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feat(server): Add /clusterz page with info on cluster (#2115)

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It's not the prettiest, but it's functional.
This commit is contained in:
Shahar Mike 2023-11-03 08:09:52 +02:00 • committed by GitHub
parent e46dd24bb7
commit 414f6aad2c
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1 changed files with 92 additions and 0 deletions
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92
src/server/main_service.cc
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@ -549,6 +549,95 @@ void TxTable(const http::QueryArgs& args, HttpContext* send) {
send->Invoke(std::move(resp));
}
void ClusterHtmlPage(const http::QueryArgs& args, HttpContext* send, ClusterFamily* cluster) {
http::StringResponse resp = http::MakeStringResponse(h2::status::ok);
resp.body() = R"(
<html>
<head>
<style>
.title_text {
color: #09bc8d;
font-weight: bold;
min-width: 150px;
display: inline-block;
margin-bottom: 6px;
}
.value_text {
color: #d60f96;
}
.master {
border: 1px solid gray;
margin-bottom: 10px;
padding: 10px;
border-radius: 8px;
}
.master h3 {
padding-left: 20px;
}
</style>
</head>
<body>
<h1>Cluster Info</h1>
)";
auto print_kv = [&](string_view k, string_view v) {
resp.body() += absl::StrCat("<div><span class='title_text'>", k,
"</span><span class='value_text'>", v, "</span></div>\n");
};
auto print_kb = [&](string_view k, bool v) { print_kv(k, v ? "True" : "False"); };
print_kv("Mode", ClusterConfig::IsEmulated() ? "Emulated"
: ClusterConfig::IsEnabled() ? "Enabled"
: "Disabled");
if (ClusterConfig::IsEnabledOrEmulated()) {
print_kb("Lock on hashtags", KeyLockArgs::IsLockHashTagEnabled());
}
if (ClusterConfig::IsEnabled()) {
if (cluster->cluster_config() == nullptr) {
resp.body() += "<h2>Not yet configured.</h2>\n";
} else {
auto config = cluster->cluster_config()->GetConfig();
for (const auto& shard : config) {
resp.body() += "<div class='master'>\n";
resp.body() += "<h3>Master</h3>\n";
print_kv("ID", shard.master.id);
print_kv("IP", shard.master.ip);
print_kv("Port", absl::StrCat(shard.master.port));
resp.body() += "<h3>Replicas</h3>\n";
if (shard.replicas.empty()) {
resp.body() += "<p>None</p>\n";
} else {
for (const auto& replica : shard.replicas) {
resp.body() += "<h4>Replica</h4>\n";
print_kv("ID", replica.id);
print_kv("IP", replica.ip);
print_kv("Port", absl::StrCat(replica.port));
}
}
resp.body() += "<h3>Slots</h3>\n";
for (const auto& slot : shard.slot_ranges) {
resp.body() +=
absl::StrCat("<div>[<span class='value_text'>", slot.start,
"</span>-<span class='value_text'>", slot.end, "</span>]</div>");
}
resp.body() += "</div>\n";
}
}
}
resp.body() += " </body>\n</html>\n";
send->Invoke(std::move(resp));
}
enum class ExecEvalState {
NONE = 0,
ALL = 1,
@ -2201,6 +2290,9 @@ void Service::ConfigureHttpHandlers(util::HttpListenerBase* base, bool is_privil
server_family_.ConfigureMetrics(base);
base->RegisterCb("/txz", TxTable);
base->RegisterCb("/topkeys", Topkeys);
base->RegisterCb("/clusterz", [this](const http::QueryArgs& args, HttpContext* send) {
return ClusterHtmlPage(args, send, &cluster_family_);
});
}
void Service::OnClose(facade::ConnectionContext* cntx) {