+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation. See file COPYING.
- *
- */
-
-#ifndef CEPH_MMDSBEACON_H
-#define CEPH_MMDSBEACON_H
-
-#include "messages/PaxosServiceMessage.h"
-
-#include "include/types.h"
-
-#include "mds/MDSMap.h"
-
-
-
-/**
- * Unique ID for each type of metric we can send to the mon, so that if the mon
- * knows about the IDs then it can implement special behaviour for certain
- * messages.
- */
-enum mds_metric_t {
- MDS_HEALTH_NULL = 0,
- MDS_HEALTH_TRIM,
- MDS_HEALTH_CLIENT_RECALL,
- MDS_HEALTH_CLIENT_LATE_RELEASE,
- MDS_HEALTH_CLIENT_RECALL_MANY,
- MDS_HEALTH_CLIENT_LATE_RELEASE_MANY,
- MDS_HEALTH_CLIENT_OLDEST_TID,
- MDS_HEALTH_CLIENT_OLDEST_TID_MANY,
- MDS_HEALTH_DAMAGE,
- MDS_HEALTH_READ_ONLY,
- MDS_HEALTH_SLOW_REQUEST,
- MDS_HEALTH_CACHE_OVERSIZED
-};
-
-static inline const char *mds_metric_name(mds_metric_t m)
-{
- switch (m) {
- case MDS_HEALTH_TRIM: return "MDS_TRIM";
- case MDS_HEALTH_CLIENT_RECALL: return "MDS_CLIENT_RECALL";
- case MDS_HEALTH_CLIENT_LATE_RELEASE: return "MDS_CLIENT_LATE_RELEASE";
- case MDS_HEALTH_CLIENT_RECALL_MANY: return "MDS_CLIENT_RECALL_MANY";
- case MDS_HEALTH_CLIENT_LATE_RELEASE_MANY: return "MDS_CLIENT_LATE_RELEASE_MANY";
- case MDS_HEALTH_CLIENT_OLDEST_TID: return "MDS_CLIENT_OLDEST_TID";
- case MDS_HEALTH_CLIENT_OLDEST_TID_MANY: return "MDS_CLIENT_OLDEST_TID_MANY";
- case MDS_HEALTH_DAMAGE: return "MDS_DAMAGE";
- case MDS_HEALTH_READ_ONLY: return "MDS_READ_ONLY";
- case MDS_HEALTH_SLOW_REQUEST: return "MDS_SLOW_REQUEST";
- case MDS_HEALTH_CACHE_OVERSIZED: return "MDS_CACHE_OVERSIZED";
- default:
- return "???";
- }
-}
-
-static inline const char *mds_metric_summary(mds_metric_t m)
-{
- switch (m) {
- case MDS_HEALTH_TRIM:
- return "%num% MDSs behind on trimming";
- case MDS_HEALTH_CLIENT_RECALL:
- return "%num% clients failing to respond to cache pressure";
- case MDS_HEALTH_CLIENT_LATE_RELEASE:
- return "%num% clients failing to respond to capability release";
- case MDS_HEALTH_CLIENT_RECALL_MANY:
- return "%num% MDSs have many clients failing to respond to cache pressure";
- case MDS_HEALTH_CLIENT_LATE_RELEASE_MANY:
- return "%num% MDSs have many clients failing to respond to capability "
- "release";
- case MDS_HEALTH_CLIENT_OLDEST_TID:
- return "%num% clients failing to advance oldest client/flush tid";
- case MDS_HEALTH_CLIENT_OLDEST_TID_MANY:
- return "%num% MDSs have clients failing to advance oldest client/flush tid";
- case MDS_HEALTH_DAMAGE:
- return "%num% MDSs report damaged metadata";
- case MDS_HEALTH_READ_ONLY:
- return "%num% MDSs are read only";
- case MDS_HEALTH_SLOW_REQUEST:
- return "%num% MDSs report slow requests";
- case MDS_HEALTH_CACHE_OVERSIZED:
- return "%num% MDSs report oversized cache";
- default:
- return "???";
- }
-}
-
-/**
- * This structure is designed to allow some flexibility in how we emit health
- * complaints, such that:
- * - The mon doesn't have to have foreknowledge of all possible metrics: we can
- * implement new messages in the MDS and have the mon pass them through to the user
- * (enables us to do complex checks inside the MDS, and allows mon to be older version
- * than MDS)
- * - The mon has enough information to perform reductions on some types of metric, for
- * example complaints about the same client from multiple MDSs where we might want
- * to reduce three "client X is stale on MDS y" metrics into one "client X is stale
- * on 3 MDSs" message.
