680 lines
24 KiB
C++
680 lines
24 KiB
C++
#include "osd.h"
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#include "osd_http.h"
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#include "base64.h"
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void osd_t::etcd_txn(json11::Json txn, std::function<void(std::string, json11::Json)> callback)
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{
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etcd_call("/kv/txn", txn, callback);
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}
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void osd_t::etcd_call(std::string api, json11::Json payload, std::function<void(std::string, json11::Json)> callback)
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{
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std::string req = payload.dump();
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req = "POST "+etcd_api_path+api+" HTTP/1.1\r\n"
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"Host: "+etcd_host+"\r\n"
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"Content-Type: application/json\r\n"
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"Content-Length: "+std::to_string(req.size())+"\r\n"
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"Connection: close\r\n"
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"\r\n"+req;
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http_request_json(etcd_address, req, callback);
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}
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// Startup sequence:
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// Load global OSD configuration -> Bind socket -> Acquire lease -> Report state
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// -> Load PGs -> Load peers -> Connect to peers -> Peer PGs
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// Event handling
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// Wait for PG changes -> Start/Stop PGs when requested
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// Peer connection is lost -> Reload connection data -> Try to reconnect
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void osd_t::init_cluster()
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{
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if (etcd_address == "")
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{
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if (run_primary)
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{
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// Test version of clustering code with 1 PG and 2 peers
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// Example: peers = 2:127.0.0.1:11204,3:127.0.0.1:11205
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std::string peerstr = config["peers"];
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while (peerstr.size())
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{
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int pos = peerstr.find(',');
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parse_test_peer(pos < 0 ? peerstr : peerstr.substr(0, pos));
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peerstr = pos < 0 ? std::string("") : peerstr.substr(pos+1);
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}
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if (peer_states.size() < 2)
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{
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throw std::runtime_error("run_primary requires at least 2 peers");
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}
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pgs[1] = (pg_t){
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.state = PG_PEERING,
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.pg_cursize = 0,
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.pg_num = 1,
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.target_set = { 1, 2, 3 },
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.cur_set = { 0, 0, 0 },
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};
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pgs[1].print_state();
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pg_count = 1;
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peering_state = OSD_CONNECTING_PEERS;
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}
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bind_socket();
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}
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else
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{
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peering_state = OSD_LOADING_PGS;
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load_global_config();
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}
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if (run_primary && autosync_interval > 0)
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{
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this->tfd->set_timer(autosync_interval*1000, true, [this](int timer_id)
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{
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autosync();
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});
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}
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}
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void osd_t::parse_test_peer(std::string peer)
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{
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// OSD_NUM:IP:PORT
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int pos1 = peer.find(':');
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int pos2 = peer.find(':', pos1+1);
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if (pos1 < 0 || pos2 < 0)
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throw new std::runtime_error("OSD peer string must be in the form OSD_NUM:IP:PORT");
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std::string addr = peer.substr(pos1+1, pos2-pos1-1);
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std::string osd_num_str = peer.substr(0, pos1);
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std::string port_str = peer.substr(pos2+1);
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osd_num_t peer_osd = strtoull(osd_num_str.c_str(), NULL, 10);
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if (!peer_osd)
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throw new std::runtime_error("Could not parse OSD peer osd_num");
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else if (peer_states.find(peer_osd) != peer_states.end())
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throw std::runtime_error("Same osd number "+std::to_string(peer_osd)+" specified twice in peers");
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int port = strtoull(port_str.c_str(), NULL, 10);
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if (!port)
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throw new std::runtime_error("Could not parse OSD peer port");
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peer_states[peer_osd] = json11::Json::object {
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{ "state", "up" },
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{ "addresses", json11::Json::array { addr } },
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{ "port", port },
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};
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wanted_peers[peer_osd] = { 0 };
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}
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json11::Json osd_t::get_status()
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{
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json11::Json::object st;
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st["state"] = "up";
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if (bind_address != "0.0.0.0")
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st["addresses"] = { bind_address };
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else
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st["addresses"] = getifaddr_list();
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st["port"] = listening_port;
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st["primary_enabled"] = run_primary;
