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丸趣 TV 小编给大家分享一下 gdb 如何调试 ceph 的 radosgw，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！
#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 ~/.gdbinit
set history save on
set print pretty on
set pagination off
set 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=adminrgw 在 8000 端口 ps 查看进程号
[root@ceph04 src]# ps aux|grep ceph
root 10486 1.5 0.1 404376 201076 pts/2 Sl 11:40 1:22 ./ceph-mon -i a -c /home/yuliyang/ceph/src/ceph.conf
root 10501 0.9 0.1 413592 202224 pts/2 Sl 11:40 0:54 ./ceph-mon -i b -c /home/yuliyang/ceph/src/ceph.conf
root 10520 0.9 0.1 413592 201968 pts/2 Sl 11:40 0:51 ./ceph-mon -i c -c /home/yuliyang/ceph/src/ceph.conf
root 10854 0.6 0.1 899744 226972 ? Ssl 11:40 0:35 ./ceph-osd -i 0 -c /home/yuliyang/ceph/src/ceph.conf
root 11067 0.6 0.1 899748 226280 ? Ssl 11:40 0:34 ./ceph-osd -i 1 -c /home/yuliyang/ceph/src/ceph.conf
root 11304 0.5 0.1 898720 222624 ? Ssl 11:40 0:31 ./ceph-osd -i 2 -c /home/yuliyang/ceph/src/ceph.conf
root 11634 0.0 0.1 351560 157888 ? Ssl 11:40 0:01 ./ceph-mds -i a -c /home/yuliyang/ceph/src/ceph.conf
root 11723 0.0 0.1 383336 164808 ? Ssl 11:40 0:03 ./ceph-mds -i b -c /home/yuliyang/ceph/src/ceph.conf
root 11826 0.0 0.1 351556 158000 ? Ssl 11:40 0:01 ./ceph-mds -i c -c /home/yuliyang/ceph/src/ceph.conf
root 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=1
root 22717 0.0 0.0 112648 952 pts/2 S+ 13:11 0:00 grep --color=auto cephattach 进程
gdb attach 12282打断点
(gdb) b process_request
Breakpoint 1 at 0x7f465253ea20: file rgw/rgw_process.cc, line 37.
(gdb) b rgw/rgw_process.cc:38
Breakpoint 2 at 0x7f465253ea2f: file rgw/rgw_process.cc, line 38.
(gdb) b rgw/rgw_process.cc:39
Breakpoint 3 at 0x7f465253ea39: file rgw/rgw_process.cc, line 39.运行
(gdb) c
Continuing.
[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) c
Continuing.
[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:37
37 {(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) list
56 s- obj_ctx = rados_ctx;
58 s- req_id = store- unique_id(req-
59 s- trans_id = store- unique_trans_id(req-
60 s- host_id = store- host_id;
62 req- log_format(s, initializing for trans_id = %s , s- trans_id.c_str());
64 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 repeats 20 times , 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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