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docs: Add memcache.conf config doc

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Change-Id: I29d00e939a3842bd064382575955fa3e255242eb
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Matthew Oliver 2023-02-22 15:08:18 +11:00
parent 8778b2c132
commit 2edd3e65da
3 changed files with 78 additions and 1 deletions
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73
doc/source/config/global_memcache_config.rst Normal file
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.. _memcache-config:
-----------------------------
Global Memcache Configuration
-----------------------------
This document describes the configuration options available for the global swift memcache configuration
which usually lives under /etc/swift/memcache.conf.
Documentation for other swift configuration options can be found at
:doc:`index`.
An example memcache.conf configuration can be found at
etc/memcache.conf-sample in the source code repository.
There is only 1 configuration section available:
* :ref:`[memcache] <memcache_conf_memcache_section>`
.. _memcache_conf_memcache_section:
**********
[memcache]
**********
=========================== =============== =============================================
Option Default Description
--------------------------- --------------- ---------------------------------------------
memcache_servers 127.0.0.1:11211 Comma separated list of memcached servers
ip:port or [ipv6addr]:port
memcache_max_connections 2 Max number of connections to each memcached
server per worker
connect_timeout 0.3 Timeout for connection
pool_timeout 1.0 Timeout for pooled connection
tries 3 Number of servers to retry on failures
getting a pooled connection
io_timeout 2.0 Timeout for read and writes
error_suppression_interval 60.0 How long without an error before a server's
error count is reset. This will also be how
long before a server is reenabled after
suppression is triggered.
Set to 0 to disable error-limiting.
error_suppression_limit 10 How many errors can accumulate before a
server is temporarily ignored
item_size_warning_threshold -1 If an item size ever gets above
item_size_warning_threshold then a warning
will be logged. This can be used to alert
when memcache item sizes are getting to
their limit.
It's an absolute size in bytes. Setting the
value to 0 will warn on every memcache set.
A value of -1 disables the warning
tls_enabled False (Optional) Global toggle for TLS usage
when comunicating with the caching servers
tls_cafile (Optional) Path to a file of concatenated
CA certificates in PEM format necessary to
establish the caching server's authenticity.
If tls_enabled is False, this option is
ignored.
tls_certfile (Optional) Path to a single file in PEM
format containing the client's certificate
as well as any number of CA certificates
needed to establish the certificate's
authenticity. This file is only required
when client side authentication is
necessary. If tls_enabled is False,
this option is ignored
tls_keyfile (Optional) Path to a single file containing
the client's private key in. Otherwhise the
private key will be taken from the file
specified in tls_certfile. If tls_enabled
is False, this option is ignored
=========================== =============== =============================================

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doc/source/config/index.rst
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@ -10,6 +10,7 @@ Configuration Documentation
account_server_config.rst
container_server_config.rst
object_server_config.rst
global_memcache_config.rst
Configuration options for middleware can be found at:

5
doc/source/config/proxy_server_config.rst
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@ -211,7 +211,10 @@ client_chunk_size 65536 Chunk size to r
clients
memcache_servers 127.0.0.1:11211 Comma separated list of
memcached servers
ip:port or [ipv6addr]:port
ip:port or [ipv6addr]:port,
if this value is
empty, the memcache client will look
for a :ref:`[memcache.conf] <memcache-config>`
memcache_max_connections 2 Max number of connections to
each memcached server per
worker