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st["blockstore_enabled"] = bs ? true : false;
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return st;
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}
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json11::Json osd_t::get_statistics()
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{
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json11::Json::object st;
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timespec ts;
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clock_gettime(CLOCK_REALTIME, &ts);
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st["time"] = std::to_string(ts.tv_sec)+"."+std::to_string(ts.tv_nsec/1000000);
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st["blockstore_ready"] = bs->is_started();
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if (bs)
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{
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st["size"] = bs->get_block_count() * bs->get_block_size();
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st["free"] = bs->get_free_block_count() * bs->get_block_size();
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}
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json11::Json::object op_stats, subop_stats;
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for (int i = 0; i <= OSD_OP_MAX; i++)
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{
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op_stats[osd_op_names[i]] = json11::Json::object {
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{ "count", op_stat_count[0][i] },
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{ "sum", op_stat_sum[0][i] },
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};
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}
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for (int i = 0; i <= OSD_OP_MAX; i++)
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{
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subop_stats[osd_op_names[i]] = json11::Json::object {
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{ "count", subop_stat_count[0][i] },
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{ "sum", subop_stat_sum[0][i] },
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};
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}
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st["op_latency"] = op_stats;
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st["subop_latency"] = subop_stats;
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return st;
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}
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void osd_t::report_statistics()
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{
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json11::Json::array txn = { json11::Json::object {
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{ "request_put", json11::Json::object {
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{ "key", base64_encode(etcd_prefix+"/osd/stats/"+std::to_string(osd_num)) },
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{ "value", base64_encode(get_statistics().dump()) },
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} }
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} };
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for (auto & p: pgs)
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{
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auto & pg = p.second;
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json11::Json::array pg_state;
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for (int i = 0; i < pg_state_bit_count; i++)
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if (pg.state & pg_state_bits[i])
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pg_state.push_back(pg_state_names[i]);
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json11::Json::object pg_stats;
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pg_stats["object_count"] = pg.total_count;
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pg_stats["clean_count"] = pg.clean_count;
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pg_stats["misplaced_count"] = pg.misplaced_objects.size();
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pg_stats["degraded_count"] = pg.degraded_objects.size();
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pg_stats["incomplete_count"] = pg.incomplete_objects.size();
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pg_stats["write_osd_set"] = pg.cur_set;
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txn.push_back(json11::Json::object {
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{ "request_put", json11::Json::object {
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{ "key", base64_encode(etcd_prefix+"/pg/state/"+std::to_string(pg.pg_num)) },
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{ "value", base64_encode(json11::Json(json11::Json::object {
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{ "primary", this->osd_num },
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{ "state", pg_state },
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}).dump()) },
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{ "lease", etcd_lease_id },
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} }
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});
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txn.push_back(json11::Json::object {
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{ "request_put", json11::Json::object {
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{ "key", base64_encode(etcd_prefix+"/pg/stats/"+std::to_string(pg.pg_num)) },
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{ "value", base64_encode(json11::Json(pg_stats).dump()) },
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} }
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});
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if (pg.state == PG_ACTIVE && pg.target_history.size())
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{
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pg.target_history.clear();
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pg.all_peers = pg.target_set;
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txn.push_back(json11::Json::object {
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{ "request_delete_range", json11::Json::object {
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{ "key", base64_encode(etcd_prefix+"/pg/history/"+std::to_string(pg.pg_num)) },
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} }
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});
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}
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}
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etcd_txn(json11::Json::object { { "success", txn } }, [this](std::string err, json11::Json res)
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{
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if (err != "")
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{
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etcd_failed_attempts++;
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printf("Error reporting state to etcd: %s\n", err.c_str());
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if (etcd_failed_attempts > MAX_ETCD_ATTEMPTS)
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{
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throw std::runtime_error("Cluster connection failed");
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}
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// Retry
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tfd->set_timer(ETCD_RETRY_INTERVAL, false, [this](int timer_id)
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{
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report_statistics();
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});
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}
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else if (res["error"].string_value() != "")
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{
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printf("[OSD %lu] Error reporting state to etcd: %s\n", this->osd_num, res["error"].string_value().c_str());
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exit(1);
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}
