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k3s/hack/e2e-suite/services.sh

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#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Verifies that services and portals work.
set -o errexit
set -o nounset
set -o pipefail
KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
source "${KUBE_ROOT}/cluster/kube-env.sh"
source "${KUBE_ROOT}/cluster/${KUBERNETES_PROVIDER}/util.sh"
if [[ "$KUBERNETES_PROVIDER" == "vagrant" ]]; then
echo "WARNING: Skipping services.sh for ${KUBERNETES_PROVIDER}. See https://github.com/GoogleCloudPlatform/kubernetes/issues/3655"
exit 0
fi
function error() {
echo "$@" >&2
exit 1
}
function sort_args() {
printf "%s\n" "$@" | sort -n | tr '\n\r' ' ' | sed 's/ */ /g'
}
# Join args $2... with $1 between them.
# Example: join ", " x y z => x, y, z
function join() {
local sep item
sep=$1
shift
echo -n "${1:-}"
shift
for item; do
echo -n "${sep}${item}"
done
echo
}
svcs_to_clean=()
function do_teardown() {
local svc
return
for svc in "${svcs_to_clean[@]:+${svcs_to_clean[@]}}"; do
stop_service "${svc}"
done
}
# Args:
# $1: service name
# $2: service port
# $3: service replica count
# $4: public IPs (optional, string e.g. "1.2.3.4 5.6.7.8")
function start_service() {
echo "Starting service '$1' on port $2 with $3 replicas"
svcs_to_clean+=("$1")
${KUBECTL} create -f - << __EOF__
{
"kind": "ReplicationController",
"apiVersion": "v1beta1",
"id": "$1",
"namespace": "default",
"desiredState": {
"replicas": $3,
"replicaSelector": {
"name": "$1"
},
"podTemplate": {
"desiredState": {
"manifest": {
"version": "v1beta2",
"containers": [
{
"name": "$1",
"image": "kubernetes/serve_hostname",
"ports": [
{
"containerPort": 9376,
"protocol": "TCP"
}
]
}
]
}
},
"labels": {
"name": "$1"
}
}
}
}
__EOF__
# Convert '1.2.3.4 5.6.7.8' => '"1.2.3.4", "5.6.7.8"'
local ip ips_array=() public_ips
for ip in ${4:-}; do
ips_array+=("\"${ip}\"")
done
public_ips=$(join ", " "${ips_array[@]:+${ips_array[@]}}")
${KUBECTL} create -f - << __EOF__
{
"kind": "Service",
"apiVersion": "v1beta1",
"id": "$1",
"namespace": "default",
"port": $2,
"protocol": "TCP",
"labels": {
"name": "$1"
},
"selector": {
"name": "$1"
},
"containerPort": 9376,
"publicIPs": [ ${public_ips} ]
}
__EOF__
}
# Args:
# $1: service name
function stop_service() {
echo "Stopping service '$1'"
${KUBECFG} stop "$1" || true
${KUBECFG} delete "/replicationControllers/$1" || true
${KUBECFG} delete "/services/$1" || true
}
# Args:
# $1: service name
# $2: expected pod count
function query_pods() {
# This fails very occasionally, so retry a bit.
pods_unsorted=()
local i
for i in $(seq 1 10); do
pods_unsorted=($(${KUBECFG} \
'-template={{range.items}}{{.id}} {{end}}' \
-l name="$1" list pods))
found="${#pods_unsorted[*]}"
if [[ "${found}" == "$2" ]]; then
break
fi
sleep 3
done
if [[ "${found}" != "$2" ]]; then
error "Failed to query pods for $1: expected $2, found ${found}"
fi
# The "return" is a sorted list of pod IDs.
sort_args "${pods_unsorted[@]}"
}
# Args:
# $1: service name
# $2: pod count
function wait_for_pods() {
echo "Querying pods in $1"
local pods_sorted=$(query_pods "$1" "$2")
