Image capturing: Updating Database...Failed

[Sebastian Roth]

@EStegenburgs Do you use CentOS 7 or 8? I will do a test setup and see if I can replicate the issue.

Used the settings as here: https://wiki.fogproject.org/wiki/index.php/FOG_on_an_Isolated_Network

Do you also have an isolated network setup or do you just mean you answered the installer questions similar to what we have in the wiki article?

[EStegenburgs]

@Sebastian-Roth CentOS 7. I am using the systems as described in the first post.
Also, yes, I have an isolated network in the VirtualBox environment.

[Sebastian Roth]

@EStegenburgs What exactly do you mean by “isolated network in the VirtualBox environment”? Is it set to host only, NAT, NAT network, bridged? While I don’t think any specific VM network setting can cause this issue it’s still be good to know just in case.

I’ve just done a complete fresh minimal CentOS 7 install. First I setup a VirtualBox VM with bridged network, ran the CentOS 7 installer followed by these commands:

# yum update
# sed -i.bak 's/^.*\SELINUX=enforcing\b.*$/SELINUX=permissive/' /etc/selinux/config
# systemctl stop firewalld
# systemctl disable firewalld
# reboot

Now when it’s back up I checked SELinux and firewall:

# getenforce
Permissive
# iptables -L -n -v
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Now downloaded and installed FOG:

curl -L -o 1.5.7.tar.gz https://github.com/FOGproject/fogproject/archive/1.5.7.tar.gz
tar xzf 1.5.7.tar.gz
cd fogproject-1.5.7/bin/
./installfog.sh

Following all the instructions, updated the schema and then tried to connect via FTP from localhost and from an external machine.

Listing from FileZilla connect:

Status:	Connecting to 192.168.24.130:21...
Status:	Connection established, waiting for welcome message...
Response:	220 (vsFTPd 3.0.2)
Command:	USER fogproject
Response:	331 Please specify the password.
Command:	PASS ************
Response:	230 Login successful.
Command:	SYST
Response:	215 UNIX Type: L8
Command:	FEAT
Response:	211-Features:
Response:	 EPRT
Response:	 EPSV
Response:	 MDTM
Response:	 PASV
Response:	 REST STREAM
Response:	 SIZE
Response:	 TVFS
Response:	 UTF8
Response:	211 End
Command:	OPTS UTF8 ON
Response:	200 Always in UTF8 mode.
Status:	Connected
Status:	Retrieving directory listing...
Command:	PWD
Response:	257 "/home/fogproject"
Command:	TYPE I
Response:	200 Switching to Binary mode.
Command:	PASV
Response:	227 Entering Passive Mode (192,168,24,130,22,169).
Command:	LIST
Response:	150 Here comes the directory listing.
Response:	226 Directory send OK.
Status:	Calculating timezone offset of server...
Command:	MDTM warnfogaccount.sh
Response:	213 20191201151442
Status:	Timezone offsets: Server: 0 seconds. Local: 3600 seconds. Difference: 3600 seconds.
Status:	Directory listing successful

localhost command line FTP:

Trying ::1...
ftp: connect to address ::1Connection refused
Trying 127.0.0.1...
Connected to localhost (127.0.0.1).
220 (vsFTPd 3.0.2)
Name (localhost:root): fogproject
331 Please specify the password.
Password:
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ls
227 Entering Passive Mode (127,0,0,1,148,218).
150 Here comes the directory listing.
-rwxr-xr-x    1 0        0             681 Dec 01 15:14 warnfogaccount.sh
226 Directory send OK.
ftp> 221 Goodbye.

[EStegenburgs]

@Sebastian-Roth said in Image capturing: Updating Database...Failed:

What exactly do you mean by “isolated network in the VirtualBox environment”? Is it set to host only, NAT, NAT network, bridged?

The first network adapter is NAT (enp0s3), and the second one is VM internal (enp0s8).

[EStegenburgs]

When I meant “isolated”, FOG is set up to use the internal network through the second adapter enp0s8.

[Sebastian Roth]

@EStegenburgs said:

The first network adapter is NAT (enp0s3), and the second one is VM internal (enp0s8).

So when the installer asks you about which network adapter you want to use, what did you say? I have to admit that my setup is a little different and that I have not tested it this way yet. But I remember there is an issue in the installer script with network adapter enumeration. Possibly this is causing the issue for you in the end. On the other hand I do wonder that PXE boot seems to work find then.

Do you still get the Error: Failed to retrieve directory listing when trying to connect via FTP?

[EStegenburgs]

@Sebastian-Roth What FOG installation settings did you use? It looks like you are not using FOG DHCP, in such case you would need to configure an external server for PXE boot, right? Also, did you do any vsFTPd configuration? ftp localhost on CentOS worked but I am struggling with the remote FileZilla connection.

[Sebastian Roth]

@EStegenburgs I do use the FOG DHCP and there should be no need to manually adjust vsftpd.conf.

All installer questions I answered as the are by default except for DHCP where no is default but I said yes.

[Greg Plamondon]

I had a similar problem but I found that it was my max connections.

mysql -e"show status like '%used_connections%'"
+----------------------+-------+
| Variable_name        | Value |
+----------------------+-------+
| Max_used_connections | 224   |
+----------------------+-------+

mysql -e"SHOW VARIABLES LIKE '%max_connections%'"
+-----------------------+-------+
| Variable_name         | Value |
+-----------------------+-------+
| extra_max_connections | 1     |
| max_connections       | 1000  |
+-----------------------+-------+

Mariadb max_connections default Value: 151
I increased mine to 1000 and my DB connection issues seem to have gone away.

[EStegenburgs]

@Sebastian-Roth So, in the end, I have entirely switched to a bridged network solution, and everything is working fine now. It seems that the problem was, in fact, as you mentioned, about the issue in the installer script with network adapter enumeration. But that also means it is some type of bug - all captures of an image were successful, only failed at the very end trying to update the database.

The difference that I noticed between bridged and internal NAT configuration is that in the latter one, the FOG installer script at the very beginning complains that net-tools is not installed. When it asked about the network adapters, it couldn’t get an IP at first because it tried to use a network adapter enp0s3 enp0s8 (NAT adapter for internet connection and internal NAT adapter), at which point I had to specify to use enp0s8 adapter manually.