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else
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{
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etcd_failed_attempts = 0;
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}
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});
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}
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void osd_t::load_global_config()
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{
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etcd_call("/kv/range", json11::Json::object {
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{ "key", base64_encode(etcd_prefix+"/config/osd/all") }
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}, [this](std::string err, json11::Json data)
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{
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if (err != "")
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{
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printf("Error reading OSD configuration from etcd: %s\n", err.c_str());
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tfd->set_timer(ETCD_START_INTERVAL, false, [this](int timer_id)
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{
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load_global_config();
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});
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return;
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}
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etcd_watch_revision = data["header"]["revision"].string_value();
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if (data["kvs"].array_items().size() > 0)
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{
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std::string key = base64_decode(data["kvs"][0]["key"].string_value());
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std::string json_text = base64_decode(data["kvs"][0]["value"].string_value());
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std::string json_err;
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json11::Json value = json11::Json::parse(json_text, json_err);
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if (json_err != "")
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{
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printf("Bad JSON in etcd key %s: %s (value: %s)\n", key.c_str(), json_err.c_str(), json_text.c_str());
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}
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else
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{
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blockstore_config_t osd_config = this->config;
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for (auto & cfg_var: value.object_items())
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{
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if (this->config.find(cfg_var.first) == this->config.end())
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{
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osd_config[cfg_var.first] = cfg_var.second.string_value();
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}
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}
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parse_config(osd_config);
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}
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}
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bind_socket();
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acquire_lease();
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});
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}
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// Acquire lease
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void osd_t::acquire_lease()
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{
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etcd_call("/lease/grant", json11::Json::object {
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{ "TTL", etcd_report_interval+(MAX_ETCD_ATTEMPTS*ETCD_RETRY_INTERVAL+999)/1000 }
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}, [this](std::string err, json11::Json data)
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{
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if (err != "" || data["ID"].string_value() == "")
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{
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printf("Error acquiring a lease from etcd: %s\n", err.c_str());
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tfd->set_timer(ETCD_START_INTERVAL, false, [this](int timer_id)
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{
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acquire_lease();
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});
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return;
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}
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etcd_lease_id = data["ID"].string_value();
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create_state();
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});
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printf("[OSD %lu] reporting to etcd at %s every %d seconds\n", this->osd_num, etcd_address.c_str(), etcd_report_interval);
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tfd->set_timer(etcd_report_interval*1000, true, [this](int timer_id)
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{
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renew_lease();
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});
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}
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// Report "up" state once, then keep it alive using the lease
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// Do it first to allow "monitors" check it when moving PGs
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void osd_t::create_state()
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{
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std::string state_key = base64_encode(etcd_prefix+"/osd/state/"+std::to_string(osd_num));
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etcd_txn(json11::Json::object {
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// Check that the state key does not exist
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{ "compare", json11::Json::array {
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json11::Json::object {
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{ "target", "CREATE" },
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{ "create_revision", 0 },
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{ "key", state_key },
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}
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} },
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{ "success", json11::Json::array {
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json11::Json::object {
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{ "request_put", json11::Json::object {
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{ "key", state_key },
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{ "value", base64_encode(get_status().dump()) },
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{ "lease", etcd_lease_id },
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} }
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},
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} },
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{ "failure", json11::Json::array {
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json11::Json::object {
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{ "request_range", json11::Json::object {
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{ "key", state_key },
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} }
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},
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} },
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}, [this](std::string err, json11::Json data)
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{
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if (err != "")
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{
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// FIXME Retry?
