Docker ClamAV
We have paired Docker with ClamAV®. This delivers an easy to deploy open source (GPL) anti-virus engine that can be used in variety of situations including email scanning, web scanning, and end point security.
The service runs clamd within a lightweight Alpine Linux Docker image. This provides a portable, flexible and scalable multi-threaded daemon, a command line scanner, builds with the current virus databases and runs freshclam in the background.
Usage
First, you can build the image or pull it:
Get the image
docker build -t openbridge/clamav .The easier thing to do would be to pull it:
docker pull openbridge/clamavStarting your container
Next, to run the image you can use:
docker run -d -p 3310:3310 openbridge/clamavor via a simpler (recommended!) approach is to use the included Docker compose file:
docker-compose up -dThe benefit of compose is the use of a Docker volume to hold the clam database files which allows them to persist across builds and updates.
volumes:
clamd_data:
driver: localConfiguration
There are a few different configuration files. The principle is for clamd as it governs the core behavior of the service.
Clamd
clamd is listening on exposed port 3310. We use a default configuration:
LogSyslog yes
PidFile /var/run/clamd.pid
LocalSocket /var/run/clamd.sock
FixStaleSocket true
LocalSocketGroup clamav
LocalSocketMode 666
TemporaryDirectory /tmp
DatabaseDirectory /var/lib/clamav
TCPSocket 3310
TCPAddr {{PUBLICIPV4}}
MaxConnectionQueueLength 200
MaxThreads 10
ReadTimeout 400
Foreground true
StreamMaxLength 100M
HeuristicScanPrecedence yes
StructuredDataDetection no
#StructuredSSNFormatNormal yes
ScanPE yes
ScanELF yes
DetectBrokenExecutables yes
ScanOLE2 yes
ScanPDF yes
ScanSWF yes
ScanMail yes
PhishingSignatures yes
PhishingScanURLs yes
ScanArchive yes
ArchiveBlockEncrypted no
MaxScanSize 1000M
MaxFileSize 1000M
Bytecode yes
BytecodeSecurity TrustSigned
BytecodeTimeout 240000Freshclam
freshclam is a virus database update tool for ClamAV. It is run as a background process via cron:
SHELL=/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
59 3 * * * /usr/bin/env bash -c 'freshclam --quiet' 2>&1The default configuration for freshclam:
LogSyslog yes
DatabaseMirror database.clamav.net
TestDatabases yes
ReceiveTimeout 60
ConnectTimeout 60Freshclam may be triggered by /etc/monitrc as well. See "Monitoring" below.
Virus Tests
A virus test check will run periodically via /bin/bash -c '/tests/test_virus.sh'. This is run to validate that clamd is able to scan for known virus signatures. If this test fails, then the container will restart.
The following are the test virus signature files in /tests/virus/:
clam-v2.rar
lam-v3.rar
clam.cab
clam.exe
clam.exe.bz2
clam.zip
eicar.com
multi.zip
program.doc
test.rar
test.txt
Программа.docMonitoring
Services in the container are monitored via monit. Monit is orchestrating the automated monitoring for various health and upkeep operations. For example, here are a few operations it cares for:
check process clamd-process with pidfile /run/clamav/clamd.pid
start program = "/bin/bash -c '/usr/bin/clam start'" with timeout 60 seconds
stop program = "/bin/bash -c '/usr/bin/clam stop'"
if cpu > 90% for 8 cycles then restart
if 5 restarts within 5 cycles then timeout
check program clamd-scan-check with path "/bin/bash -c '/tests/test_virus.sh'"
every 10 cycles
