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arangodb/tests/Agency/FailedServerTest.cpp

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////////////////////////////////////////////////////////////////////////////////
/// @brief test case for FailedServer job
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2017 ArangoDB GmbH, Cologne, Germany
///
/// 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.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Kaveh Vahedipour
/// @author Copyright 2017, ArangoDB GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////
#include "catch.hpp"
#include "fakeit.hpp"
#include "Agency/AddFollower.h"
#include "Agency/FailedServer.h"
#include "Agency/MoveShard.h"
#include "Agency/AgentInterface.h"
#include "Agency/Node.h"
#include "lib/Basics/StringUtils.h"
#include <iostream>
#include <velocypack/Parser.h>
#include <velocypack/Slice.h>
#include <velocypack/velocypack-aliases.h>
using namespace arangodb;
using namespace arangodb::basics;
using namespace arangodb::consensus;
using namespace fakeit;
namespace arangodb {
namespace tests {
namespace failed_server_test {
const std::string PREFIX = "/arango";
const std::string DATABASE = "database";
const std::string COLLECTION = "collection";
const std::string SHARD = "shard";
const std::string SHARD_LEADER = "leader";
const std::string SHARD_FOLLOWER1 = "follower1";
const std::string SHARD_FOLLOWER2 = "follower2";
const std::string FREE_SERVER = "free";
const std::string FREE_SERVER2 = "free2";
bool aborts = false;
typedef std::function<std::unique_ptr<Builder>(
Slice const&, std::string const&)>TestStructureType;
const char *agency =
#include "FailedServerTest.json"
;
Node createNodeFromBuilder(VPackBuilder const& builder) {
VPackBuilder opBuilder;
{ VPackObjectBuilder a(&opBuilder);
opBuilder.add("new", builder.slice()); }
Node node("");
node.handle<SET>(opBuilder.slice());
return node;
}
Builder createBuilder(char const* c) {
VPackOptions options;
options.checkAttributeUniqueness = true;
VPackParser parser(&options);
parser.parse(c);
VPackBuilder builder;
builder.add(parser.steal()->slice());
return builder;
}
Node createNode(char const* c) {
return createNodeFromBuilder(createBuilder(c));
}
Node createRootNode() {
return createNode(agency);
}
inline std::string typeName(Slice const& slice) {
return std::string(slice.typeName());
}
TEST_CASE("FailedServer", "[agency][supervision]") {
std::string const jobId = "1";
auto transBuilder = std::make_shared<Builder>();
{ VPackArrayBuilder a(transBuilder.get());
transBuilder->add(VPackValue((uint64_t)1)); }
auto agency = createRootNode();
write_ret_t fakeWriteResult {
true, "", std::vector<apply_ret_t> {APPLIED}, std::vector<index_t> {1}};
trans_ret_t fakeTransResult {true, "", 1, 0, transBuilder};
SECTION("creating a job should create a job in todo") {
Mock<AgentInterface> mockAgent;
std::string jobId = "1";
When(Method(mockAgent, write)).AlwaysDo([&](query_t const& q, consensus::AgentInterface::WriteMode w) -> write_ret_t {
INFO(q->slice().toJson());
auto expectedJobKey = PREFIX + toDoPrefix + jobId;
REQUIRE(typeName(q->slice()) == "array");
REQUIRE(q->slice().length() == 1);
REQUIRE(typeName(q->slice()[0]) == "array");
REQUIRE(q->slice()[0].length() == 2);
REQUIRE(typeName(q->slice()[0][0]) == "object");
REQUIRE(q->slice()[0][0].length() == 2);
REQUIRE(typeName(q->slice()[0][0].get(expectedJobKey)) == "object");
auto job = q->slice()[0][0].get(expectedJobKey);
REQUIRE(typeName(job.get("creator")) == "string");
REQUIRE(typeName(job.get("type")) == "string");
CHECK(job.get("type").copyString() == "failedServer");
REQUIRE(typeName(job.get("server")) == "string");
CHECK(job.get("server").copyString() == SHARD_LEADER);
CHECK(typeName(job.get("jobId")) == "string");
CHECK(typeName(job.get("timeCreated")) == "string");
return fakeWriteResult;
});
When(Method(mockAgent, waitFor)).AlwaysReturn(AgentInterface::raft_commit_t::OK);
auto &agent = mockAgent.get();
auto builder = agency.toBuilder();
FailedServer(
agency(PREFIX), &agent, jobId, "unittest", SHARD_LEADER).create();
Verify(Method(mockAgent, write));
} // SECTION
SECTION("The state is still 'BAD' and 'Target/FailedServers' is still as in the snapshot. Violate: GOOD") {
TestStructureType createTestStructure = [&](
Slice const& s, std::string const& path) {
std::unique_ptr<Builder> builder;
if (path == "/arango/Plan/Collections/" + DATABASE + "/" + COLLECTION) {
return builder;
}
builder = std::make_unique<Builder>();
if (s.isObject()) {
VPackObjectBuilder b(builder.get());
for (auto const& it: VPackObjectIterator(s)) {
auto childBuilder =
createTestStructure(it.value, path + "/" + it.key.copyString());
if (childBuilder) {
builder->add(it.key.copyString(), childBuilder->slice());
}
}
if (path == "/arango/Supervision/Health/leader") {
builder->add("Status", VPackValue("GOOD"));
}
} else {
builder->add(s);
}
return builder;
};
auto builder = createTestStructure(agency.toBuilder().slice(), "");
REQUIRE(builder);
Node agency = createNodeFromBuilder(*builder);
Mock<AgentInterface> mockAgent;
When(Method(mockAgent, write)).AlwaysDo([&](query_t const& q, consensus::AgentInterface::WriteMode w) -> write_ret_t {
INFO(q->slice().toJson());
REQUIRE(typeName(q->slice()) == "array" );
REQUIRE(q->slice().length() == 1);
REQUIRE(typeName(q->slice()[0]) == "array");
// we always simply override! no preconditions...