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printf("Error reporting OSD state to etcd: %s\n", err.c_str());
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exit(1);
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}
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if (data["responses"][0]["response_range"].is_object())
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{
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// OSD is already up
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auto & kv = data["responses"][0]["response_range"]["kvs"][0];
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std::string key = base64_decode(kv["key"].string_value());
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std::string json_err;
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json11::Json state = json11::Json::parse(base64_decode(kv["value"].string_value()), json_err);
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printf("Key %s already exists in etcd, OSD %lu is still up\n", key.c_str(), this->osd_num);
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int64_t port = state["port"].int64_value();
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for (auto & addr: state["addresses"].array_items())
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{
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printf(" listening at: %s:%ld\n", addr.string_value().c_str(), port);
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}
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exit(0);
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}
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if (run_primary)
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{
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load_pgs();
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}
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});
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}
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// Renew lease
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void osd_t::renew_lease()
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{
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etcd_call("/lease/keepalive", json11::Json::object {
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{ "ID", etcd_lease_id }
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}, [this](std::string err, json11::Json data)
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{
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if (err == "" && data["result"]["TTL"].string_value() == "")
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{
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// Die
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throw std::runtime_error("etcd lease has expired");
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}
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if (err != "")
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{
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etcd_failed_attempts++;
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printf("Error renewing etcd lease: %s\n", err.c_str());
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if (etcd_failed_attempts > MAX_ETCD_ATTEMPTS)
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{
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// Die
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throw std::runtime_error("Cluster connection failed");
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}
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// Retry
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tfd->set_timer(ETCD_RETRY_INTERVAL, false, [this](int timer_id)
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{
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renew_lease();
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});
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}
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else
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{
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etcd_failed_attempts = 0;
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report_statistics();
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}
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});
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}
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void osd_t::force_stop()
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{
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if (etcd_lease_id != "")
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{
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etcd_call("/kv/lease/revoke", json11::Json::object {
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{ "ID", etcd_lease_id }
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}, [this](std::string err, json11::Json data)
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{
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if (err != "")
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{
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printf("Error revoking etcd lease: %s\n", err.c_str());
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}
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printf("[OSD %lu] Force stopping\n", this->osd_num);
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exit(0);
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});
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}
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else
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{
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printf("[OSD %lu] Force stopping\n", this->osd_num);
