Apache service not starting

We do not support any modification of our config files (e.g. apache, .profile etc.). If you do that and the site is broken, you will run out of support, especially on the Checkmk Appliance.

We saw the bottom error several times especially when dealing with check_sql.

Error Messages

Starting apache...apache2: Syntax error on line 236 of /omd/sites/mysite/etc/apache/apache.conf
libpython3.9.so.1.0: cannot open shared object file: No such file or directory

Problem

The default for LD_LIBARY_PATH should be:

LD_LIBRARY_PATH=$OMD_ROOT/local/lib:$OMD_ROOT/lib

But for some reasons the .profile file of the site user seems to be broken and after the restart of the site you will face the following issue:

Starting apache...apache2: Syntax error on line 236 of /omd/sites/mysite/etc/apache/apache.conf: Syntax error on line 2 of /omd/sites/mysite/etc/apache/conf.d/01_wsgi.conf: Cannot load /omd/sites/mysite/lib/apache/modules/mod_wsgi.so into server: libpython3.9.so.1.0: cannot open shared object file: No such file or directory
..........ERROR

Solution

Check if env is right
```
su - mysite  
OMD[mysite]:~$ echo $LD_LIBRARY_PATH
/omd/sites/mysite/opt/oracle/instantclient_21_4
```
In that case the env is not correct. The env is pointing only to the libraries of the oracle instantclient
Check if the libary is available
```
OMD[mysite]:~$ find -L -name "*libpython3.9.so.1.0*"
./version/lib/libpython3.9.so.1.0
./lib/libpython3.9.so.1.0
```
In that case, the library is only available in the origin and default path of LD_LIBRARY_PATH
restore the default variable
You will find the original files of .profile or .bashrc in "/omd/versions/2.1.0b7.cee/skel"
```
➜ /omd/versions/2.1.0b7.cee/skel ls -altr
insgesamt 36
-rw-r--r-- 1 root root 2055 Apr 25 00:02 .profile
-rw-r--r-- 1 root root 1091 Apr 25 00:02 .bashrc
```
One way would be to copy the LD_LIBRARY_PATH value from .profile and put it directly to the .profile of the site user:
```
su - mysite
OMD[mysite]:~$ vi .profile 
```
and to make the changes permanent, please enter:
```
OMD[mysite]:~$ source .profile 
```

set the LD_LIBARY_PATH the right way

OMD[mysite]:~$ vi .profile 
OMD[mysite]:~$ source .profile

extend the LD_LIBRARY_PATH like that ":path/to/oracle/instanclient"
At the end it should look like that:

OMD[mysite]:~$ echo $LD_LIBRARY_PATH
/omd/sites/mysite/local/lib:/omd/sites/test/lib:path/to/oracle/instanclient

Now after a restart of the site apache the error should be gone!

Error Messages

Problem

Solution

Check if env is right

set the LD_LIBARY_PATH the right way

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