Merge "[doc] add instructions regarding healthchecks"
This commit is contained in:
Zuul
Gerrit Code Review
commit
c78ce51654
|
|
@ -55,6 +55,7 @@ deployment.
|
|||
shared-file-systems-share-migration.rst
|
||||
shared-file-systems-share-replication.rst
|
||||
shared-file-systems-multi-backend.rst
|
||||
shared-file-systems-healthcheck.rst
|
||||
shared-file-systems-networking.rst
|
||||
shared-file-systems-troubleshoot.rst
|
||||
shared-file-systems-profiling.rst
|
||||
|
|
|
|||
|
|
@ -0,0 +1,141 @@
|
|||
============
|
||||
Healthchecks
|
||||
============
|
||||
|
||||
The health of a the Shared File Systems API service can be determined with
|
||||
the help of a "healthcheck" middleware. This middleware is enabled by
|
||||
default with the `api-paste`_ file that is packaged with the software. There
|
||||
is hence a ``/healthcheck`` endpoint that responds to GET requests with HTTP
|
||||
200 "OK" as the body if the API service is functional. If the API service is
|
||||
not functional, the response is HTTP 503 "Service Unavailable".
|
||||
|
||||
This ``/healthcheck`` endpoint can be polled by load balancers to determine
|
||||
service availability. The end point behaves very similar to `mod_status`
|
||||
in apache. A sample configuration that can be added to the `api-paste`_ file
|
||||
is as follows.
|
||||
|
||||
.. _api-paste: ../configuration/shared-file-systems/samples/api-paste.ini.html
|
||||
|
||||
.. code-block::
|
||||
|
||||
[app:healthcheck]
|
||||
paste.app_factory = oslo_middleware:Healthcheck.app_factory
|
||||
backends = disable_by_file
|
||||
disable_by_file_path = /etc/manila/healthcheck_disable
|
||||
detailed = False
|
||||
|
||||
Example healthcheck requests and responses:
|
||||
|
||||
.. code-block::
|
||||
|
||||
$ curl -i -X GET http://203.0.113.30/share/healthcheck
|
||||
HTTP/1.1 200 OK
|
||||
Date: Wed, 20 Mar 2024 23:00:19 GMT
|
||||
Server: Apache/2.4.52 (Ubuntu)
|
||||
Content-Type: text/plain; charset=UTF-8
|
||||
Content-Length: 2
|
||||
Connection: close
|
||||
Vary: Accept-Encoding
|
||||
|
||||
OK
|
||||
|
||||
$ curl -i -X GET http://203.0.113.30/share/healthcheck -H "Accept: application/json"
|
||||
HTTP/1.1 200 OK
|
||||
Date: Wed, 20 Mar 2024 23:01:08 GMT
|
||||
Server: Apache/2.4.52 (Ubuntu)
|
||||
Content-Type: application/json
|
||||
Content-Length: 62
|
||||
Connection: close
|
||||
|
||||
{
|
||||
"detailed": false,
|
||||
"reasons": [
|
||||
"OK"
|
||||
]
|
||||
}
|
||||
|
||||
$ curl -i -X GET http://203.0.113.30/share/healthcheck -H "Accept: text/html"
|
||||
HTTP/1.1 200 OK
|
||||
Date: Wed, 20 Mar 2024 23:02:27 GMT
|
||||
Server: Apache/2.4.52 (Ubuntu)
|
||||
Content-Type: text/html; charset=UTF-8
|
||||
Content-Length: 239
|
||||
Connection: close
|
||||
Vary: Accept-Encoding
|
||||
|
||||
<HTML>
|
||||
<HEAD><TITLE>Healthcheck Status</TITLE></HEAD>
|
||||
<BODY>
|
||||
|
||||
<H2>Result of 1 checks:</H2>
|
||||
<TABLE bgcolor="#ffffff" border="1">
|
||||
<TBODY>
|
||||
<TR>
|
||||
|
||||
<TH>
|
||||
Reason
|
||||
</TH>
|
||||
</TR>
|
||||
<TR>
|
||||
|
||||
<TD>OK</TD>
|
||||
|
||||
</TR>
|
||||
</TBODY>
|
||||
</TABLE>
|
||||
<HR></HR>
|
||||
|
||||
</BODY>
|
||||
</HTML>
|
||||
|
||||
A "detail" response can be sought if ``detailed`` is set to ``True`` in the
|
||||
``[app:healthcheck]`` section of the api paste configuration file. This
|
||||
is not done by default.
