gdb如何调试ceph的radosgw

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#gdb调试 rgw

修改gdb配置，设置为保存历史命令，p变量美化输出等

[root@ceph04 src]# cat ~/.gdbinitset history save on    set print pretty onset pagination offset confirm off

切换到ceph04（10.254.3.81）的/home/yuliyang/ceph/src [root@ceph04 src]# pwd /home/yuliyang/ceph/src 使用vstart方式启动一个集群

./vstart.sh -d -n -X -r --short

创建admin用户

./radosgw-admin user create --uid=admin --display-name=admin --access-key=admin --secret=admin

rgw在8000端口 ps查看进程号

[root@ceph04 src]# ps aux|grep cephroot     10486  1.5  0.1 404376 201076 pts/2   Sl   11:40   1:22 ./ceph-mon -i a -c /home/yuliyang/ceph/src/ceph.confroot     10501  0.9  0.1 413592 202224 pts/2   Sl   11:40   0:54 ./ceph-mon -i b -c /home/yuliyang/ceph/src/ceph.confroot     10520  0.9  0.1 413592 201968 pts/2   Sl   11:40   0:51 ./ceph-mon -i c -c /home/yuliyang/ceph/src/ceph.confroot     10854  0.6  0.1 899744 226972 ?       Ssl  11:40   0:35 ./ceph-osd -i 0 -c /home/yuliyang/ceph/src/ceph.confroot     11067  0.6  0.1 899748 226280 ?       Ssl  11:40   0:34 ./ceph-osd -i 1 -c /home/yuliyang/ceph/src/ceph.confroot     11304  0.5  0.1 898720 222624 ?       Ssl  11:40   0:31 ./ceph-osd -i 2 -c /home/yuliyang/ceph/src/ceph.confroot     11634  0.0  0.1 351560 157888 ?       Ssl  11:40   0:01 ./ceph-mds -i a -c /home/yuliyang/ceph/src/ceph.confroot     11723  0.0  0.1 383336 164808 ?       Ssl  11:40   0:03 ./ceph-mds -i b -c /home/yuliyang/ceph/src/ceph.confroot     11826  0.0  0.1 351556 158000 ?       Ssl  11:40   0:01 ./ceph-mds -i c -c /home/yuliyang/ceph/src/ceph.confroot     12282  0.1  0.1 12470764 209416 ?     Ssl  11:40   0:05 /home/yuliyangceph/src/.libs/lt-radosgw -c /home/yuliyang/ceph/src/ceph.conf --log-file=/home/yuliyang/ceph/src/out/rgw.log --debug-rgw=20 --debug-ms=1root     22717  0.0  0.0 112648   952 pts/2    S+   13:11   0:00 grep --color=auto ceph

attach进程

gdb  attach  12282

打断点

(gdb) b process_requestBreakpoint 1 at 0x7f465253ea20: file rgw/rgw_process.cc, line 37.(gdb) b rgw/rgw_process.cc:38Breakpoint 2 at 0x7f465253ea2f: file rgw/rgw_process.cc, line 38.(gdb) b rgw/rgw_process.cc:39Breakpoint 3 at 0x7f465253ea39: file rgw/rgw_process.cc, line 39.

运行

(gdb) cContinuing.[New Thread 0x7f462c7f8700 (LWP 23422)][Thread 0x7f463c1ae700 (LWP 21983) exited][Thread 0x7f463c5b2700 (LWP 21980) exited][New Thread 0x7f465c472700 (LWP 23425)]

卡住在此。。。 执行创建100个桶，间隔1000s

for i in `seq 1 100`;do s3cmd -c yuliyang.s3cfg mb s3://test-$i ;sleep 1000 ;done;

在断点处停住

(gdb) cContinuing.[New Thread 0x7f462c7f8700 (LWP 23422)][Thread 0x7f463c1ae700 (LWP 21983) exited][Thread 0x7f463c5b2700 (LWP 21980) exited][New Thread 0x7f465c472700 (LWP 23425)][Switching to Thread 0x7f453affd700 (LWP 12363)]Breakpoint 1, process_request (store=0x7f465dd42840, rest=0x7ffd760c17e0, req=0x7f453affa800, client_io=0x7f453affa940, olog=0x0) at rgw/rgw_process.cc:3737      {(gdb)

ctr x a 打开tui 发现停在断点处

n下一步，继续若干n后

查看userinfo

(gdb) p userinfo$2 = {  auid = 0,   user_id = {    tenant = "",     id = ""  },   display_name = "",   user_email = "",   access_keys = std::map with 0 elements,   swift_keys = std::map with 0 elements,   subusers = std::map with 0 elements,   suspended = 0 '\000',   max_buckets = 1000,   op_mask = 7,   caps = {    caps = std::map with 0 elements  },   system = 0 '\000',   default_placement = "",   placement_tags = empty std::list,   bucket_quota = {    max_size_kb = -1,     max_objects = -1,     enabled = false,     max_size_soft_threshold = -1,     max_objs_soft_threshold = -1  },   temp_url_keys = std::map with 0 elements,   user_quota = {    max_size_kb = -1,     max_objects = -1,     enabled = false,     max_size_soft_threshold = -1,     max_objs_soft_threshold = -1  }}

list查看当前断点处周围的代码

(gdb) list56        s->obj_ctx = &rados_ctx;5758        s->req_id = store->unique_id(req->id);59        s->trans_id = store->unique_trans_id(req->id);60        s->host_id = store->host_id;6162        req->log_format(s, "initializing for trans_id = %s", s->trans_id.c_str());6364        RGWOp* op = NULL;65        int init_error = 0;

