mirror of
https://github.com/ceph/ceph
synced 2024-12-22 19:34:30 +00:00
107 lines
3.4 KiB
ReStructuredText
107 lines
3.4 KiB
ReStructuredText
=================
|
|
Troubleshooting
|
|
=================
|
|
|
|
|
|
HTTP Request Errors
|
|
===================
|
|
|
|
Examining the access and error logs for the web server itself is
|
|
probably the first step in identifying what is going on. If there is
|
|
a 500 error, that usually indicates a problem communicating with the
|
|
``radosgw`` daemon. Ensure the daemon is running, its socket path is
|
|
configured, and that the web server is looking for it in the proper
|
|
location.
|
|
|
|
|
|
Crashed ``radosgw`` process
|
|
===========================
|
|
|
|
If the ``radosgw`` process dies, you will normally see a 500 error
|
|
from the web server (apache, nginx, etc.). In that situation, simply
|
|
restarting radosgw will restore service.
|
|
|
|
To diagnose the cause of the crash, check the log in ``/var/log/ceph``
|
|
and/or the core file (if one was generated).
|
|
|
|
|
|
Blocked ``radosgw`` Requests
|
|
============================
|
|
|
|
If some (or all) radosgw requests appear to be blocked, you can get
|
|
some insight into the internal state of the ``radosgw`` daemon via
|
|
its admin socket. By default, there will be a socket configured to
|
|
reside in ``/var/run/ceph``, and the daemon can be queried with::
|
|
|
|
ceph --admin-daemon /var/run/ceph/client.rgw help
|
|
|
|
help list available commands
|
|
objecter_requests show in-progress osd requests
|
|
perfcounters_dump dump perfcounters value
|
|
perfcounters_schema dump perfcounters schema
|
|
version get protocol version
|
|
|
|
Of particular interest::
|
|
|
|
ceph --admin-daemon /var/run/ceph/client.rgw objecter_requests
|
|
...
|
|
|
|
will dump information about current in-progress requests with the
|
|
RADOS cluster. This allows one to identify if any requests are blocked
|
|
by a non-responsive ceph-osd. For example, one might see::
|
|
|
|
{ "ops": [
|
|
{ "tid": 1858,
|
|
"pg": "2.d2041a48",
|
|
"osd": 1,
|
|
"last_sent": "2012-03-08 14:56:37.949872",
|
|
"attempts": 1,
|
|
"object_id": "fatty_25647_object1857",
|
|
"object_locator": "@2",
|
|
"snapid": "head",
|
|
"snap_context": "0=[]",
|
|
"mtime": "2012-03-08 14:56:37.949813",
|
|
"osd_ops": [
|
|
"write 0~4096"]},
|
|
{ "tid": 1873,
|
|
"pg": "2.695e9f8e",
|
|
"osd": 1,
|
|
"last_sent": "2012-03-08 14:56:37.970615",
|
|
"attempts": 1,
|
|
"object_id": "fatty_25647_object1872",
|
|
"object_locator": "@2",
|
|
"snapid": "head",
|
|
"snap_context": "0=[]",
|
|
"mtime": "2012-03-08 14:56:37.970555",
|
|
"osd_ops": [
|
|
"write 0~4096"]}],
|
|
"linger_ops": [],
|
|
"pool_ops": [],
|
|
"pool_stat_ops": [],
|
|
"statfs_ops": []}
|
|
|
|
In this dump, two requests are in progress. The ``last_sent`` field is
|
|
the time the RADOS request was sent. If this is a while ago, it suggests
|
|
that the OSD is not responding. For example, for request 1858, you could
|
|
check the OSD status with::
|
|
|
|
ceph pg map 2.d2041a48
|
|
|
|
osdmap e9 pg 2.d2041a48 (2.0) -> up [1,0] acting [1,0]
|
|
|
|
This tells us to look at ``osd.1``, the primary copy for this PG::
|
|
|
|
ceph --admin-daemon /var/run/ceph/osd.1.asok
|
|
{ "num_ops": 651,
|
|
"ops": [
|
|
{ "description": "osd_op(client.4124.0:1858 fatty_25647_object1857 [write 0~4096] 2.d2041a48)",
|
|
"received_at": "1331247573.344650",
|
|
"age": "25.606449",
|
|
"flag_point": "waiting for sub ops",
|
|
"client_info": { "client": "client.4124",
|
|
"tid": 1858}},
|
|
...
|
|
|
|
The ``flag_point`` field indicates that the OSD is currently waiting
|
|
for replicas to respond, in this case ``osd.0``.
|