|
||||
|
||||
.. code-block::
|
||||
|
||||
$ curl -i -X GET http://203.0.113.30/share/healthcheck -H "Accept: application/json"
|
||||
HTTP/1.1 200 OK
|
||||
Date: Wed, 20 Mar 2024 23:06:19 GMT
|
||||
Server: Apache/2.4.52 (Ubuntu)
|
||||
Content-Type: application/json
|
||||
Content-Length: 4177
|
||||
Connection: close
|
||||
|
||||
{
|
||||
"detailed": true,
|
||||
"gc": {
|
||||
"counts": [
|
||||
400,
|
||||
5,
|
||||
0
|
||||
],
|
||||
"threshold": [
|
||||
700,
|
||||
10,
|
||||
10
|
||||
]
|
||||
},
|
||||
"greenthreads": [
|
||||
" File \"/opt/stack/data/venv/lib/python3.10/site-packages/paste/urlmap.py\", line 216, in __call__\n return app(environ, start_response)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/webob/dec.py\", line 129, in __call__\n resp = self.call_func(req, *args, **kw)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/webob/dec.py\", line 193, in call_func\n return self.func(req, *args, **kwargs)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/oslo_middleware/base.py\", line 121, in __call__\n response = self.process_request(req)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/webob/dec.py\", line 146, in __call__\n return self.call_func(req, *args, **kw)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/webob/dec.py\", line 193, in call_func\n return self.func(req, *args, **kwargs)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/oslo_middleware/healthcheck/__init__.py\", line 582, in process_request\n body, content_type = functor(results, healthy)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/oslo_middleware/healthcheck/__init__.py\", line 510, in _make_json_response\n body['greenthreads'] = self._get_greenstacks()\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/oslo_middleware/healthcheck/__init__.py\", line 464, in _get_greenstacks\n traceback.print_stack(gt.gr_frame, file=buf)\n"
|
||||
],
|
||||
"now": "2024-03-20 23:06:19.907279",
|
||||
"platform": "Linux-5.15.0-91-generic-x86_64-with-glibc2.35",
|
||||
"python_version": "3.10.12 (main, Nov 20 2023, 15:14:05) [GCC 11.4.0]",
|
||||
"reasons": [
|
||||
{
|
||||
"class": "HealthcheckResult",
|
||||
"details": "Path '/etc/manila/healthcheck_disable' was not found",
|
||||
"reason": "OK"
|
||||
}
|
||||
],
|
||||
"threads": [
|
||||
" File \"/usr/lib/python3.10/threading.py\", line 973, in _bootstrap\n self._bootstrap_inner()\n File \"/usr/lib/python3.10/threading.py\", line 1016, in _bootstrap_inner\n self.run()\n File \"/usr/lib/python3.10/threading.py\", line 953, in run\n self._target(*self._args, **self._kwargs)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/tooz/coordination.py\", line 208, in _beat_forever_until_stopped\n self._dead.wait(has_to_sleep_for / 2.0)\n File \"/usr/lib/python3.10/threading.py\", line 607, in wait\n signaled = self._cond.wait(timeout)\n File \"/usr/lib/python3.10/threading.py\", line 324, in wait\n gotit = waiter.acquire(True, timeout)\n",
|
||||
" File \"/opt/stack/data/venv/lib/python3.10/site-packages/paste/urlmap.py\", line 216, in __call__\n return app(environ, start_response)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/webob/dec.py\", line 129, in __call__\n resp = self.call_func(req, *args, **kw)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/webob/dec.py\", line 193, in call_func\n return self.func(req, *args, **kwargs)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/oslo_middleware/base.py\", line 121, in __call__\n response = self.process_request(req)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/webob/dec.py\", line 146, in __call__\n return self.call_func(req, *args, **kw)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/webob/dec.py\", line 193, in call_func\n return self.func(req, *args, **kwargs)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/oslo_middleware/healthcheck/__init__.py\", line 582, in process_request\n body, content_type = functor(results, healthy)\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/oslo_middleware/healthcheck/__init__.py\", line 511, in _make_json_response\n body['threads'] = self._get_threadstacks()\n File \"/opt/stack/data/venv/lib/python3.10/site-packages/oslo_middleware/healthcheck/__init__.py\", line 452, in _get_threadstacks\n traceback.print_stack(stack, file=buf)\n"
|
||||
]
|
||||
}
|
||||
|
||||
You may disable the healthcheck endpoint dynamically by creating a file called
|
||||
``/etc/manila/healthcheck_disable``. The name of this file can be customized
|
||||
with the configuration option ``disable_by_file_path`` in the
|
||||
``[app:healthcheck]`` section of the api paste configuration file.
|
||||
Loading…
Reference in New Issue