Home » Systemd Restart=always is not honored

Systemd Restart=always is not honored

Solutons:


I would like to extend Rahul’s answer a bit.

systemd tries to restart multiple times (StartLimitBurst) and stops trying if the attempt count is reached within StartLimitIntervalSec. Both options belong to the [unit] section.

The default delay between executions is 100ms (RestartSec) which causes the rate limit to be reached very fast.

systemd won’t attempt any more automatic restarts ever for units with Restart policy defined:

Note that units which are configured for Restart= and which reach the
start limit are not attempted to be restarted anymore; however, they
may still be restarted manually at a later point, from which point on,
the restart logic is again activated.

Rahul’s answer helps, because the longer delay prevents reaching the error counter within the StartLimitIntervalSec time. The correct answer is to set both RestartSec and StartLimitBurst to reasonable values though.

Yes, there is. You can specify to retry after x seconds under [Service] section,

[Service]
Type=simple
Restart=always
RestartSec=3
ExecStart=/path/to/script

After saving the file you need to reload the daemon configurations to ensure systemd is aware of the new file,

systemctl daemon-reload

then restart the service to enable changes,

systemctl restart test

As you have requested, Looking at the documentation,

Restart=on-failure

sounds like a decent recommendation.

systemd gives up trying to restart it

No. systemd gives up trying to restart it for a little while. This is clearly shown in the log that you supply:

Jun 14 11:25:51 localhost systemd[1]: test.service: Failed with result 'start-limit'.

This is rate limiting kicking in.

The length of the little while is specified in the service unit, using the StartLimitIntervalSec= setting. The number of starts that are needed within that interval to trigger the rate limiting mechanism are specified via the StartLimitBurst= setting. If nothing on your system differs from vanilla systemd, including the defaults for these two settings, then it is 5 times within 10 seconds.

StartLimitIntervalSec=0 disables rate limiting, so systemd will retry forever rather than giving up. But making your service either not exit so often, or idle enough between exits and restarts that it does not exceed the rate limiting threshold, is a better approach.

Note that rate limiting does not care how your service exited. It triggers on the number of attempts to start/restart it, irrespective of their cause.

Further reading

  • Lennart Poettering (2013-10-07). systemd.unit. systemd manual pages. freedesktop.org.
  • Systemd’s StartLimitIntervalSec and StartLimitBurst never work

Related Solutions

Joining bash arguments into single string with spaces

[*] I believe that this does what you want. It will put all the arguments in one string, separated by spaces, with single quotes around all: str="'$*'" $* produces all the scripts arguments separated by the first character of $IFS which, by default, is a space....

AddTransient, AddScoped and AddSingleton Services Differences

TL;DR Transient objects are always different; a new instance is provided to every controller and every service. Scoped objects are the same within a request, but different across different requests. Singleton objects are the same for every object and every...

How to download package not install it with apt-get command?

Use --download-only: sudo apt-get install --download-only pppoe This will download pppoe and any dependencies you need, and place them in /var/cache/apt/archives. That way a subsequent apt-get install pppoe will be able to complete without any extra downloads....

What defines the maximum size for a command single argument?

Answers Definitely not a bug. The parameter which defines the maximum size for one argument is MAX_ARG_STRLEN. There is no documentation for this parameter other than the comments in binfmts.h: /* * These are the maximum length and maximum number of strings...

Bulk rename, change prefix

I'd say the simplest it to just use the rename command which is common on many Linux distributions. There are two common versions of this command so check its man page to find which one you have: ## rename from Perl (common in Debian systems -- Ubuntu, Mint,...

Output from ls has newlines but displays on a single line. Why?

When you pipe the output, ls acts differently. This fact is hidden away in the info documentation: If standard output is a terminal, the output is in columns (sorted vertically) and control characters are output as question marks; otherwise, the output is...

mv: Move file only if destination does not exist

mv -vn file1 file2. This command will do what you want. You can skip -v if you want. -v makes it verbose - mv will tell you that it moved file if it moves it(useful, since there is possibility that file will not be moved) -n moves only if file2 does not exist....

Is it possible to store and query JSON in SQLite?

SQLite 3.9 introduced a new extension (JSON1) that allows you to easily work with JSON data . Also, it introduced support for indexes on expressions, which (in my understanding) should allow you to define indexes on your JSON data as well. PostgreSQL has some...

Combining tail && journalctl

You could use: journalctl -u service-name -f -f, --follow Show only the most recent journal entries, and continuously print new entries as they are appended to the journal. Here I've added "service-name" to distinguish this answer from others; you substitute...

how can shellshock be exploited over SSH?

One example where this can be exploited is on servers with an authorized_keys forced command. When adding an entry to ~/.ssh/authorized_keys, you can prefix the line with command="foo" to force foo to be run any time that ssh public key is used. With this...

Why doesn’t the tilde (~) expand inside double quotes?

The reason, because inside double quotes, tilde ~ has no special meaning, it's treated as literal. POSIX defines Double-Quotes as: Enclosing characters in double-quotes ( "" ) shall preserve the literal value of all characters within the double-quotes, with the...

What is GNU Info for?

GNU Info was designed to offer documentation that was comprehensive, hyperlinked, and possible to output to multiple formats. Man pages were available, and they were great at providing printed output. However, they were designed such that each man page had a...

Set systemd service to execute after fstab mount

a CIFS network location is mounted via /etc/fstab to /mnt/ on boot-up. No, it is not. Get this right, and the rest falls into place naturally. The mount is handled by a (generated) systemd mount unit that will be named something like mnt-wibble.mount. You can...

Merge two video clips into one, placing them next to each other

To be honest, using the accepted answer resulted in a lot of dropped frames for me. However, using the hstack filter_complex produced perfectly fluid output: ffmpeg -i left.mp4 -i right.mp4 -filter_complex hstack output.mp4 ffmpeg -i input1.mp4 -i input2.mp4...

How portable are /dev/stdin, /dev/stdout and /dev/stderr?

It's been available on Linux back into its prehistory. It is not POSIX, although many actual shells (including AT&T ksh and bash) will simulate it if it's not present in the OS; note that this simulation only works at the shell level (i.e. redirection or...

How can I increase the number of inodes in an ext4 filesystem?

It seems that you have a lot more files than normal expectation. I don't know whether there is a solution to change the inode table size dynamically. I'm afraid that you need to back-up your data, and create new filesystem, and restore your data. To create new...

Why doesn’t cp have a progress bar like wget?

The tradition in unix tools is to display messages only if something goes wrong. I think this is both for design and practical reasons. The design is intended to make it obvious when something goes wrong: you get an error message, and it's not drowned in...