_IP 10 $(docker run --rm --entrypoint=/bin/sh -v "$PWD/$INTERFACE":/key "$KILO_IMAGE" -c 'cat /key | wg pubkey')" "should be able to create Peer"
assert "$KGCTL_BINARY showconf peer $PEER --mesh-granularity=$GRANULARITY > $PEER.ini" "should be able to get Peer configuration"
assert "docker run --rm --network=host --cap-add=NET_ADMIN --entrypoint=/usr/bin/wg -v /var/run/wireguard:/var/run/wireguard -v $PWD/$PEER.ini:/peer.ini $KILO_IMAGE setconf $INTERFACE /peer.ini" "should be able to apply configuration from kgctl"
docker run --rm --network=host --cap-add=NET_ADMIN --entrypoint=/usr/bin/wg -v /var/run/wireguard:/var/run/wireguard -v "$PWD/$INTERFACE":/key "$KILO_IMAGE" set "$INTERFACE" private-key /key
docker run --rm --network=host --cap-add=NET_ADMIN --entrypoint=/sbin/ip "$KILO_IMAGE" address add "$ALLOWED_IP" dev "$INTERFACE"
docker run --rm --network=host --cap-add=NET_ADMIN --entrypoint=/sbin/ip "$KILO_IMAGE" link set "$INTERFACE" up
docker run --rm --network=host --cap-add=NET_ADMIN --entrypoint=/sbin/ip "$KILO_IMAGE" route add 10.42/16 dev "$INTERFACE"
assert "retry 10 5 '' check_ping --local" "should be able to ping Pods from host"
rm "$INTERFACE" "$PEER".ini
delete_peer "$PEER"
delete_interface "$INTERFACE"
}
test_locationmesh() {
# shellcheck disable=SC2016
$KUBECTL_BINARY patch ds -n kube-system kilo -p '{"spec": {"template":{"spec":{"containers":[{"name":"kilo","args":["--hostname=$(NODE_NAME)","--create-interface=false","--kubeconfig=/etc/kubernetes/kubeconfig","--mesh-granularity=location"]}]}}}}'
block_until_ready_by_name kube-system kilo-userspace
$KUBECTL_BINARY wait pod -l app.kubernetes.io/name=adjacency --for=condition=Ready --timeout 3m
assert "retry 30 5 '' check_ping" "should be able to ping all Pods"
assert "retry 10 5 'the adjacency matrix is not complete yet' check_adjacent 12" "adjacency should return the right number of successful pings"
echo "sleep for 30s (one reconciliation period) and try again..."
sleep 30
assert "retry 10 5 'the adjacency matrix is not complete yet' check_adjacent 12" "adjacency should return the right number of successful pings after reconciling"
}
test_locationmesh_peer() {
check_peer wg1 e2e 10.5.0.1/32 location
}
test_fullmesh() {
# shellcheck disable=SC2016
$KUBECTL_BINARY patch ds -n kube-system kilo -p '{"spec": {"template":{"spec":{"containers":[{"name":"kilo","args":["--hostname=$(NODE_NAME)","--create-interface=false","--kubeconfig=/etc/kubernetes/kubeconfig","--mesh-granularity=full"]}]}}}}'
block_until_ready_by_name kube-system kilo-userspace
$KUBECTL_BINARY wait pod -l app.kubernetes.io/name=adjacency --for=condition=Ready --timeout 3m
assert "retry 30 5 '' check_ping" "should be able to ping all Pods"
assert "retry 10 5 'the adjacency matrix is not complete yet' check_adjacent 12" "adjacency should return the right number of successful pings"
echo "sleep for 30s (one reconciliation period) and try again..."
sleep 30
assert "retry 10 5 'the adjacency matrix is not complete yet' check_adjacent 12" "adjacency should return the right number of successful pings after reconciling"
}
test_fullmesh_peer() {
check_peer wg1 e2e 10.5.0.1/32 full
}
test_reject_peer_empty_allowed_ips() {
assert_fail "create_peer e2e '' 0 foo" "should not be able to create Peer with empty allowed IPs"
}
test_reject_peer_empty_public_key() {
assert_fail "create_peer e2e 10.5.0.1/32 0 ''" "should not be able to create Peer with empty public key"
}
test_fullmesh_allowed_location_ips() {
docker exec kind-cluster-kilo-control-plane ip address add 10.6.0.1/32 dev eth0
$KUBECTL_BINARY annotate node kind-cluster-kilo-control-plane kilo.squat.ai/allowed-location-ips=10.6.0.1/32
assert_equals Unauthorized "$(retry 10 5 'IP is not yet routable' curl_pod -m 1 -s -k https://10.6.0.1:10250/healthz)" "should be able to make HTTP request to allowed location IP"
$KUBECTL_BINARY annotate node kind-cluster-kilo-control-plane kilo.squat.ai/allowed-location-ips-
assert "retry 10 5 'IP is still routable' _not curl_pod -m 1 -s -k https://10.6.0.1:10250/healthz" "should not be able to make HTTP request to allowed location IP"
docker exec kind-cluster-kilo-control-plane ip address delete 10.6.0.1/32 dev eth0
}
teardown_suite () {
$KIND_BINARY delete clusters $KIND_CLUSTER
}