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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.node;
import com.yahoo.config.provision.CloudName;
import com.yahoo.config.provision.HostName;
import com.yahoo.config.provision.NodeFlavors;
import com.yahoo.config.provision.NodeType;
import com.yahoo.vespa.hosted.provision.LockedNodeList;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.provisioning.FlavorConfigBuilder;
import com.yahoo.vespa.hosted.provision.testutils.MockNameResolver;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
/**
* @author mpolden
*/
public class IPTest {
private static final NodeFlavors nodeFlavors = FlavorConfigBuilder.createDummies("default");
private static final LockedNodeList emptyList = new LockedNodeList(List.of(), () -> {});
private final MockNameResolver resolver = new MockNameResolver().explicitReverseRecords();
private IP.Allocation.Context contextOf(boolean exclave) {
return IP.Allocation.Context.from(CloudName.AWS, exclave, resolver);
}
@Test
public void test_find_allocation_ipv6_only() {
IP.Pool pool = createNode(List.of(
"::1",
"::2",
"::3"
)).ipConfig().pool();
resolver.addRecord("host1", "::2");
resolver.addRecord("host2", "::3");
resolver.addRecord("host3", "::1");
resolver.addReverseRecord("::3", "host2");
resolver.addReverseRecord("::1", "host3");
resolver.addReverseRecord("::2", "host1");
var context = contextOf(false);
Optional<IP.Allocation> allocation = pool.findAllocation(context, emptyList);
assertEquals(Optional.of("::1"), allocation.get().ipv6Address());
assertFalse(allocation.get().ipv4Address().isPresent());
assertEquals("host3", allocation.get().hostname());
// Allocation fails if DNS record is missing
resolver.removeRecord("host3");
try {
pool.findAllocation(context, emptyList);
fail("Expected exception");
} catch (Exception e) {
assertEquals("java.net.UnknownHostException: Could not resolve: host3", e.getMessage());
}
}
@Test
public void test_find_allocation_ipv4_only() {
var pool = testPool(false);
var allocation = pool.findAllocation(contextOf(false), emptyList);
assertFalse("Found allocation", allocation.isEmpty());
assertEquals(Optional.of("127.0.0.1"), allocation.get().ipv4Address());
assertTrue("No IPv6 address", allocation.get().ipv6Address().isEmpty());
}
@Test
public void test_find_allocation_dual_stack() {
IP.Pool pool = testPool(true);
Optional<IP.Allocation> allocation = pool.findAllocation(contextOf(false), emptyList);
assertEquals(Optional.of("::1"), allocation.get().ipv6Address());
assertEquals("127.0.0.2", allocation.get().ipv4Address().get());
assertEquals("host3", allocation.get().hostname());
}
@Test
public void test_find_allocation_multiple_ipv4_addresses() {
IP.Pool pool = testPool(true);
resolver.addRecord("host3", "127.0.0.127");
try {
pool.findAllocation(contextOf(false), emptyList);
fail("Expected exception");
} catch (IllegalArgumentException e) {
assertEquals("Hostname host3 resolved to more than 1 IPv4 address: [127.0.0.2, 127.0.0.127]",
e.getMessage());
}
}
@Test
public void test_find_allocation_invalid_ipv4_reverse_record() {
var pool = testPool(true);
resolver.removeRecord("127.0.0.2")
.addReverseRecord("127.0.0.2", "host5");
try {
pool.findAllocation(contextOf(false), emptyList);
fail("Expected exception");
} catch (IllegalArgumentException e) {
assertEquals("Hostnames resolved from each IP address do not point to the same hostname " +
"[::1 -> host3, 127.0.0.2 -> host5]", e.getMessage());
}
}
@Test
public void test_enclave() {
// In Enclave, the hosts and their nodes have only public IPv6 addresses,
// and DNS has AAAA records without PTR records.
resolver.addRecord("host1", "2600:1f10:::1")
.addRecord("node1", "2600:1f10:::2")
.addRecord("node2", "2600:1f10:::3");
IP.Config config = IP.Config.of(List.of("2600:1f10:::1"),
List.of("2600:1f10:::2", "2600:1f10:::3"),
List.of(HostName.of("node1"), HostName.of("node2")));
IP.Pool pool = config.pool();
Optional<IP.Allocation> allocation = pool.findAllocation(contextOf(true), emptyList);
}
private IP.Pool testPool(boolean dualStack) {
var addresses = new ArrayList<String>();
addresses.add("127.0.0.1");
addresses.add("127.0.0.2");
addresses.add("127.0.0.3");
if (dualStack) {
addresses.add("::1");
addresses.add("::2");
addresses.add("::3");
}
Node node = createNode(addresses);
// IPv4 addresses
resolver.addRecord("host1", "127.0.0.3")
.addRecord("host2", "127.0.0.1")
.addRecord("host3", "127.0.0.2")
.addReverseRecord("127.0.0.1", "host2")
.addReverseRecord("127.0.0.2", "host3")
.addReverseRecord("127.0.0.3", "host1");
// IPv6 addresses
if (dualStack) {
resolver.addRecord("host1", "::2")
.addRecord("host2", "::3")
.addRecord("host3", "::1")
.addReverseRecord("::3", "host2")
.addReverseRecord("::1", "host3")
.addReverseRecord("::2", "host1");
}
IP.Pool pool = node.ipConfig().pool();
assertNotEquals(dualStack, pool.ipAddresses().stack() == IP.IpAddresses.Stack.ipv4);
return pool;
}
private static Node createNode(List<String> ipAddresses) {
return Node.create("id1", IP.Config.of(List.of("127.0.0.1"), ipAddresses),
"host1", nodeFlavors.getFlavorOrThrow("default"), NodeType.host).build();
}
}
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