- */
-struct MDSHealthMetric
-{
- mds_metric_t type;
- health_status_t sev;
- std::string message;
- std::map<std::string, std::string> metadata;
-
- void encode(bufferlist& bl) const {
- ENCODE_START(1, 1, bl);
- assert(type != MDS_HEALTH_NULL);
- ::encode((uint16_t)type, bl);
- ::encode((uint8_t)sev, bl);
- ::encode(message, bl);
- ::encode(metadata, bl);
- ENCODE_FINISH(bl);
- }
-
- void decode(bufferlist::iterator& bl) {
- DECODE_START(1, bl);
- ::decode((uint16_t&)type, bl);
- assert(type != MDS_HEALTH_NULL);
- ::decode((uint8_t&)sev, bl);
- ::decode(message, bl);
- ::decode(metadata, bl);
- DECODE_FINISH(bl);
- }
-
- bool operator==(MDSHealthMetric const &other) const
- {
- return (type == other.type && sev == other.sev && message == other.message);
- }
-
- MDSHealthMetric() : type(MDS_HEALTH_NULL), sev(HEALTH_OK) {}
- MDSHealthMetric(mds_metric_t type_, health_status_t sev_, std::string const &message_)
- : type(type_), sev(sev_), message(message_) {}
-};
-WRITE_CLASS_ENCODER(MDSHealthMetric)
-
-
-/**
- * Health metrics send by the MDS to the mon, so that the mon can generate
- * user friendly warnings about undesirable states.
- */
-struct MDSHealth
-{
- std::list<MDSHealthMetric> metrics;
-
- void encode(bufferlist& bl) const {
- ENCODE_START(1, 1, bl);
- ::encode(metrics, bl);
- ENCODE_FINISH(bl);
- }
-
- void decode(bufferlist::iterator& bl) {
- DECODE_START(1, bl);
- ::decode(metrics, bl);
- DECODE_FINISH(bl);
- }
-
- bool operator==(MDSHealth const &other) const
- {
- return metrics == other.metrics;
- }
-};
-WRITE_CLASS_ENCODER(MDSHealth)
-
-
-class MMDSBeacon : public PaxosServiceMessage {
-
- static const int HEAD_VERSION = 7;
- static const int COMPAT_VERSION = 6;
-
- uuid_d fsid;
- mds_gid_t global_id;
- string name;
-
- MDSMap::DaemonState state;
- version_t seq;
-
- mds_rank_t standby_for_rank;
- string standby_for_name;
- fs_cluster_id_t standby_for_fscid;
- bool standby_replay;
-
- CompatSet compat;
-
- MDSHealth health;
-
- map<string, string> sys_info;
-
- uint64_t mds_features;
-
- public:
- MMDSBeacon()
- : PaxosServiceMessage(MSG_MDS_BEACON, 0, HEAD_VERSION, COMPAT_VERSION),
- global_id(0), state(MDSMap::STATE_NULL), standby_for_rank(MDS_RANK_NONE),
- standby_for_fscid(FS_CLUSTER_ID_NONE), standby_replay(false),
- mds_features(0)
- { }
- MMDSBeacon(const uuid_d &f, mds_gid_t g, string& n, epoch_t les, MDSMap::DaemonState st, version_t se, uint64_t feat) :
- PaxosServiceMessage(MSG_MDS_BEACON, les, HEAD_VERSION, COMPAT_VERSION),
- fsid(f), global_id(g), name(n), state(st), seq(se),
- standby_for_rank(MDS_RANK_NONE), standby_for_fscid(FS_CLUSTER_ID_NONE),
- standby_replay(false), mds_features(feat) {
- }
-private:
- ~MMDSBeacon() override {}
-
-public:
- uuid_d& get_fsid() { return fsid; }
- mds_gid_t get_global_id() { return global_id; }
- string& get_name() { return name; }
