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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