1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.orchestrator.controller;
import ai.vespa.hosted.client.HttpClient;
import ai.vespa.hosted.client.HttpClient.HostStrategy;
import ai.vespa.hosted.client.HttpClient.ResponseException;
import ai.vespa.hosted.client.HttpClient.ResponseVerifier;
import ai.vespa.http.DomainName;
import ai.vespa.http.HttpURL;
import ai.vespa.http.HttpURL.Query;
import ai.vespa.http.HttpURL.Scheme;
import com.yahoo.concurrent.UncheckedTimeoutException;
import com.yahoo.slime.Cursor;
import com.yahoo.slime.Inspector;
import com.yahoo.slime.Slime;
import com.yahoo.slime.SlimeUtils;
import com.yahoo.vespa.applicationmodel.ApplicationInstanceId;
import com.yahoo.vespa.applicationmodel.HostName;
import com.yahoo.vespa.orchestrator.ApplicationStateChangeDeniedException;
import com.yahoo.vespa.orchestrator.OrchestratorContext;
import com.yahoo.vespa.orchestrator.model.ContentService;
import com.yahoo.vespa.orchestrator.policy.HostStateChangeDeniedException;
import com.yahoo.vespa.orchestrator.policy.HostedVespaPolicy;
import com.yahoo.yolean.Exceptions;
import org.apache.hc.core5.http.ClassicHttpRequest;
import org.apache.hc.core5.http.Method;
import java.io.UncheckedIOException;
import java.net.URI;
import java.util.List;
import java.util.stream.Collectors;
import static java.nio.charset.StandardCharsets.UTF_8;
/**
* @author jonmv
*/
public class ClusterControllerClientImpl implements ClusterControllerClient {
enum Condition {
FORCE, SAFE;
}
public static final String REQUEST_REASON = "Orchestrator";
private final HttpClient client;
private final List<HostName> hosts;
private final String clusterName;
ClusterControllerClientImpl(HttpClient client, List<HostName> hosts, String clusterName) {
this.clusterName = clusterName;
this.hosts = hosts;
this.client = client;
}
private boolean setNodeState(OrchestratorContext context, HostName host, int storageNodeIndex,
ClusterControllerNodeState wantedState, ContentService contentService,
Condition condition, boolean throwOnFailure) {
try {
ClusterControllerClientTimeouts timeouts = context.getClusterControllerTimeouts();
Inspector response = client.send(strategy(hosts), Method.POST)
.at("cluster", "v2", clusterName, contentService.nameInClusterController(),
Integer.toString(storageNodeIndex))
.deadline(timeouts.readBudget())
.parameters(() -> deadline(timeouts))
.body(stateChangeRequestBytes(wantedState, condition, context.isProbe()))
.throwing(retryOnRedirect)
.read(SlimeUtils::jsonToSlime).get();
if ( ! response.field("wasModified").asBool()) {
if (throwOnFailure)
throw new HostStateChangeDeniedException(host,
HostedVespaPolicy.SET_NODE_STATE_CONSTRAINT,
"Failed to set state to " + wantedState +
" in cluster controller: " + response.field("reason").asString());
return false;
}
return true;
}
catch (ResponseException e) {
throw new HostStateChangeDeniedException(host,
HostedVespaPolicy.SET_NODE_STATE_CONSTRAINT,
"Failed setting node " + storageNodeIndex + " in cluster " +
clusterName + " to state " + wantedState + ": " + e.getMessage());
}
catch (UncheckedIOException e) {
throw new HostStateChangeDeniedException(host,
HostedVespaPolicy.CLUSTER_CONTROLLER_AVAILABLE_CONSTRAINT,
String.format("Giving up setting %s for storage node with index %d in cluster %s: %s",
wantedState,
storageNodeIndex,
clusterName,
e.getMessage()),
e.getCause());
}
catch (UncheckedTimeoutException e) {
throw new HostStateChangeDeniedException(host,
HostedVespaPolicy.DEADLINE_CONSTRAINT,
"Timeout while waiting for setNodeState(" + storageNodeIndex + ", " + wantedState +
") against " + hosts + ": " + e.getMessage(),
e);
}
}
@Override
public boolean trySetNodeState(OrchestratorContext context, HostName host, int storageNodeIndex,
ClusterControllerNodeState wantedState, ContentService contentService, boolean force)
throws HostStateChangeDeniedException {
return setNodeState(context, host, storageNodeIndex, wantedState, contentService, force ? Condition.FORCE : Condition.SAFE, false);