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exit(0);
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}
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}
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void osd_t::load_pgs()
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{
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assert(this->pgs.size() == 0);
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json11::Json::array txn = {
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json11::Json::object {
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{ "request_range", json11::Json::object {
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{ "key", base64_encode(etcd_prefix+"/osd/state/"+std::to_string(osd_num)) },
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} }
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},
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json11::Json::object {
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{ "request_range", json11::Json::object {
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{ "key", base64_encode(etcd_prefix+"/config/pgs") },
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} }
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},
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json11::Json::object {
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{ "request_range", json11::Json::object {
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{ "key", base64_encode(etcd_prefix+"/pg/history/") },
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{ "range_end", base64_encode(etcd_prefix+"/pg/history0") },
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} }
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},
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};
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etcd_txn(json11::Json::object { { "success", txn } }, [this](std::string err, json11::Json data)
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{
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if (err != "")
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{
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printf("Error loading PGs from etcd: %s\n", err.c_str());
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tfd->set_timer(ETCD_START_INTERVAL, false, [this](int timer_id)
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{
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load_pgs();
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});
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return;
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}
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if (!data["responses"].array_items().size())
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{
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printf("Error loading PGs from etcd: lease expired\n");
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exit(1);
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}
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peering_state &= ~OSD_LOADING_PGS;
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json11::Json pg_config;
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std::map<pg_num_t, json11::Json> pg_history;
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bool lease_valid = false;
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for (auto & res: data["responses"].array_items())
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{
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for (auto & kvs: res["response_range"]["kvs"].array_items())
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{
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std::string key = base64_decode(kvs["key"].string_value());
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std::string json_err, json_text = base64_decode(kvs["value"].string_value());
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json11::Json value = json11::Json::parse(json_text, json_err);
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if (json_err != "")
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{
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printf("Bad JSON in etcd key %s: %s (value: %s)\n", key.c_str(), json_err.c_str(), json_text.c_str());
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}
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else if (key == etcd_prefix+"/osd/state/"+std::to_string(osd_num))
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{
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lease_valid = kvs["lease"].string_value() == etcd_lease_id;
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}
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else if (key == etcd_prefix+"/config/pgs")
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{
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pg_config = value;
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}
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else if (key.substr(0, etcd_prefix.length()+12) == etcd_prefix+"/pg/history/")
|
|
{
|
|
// <etcd_prefix>/pg/history/%d
|
|
pg_num_t pg_num = stoull_full(key.substr(etcd_prefix.length()+12));
|
|
if (pg_num)
|
|
{
|
|
pg_history[pg_num] = value;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (!lease_valid)
|
|
{
|
|
printf("Error loading PGs from etcd: lease expired\n");
|
|
exit(1);
|
|
}
|
|
parse_pgs(pg_config, pg_history);
|
|
report_statistics();
|
|
});
|
|
}
|
|
|
|
void osd_t::parse_pgs(const json11::Json & pg_config, const std::map<pg_num_t, json11::Json> & pg_history)
|
|
{
|
|
uint64_t pg_count = 0;
|
|
for (auto pg_item: pg_config.object_items())
