I would try 'mkdir /home/weewx/public_html/forecast' so the parent
directory exists when weewx tries to write it.
I'd also add that doing it your way means your NOAA files will be recreated
every time it boots, which could take ages if you have many years of info
like many of us do.
One way would be to put something in your rc.local which runs after things
mount ala:
if [ -d /home/weewx/public_html ]
then
# prepopulate things here
mkdir /home/weewx/public_html/forecast
else
logger "error - rc.local could not mkdir for weewx"
fi
You might run into timing issues if you do too much this way since rc.local
tends to run toward the end of the startup sequence, but a quick mkdir
should work.
On Saturday, March 12, 2022 at 12:40:49 PM UTC-8 Eric K wrote:
> Currently running weewx 4.5.1 in a Raspberry Pi 3B+ with the Bullseye
> version of Raspberry Pi OS.
> For a Raspberry Pi (using a microSD card as the OS system drive) I want to
> create a ramdisk for the /home/weewx/public_html directory.
> I followed examples from various webpages on the ramdisk topic.
> What I've tried thus far doesn't fully work.
> How are others implementing this?
>
> I started by renaming my /home/weewx/public_html directory to
> /home/weewx/public_html_backup, so there would be no conflict when the
> ramdisk was created at bootup.
> Then, I put this line in the /etc/fstab file and rebooted.
> tmpfs /home/weewx/public_html tmpfs defaults,noatime,size=100M 0 0
> I tested it with sudo mount -a and the new partition was visible by using
> the df command.
>
> After a reboot, a /home/weewx/public_html directory was created as a tmpfs
> volume.
> To test the functionality, I manually ran wee_reports to force the webpage
> to be created.
> When wee_reports ran, the process crashed with errors, because some of the
> files don't exist from previous runs of wee_reports.
>
> pi@rpi3b:/home/weewx $ sudo bin/wee_reports
> Using configuration file /home/weewx/weewx.conf
> Generating for all time
> Traceback (most recent call last):
> File "/home/weewx/bin/user/belchertown.py", line 1390, in
> get_extension_list
> with open(forecast_file, "wb+") as file:
> FileNotFoundError: [Errno 2] No such file or directory:
> '/home/weewx/public_html/json/forecast.json'
>
> During handling of the above exception, another exception occurred:
>
> Traceback (most recent call last):
> File "/home/weewx/bin/weewx/reportengine.py", line 196, in run
> obj.start()
> File "/home/weewx/bin/weewx/reportengine.py", line 281, in start
> self.run()
> File "/home/weewx/bin/weewx/cheetahgenerator.py", line 152, in run
> ngen = self.generate(gen_dict[section_name], self.gen_ts)
> File "/home/weewx/bin/weewx/cheetahgenerator.py", line 222, in generate
> ngen += self.generate(section[subsection], gen_ts)
> File "/home/weewx/bin/weewx/cheetahgenerator.py", line 222, in generate
> ngen += self.generate(section[subsection], gen_ts)
> File "/home/weewx/bin/weewx/cheetahgenerator.py", line 310, in generate
> searchList = self._getSearchList(encoding, timespan,
> File "/home/weewx/bin/weewx/cheetahgenerator.py", line 387, in
> _getSearchList
> searchList += obj.get_extension_list(timespan, db_lookup)
> File "/home/weewx/bin/user/belchertown.py", line 1399, in
> get_extension_list
> raise Warning(
> Warning: Error writing forecast info to
> /home/weewx/public_html/json/forecast.json. Reason: [Errno 2] No such file
> or directory: '/home/weewx/public_html/json/forecast.json'
>
> I found that if I copy the contents of my /home/weewx/public_html_backup
> folder into the /home/weewx/public_html ramdisk, then wee_reports completes
> and creates the fully populated /home/weewx/public_html directory.
>
> Is everyone else populating the ramdisk with a backup of the puclic_html
> folder at bootup time?
>
> Thanks,
> Eric
>
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