fail to install on Ubuntu 20

[Rich Painter]

I followed the instructions on http://weewx.com/docs/apt-get.htm

as root...

1. wget -qO - http://weewx.com/keys.html | sudo apt-key add -
2. wget -qO - http://weewx.com/apt/weewx.list | sudo tee /etc/apt/sources.list.d/weewx.list

3. apt-get update

4. apt-get install weewx

And this is the output of step 4:

Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
 weewx : Depends: python-configobj (>= 4.5) but it is not installable
         Depends: python-serial (>= 2.3) but it is not installable
E: Unable to correct problems, you have held broken packages.

so I tried:

 apt install python-configobj
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package python-configobj is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'python-configobj' has no installation candidate

Then this shows python3 is installed on Ubuntu 20:

# python3 --version
Python 3.8.5

Any ideas on what to do to install weewx on Ubuntu 20?

thanks

rich

[Greg from Oz]

I have a script I run but I use mysql as my database....it also installs other stuff I use as well but that shouldn't affect you.

apt install -y python3-mysqldb

apt install -y python3-usb

apt install -y python3-paho-mqtt

apt install -y python3-dateutil

apt install -y python3-ephem

apt install -y python3-configobj

apt install -y python3-cheetah

apt install -y python3-pil

apt install -y python3-serial

apt install -y python3-pip

apt install -y python3-tz

apt install -y 2to3

apt install -y python3-toolz

apt install -y python3-urllib3 

#The line below is for the decode-config.py program for backing up tasmota devices

python3 -m pip install requests configargparse

echo Install weewx

wget -qO - http://weewx.com/keys.html | sudo apt-key add -

wget -qO - http://weewx.com/apt/weewx-python3.list | sudo tee /etc/apt/sources.list.d/weewx.list

sudo apt-get update

sudo apt-get install -y weewx 

[Tim Tuck]

Hi Rich,

Which Ubuntu 20 did you install on ? server or workstation ?

I installed mine on server

1st thing....

 sudo apt update
 sudo apt upgrade -y

then I checked that python was OK

timt@metoffice:~$ python3
Python 3.8.5 (default, Jul 28 2020, 12:59:40)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
timt@metoffice:~$

then

wget -qO - http://weewx.com/keys.html | sudo apt-key add -

wget -qO - http://weewx.com/apt/weewx-python3.list | sudo tee
/etc/apt/sources.list.d/weewx.list

sudo apt install apache2
sudo apt-get install weewx

and it was good to go from there.

cheers

Tim

[Greg from Oz]

Ubuntu 20.04 doesn't have Apache2 installed by default like Ubuntu used to do when selecting a LAMP server.

It is just a generic server as far as I can tell.

[Tim Tuck]

Hi Greg,

Yes, if you build from the server ISO, its a basic server with nearly
nothing installed, it expects you to install the apps you want.

I didn't want LAMP ( which I think was a menu item ) so I just installed
Apache2 and a few other bits manually.

Building from the base server ISO is a good way to minimise the size of
the build. Its also more secure and less patches to worry about.

My server is a testing ground for my 4.x build that I will eventually
build on a Pi.

cheers

Tim

[Rich Painter]

Tim, Greg,

clean install of ubuntu mate 20.04.1 LTS Desktop, including dev tools. ssh, no apache

this installs by default python3:

Python 3.8.5  (default, Jul 28 2020, 12:59:40)
[GCC 9.3.0] on linux

all updates were run prior to attempt with weewx. then followed

1. wget -qO - http://weewx.com/keys.html | sudo apt-key add -
2. wget -qO - http://weewx.com/apt/weewx.list | sudo tee /etc/apt/sources.list.d/weewx.list

3. apt-get update

4. apt-get install weewx

where step 4 had the reported failures.

 weewx : Depends: python-configobj (>= 4.5) but it is not installable
         Depends: python-serial (>= 2.3) but it is not installable

looking at the installed python3 components, apt reports in part:

python3-configobj/focal,focal,now 5.0.6-4 all [installed,automatic]

BUT NO python3-serial !!

So, why is the installer complaining about python-configobj when ver 5.0.6-4 clearly is >= 4.5

And why is python3-serial missing from the standard python (and apparently not installable) if it is required by weewx?

I'm a C and unix guy and know nothing about python....

thanks

rich

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Richard A. Painter, P.E. Retired

[Greg from Oz]

I know nothing about python either.

The directions I used for 20.04 was here:

http://weewx.com/docs/debian.htm

That's why it says:

wget -qO - http://weewx.com/apt/weewx-python3.list | sudo tee /etc/apt/sources.list.d/weewx.list

and not 

wget -qO - http://weewx.com/apt/weewx.list | sudo tee /etc/apt/sources.list.d/weewx.list

and maybe that is why your install failed as what you were running was for python 2?

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[Tim Tuck]

Hi Rich,

Ok something weird going on there, you might like to reinstall python3

I just checked my default install and I have this...

timt@metoffice:~$ pip3 freeze|grep serial
pyserial==3.4
timt@metoffice:~$

You might like to try ...

sudo apt reinstall python3

to see if that fixes things.

cheers

Tim

[Rich Painter]

Tim, Greg,

ah

I followed the instructions at http://www.weewx.com/docs/apt-get.htm

which did NOT differentiate the python versions.

changing the repo and installing weewx now works!

Thanks!!!

rich

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[Tim Tuck]

Good catch Greg !

I wasn't paying attention to the repo Rich was pulling from.

cheers

Tim

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[Greg from Oz]

Yes there are too many instructions on how to install weewx you just have to find the right one. :-)

That's why I wrote a script to install apache2 then all the python3 stuff I need and then install weewx.

I can build a server and then just run the script which also creates the user weewx and gives the mysql permissions etc so it just works for me and I don't have to go and try to remember how I installed it last time.

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[Tom Keffer]

Sorry for that old install page! I've removed it.

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