/**
* collectd - src/grpc.cc
- * Copyright (C) 2015 Sebastian Harl
+ * Copyright (C) 2015-2016 Sebastian Harl
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
#include <grpc++/grpc++.h>
#include <google/protobuf/util/time_util.h>
+#include <fstream>
+#include <iostream>
+#include <vector>
+
#include "collectd.grpc.pb.h"
extern "C" {
+#include <fnmatch.h>
#include <stdbool.h>
-#include <pthread.h>
#include "collectd.h"
#include "common.h"
#include "plugin.h"
#include "daemon/utils_cache.h"
-
- typedef struct {
- char *addr;
- char *port;
- } listener_t;
-
- static listener_t *listeners;
- static size_t listeners_num;
}
using collectd::Collectd;
using collectd::DispatchValuesRequest;
using collectd::DispatchValuesReply;
-using collectd::ListValuesRequest;
-using collectd::ListValuesReply;
+using collectd::QueryValuesRequest;
+using collectd::QueryValuesReply;
using google::protobuf::util::TimeUtil;
/*
+ * private types
+ */
+
+struct Listener {
+ grpc::string addr;
+ grpc::string port;
+
+ grpc::SslServerCredentialsOptions *ssl;
+};
+static std::vector<Listener> listeners;
+static grpc::string default_addr("0.0.0.0:50051");
+
+/*
+ * helper functions
+ */
+
+static bool ident_matches(const value_list_t *vl, const value_list_t *matcher)
+{
+ if (fnmatch(matcher->host, vl->host, 0))
+ return false;
+
+ if (fnmatch(matcher->plugin, vl->plugin, 0))
+ return false;
+ if (fnmatch(matcher->plugin_instance, vl->plugin_instance, 0))
+ return false;
+
+ if (fnmatch(matcher->type, vl->type, 0))
+ return false;
+ if (fnmatch(matcher->type_instance, vl->type_instance, 0))
+ return false;
+
+ return true;
+} /* ident_matches */
+
+static grpc::string read_file(const char *filename)
+{
+ std::ifstream f;
+ grpc::string s, content;
+
+ f.open(filename);
+ if (!f.is_open()) {
+ ERROR("grpc: Failed to open '%s'", filename);
+ return "";
+ }
+
+ while (std::getline(f, s)) {
+ content += s;
+ content.push_back('\n');
+ }
+ f.close();
+ return content;
+} /* read_file */
+
+/*
* proto conversion
*/
-static grpc::Status unmarshal_ident(const collectd::types::Identifier &msg, value_list_t *vl)
+static void marshal_ident(const value_list_t *vl, collectd::types::Identifier *msg)
+{
+ msg->set_host(vl->host);
+ msg->set_plugin(vl->plugin);
+ if (vl->plugin_instance[0] != '\0')
+ msg->set_plugin_instance(vl->plugin_instance);
+ msg->set_type(vl->type);
+ if (vl->type_instance[0] != '\0')
+ msg->set_type_instance(vl->type_instance);
+} /* marshal_ident */
+
+static grpc::Status unmarshal_ident(const collectd::types::Identifier &msg, value_list_t *vl,
+ bool require_fields)
{
std::string s;
s = msg.host();
- if (!s.length())
+ if (!s.length() && require_fields)
return grpc::Status(grpc::StatusCode::INVALID_ARGUMENT,
grpc::string("missing host name"));
sstrncpy(vl->host, s.c_str(), sizeof(vl->host));
s = msg.plugin();
- if (!s.length())
+ if (!s.length() && require_fields)
return grpc::Status(grpc::StatusCode::INVALID_ARGUMENT,
grpc::string("missing plugin name"));
sstrncpy(vl->plugin, s.c_str(), sizeof(vl->plugin));
s = msg.type();
- if (!s.length())
+ if (!s.length() && require_fields)
return grpc::Status(grpc::StatusCode::INVALID_ARGUMENT,
grpc::string("missing type name"));
sstrncpy(vl->type, s.c_str(), sizeof(vl->type));
return grpc::Status::OK;
} /* unmarshal_ident() */
+static grpc::Status marshal_value_list(const value_list_t *vl, collectd::types::ValueList *msg)
+{
+ auto id = msg->mutable_identifier();
+ marshal_ident(vl, id);
+
+ auto ds = plugin_get_ds(vl->type);
+ if ((ds == NULL) || (ds->ds_num != vl->values_len)) {
+ return grpc::Status(grpc::StatusCode::INTERNAL,
+ grpc::string("failed to retrieve data-set for values"));
+ }
+
+ auto t = TimeUtil::NanosecondsToTimestamp(CDTIME_T_TO_NS(vl->time));
+ auto d = TimeUtil::NanosecondsToDuration(CDTIME_T_TO_NS(vl->interval));
+ msg->set_allocated_time(new google::protobuf::Timestamp(t));
+ msg->set_allocated_interval(new google::protobuf::Duration(d));
+
+ for (size_t i = 0; i < vl->values_len; ++i) {
+ auto v = msg->add_value();
+ switch (ds->ds[i].type) {
+ case DS_TYPE_COUNTER:
+ v->set_counter(vl->values[i].counter);
+ break;
+ case DS_TYPE_GAUGE:
+ v->set_gauge(vl->values[i].gauge);
+ break;
+ case DS_TYPE_DERIVE:
+ v->set_derive(vl->values[i].derive);
+ break;
+ case DS_TYPE_ABSOLUTE:
+ v->set_absolute(vl->values[i].absolute);
+ break;
+ default:
+ return grpc::Status(grpc::StatusCode::INTERNAL,
+ grpc::string("unknown value type"));
+ }
+ }
+
+ return grpc::Status::OK;
+} /* marshal_value_list */
+
static grpc::Status unmarshal_value_list(const collectd::types::ValueList &msg, value_list_t *vl)
{
vl->time = NS_TO_CDTIME_T(TimeUtil::TimestampToNanoseconds(msg.time()));
vl->interval = NS_TO_CDTIME_T(TimeUtil::DurationToNanoseconds(msg.interval()));
- auto status = unmarshal_ident(msg.identifier(), vl);
+ auto status = unmarshal_ident(msg.identifier(), vl, true);
if (!status.ok())
return status;
value_t *values = NULL;
size_t values_len = 0;
- status = grpc::Status::OK;
+ status = grpc::Status::OK;
for (auto v : msg.value()) {
value_t *val = (value_t *)realloc(values, (values_len + 1) * sizeof(*values));
if (!val) {
} /* Process(): DispatchValues */
static grpc::Status Process(grpc::ServerContext *ctx,
- ListValuesRequest request, ListValuesReply *reply)
+ QueryValuesRequest request, QueryValuesReply *reply)
{
- char **names = NULL;
- cdtime_t *times = NULL;
- size_t i, n = 0;
+ uc_iter_t *iter;
+ char *name = NULL;
- if (uc_get_names(&names, ×, &n))
+ value_list_t matcher;
+ auto status = unmarshal_ident(request.identifier(), &matcher, false);
+ if (!status.ok())
+ return status;
+
+ if ((iter = uc_get_iterator()) == NULL) {
return grpc::Status(grpc::StatusCode::INTERNAL,
- grpc::string("failed to retrieve values"));
-
- for (i = 0; i < n; i++) {
- auto v = reply->add_value();
- auto t = TimeUtil::NanosecondsToTimestamp(CDTIME_T_TO_NS(times[i]));
- v->set_name(names[i]);
- v->set_allocated_time(new google::protobuf::Timestamp(t));
- sfree(names[i]);
+ grpc::string("failed to query values: cannot create iterator"));
}
- sfree(names);
- sfree(times);
- return grpc::Status::OK;
-} /* Process(): ListValues */
+ status = grpc::Status::OK;
+ while (uc_iterator_next(iter, &name) == 0) {
+ value_list_t res;
+ if (parse_identifier_vl(name, &res) != 0) {
+ status = grpc::Status(grpc::StatusCode::INTERNAL,
+ grpc::string("failed to parse identifier"));
+ break;
+ }
+
+ if (!ident_matches(&res, &matcher))
+ continue;
+
+ if (uc_iterator_get_time(iter, &res.time) < 0) {
+ status = grpc::Status(grpc::StatusCode::INTERNAL,
+ grpc::string("failed to retrieve value timestamp"));
+ break;
+ }
+ if (uc_iterator_get_interval(iter, &res.interval) < 0) {
+ status = grpc::Status(grpc::StatusCode::INTERNAL,
+ grpc::string("failed to retrieve value interval"));
+ break;
+ }
+ if (uc_iterator_get_values(iter, &res.values, &res.values_len) < 0) {
+ status = grpc::Status(grpc::StatusCode::INTERNAL,
+ grpc::string("failed to retrieve values"));
+ break;
+ }
+
+ auto vl = reply->add_values();
+ status = marshal_value_list(&res, vl);
+ free(res.values);
+ if (!status.ok())
+ break;
+ }
+
+ uc_iterator_destroy(iter);
+
+ return status;
+} /* Process(): QueryValues */
class Call
{
public:
void Start()
{
- // TODO: make configurable
auto auth = grpc::InsecureServerCredentials();
grpc::ServerBuilder builder;
- if (!listeners_num) {
- std::string default_addr("0.0.0.0:50051");
+ if (listeners.empty()) {
builder.AddListeningPort(default_addr, auth);
INFO("grpc: Listening on %s", default_addr.c_str());
}
else {
- size_t i;
- for (i = 0; i < listeners_num; i++) {
- auto l = listeners[i];
- std::string addr(l.addr);
- addr += std::string(":") + std::string(l.port);
- builder.AddListeningPort(addr, auth);
- INFO("grpc: Listening on %s", addr.c_str());
+ for (auto l : listeners) {
+ grpc::string addr = l.addr + ":" + l.port;
+
+ auto use_ssl = grpc::string("");
+ auto a = auth;
+ if (l.ssl != nullptr) {
+ use_ssl = grpc::string(" (SSL enabled)");
+ a = grpc::SslServerCredentials(*l.ssl);
+ }
+
+ builder.AddListeningPort(addr, a);
+ INFO("grpc: Listening on %s%s", addr.c_str(), use_ssl.c_str());
}
}
// Register request types.
