My database connection appears to be invalid?

AngryScientist

Server

FOG Version: 1.3.0 RC19
OS: Centos 7

Client

Service Version:
OS:

Description

I got a FOG server all set up over the weekend at home, using a Dell E6520 laptop connected to my home WiFi. I believe I configured the installer to use the Ethernet NIC to be the primary interface. Everything seemed to work when browsing the localhost/fog, I could log in etc. Shut the laptop down, and took it to work, and now I get the following error when I browse to the web interface.

Your database connection appears to be invalid. FOG is unable to communicate with the database. There are many reasons why this could be the case. Please check your credentials in /var/www/html/fog/lib/fog/config.class.php. Also confirm that the database is indeed running. If credentials are correct, and if the Database service is running, check to ensure your filesystem has enough space.

Hmm check to see if database service is running. The following command has a very large output, but I do not recall what database FOG uses. MySQL? MySQL and its daemon are enabled…

sudo systemctl list-unit-files

I never did setup a database to be activated/run on startup, looking at the install guide located on the wiki here

Tom Elliott

There’s more to it than just the service running.

If the snmysqluser and snmysqlpass fields of /opt/fog/.fogsettings aren’t available the server wouldn’t be able to communicate properly which would, in turn, present this same message. If the disk is full the server wouldn’t be able to write or pull information from the database which also would return this message.

AngryScientist

Excerpt from fogsettings

snmysqluser='root'
snmysqlpass=''
snmysqlhost='localhost'

The install wiki article had no mention of setting up a password or user, and when the fog installation script asked, I selected that the password was blank. Disk space is not an issue either:

Filesystem                1K-blocks    Used Available Use% Mounted on
/dev/mapper/centos-root    20961280 4153016  16808264  20% /
devtmpfs                    3928304       0   3928304   0% /dev
tmpfs                       3943852      96   3943756   1% /dev/shm
tmpfs                       3943852    9112   3934740   1% /run
tmpfs                       3943852       0   3943852   0% /sys/fs/cgroup
/dev/sda1                   1038336  224532    813804  22% /boot
/dev/mapper/centos-images 213940160   32948 213907212   1% /images
tmpfs                        788772      48    788724   1% /run/user/1000

Tom Elliott

Is selinux set to be permissive or disabled? Or is it still set as enforcing?

sestatus

setenforce 0 (temporary fix)

Is iptables/firewalld?

systemctl status firewalld
iptables -L -n

AngryScientist

To reiterate, I followed the install guide on the wiki exactly.

selinux is set to permissive:

SELinux status:                 enabled
SELinuxfs mount:                /sys/fs/selinux
SELinux root directory:         /etc/selinux
Loaded policy name:             targeted
Current mode:                   permissive
Mode from config file:          permissive
Policy MLS status:              enabled
Policy deny_unknown status:     allowed
Max kernel policy version:      28

Status of firewalld:

 firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2016-11-08 09:43:44 EST; 1h 30min ago
 Main PID: 831 (firewalld)
   CGroup: /system.slice/firewalld.service
           └─831 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

Nov 08 09:43:39 localhost.localdomain systemd[1]: Starting firewalld - dynamic firewall daemon...
Nov 08 09:43:44 localhost.localdomain systemd[1]: Started firewalld - dynamic firewall daemon.

And now for IPtables, this one is long!

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
INPUT_direct  all  --  0.0.0.0/0            0.0.0.0/0           
INPUT_ZONES_SOURCE  all  --  0.0.0.0/0            0.0.0.0/0           
INPUT_ZONES  all  --  0.0.0.0/0            0.0.0.0/0           
ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           
REJECT     all  --  0.0.0.0/0            0.0.0.0/0            reject-with icmp-host-prohibited

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
FORWARD_direct  all  --  0.0.0.0/0            0.0.0.0/0           
FORWARD_IN_ZONES_SOURCE  all  --  0.0.0.0/0            0.0.0.0/0           
FORWARD_IN_ZONES  all  --  0.0.0.0/0            0.0.0.0/0           
FORWARD_OUT_ZONES_SOURCE  all  --  0.0.0.0/0            0.0.0.0/0           
FORWARD_OUT_ZONES  all  --  0.0.0.0/0            0.0.0.0/0           
ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           
REJECT     all  --  0.0.0.0/0            0.0.0.0/0            reject-with icmp-host-prohibited

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         
OUTPUT_direct  all  --  0.0.0.0/0            0.0.0.0/0           