printf '\t%s\n' ${pods_sorted}
# Container turn up on a clean cluster can take a while for the docker image
# pulls. Wait a generous amount of time.
# TODO: Sometimes pods change underneath us, which makes the GET fail (404).
# Maybe this test can be loosened and still be useful?
pods_needed=$2
local i
for i in $(seq 1 30); do
echo "Waiting for ${pods_needed} pods to become 'running'"
pods_needed="$2"
for id in ${pods_sorted}; do
status=$(${KUBECFG} -template '{{.currentState.status}}' get "pods/${id}")
if [[ "${status}" == "Running" ]]; then
pods_needed=$((pods_needed-1))
fi
done
if [[ "${pods_needed}" == 0 ]]; then
break
fi
sleep 3
done
if [[ "${pods_needed}" -gt 0 ]]; then
error "Pods for $1 did not come up in time"
fi
}
# Args:
# $1: service name
# $2: service IP
# $3: service port
# $4: pod count
# $5: pod IDs
function wait_for_service_up() {
local i
local found_pods
for i in $(seq 1 20); do
results=($(ssh-to-node "${test_node}" "
set -e;
for i in $(seq -s' ' 1 $4); do
curl -s --connect-timeout 1 http://$2:$3;
echo;
done | sort | uniq
"))
found_pods=$(sort_args "${results[@]:+${results[@]}}")
echo "Checking if ${found_pods} == ${5}"
if [[ "${found_pods}" == "$5" ]]; then
break
fi
echo "Waiting for endpoints to propagate"
sleep 3
done
if [[ "${found_pods}" != "$5" ]]; then
error "Endpoints did not propagate in time"
fi
}
# Args:
# $1: service name
# $2: service IP
# $3: service port
function wait_for_service_down() {
local i
for i in $(seq 1 15); do
$(ssh-to-node "${test_node}" "
curl -s --connect-timeout 2 "http://$2:$3" >/dev/null 2>&1 && exit 1 || exit 0;
") && break
echo "Waiting for $1 to go down"
sleep 2
done
}
# Args:
# $1: service name
# $2: service IP
# $3: service port
# $4: pod count
# $5: pod IDs
function verify_from_container() {
results=($(ssh-to-node "${test_node}" "
set -e;
sudo docker pull busybox >/dev/null;
sudo docker run busybox sh -c '
for i in $(seq -s' ' 1 $4); do
ok=false
for j in $(seq -s' ' 1 10); do
if wget -q -T 1 -O - http://$2:$3; then
echo
ok=true
break
fi
sleep 1
done
if [[ \${ok} == false ]]; then
exit 1
fi
done
'")) \
|| error "testing $1 portal from container failed"
found_pods=$(sort_args "${results[@]}")
if [[ "${found_pods}" != "$5" ]]; then
error -e "$1 portal failed from container, expected:\n
$(printf '\t%s\n' $5)\n
got:\n
$(printf '\t%s\n' ${found_pods})
"
fi
}
trap "do_teardown" EXIT
# Get node IP addresses and pick one as our test point.
detect-minions
test_node="${MINION_NAMES[0]}"
master="${MASTER_NAME}"
# Launch some pods and services.
svc1_name="service1"
svc1_port=80
svc1_count=3
svc1_publics="192.168.1.1 192.168.1.2"
start_service "${svc1_name}" "${svc1_port}" "${svc1_count}" "${svc1_publics}"
svc2_name="service2"
svc2_port=80
svc2_count=3
start_service "${svc2_name}" "${svc2_port}" "${svc2_count}"
# Wait for the pods to become "running".
wait_for_pods "${svc1_name}" "${svc1_count}"
wait_for_pods "${svc2_name}" "${svc2_count}"
# Get the sorted lists of pods.
svc1_pods=$(query_pods "${svc1_name}" "${svc1_count}")
svc2_pods=$(query_pods "${svc2_name}" "${svc2_count}")
# Get the portal IPs.
svc1_ip=$(${KUBECFG} -template '{{.portalIP}}' get "services/${svc1_name}")
test -n "${svc1_ip}" || error "Service1 IP is blank"
svc2_ip=$(${KUBECFG} -template '{{.portalIP}}' get "services/${svc2_name}")
test -n "${svc2_ip}" || error "Service2 IP is blank"
if [[ "${svc1_ip}" == "${svc2_ip}" ]]; then
error "Portal IPs conflict: ${svc1_ip}"
fi
#
# Test 1: Prove that the service portal is alive.
#
echo "Test 1: Prove that the service portal is alive."
echo "Verifying the portals from the host"
wait_for_service_up "${svc1_name}" "${svc1_ip}" "${svc1_port}" \
"${svc1_count}" "${svc1_pods}"
for ip in ${svc1_publics}; do
wait_for_service_up "${svc1_name}" "${ip}" "${svc1_port}" \
"${svc1_count}" "${svc1_pods}"
done
wait_for_service_up "${svc2_name}" "${svc2_ip}" "${svc2_port}" \
"${svc2_count}" "${svc2_pods}"
echo "Verifying the portals from a container"
verify_from_container "${svc1_name}" "${svc1_ip}" "${svc1_port}" \
"${svc1_count}" "${svc1_pods}"
for ip in ${svc1_publics}; do
verify_from_container "${svc1_name}" "${ip}" "${svc1_port}" \
"${svc1_count}" "${svc1_pods}"
done
verify_from_container "${svc2_name}" "${svc2_ip}" "${svc2_port}" \
"${svc2_count}" "${svc2_pods}"
#
# Test 2: Bounce the proxy and make sure the portal comes back.
#
echo "Test 2: Bounce the proxy and make sure the portal comes back."