继续n执行,查看*s变量

(gdb) p *s$3 = {  cct = 0x7f465dcc5e10,   cio = 0x0,   req = 0x6,   op = OP_UNKNOWN,   op_type = RGW_OP_UNKNOWN,   content_started = false,   format = 0,   formatter = 0x0,   decoded_uri = "",   relative_uri = "",   length = 0x0,   content_length = 0,   generic_attrs = std::map with 0 elements,   err = {    http_ret = 200,     ret = 0,     s3_code = "",     message = ""  },   expect_cont = false,   header_ended = false,   obj_size = 0,   enable_ops_log = false,   enable_usage_log = false,   defer_to_bucket_acls = 0 '\000',   perm_mask = 0,   header_time = {    tv = {      tv_sec = 0,       tv_nsec = 0    }  },   account_name = "",   bucket_tenant = "",   bucket_name = "",   bucket = {    tenant = "",     name = "",     data_pool = "",     data_extra_pool = "",     index_pool = "",     marker = "",     bucket_id = "",     oid = ""  },   object = {    name = "",     instance = ""  },   src_tenant_name = "",   src_bucket_name = "",   src_object = {    name = "",     instance = ""  },   bucket_owner = {    id = {      tenant = "",       id = ""    },     display_name = ""  },   owner = {    id = {      tenant = "",       id = ""    },     display_name = ""  },   zonegroup_name = "",   zonegroup_endpoint = "",   bucket_instance_id = "",   bucket_instance_shard_id = -1,   redirect = "",   bucket_info = {    bucket = {      tenant = "",       name = "",       data_pool = "",       data_extra_pool = "",       index_pool = "",       marker = "",       bucket_id = "",       oid = ""    },     owner = {      tenant = "",       id = ""    },     flags = 0,     zonegroup = "",     creation_time = {      __d = {        __r = 0      }    },     placement_rule = "",     has_instance_obj = false,     objv_tracker = {      read_version = {        ver = 0,         tag = ""      },       write_version = {        ver = 0,         tag = ""      }    },     ep_objv = {      ver = 0,       tag = ""    },     quota = {      max_size_kb = -1,       max_objects = -1,       enabled = false,       max_size_soft_threshold = -1,       max_objs_soft_threshold = -1    },     num_shards = 0,     bucket_index_shard_hash_type = 0 '\000',     static NUM_SHARDS_BLIND_BUCKET = 4294967295,     requester_pays = false,     has_website = false,     website_conf = {      redirect_all = {        protocol = "",         hostname = "",         http_redirect_code = 0      },       index_doc_suffix = "",       error_doc = "",       routing_rules = {        rules = empty std::list      }    },     index_type = (unknown: 805334416),     swift_versioning = false,     swift_ver_location = ""  },   bucket_attrs = std::map with 0 elements,   bucket_exists = false,   has_bad_meta = false,   user = 0x7f453affa060,   bucket_acl = 0x0,   object_acl = 0x0,   system_request = false,   aws4_auth_needs_complete = false,   aws4_auth = 0x0,   canned_acl = "",   has_acl_header = false,   http_auth = 0x0,   local_source = false,   prot_flags = 0,   os_auth_token = 0x0,   swift_user = "",   swift_groups = "",   content_disp = {    override = "",     fallback = ""  },   host_id = "",   info = {    env = 0x7f453affa950,     args = {      str = "",       empty_str = "",       val_map = std::map with 0 elements,       sys_val_map = std::map with 0 elements,       sub_resources = std::map with 0 elements,       has_resp_modifier = false,       admin_subresource_added = false    },     x_meta_map = std::map with 0 elements,     host = "127.0.0.1",     method = 0x7f4530017e38 "PUT",     script_uri = "/test-1/",     请求创建的桶名字    request_uri = "/test-1/",     request_uri_aws4 = "",     effective_uri = "",     request_params = "",     domain = ""  },   init_state = {    url_bucket = "",     src_bucket = ""  },   time = {    tv = {      tv_sec = 1470979550,       tv_nsec = 592751627    }  },   obj_ctx = 0x0,   dialect = "",   req_id = "",   trans_id = ""}

查看结构体*s的其他信息

(gdb) p (*s).req_id$4 = "8e78e271-aa38-4121-bfc5-c9a74b816fc5.4115.9"(gdb) p (*s).trans_id$5 = "tx", '0' , "9-0057ad5e60-1013-default"(gdb) p (*s).host_id $6 = ""

继续n，直到get_handler函数，按s进入函数

因为是put类型

直接break退出 查看op类型是create_bucket

查看当前线程

(gdb) thread

[Current thread is 106 (Thread 0x7f4538ff9700 (LWP 12367))]

q退出

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