}
@Override
public void setNodeState(OrchestratorContext context, HostName host, int storageNodeIndex,
ClusterControllerNodeState wantedState, ContentService contentService, boolean force)
throws HostStateChangeDeniedException {
setNodeState(context, host, storageNodeIndex, wantedState, contentService, force ? Condition.FORCE : Condition.SAFE, true);
}
@Override
public void setApplicationState(OrchestratorContext context, ApplicationInstanceId applicationId,
ClusterControllerNodeState wantedState) throws ApplicationStateChangeDeniedException {
try {
ClusterControllerClientTimeouts timeouts = context.getClusterControllerTimeouts();
Inspector response = client.send(strategy(hosts), Method.POST)
.at("cluster", "v2", clusterName)
.deadline(timeouts.readBudget())
.parameters(() -> deadline(timeouts))
.body(stateChangeRequestBytes(wantedState, Condition.FORCE, false))
.throwing(retryOnRedirect)
.read(SlimeUtils::jsonToSlime).get();
if ( ! response.field("wasModified").asBool()) {
throw new ApplicationStateChangeDeniedException("Failed to set application " + applicationId + ", cluster name " +
clusterName + " to cluster state " + wantedState + " due to: " +
response.field("reason").asString());
}
}
catch (ResponseException e) {
throw new ApplicationStateChangeDeniedException("Failed to set application " + applicationId + " cluster name " +
clusterName + " to cluster state " + wantedState + " due to: " + e.getMessage());
}
catch (UncheckedIOException e) {
throw new ApplicationStateChangeDeniedException("Failed communicating with cluster controllers " + hosts +
" with cluster ID " + clusterName + ": " + e.getCause().getMessage());
}
catch (UncheckedTimeoutException e) {
throw new ApplicationStateChangeDeniedException("Timed out while waiting for cluster controllers " + hosts +
" with cluster ID " + clusterName + ": " + e.getMessage());
}
}
static byte[] stateChangeRequestBytes(ClusterControllerNodeState wantedState, Condition condition, boolean isProbe) {
Cursor root = new Slime().setObject();
Cursor userObject = root.setObject("state").setObject("user");
userObject.setString("reason", REQUEST_REASON);
userObject.setString("state", wantedState.getWireName());
root.setString("condition", condition.name());
if (isProbe) root.setBool("probe", true);
return Exceptions.uncheck(() -> SlimeUtils.toJsonBytes(root));
}
/** ᕙ༼◕_◕༽ᕤ hack to vary query parameters with retries ᕙ༼◕_◕༽ᕤ */
static HostStrategy strategy(List<HostName> hosts) {
return hosts.size() == 1
// If there's only 1 CC, we'll try that one twice.
? HostStrategy.repeating(toUrl(hosts.get(0)), 2)
// Otherwise, try each host once:
// * if host 1 responds, it will redirect to master if necessary; otherwise
// * if host 2 responds, it will redirect to master if necessary; otherwise
// * if host 3 responds, it may redirect to master if necessary (if they're up
// after all), but more likely there's no quorum and this will fail too.
: HostStrategy.ordered(hosts.stream().map(ClusterControllerClientImpl::toUrl).toList());
}
static URI toUrl(HostName host) {
return HttpURL.create(Scheme.http, DomainName.of(host.s()), 19050).asURI();
}
static Query deadline(ClusterControllerClientTimeouts timeouts) {
return Query.empty().set("timeout", Double.toString(timeouts.getServerTimeoutOrThrow().toMillis() * 1e-3));
}
static final ResponseVerifier retryOnRedirect = new ResponseVerifier() {
@Override
public boolean shouldRetry(int statusCode) { // Need to try the other servers when we get a redirect.
return statusCode < 400 || statusCode == 503;
}
@Override
public RuntimeException toException(int statusCode, byte[] body, ClassicHttpRequest request) {
Inspector root = SlimeUtils.jsonToSlime(body).get();
String detail = root.field("message").valid() ? root.field("message").asString()
: new String(body, UTF_8);
return new ResponseException(statusCode,
"got status code " + statusCode + " for " + request + (detail.isBlank() ? "" : ": " + detail));
}
};
}
|