echo "Restarting kube-proxy"
restart-kube-proxy "${test_node}"
echo "Verifying the portals from the host"
wait_for_service_up "${svc1_name}" "${svc1_ip}" "${svc1_port}" \
"${svc1_count}" "${svc1_pods}"
wait_for_service_up "${svc2_name}" "${svc2_ip}" "${svc2_port}" \
"${svc2_count}" "${svc2_pods}"
echo "Verifying the portals from a container"
verify_from_container "${svc1_name}" "${svc1_ip}" "${svc1_port}" \
"${svc1_count}" "${svc1_pods}"
verify_from_container "${svc2_name}" "${svc2_ip}" "${svc2_port}" \
"${svc2_count}" "${svc2_pods}"
#
# Test 3: Stop one service and make sure it is gone.
#
echo "Test 3: Stop one service and make sure it is gone."
stop_service "${svc1_name}"
wait_for_service_down "${svc1_name}" "${svc1_ip}" "${svc1_port}"
#
# Test 4: Bring up another service.
# TODO: Actually add a test to force re-use.
#
echo "Test 4: Bring up another service."
svc3_name="service3"
svc3_port=80
svc3_count=3
start_service "${svc3_name}" "${svc3_port}" "${svc3_count}"
# Wait for the pods to become "running".
wait_for_pods "${svc3_name}" "${svc3_count}"
# Get the sorted lists of pods.
svc3_pods=$(query_pods "${svc3_name}" "${svc3_count}")
# Get the portal IP.
svc3_ip=$(${KUBECFG} -template '{{.portalIP}}' get "services/${svc3_name}")
test -n "${svc3_ip}" || error "Service3 IP is blank"
echo "Verifying the portals from the host"
wait_for_service_up "${svc3_name}" "${svc3_ip}" "${svc3_port}" \
"${svc3_count}" "${svc3_pods}"
echo "Verifying the portals from a container"
verify_from_container "${svc3_name}" "${svc3_ip}" "${svc3_port}" \
"${svc3_count}" "${svc3_pods}"
#
# Test 5: Remove the iptables rules, make sure they come back.
#
echo "Test 5: Remove the iptables rules, make sure they come back."
echo "Manually removing iptables rules"
# Remove both the new and old style chains, in case we're testing on an old kubelet
ssh-to-node "${test_node}" "sudo iptables -t nat -F KUBE-PORTALS-HOST || true"
ssh-to-node "${test_node}" "sudo iptables -t nat -F KUBE-PORTALS-CONTAINER || true"
ssh-to-node "${test_node}" "sudo iptables -t nat -F KUBE-PROXY || true"
echo "Verifying the portals from the host"
wait_for_service_up "${svc3_name}" "${svc3_ip}" "${svc3_port}" \
"${svc3_count}" "${svc3_pods}"
echo "Verifying the portals from a container"
verify_from_container "${svc3_name}" "${svc3_ip}" "${svc3_port}" \
"${svc3_count}" "${svc3_pods}"
#
# Test 6: Restart the master, make sure portals come back.
#
echo "Test 6: Restart the master, make sure portals come back."
echo "Restarting the master"
ssh-to-node "${master}" "sudo /etc/init.d/kube-apiserver restart"
sleep 5
echo "Verifying the portals from the host"
wait_for_service_up "${svc3_name}" "${svc3_ip}" "${svc3_port}" \
"${svc3_count}" "${svc3_pods}"
echo "Verifying the portals from a container"
verify_from_container "${svc3_name}" "${svc3_ip}" "${svc3_port}" \
"${svc3_count}" "${svc3_pods}"
#
# Test 7: Bring up another service, make sure it does not re-use Portal IPs.
#
echo "Test 7: Bring up another service, make sure it does not re-use Portal IPs."
svc4_name="service4"
svc4_port=80
svc4_count=3
start_service "${svc4_name}" "${svc4_port}" "${svc4_count}"
# Wait for the pods to become "running".
wait_for_pods "${svc4_name}" "${svc4_count}"
# Get the sorted lists of pods.
svc4_pods=$(query_pods "${svc4_name}" "${svc4_count}")
# Get the portal IP.
svc4_ip=$(${KUBECFG} -template '{{.portalIP}}' get "services/${svc4_name}")
test -n "${svc4_ip}" || error "Service4 IP is blank"
if [[ "${svc4_ip}" == "${svc2_ip}" || "${svc4_ip}" == "${svc3_ip}" ]]; then
error "Portal IPs conflict: ${svc4_ip}"
fi
echo "Verifying the portals from the host"
wait_for_service_up "${svc4_name}" "${svc4_ip}" "${svc4_port}" \
"${svc4_count}" "${svc4_pods}"
echo "Verifying the portals from a container"
verify_from_container "${svc4_name}" "${svc4_ip}" "${svc4_port}" \
"${svc4_count}" "${svc4_pods}"
# TODO: test createExternalLoadBalancer
exit 0
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