1FRR-WATCHFRR(8)                       FRR                      FRR-WATCHFRR(8)
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NAME

6       frr-watchfrr - a program to monitor the status of FRRouting daemons
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SYNOPSIS

9       watchfrr [-h] [-v]
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11       watchfrr [option...] <daemon>...
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DESCRIPTION

14       watchfrr is a watchdog program that monitors the status of supplied frr
15       daemons and tries to restart them in case they become  unresponsive  or
16       shut down.
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18       To  determine  whether  a daemon is running, it tries to connect to the
19       daemon's VTY UNIX stream socket, and send echo commands to  ensure  the
20       daemon  responds.  When  the  daemon  crashes, EOF is received from the
21       socket, so that watchfrr can react immediately.
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23       In order to avoid restarting the daemons in quick succession,  you  can
24       supply  the  -m and -M options to set the minimum and maximum delay be‐
25       tween the restart commands. The minimum restart delay  is  recalculated
26       each  time  a restart is attempted.  If the time since the last restart
27       attempt exceeds twice the value of -M, the restart delay is set to  the
28       value of -m, otherwise the interval is doubled (but capped at the value
29       of -M).
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OPTIONS

32       --dry  Run watchfrr in "dry-run" mode, only  monitoring  the  specified
33              daemons but not performing any start/stop/restart actions.
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35       -d, --daemon
36              Run  in  daemon  mode. When supplied, error messages are sent to
37              Syslog instead of standard output (stdout).
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39       -S <directory>, --statedir <directory>
40              Set  the  VTY   socket   directory   (the   default   value   is
41              "/var/run/frr").
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43       -N <name>, --pathspace <name>
44              Insert  the given name into paths used by the FRR daemons.  This
45              is appended to the VTY socket directory and passed to  the  dae‐
46              mons which also add it to their paths in /etc.
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48       --netns[=<name>]
49              (Linux only.)  Switch network namespaces when starting watchfrr.
50              The name defaults to the value passed with -N (which  it  should
51              be used in conjunction with.)  If the name is not specified, the
52              option has no effect.
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54              If the network namespace does not exist, it is created in a man‐
55              ner  compatible  with  iproute2.  Network namespaces are not re‐
56              moved by FRR, this must be done with "ip netns delete".
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58       -l <level>, --loglevel <level>
59              Set the logging level (the default  value  is  "6").  The  value
60              should  range  from  0  (LOG_EMERG) to 7 (LOG_DEBUG), but higher
61              number can be supplied if extra debugging messages are required.
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63       --min-restart-interval <number>
64              Set the minimum number of seconds to wait between invocations of
65              the daemon restart commands (the default value is "60").
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67       --max-restart-interval <number>
68              Set the maximum number of seconds to wait between invocations of
69              the daemon restart commands (the default value is "600").
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71       -i <number>, --interval <number>
72              Set the status polling interval in seconds (the default value is
73              "5").
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75       -t <number>, --timeout <number>
76              Set  the  unresponsiveness timeout in seconds (the default value
77              is "10").
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79       -T <number>, --restart-timeout <number>
80              Set the restart (kill) timeout in seconds (the default value  is
81              "20").  If  any background jobs are still running after this pe‐
82              riod has elapsed, they will be killed.
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84       -p <filename>, --pid-file <filename>
85              Set the  process  identifier  filename  (the  default  value  is
86              "/var/run/frr/watchfrr.pid").
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88       -b <string>, --blank-string <string>
89              When the supplied string is found in any of the command line op‐
90              tion arguments (i.e., -r, -s, or -k), replace it with a space.
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92              This is an ugly hack to circumvent  problems  with  passing  the
93              command line arguments containing embedded spaces.
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95       -v, --version
96              Display the version information and exit.
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98       -h, --help
99              Display the usage information and exit.
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101       The  following  3 options specify scripts that watchfrr uses to perform
102       start/stop/restart actions. Reasonable default values  are  built  into
103       watchfrr, so the use of these options should no longer be necessary:
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105       -s command, --start-command command
106              Supply a Bourne shell command to start a single daemon. The com‐
107              mand string should contain the '%s' placeholder  to  be  substi‐
108              tuted with the daemon name.
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110       -k command, --kill-command command
111              Supply  a Bourne shell command to stop a single daemon. The com‐
112              mand string should contain the '%s' placeholder  to  be  substi‐
113              tuted with the daemon name.
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115       -r command, --restart command
116              Supply  a  Bourne  shell command to restart a single daemon. The
117              command string should contain the '%s' placeholder to be substi‐
118              tuted with the daemon name.
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PREVIOUS OPTIONS

121       Prior  versions  of  watchfrr supported some additional options that no
122       longer exist::
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124          -a, -A, -e, -R, -z
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126       The -a, -A and -R options were  used  to  select  alternate  monitoring
127       modes  that offered different patterns of restarting daemons. The "cor‐
128       rect" mode (phased restart) is now the default. The -e and  -z  options
129       used  to  disable  some monitoring aspects, watchfrr now always has all
130       monitoring features enabled.
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132       Removing these options should result in correct operation, if  it  does
133       not please file a bug report.
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FILES

136       /usr/lib/frr/watchfrr
137              The default location of the watchfrr binary.
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139       /etc/frr/watchfrr.conf
140              The default location of the watchfrr config file.
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142       $(PWD)/watchfrr.log
143              If  the watchfrr process is configured to output logs to a file,
144              then you will find this file in the directory where you  started
145              watchfrr.
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WARNING

148       This  man page is intended to be a quick reference for command line op‐
149       tions. The definitive document is the info file frr 7.5.1 or the  docu‐
150       mentation available on the project website at https://frrouting.org/.
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DIAGNOSTICS

153       The  daemon  may  log  to  standard output, to a VTY, to a log file, or
154       through syslog to the system logs. FRR supports many debugging options,
155       see the Info file, web docs or source for details.
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SEE ALSO

158       frr-zebra(8),   vtysh(1),   frr-ripd(8),  frr-ripngd(8),  frr-ospfd(8),
159       frr-ospf6d(8), frr-bgpd(8), frr-isisd(8), frr-babeld(8),  frr-nhrpd(8),
160       frr-pimd(8),  frr-pbrd(8),  frr-ldpd(8), frr-eigrpd(8), frr-staticd(8),
161       frr-fabricd(8), frr-vrrpd(8), mtracebis(8) https://frrouting.org/
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BUGS

164       FRR eats bugs for breakfast. If you  have  food  for  the  maintainers,
165       please email <dev@lists.frrouting.org>.
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168       2021, FRR
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1737.5.1                            Aug 04, 2021                  FRR-WATCHFRR(8)
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