daemontools cannot acquire a supervise lock

NotionCommotion · 06-06-2017, 01:12 PM

Just installed http://cr.yp.to/daemontools.html on a Raspberry Pi3. It seemed to go fine, but...

Upon executing sudo /command/svscan &, I get:

Code:

supervise: fatal: unable to acquire growfile/supervise/lock: temporary failure

Upon executing sudo sudo svc -h /service/growfile &, I get:

Code:

svc: warning: unable to control /service/growfile: supervise not running

Anyone know why?

PS. Anyone have any reasons not to use daemontools?

pan64 · 06-06-2017, 02:05 PM

looks like you can install it using apt (available in raspbian). I do not know how did you install that.

NotionCommotion · 06-06-2017, 03:20 PM

Quote:

Originally Posted by pan64

looks like you can install it using apt (available in raspbian). I do not know how did you install that.

I compiled it per http://cr.yp.to/daemontools/install.html.

I will try using apt.

Thanks

Quote:

Create a /package directory: mkdir -p /package
chmod 1755 /package
cd /package

Download daemontools-0.76.tar.gz into /package. Unpack the daemontools package: gunzip daemontools-0.76.tar
tar -xpf daemontools-0.76.tar
rm -f daemontools-0.76.tar
cd admin/daemontools-0.76

Compile and set up the daemontools programs: package/install

On BSD systems, reboot to start svscan.

scasey · 06-06-2017, 05:51 PM

Quote:

Originally Posted by NotionCommotion

Just installed http://cr.yp.to/daemontools.html on a Raspberry Pi3. It seemed to go fine, but...

Upon executing sudo /command/svscan &, I get:

Code:

supervise: fatal: unable to acquire growfile/supervise/lock: temporary failure

Upon executing sudo sudo svc -h /service/growfile &, I get:

Code:

svc: warning: unable to control /service/growfile: supervise not running

Anyone know why?

PS. Anyone have any reasons not to use daemontools?

What does

Code:

svstat /service/growfile

say?

Also, what are files/directories in /service/growfile ?

NotionCommotion · 06-06-2017, 07:43 PM

Quote:

Originally Posted by scasey

What does

Code:

svstat /service/growfile

say?

/service/growfile says /service/growfile: supervise not running.

Quote:

Originally Posted by scasey

Also, what are files/directories in /service/growfile ?

Following per http://www.nightbluefruit.com/blog/2...s-daemontools/

Code:

#!/bin/sh

while :
do
echo “I am getting bigger…” > /tmp/bigfile.txt
sleep 1
done

NotionCommotion · 06-06-2017, 08:09 PM

Quote:

Originally Posted by pan64

looks like you can install it using apt (available in raspbian). I do not know how did you install that.

To remove compiled version so I can install apt, just delete /package, /service, and /command?

scasey · 06-06-2017, 09:26 PM

Quote:

Originally Posted by NotionCommotion

/service/growfile says /service/growfile: supervise not running.

Following per http://www.nightbluefruit.com/blog/2...s-daemontools/

Code:

#!/bin/sh

while :
do
echo “I am getting bigger…” > /tmp/bigfile.txt
sleep 1
done

...and that's in a file named run, right?

Code:

/service/growfile/run

and this is all true?

Quote:

To see this in action, run ps -ef and have a look at your process list. You will see

1. A process called svsscan, which is scanning the /service directory for new processes to monitor
2. A process called “supervise growfile”, which is keeping the job writing to the file alive
^^ no...that wouldn't be there if you can't start the service...sorry...

but you should see svcscan.

Another thought: What are the permissions and ownership on the /service/growfile/ directory?

pan64 · 06-07-2017, 01:14 AM

Quote:

Originally Posted by NotionCommotion

To remove compiled version so I can install apt, just delete /package, /service, and /command?

I do not know, I would first check the content. Probably yes.

NotionCommotion · 06-07-2017, 07:06 AM

Quote:

Originally Posted by scasey

...and that's in a file named run, right?

Code:

/service/growfile/run

Yes

Quote:

Originally Posted by scasey

and this is all true?

but you should see svcscan.

No, I did not see any.

Quote:

Originally Posted by scasey

Another thought: What are the permissions and ownership on the /service/growfile/ directory?

Probably root, but don't know for sure. I've since deleted, and used apt, and all is working.

Thanks all!