Chain FORWARD_IN_ZONES (1 references)
target     prot opt source               destination         
FWDI_public  all  --  0.0.0.0/0            0.0.0.0/0           [goto] 
FWDI_public  all  --  0.0.0.0/0            0.0.0.0/0           [goto] 
FWDI_public  all  --  0.0.0.0/0            0.0.0.0/0           [goto] 

Chain FORWARD_IN_ZONES_SOURCE (1 references)
target     prot opt source               destination         

Chain FORWARD_OUT_ZONES (1 references)
target     prot opt source               destination         
FWDO_public  all  --  0.0.0.0/0            0.0.0.0/0           [goto] 
FWDO_public  all  --  0.0.0.0/0            0.0.0.0/0           [goto] 
FWDO_public  all  --  0.0.0.0/0            0.0.0.0/0           [goto] 

Chain FORWARD_OUT_ZONES_SOURCE (1 references)
target     prot opt source               destination         

Chain FORWARD_direct (1 references)
target     prot opt source               destination         

Chain FWDI_public (3 references)
target     prot opt source               destination         
FWDI_public_log  all  --  0.0.0.0/0            0.0.0.0/0           
FWDI_public_deny  all  --  0.0.0.0/0            0.0.0.0/0           
FWDI_public_allow  all  --  0.0.0.0/0            0.0.0.0/0           

Chain FWDI_public_allow (1 references)
target     prot opt source               destination         

Chain FWDI_public_deny (1 references)
target     prot opt source               destination         

Chain FWDI_public_log (1 references)
target     prot opt source               destination         

Chain FWDO_public (3 references)
target     prot opt source               destination         
FWDO_public_log  all  --  0.0.0.0/0            0.0.0.0/0           
FWDO_public_deny  all  --  0.0.0.0/0            0.0.0.0/0           
FWDO_public_allow  all  --  0.0.0.0/0            0.0.0.0/0           

Chain FWDO_public_allow (1 references)
target     prot opt source               destination         

Chain FWDO_public_deny (1 references)
target     prot opt source               destination         

Chain FWDO_public_log (1 references)
target     prot opt source               destination         

Chain INPUT_ZONES (1 references)
target     prot opt source               destination         
IN_public  all  --  0.0.0.0/0            0.0.0.0/0           [goto] 
IN_public  all  --  0.0.0.0/0            0.0.0.0/0           [goto] 
IN_public  all  --  0.0.0.0/0            0.0.0.0/0           [goto] 

Chain INPUT_ZONES_SOURCE (1 references)
target     prot opt source               destination         

Chain INPUT_direct (1 references)
target     prot opt source               destination         
ACCEPT     2    --  0.0.0.0/0            0.0.0.0/0           

Chain IN_public (3 references)
target     prot opt source               destination         
IN_public_log  all  --  0.0.0.0/0            0.0.0.0/0           
IN_public_deny  all  --  0.0.0.0/0            0.0.0.0/0           
IN_public_allow  all  --  0.0.0.0/0            0.0.0.0/0           

Chain IN_public_allow (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:21 ctstate NEW
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:137 ctstate NEW
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:138 ctstate NEW
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:139 ctstate NEW
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:445 ctstate NEW
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:80 ctstate NEW
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:443 ctstate NEW
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:111 ctstate NEW
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:111 ctstate NEW
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:20048 ctstate NEW
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:20048 ctstate NEW
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:2049 ctstate NEW
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:22 ctstate NEW
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:53 ctstate NEW
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:53 ctstate NEW
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:3306 ctstate NEW
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:67 ctstate NEW
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:69 ctstate NEW
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:4011 ctstate NEW
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpts:49152:65532 ctstate NEW

Chain IN_public_deny (1 references)
target     prot opt source               destination         

Chain IN_public_log (1 references)
target     prot opt source               destination         

Chain OUTPUT_direct (1 references)
target     prot opt source               destination

Wayne Workman

Try to access the db manually.

mysql -D fog

AngryScientist

Pulled from git for RC21, Fixed errors in the fogsettings file. During installation, a selinux alert was generated:

SELinux is preventing /usr/bin/passwd from ioctl access on the file /home/ullsadmin/git/fogproject/bin/error_logs/fog_error_1.3.0-RC-21.log.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that passwd should be allowed ioctl access on the fog_error_1.3.0-RC-21.log file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep passwd /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023
Target Context                unconfined_u:object_r:user_home_t:s0
Target Objects                /home/ullsadmin/git/fogproject/bin/error_logs/fog_
                              error_1.3.0-RC-21.log [ file ]
Source                        passwd
Source Path                   /usr/bin/passwd
Port                          <Unknown>
Host                          localhost.localdomain
Source RPM Packages           passwd-0.79-4.el7.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-60.el7_2.9.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     localhost.localdomain
Platform                      Linux localhost.localdomain
                              3.10.0-327.36.3.el7.x86_64 #1 SMP Mon Oct 24
                              16:09:20 UTC 2016 x86_64 x86_64
Alert Count                   2
First Seen                    2016-11-05 22:11:37 EDT
Last Seen                     2016-11-08 12:24:57 EST
Local ID                      b2bddb79-8259-42e5-b4d2-2b432292d6b6

Raw Audit Messages
type=AVC msg=audit(1478625897.821:682): avc:  denied  { ioctl } for  pid=5594 comm="passwd" path="/home/ullsadmin/git/fogproject/bin/error_logs/fog_error_1.3.0-RC-21.log" dev="dm-0" ino=35560553 scontext=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file


type=SYSCALL msg=audit(1478625897.821:682): arch=x86_64 syscall=ioctl success=no exit=ENOTTY a0=1 a1=5401 a2=7ffd1070e6e0 a3=7ffd1070e670 items=0 ppid=5118 pid=5594 auid=1000 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts1 ses=1 comm=passwd exe=/usr/bin/passwd subj=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 key=(null)

Hash: passwd,passwd_t,user_home_t,file,ioctl

The file was still written however, and the last few entries indicate a problem with the database as well…

--2016-11-08 12:49:27--  (try: 5)  http://10.6.6.6//fog//maintenance/backup_db.php
Connecting to 10.6.6.6:80... connected.
HTTP request sent, awaiting response...

Wayne Workman

@AngryScientist In permissive mode, SELinux generates messages as it would in enforcing, but it doesn’t take any action to block anything whatsoever. Please try what I posted below.

AngryScientist

@Wayne-Workman
Okay, sorry Wayne, your post got lost in my text walls.

[ullsadmin@localhost ~]$ mysql -D fog
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

This is beyond my knowledge…
EDIT: Restarting mysqld fixed the issue. Now I will see if it stays after reboot…
EDIT2: It does not stay, boooo.

Wayne Workman

@AngryScientist When it throws the error again, try these and see if one works:

mysql -D fog -u root -h localhost

mysql -D fog -u root -h 127.0.0.1

Wayne Workman

@AngryScientist said in My database connection appears to be invalid?:

@Wayne-Workman
Okay, sorry Wayne, your post got lost in my text walls.
[ullsadmin@localhost ~]$ mysql -D fog
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
This is beyond my knowledge…
EDIT: Restarting mysqld fixed the issue. Now I will see if it stays after reboot…
EDIT2: It does not stay, boooo.

I have the exact same error now… great.

@Tom-Elliott Moving this to bug reports.

Wayne Workman

This post is deleted!

JJ Fullmer

This sounds like a mariaDB (aka mySql) issue. And it sounds like it’s just not configured to start on startup if systemctl start mysqld.service fixes it. This article might could help.
https://mariadb.com/kb/en/mariadb/starting-and-stopping-mariadb-automatically/

I thought that the database got configured to automatically start on the apt-get/yum install.
I have cent os 7 and have never had to do any sort of configuration for fog services to run on startup.

JJ Fullmer

This post is deleted!

Wayne Workman

This post is deleted!

Wayne Workman

In centos 7 the way to start maridadb on boot is probably:
systemctl eanble mysqld

I’m still waiting to hear back on the commands I posted.

AngryScientist

@Wayne-Workman

systemctl enable mysqld

Typo correction!

I will reboot my FOG server later today and give you the results of your suggestions. Right now I am reveling in the wonders of 5GBps imagine speed. 1.2.0 on my old hardware topped out at 1.2GBps

Wayne Workman

@AngryScientist said in My database connection appears to be invalid?:

Right now I am reveling in the wonders of 5GBps imagine speed. 1.2.0 on my old hardware topped out at 1.2GBps

A lot of that has to do with the performance improvements of FOG 1.3.0 RC, a change was made to how the images are compressed and decompressed for imaging and some people reported 50 to 100% speed increases.

Tom Elliott

RC-22 Officially released.

Please update and hopefully you’ll see all the latest goodies and what not. (Hopefully this will be fixed for you too.)

AngryScientist

@Tom-Elliott
I know how to do a git pull, but what is the official upgrade procedure?

My database connection appears to be invalid?

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