new RpcCall<DispatchValuesRequest, DispatchValuesReply>(&service_,
&Collectd::AsyncService::RequestDispatchValues, cq_.get());
- new RpcCall<ListValuesRequest, ListValuesReply>(&service_,
- &Collectd::AsyncService::RequestListValues, cq_.get());
+ new RpcCall<QueryValuesRequest, QueryValuesReply>(&service_,
+ &Collectd::AsyncService::RequestQueryValues, cq_.get());
while (true) {
void *req = NULL;
static int c_grpc_config_listen(oconfig_item_t *ci)
{
- listener_t *listener;
- int i;
-
if ((ci->values_num != 2)
|| (ci->values[0].type != OCONFIG_TYPE_STRING)
|| (ci->values[1].type != OCONFIG_TYPE_STRING)) {
return -1;
}
- listener = (listener_t *)realloc(listeners,
- (listeners_num + 1) * sizeof(*listeners));
- if (!listener) {
- ERROR("grpc: Failed to allocate listeners");
- return -1;
- }
- listeners = listener;
- listener = listeners + listeners_num;
- listeners_num++;
+ auto listener = Listener();
+ listener.addr = grpc::string(ci->values[0].value.string);
+ listener.port = grpc::string(ci->values[1].value.string);
+ listener.ssl = nullptr;
- listener->addr = strdup(ci->values[0].value.string);
- listener->port = strdup(ci->values[1].value.string);
+ auto ssl_opts = new(grpc::SslServerCredentialsOptions);
+ grpc::SslServerCredentialsOptions::PemKeyCertPair pkcp = {};
+ bool use_ssl = false;
- for (i = 0; i < ci->children_num; i++) {
+ for (int i = 0; i < ci->children_num; i++) {
oconfig_item_t *child = ci->children + i;
- WARNING("grpc: Option `%s` not allowed in <%s> block.",
- child->key, ci->key);
+
+ if (!strcasecmp("EnableSSL", child->key)) {
+ if (cf_util_get_boolean(child, &use_ssl)) {
+ ERROR("grpc: Option `%s` expects a boolean value",
+ child->key);
+ return -1;
+ }
+ }
+ else if (!strcasecmp("SSLRootCerts", child->key)) {
+ char *certs = NULL;
+ if (cf_util_get_string(child, &certs)) {
+ ERROR("grpc: Option `%s` expects a string value",
+ child->key);
+ return -1;
+ }
+ ssl_opts->pem_root_certs = read_file(certs);
+ }
+ else if (!strcasecmp("SSLServerKey", child->key)) {
+ char *key = NULL;
+ if (cf_util_get_string(child, &key)) {
+ ERROR("grpc: Option `%s` expects a string value",
+ child->key);
+ return -1;
+ }
+ pkcp.private_key = read_file(key);
+ }
+ else if (!strcasecmp("SSLServerCert", child->key)) {
+ char *cert = NULL;
+ if (cf_util_get_string(child, &cert)) {
+ ERROR("grpc: Option `%s` expects a string value",
+ child->key);
+ return -1;
+ }
+ pkcp.cert_chain = read_file(cert);
+ }
+ else {
+ WARNING("grpc: Option `%s` not allowed in <%s> block.",
+ child->key, ci->key);
+ }
}
+ ssl_opts->pem_key_cert_pairs.push_back(pkcp);
+ if (use_ssl)
+ listener.ssl = ssl_opts;
+ else
+ delete(ssl_opts);
+
+ listeners.push_back(listener);
return 0;
} /* c_grpc_config_listen() */
projects / collectd.git / blobdiff