Failed to create rrd directory: /var/lib/rrdcached/db

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1

Since update 23.11.0, we have the following message on all of our devices :
Failed to create rrd directory: /var/lib/rrdcached/db

We have a dedicated RRD server, Pollers servers and a Librenms server.

All is ok after a validate.php

On the Librenms server :

~$ ./validate.php
===========================================
Component | Version
--------- | -------
LibreNMS  | 23.11.0-54-gb4a61636c (2023-12-19T22:45:39+01:00)
DB Schema | 2023_12_15_105529_access_points_nummonbssid_integer (276)
PHP       | 8.1.22
Python    | 3.7.3
Database  | MariaDB 10.3.39-MariaDB-0+deb10u1
RRDTool   | 1.7.1
SNMP      | 5.7.3
===========================================

[OK]    Composer Version: 2.6.6
[OK]    Dependencies up-to-date.
[OK]    Database connection successful
[OK]    Database Schema is current
[OK]    SQL Server meets minimum requirements
[OK]    lower_case_table_names is enabled
[OK]    MySQL engine is optimal
[OK]    Database and column collations are correct
[OK]    Database schema correct
[OK]    MySQl and PHP time match
[OK]    Distributed Polling setting is enabled globally
[OK]    Connected to rrdcached
[OK]    Active pollers found
[OK]    Dispatcher Service not detected
[OK]    Locks are functional
[OK]    Python poller wrapper is polling
[OK]    Redis is unavailable
[OK]    rrdtool version ok
[OK]    Connected to rrdcached

Thank for your help

2

I’d suggest going through the install docs for rrdcached on docs.librenms.org. We don’t use /var/lib/rrdcached/db as the recommended directory for rrd files and without your config files it’s hard to say what to do.

3

Hi,

Before the update 23.11.0 we don’t have any problem with this configuration.

Here you are the RRDChached server config file (/etc/default/rrdcached) :

# /etc/default file for RRD cache daemon

# Full path to daemon
DAEMON=/usr/bin/rrdcached

# Optional override flush interval, in seconds.
WRITE_TIMEOUT=1800

# Optional override maximum write delay, in seconds.
WRITE_JITTER=1800

# Optional override number of write_threads
#WRITE_THREADS=4

# Where database files are placed.  If left unset, the default /tmp will
# be used.  NB: The daemon will reject a directory that has symlinks as
# components.  NB: You may want to have -B in BASE_OPTS.
BASE_PATH=/var/lib/rrdcached/db/

# Where journal files are placed.  If left unset, journaling will
# be disabled.
JOURNAL_PATH=/var/lib/rrdcached/journal/

# FHS standard placement for process ID file.
PIDFILE=/var/run/rrdcached.pid

# FHS standard placement for local control socket.
SOCKFILE=/var/run/rrdcached.sock

# Optional override group that should own/access the local control
# socket
#SOCKGROUP=root

# Optional override access mode of local control socket.
#SOCKMODE=0660

# Optional unprivileged group to run under when daemon.  If unset
# retains invocation group privileges.
#DAEMON_GROUP=_rrdcached

# Optional unprivileged user to run under when daemon.  If unset
# retains invocation user privileges.
#DAEMON_USER=_rrdcached

# Network socket address requests.  Use in conjunction with SOCKFILE to
# also listen on INET domain sockets.  The option is a lower-case ell
# ASCII 108 = 0x6c, and should be repeated for each address.  The
# parameter is an optional IP address, followed by an optional port with
# a colon separating it from the address.  The empty string is
# interpreted as "open sockets on the default port on all available
# interfaces", but generally does not pass through init script functions
# so use -L with no parameters for that configuration.
NETWORK_OPTIONS="-L"

# Any other options not specifically supported by the script (-P, -f,
# -F, -B).
BASE_OPTIONS="-B -F -R"

I want to specify that graphs still work today, we only have this message since the update.

I haven’t use the librenms folder, user and group because we only have RRDCached service installed on this server.

Thank’s
(Sorry for my english, I’m frenchy :sweat_smile:)

4

Your English is good :slight_smile:

I’d definitely recommend checking against our install docs, things like DAEMON_USER and DAEMON_GROUP aren’t configured in your config file then you’d need to make sure permissions are all set correctly: RRDCached - LibreNMS Docs

5

We have the same issue since the upgrade to 23.11. I already created an issue on gitHub, but no one has addressed it yet.

6

Hi,

We have work on config file this morning but we haven’t find any error.

But we have tried to create the /var/lib/rrdcached/db and /var/lib/rrdcached/journal on all of our pollers for user and group librenms. Since the log line Failed to create rrd directory: /var/lib/rrdcached/db/<ip_address>/ doesn’t appeart anymore. Any data are write on theses folders but it’s look like they are need.

It’s look like a script error…

I hope it can help (and revised on future version)

Thank’s for your help !

7

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