REQUIRE(q->slice()[0].length() == 2);
REQUIRE(typeName(q->slice()[0][0]) == "object");
REQUIRE(typeName(q->slice()[0][1]) == "object");
auto writes = q->slice()[0][0];
REQUIRE(typeName(writes.get("/arango/Target/ToDo/1")) == "object");
REQUIRE(writes.get("/arango/Target/ToDo/1").get("server").copyString() == SHARD_LEADER);
auto precond = q->slice()[0][1];
REQUIRE(typeName(precond.get("/arango/Supervision/Health/leader/Status")) == "object");
REQUIRE(precond.get("/arango/Supervision/Health/leader/Status").get("old").copyString() == "BAD");
REQUIRE(typeName(precond.get("/arango/Target/FailedServers").get("old")) == "object");
return fakeWriteResult;
});
When(Method(mockAgent, waitFor)).AlwaysReturn(AgentInterface::raft_commit_t::OK);
auto& agent = mockAgent.get();
FailedServer(
agency(PREFIX), &agent, jobId, "unittest", SHARD_LEADER).create();
Verify(Method(mockAgent,write));
} // SECTION
SECTION("The state is still 'BAD' and 'Target/FailedServers' is still as in the snapshot. Violate: FAILED") {
TestStructureType createTestStructure = [&](
Slice const& s, std::string const& path) {
std::unique_ptr<Builder> builder;
if (path == "/arango/Plan/Collections/" + DATABASE + "/" + COLLECTION) {
return builder;
}
builder = std::make_unique<Builder>();
if (s.isObject()) {
VPackObjectBuilder b(builder.get());
for (auto const& it: VPackObjectIterator(s)) {
auto childBuilder =
createTestStructure(it.value, path + "/" + it.key.copyString());
if (childBuilder) {
builder->add(it.key.copyString(), childBuilder->slice());
}
}
if (path == "/arango/Supervision/Health/leader") {
builder->add("Status", VPackValue("FAILED"));
}
} else {
builder->add(s);
}
return builder;
};
auto builder = createTestStructure(agency.toBuilder().slice(), "");
REQUIRE(builder);
Node agency = createNodeFromBuilder(*builder);
Mock<AgentInterface> mockAgent;
When(Method(mockAgent, write)).AlwaysDo([&](query_t const& q, consensus::AgentInterface::WriteMode w) -> write_ret_t {
INFO(q->slice().toJson());
REQUIRE(typeName(q->slice()) == "array" );
REQUIRE(q->slice().length() == 1);
REQUIRE(typeName(q->slice()[0]) == "array");
// we always simply override! no preconditions...