|
|
{
|
|
pg_num_t pg_num = stoull_full(pg_item.first);
|
|
if (!pg_num)
|
|
{
|
|
throw std::runtime_error("Bad key in PG hash: "+pg_item.first);
|
|
}
|
|
auto & pg_json = pg_item.second;
|
|
osd_num_t primary_osd = pg_json["primary"].uint64_value();
|
|
if (primary_osd != 0 && primary_osd == this->osd_num)
|
|
{
|
|
// Take this PG
|
|
std::set<osd_num_t> all_peers;
|
|
std::vector<osd_num_t> target_set;
|
|
for (auto pg_osd_num: pg_json["osd_set"].array_items())
|
|
{
|
|
osd_num_t pg_osd = pg_osd_num.uint64_value();
|
|
target_set.push_back(pg_osd);
|
|
if (pg_osd != 0)
|
|
{
|
|
all_peers.insert(pg_osd);
|
|
}
|
|
}
|
|
if (target_set.size() != 3)
|
|
{
|
|
throw std::runtime_error("Bad PG "+std::to_string(pg_num)+" config format: incorrect osd_set");
|
|
}
|
|
std::vector<std::vector<osd_num_t>> target_history;
|
|
auto hist_it = pg_history.find(pg_num);
|
|
if (hist_it != pg_history.end())
|
|
{
|
|
for (auto hist_item: hist_it->second.array_items())
|
|
{
|
|
std::vector<osd_num_t> history_set;
|
|
for (auto pg_osd_num: hist_item["osd_set"].array_items())
|
|
{
|
|
osd_num_t pg_osd = pg_osd_num.uint64_value();
|
|
history_set.push_back(pg_osd);
|
|
if (pg_osd != 0)
|
|
{
|
|
all_peers.insert(pg_osd);
|
|
}
|
|
}
|
|
target_history.push_back(history_set);
|
|
}
|
|
}
|
|
this->pgs[pg_num] = (pg_t){
|
|
.state = PG_PEERING,
|
|
.pg_cursize = 0,
|
|
.pg_num = pg_num,
|
|
.all_peers = std::vector<osd_num_t>(all_peers.begin(), all_peers.end()),
|
|
.target_history = target_history,
|
|
.target_set = target_set,
|
|
};
|
|
// Add peers
|
|
for (auto pg_osd: all_peers)
|
|
{
|
|
if (pg_osd != this->osd_num && osd_peer_fds.find(pg_osd) == osd_peer_fds.end())
|
|
{
|
|
wanted_peers[pg_osd] = { 0 };
|
|
}
|
|
}
|
|
start_pg_peering(pg_num);
|
|
}
|
|
pg_count++;
|
|
}
|
|
this->pg_count = pg_count;
|
|
if (wanted_peers.size() > 0)
|
|
{
|
|
peering_state |= OSD_CONNECTING_PEERS;
|
|
}
|
|
}
|
|
|
|
void osd_t::load_and_connect_peers()
|
|
{
|
|
json11::Json::array load_peer_txn;
|
|
for (auto wp_it = wanted_peers.begin(); wp_it != wanted_peers.end();)
|
|
{
|
|
osd_num_t peer_osd = wp_it->first;
|
|
if (osd_peer_fds.find(peer_osd) != osd_peer_fds.end())
|
|
{
|
|
// It shouldn't be here
|
|
wanted_peers.erase(wp_it++);
|
|
if (!wanted_peers.size())
|
|
{
|
|
// Connected to all peers
|
|
peering_state = peering_state & ~OSD_CONNECTING_PEERS;
|
|
}
|
|
}
|
|
else if (peer_states.find(peer_osd) == peer_states.end())
|
|
{
|
|
if (!loading_peer_config && (time(NULL) - wp_it->second.last_load_attempt >= peer_connect_interval))
|
|
{
|
|
// (Re)load OSD state from etcd
|
|
wp_it->second.last_load_attempt = time(NULL);
|
|
load_peer_txn.push_back(json11::Json::object {
|
|
{ "request_range", json11::Json::object {
|
|
{ "key", base64_encode(etcd_prefix+"/osd/state/"+std::to_string(peer_osd)) },
|
|
} }
|
|
});
|
|
}
|
|
wp_it++;
|
|
}
|
|
else if (!wp_it->second.connecting &&
|
|
time(NULL) - wp_it->second.last_connect_attempt >= peer_connect_interval)
|
|
{
|
|
// Try to connect
|
|
wp_it->second.connecting = true;
|
|
const std::string addr = peer_states[peer_osd]["addresses"][wp_it->second.address_index].string_value();
|
|
int64_t peer_port = peer_states[peer_osd]["port"].int64_value();
|
|
wp_it++;
|
|
connect_peer(peer_osd, addr.c_str(), peer_port, [this](osd_num_t peer_osd, int peer_fd)
|
|
{
|
|
wanted_peers[peer_osd].connecting = false;
|
|
if (peer_fd < 0)
|
|
{
|
|
int64_t peer_port = peer_states[peer_osd]["port"].int64_value();
|
|
auto & addrs = peer_states[peer_osd]["addresses"].array_items();
|
|
const char *addr = addrs[wanted_peers[peer_osd].address_index].string_value().c_str();
|
|
printf("Failed to connect to peer OSD %lu address %s port %ld: %s\n", peer_osd, addr, peer_port, strerror(-peer_fd));
|
|
if (wanted_peers[peer_osd].address_index < addrs.size()-1)
|
|
{
|
|
// Try all addresses
|
|
wanted_peers[peer_osd].address_index++;
|
|
}
|
|
else
|
|
{
|
|
wanted_peers[peer_osd].last_connect_attempt = time(NULL);
|
|
peer_states.erase(peer_osd);
|
|
}
|
|
return;
|
|
}
|
|
printf("Connected with peer OSD %lu (fd %d)\n", clients[peer_fd].osd_num, peer_fd);
|
|
wanted_peers.erase(peer_osd);
|
|
if (!wanted_peers.size())
|
|
{
|
|
// Connected to all peers
|
|
printf("Connected to all peers\n");
|
|
peering_state = peering_state & ~OSD_CONNECTING_PEERS;
|
|
}
|
|
repeer_pgs(peer_osd);
|
|
});
|
|
}
|
|
else
|
|
{
|
|
// Skip
|
|
wp_it++;
|
|
}
|
|
}
|
|
if (load_peer_txn.size() > 0)
|
|
{
|
|
etcd_txn(json11::Json::object { { "success", load_peer_txn } }, [this](std::string err, json11::Json data)
|
|
{
|
|
// Ugly, but required to wake up the loop
|
|
tfd->set_timer(peer_connect_interval*1000, false, [](int timer_id){});
|
|
loading_peer_config = false;
|
|
if (err != "")
|
|
{
|
|
printf("Failed to load peer configuration from etcd: %s\n", err.c_str());
|
|
return;
|
|
}
|
|
for (auto & res: data["responses"].array_items())
|
|
{
|
|
if (res["response_range"]["kvs"].array_items().size())
|
|
{
|
|
std::string key = base64_decode(res["response_range"]["kvs"][0]["key"].string_value());
|
|
// <etcd_prefix>/osd/state/<osd_num>
|
|
osd_num_t peer_osd = std::stoull(key.substr(etcd_prefix.length()+11));
|
|
std::string json_err;
|
|
std::string json_text = base64_decode(res["response_range"]["kvs"][0]["value"].string_value());
|
|
json11::Json st = json11::Json::parse(json_text, json_err);
|
|
if (json_err != "")
|
|
{
|
|
printf("Bad JSON in etcd key %s: %s (value: %s)\n", key.c_str(), json_err.c_str(), json_text.c_str());
|
|
}
|
|
if (peer_osd > 0 && st.is_object() && st["state"] == "up" &&
|
|
st["addresses"].is_array() && st["port"].int64_value() > 0 && st["port"].int64_value() < 65536)
|
|
{
|
|
peer_states[peer_osd] = st;
|
|
}
|
|
}
|
|
}
|
|
});
|
|
}
|
|
}
|