- epoch_t get_last_epoch_seen() { return version; }
- MDSMap::DaemonState get_state() { return state; }
- version_t get_seq() { return seq; }
- const char *get_type_name() const override { return "mdsbeacon"; }
- mds_rank_t get_standby_for_rank() { return standby_for_rank; }
- const string& get_standby_for_name() { return standby_for_name; }
- const fs_cluster_id_t& get_standby_for_fscid() { return standby_for_fscid; }
- bool get_standby_replay() const { return standby_replay; }
- uint64_t get_mds_features() const { return mds_features; }
-
- CompatSet const& get_compat() const { return compat; }
- void set_compat(const CompatSet& c) { compat = c; }
-
- MDSHealth const& get_health() const { return health; }
- void set_health(const MDSHealth &h) { health = h; }
-
- void set_standby_for_rank(mds_rank_t r) { standby_for_rank = r; }
- void set_standby_for_name(string& n) { standby_for_name = n; }
- void set_standby_for_name(const char* c) { standby_for_name.assign(c); }
- void set_standby_for_fscid(fs_cluster_id_t f) { standby_for_fscid = f; }
- void set_standby_replay(bool r) { standby_replay = r; }
-
- const map<string, string>& get_sys_info() const { return sys_info; }
- void set_sys_info(const map<string, string>& i) { sys_info = i; }
-
- void print(ostream& out) const override {
- out << "mdsbeacon(" << global_id << "/" << name << " " << ceph_mds_state_name(state)
- << " seq " << seq << " v" << version << ")";
- }
-
- void encode_payload(uint64_t features) override {
- paxos_encode();
- ::encode(fsid, payload);
- ::encode(global_id, payload);
- ::encode((__u32)state, payload);
- ::encode(seq, payload);
- ::encode(name, payload);
- ::encode(standby_for_rank, payload);
- ::encode(standby_for_name, payload);
- ::encode(compat, payload);
- ::encode(health, payload);
- if (state == MDSMap::STATE_BOOT) {
- ::encode(sys_info, payload);
- }
- ::encode(mds_features, payload);
- ::encode(standby_for_fscid, payload);
- ::encode(standby_replay, payload);
- }
- void decode_payload() override {
- bufferlist::iterator p = payload.begin();
- paxos_decode(p);
- ::decode(fsid, p);
- ::decode(global_id, p);
- ::decode((__u32&)state, p);
- ::decode(seq, p);
- ::decode(name, p);
- ::decode(standby_for_rank, p);
- ::decode(standby_for_name, p);
- ::decode(compat, p);
- ::decode(health, p);
- if (state == MDSMap::STATE_BOOT) {
- ::decode(sys_info, p);
- }
- ::decode(mds_features, p);
- ::decode(standby_for_fscid, p);
- if (header.version >= 7) {
- ::decode(standby_replay, p);
- }
-
- if (header.version < 7 && state == MDSMap::STATE_STANDBY_REPLAY) {
- // Old MDS daemons request the state, instead of explicitly
- // advertising that they are configured as a replay daemon.
- standby_replay = true;
- state = MDSMap::STATE_STANDBY;
- }
- }
-};
-
-#endif
Code Review / stor4nfv.git / blobdiff