REQUIRE(q->slice()[0].length() == 2);
REQUIRE(typeName(q->slice()[0][0]) == "object");
REQUIRE(typeName(q->slice()[0][1]) == "object");
auto writes = q->slice()[0][0];
REQUIRE(typeName(writes.get("/arango/Target/ToDo/1")) == "object");
REQUIRE(writes.get("/arango/Target/ToDo/1").get("server").copyString() == SHARD_LEADER);
auto precond = q->slice()[0][1];
REQUIRE(typeName(precond.get("/arango/Supervision/Health/leader/Status")) == "object");
REQUIRE(precond.get("/arango/Supervision/Health/leader/Status").get("old").copyString() == "BAD");
REQUIRE(typeName(precond.get("/arango/Target/FailedServers").get("old")) == "object");
return fakeWriteResult;
});
When(Method(mockAgent, waitFor)).AlwaysReturn(AgentInterface::raft_commit_t::OK);
auto& agent = mockAgent.get();
FailedServer(
agency(PREFIX), &agent, jobId, "unittest", SHARD_LEADER).create();
} // SECTION
SECTION("The state is still 'FAILED' and 'Target/FailedServers' is still as in the snapshot") {
TestStructureType createTestStructure = [&](
Slice const& s, std::string const& path) {
std::unique_ptr<Builder> builder;
if (path == "/arango/Plan/Collections/" + DATABASE + "/" + COLLECTION) {
return builder;
}
builder = std::make_unique<Builder>();
if (s.isObject()) {
VPackObjectBuilder b(builder.get());
for (auto const& it: VPackObjectIterator(s)) {
auto childBuilder = createTestStructure(it.value, path + "/" + it.key.copyString());
if (childBuilder) {
builder->add(it.key.copyString(), childBuilder->slice());
}
}
if (path == "/arango/Target/ToDo") {
char const* todo =
R"=({"creator":"unittest","jobId":"1","server":"leader",
"timeCreated":"2017-04-10T11:40:09Z","type":"failedServer"})=";
builder->add(jobId, createBuilder(todo).slice());
}
builder->close();
} else {
builder->add(s);
}
return builder;
};
auto builder = createTestStructure(agency.toBuilder().slice(), "");
REQUIRE(builder);
Node agency = createNodeFromBuilder(*builder);
Mock<AgentInterface> mockAgent;
When(Method(mockAgent, write)).AlwaysDo([&](query_t const& q, consensus::AgentInterface::WriteMode w) -> write_ret_t {
INFO(q->slice().toJson());
REQUIRE(typeName(q->slice()) == "array" );
REQUIRE(q->slice().length() == 1);
REQUIRE(typeName(q->slice()[0]) == "array");
// we always simply override! no preconditions...
REQUIRE(q->slice()[0].length() == 1);
REQUIRE(typeName(q->slice()[0][0]) == "object");
auto writes = q->slice()[0][0];
REQUIRE(typeName(writes.get("/arango/Target/ToDo/1")) == "object");
REQUIRE(typeName(writes.get("/arango/Target/ToDo/1").get("op")) == "string");
CHECK(writes.get("/arango/Target/ToDo/1").get("op").copyString() == "delete");
CHECK(typeName(writes.get("/arango/Target/Pending/1")) == "object");
return fakeWriteResult;
});
When(Method(mockAgent, waitFor)).AlwaysReturn(AgentInterface::raft_commit_t::OK);
auto& agent = mockAgent.get();
FailedServer(agency("arango"), &agent, JOB_STATUS::TODO, jobId).start(aborts);
Verify(Method(mockAgent,write));
} // SECTION
SECTION("The state is still 'FAILED' and 'Target/FailedServers' is PART 2") {
TestStructureType createTestStructure = [&](
Slice const& s, std::string const& path) {
std::unique_ptr<Builder> builder;
if (path == "/arango/Plan/Collections/" + DATABASE + "/" + COLLECTION) {
return builder;
}
builder = std::make_unique<Builder>();
if (s.isObject()) {
VPackObjectBuilder b(builder.get());
for (auto const& it: VPackObjectIterator(s)) {
auto childBuilder = createTestStructure(it.value, path + "/" + it.key.copyString());
if (childBuilder) {
builder->add(it.key.copyString(), childBuilder->slice());
}
}
if (path == "/arango/Target/ToDo") {
char const* todo =
R"=({"creator":"unittest","jobId":"1","server":"leader",
"timeCreated":"2017-04-10T11:40:09Z","type":"failedServer"})=";
builder->add(jobId, createBuilder(todo).slice());
}
builder->close();
} else {
if (path == "/arango/Supervision/Health/leader/Status") {
builder->add("/arango/Supervision/Health/leader/Status", VPackValue("FAILED"));
}
builder->add(s);
}
return builder;
};
auto builder = createTestStructure(agency.toBuilder().slice(), "");
REQUIRE(builder);
Node agency = createNodeFromBuilder(*builder);
Mock<AgentInterface> mockAgent;
When(Method(mockAgent, write)).AlwaysDo([&](query_t const& q, consensus::AgentInterface::WriteMode w) -> write_ret_t {
INFO(q->slice().toJson());
REQUIRE(typeName(q->slice()) == "array" );
REQUIRE(q->slice().length() == 1);
REQUIRE(typeName(q->slice()[0]) == "array");
// we always simply override! no preconditions...
REQUIRE(q->slice()[0].length() == 1);
REQUIRE(typeName(q->slice()[0][0]) == "object");
auto writes = q->slice()[0][0];
REQUIRE(typeName(writes.get("/arango/Target/ToDo/1")) == "object");
REQUIRE(typeName(writes.get("/arango/Target/ToDo/1").get("op")) == "string");
CHECK(writes.get("/arango/Target/ToDo/1").get("op").copyString() == "delete");
CHECK(typeName(writes.get("/arango/Target/Pending/1")) == "object");
return fakeWriteResult;
});
When(Method(mockAgent, waitFor)).AlwaysReturn(AgentInterface::raft_commit_t::OK);
auto& agent = mockAgent.get();
FailedServer(agency("arango"), &agent, JOB_STATUS::TODO, jobId).start(aborts);
Verify(Method(mockAgent,write));
} // SECTION
} // TEST_CASE
}}} // namespaces
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