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doc, tools: Update to code to show example MAX_FDS

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Place in the code the ability for end operators to know how
to modify MAX_FDS so that they can run large scale operations.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp 2019-05-24 08:04:33 -04:00
parent 6c19478a3b
commit 610b53283b
2 changed files with 28 additions and 15 deletions
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35
doc/user/setup.rst
View File

@ -6,8 +6,8 @@ Basic Setup
After installing FRR, some basic configuration must be completed before it is
ready to use.
Daemons File
------------
Daemons Configuration File
--------------------------
After a fresh install, starting FRR will do nothing. This is because daemons
must be explicitly enabled by editing a file in your configuration directory.
This file is usually located at :file:`/etc/frr/daemons` and determines which
@ -34,19 +34,6 @@ systemd. The file initially looks like this:
bfdd=no
fabricd=no
To enable a particular daemon, simply change the corresponding 'no' to 'yes'.
Subsequent service restarts should start the daemon.
Daemons Configuration File
--------------------------
There is another file that controls the default options passed to daemons when
starting FRR as a service. This file is located in your configuration
directory, usually at :file:`/etc/frr/daemons`.
This file has several parts. Here is an example:
::
#
# If this option is set the /etc/init.d/frr script automatically loads
# the config via "vtysh -b" when the servers are started.
@ -71,6 +58,7 @@ This file has several parts. Here is an example:
bfdd_options=" --daemon -A 127.0.0.1"
fabricd_options=" --daemon -A 127.0.0.1"
#MAX_FDS=1024
# The list of daemons to watch is automatically generated by the init script.
#watchfrr_options=""
@ -83,6 +71,13 @@ This file has several parts. Here is an example:
Breaking this file down:
::
bgpd=yes
To enable a particular daemon, simply change the corresponding 'no' to 'yes'.
Subsequent service restarts should start the daemon.
::
vtysh_enable=yes
@ -91,6 +86,16 @@ As the comment says, this causes :ref:`VTYSH <vty-shell>` to apply
configuration when starting the daemons. This is useful for a variety of
reasons touched on in the VTYSH documentation and should generally be enabled.
::
MAX_FDS=1024
This allows the operator to control the number of open file descriptors
each daemon is allowed to start with. The current assumed value on
most operating systems is 1024. If the operator plans to run bgp with
several thousands of peers than this is where we would modify FRR to
allow this to happen.
::
zebra_options=" -s 90000000 --daemon -A 127.0.0.1"

8
tools/etc/frr/daemons
View File

@ -56,6 +56,14 @@ bfdd_options=" -A 127.0.0.1"
fabricd_options="-A 127.0.0.1"
vrrpd_options=" -A 127.0.0.1"
#
# This is the maximum number of FD's that will be available.
# Upon startup this is read by the control files and ulimit
# is called. Uncomment and use a reasonable value for your
# setup if you are expecting a large number of peers in
# say BGP.
#MAX_FDS=1024
# The list of daemons to watch is automatically generated by the init script.
#watchfrr_options=""