start program = "/bin/bash -c '/usr/bin/clam start'" with timeout 60 seconds
stop program = "/bin/bash -c '/usr/bin/clam stop'"
if status != 0 for 2 cycles then stop
check host clamd-server-port with address {{PUBLICIPV4}}
start program = "/bin/bash -c '/usr/bin/clam start'" with timeout 60 seconds
stop program = "/bin/bash -c '/usr/bin/clam stop'"
if failed port 3310 for 3 cycles then restart
check file clamd-db-main with path /var/lib/clamav/main.cvd
if timestamp > 80 hour then exec "/usr/bin/freshclam --quiet"
check file clamd-db-daily with path /var/lib/clamav/daily.cvd
if timestamp > 80 hour then exec "/usr/bin/freshclam --quiet"
check file clamd-db-bytecode with path /var/lib/clamav/bytecode.cvd
if timestamp > 80 hour then exec "/usr/bin/freshclam --quiet"Verify Status
To verify that everything is running as expected in the container you can use Monit status. The command will look something like this: docker exec -it clamd monit status. This will generate the Monit status view:
Monit 5.25.1 uptime: 0m
Process 'cron'
status OK
monitoring status Monitored
monitoring mode active
on reboot start
pid 22
parent pid 1
uid 0
effective uid 0
gid 0
uptime 0m
threads 1
children 0
cpu 0.0%
cpu total 0.0%
memory 0.0% [40 kB]
memory total 0.0% [40 kB]
security attribute (null)
disk write 0 B/s [4 kB total]
data collected Fri, 19 Oct 2018 15:59:44
Process 'clamd-process'
status OK
monitoring status Monitored
monitoring mode active
on reboot start
pid 1
parent pid 0
uid 0
effective uid 0
gid 0
uptime 0m
threads 3
children 3
cpu 0.0%
cpu total 0.0%
memory 6.8% [543.3 MB]
memory total 6.8% [543.8 MB]
security attribute (null)
disk read 0 B/s [60 kB total]
disk write 0 B/s [524 kB total]
data collected Fri, 19 Oct 2018 15:59:44
Program 'clamd-scan-check'
status OK
monitoring status Waiting
monitoring mode active
on reboot start
last exit value 0
last output + set -o nounset
+ set -o pipefail
+ source /network
++ PUBLICIPV4=172.26.0.1
++ LOCALIPV4=172.26.0.1
+ echo 'X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*
'
+ tee /tests/virus/eicar.com
+ for i in /tests/virus/*
++ clamdscan --stream /tests/virus/Eicar-Test-Signature.zip
++ grep -o FOUND
+ VIRUS_TEST=FOUND
+ '[' FOUND == FOUND ']'
+ echo 'SUCCESS: Clamd working and detecting our test file (/tests/virus/Eicar-Test-Signature.zip)'
+ for i in /tests/virus/*
++ clamdscan --stream /tests/virus/clam-v2.rar
++ grep -o FOUND
+ VIRUS_TEST=FOUND
+ '[' FOUND == FOUND ']'
+ echo 'SUCCESS: Clamd working and detecting our test file (/tests/virus/clam-v2.rar)'
+ for i in /tests/virus/*
++ clamdscan --stream /tests/virus/clam-v3.rar
++ grep -o FOU
data collected Fri, 19 Oct 2018 15:59:44
Remote Host 'clamd-server-port'
status OK
monitoring status Monitored
monitoring mode active
on reboot start
port response time 0.246 ms to 172.26.0.1:3310 type TCP/IP protocol DEFAULT
data collected Fri, 19 Oct 2018 15:59:44
File 'clamd-db-main'
status OK
monitoring status Monitored
monitoring mode active
on reboot start
permission 644
uid 100
gid 101
size 112.4 MB
access timestamp Fri, 19 Oct 2018 15:59:13
change timestamp Fri, 19 Oct 2018 15:59:08
modify timestamp Wed, 07 Jun 2017 21:38:00
data collected Fri, 19 Oct 2018 15:59:44
File 'clamd-db-daily'
status OK
monitoring status Monitored
monitoring mode active
on reboot start
permission 644
uid 100
gid 101
size 49.1 MB
access timestamp Fri, 19 Oct 2018 15:59:08
change timestamp Fri, 19 Oct 2018 15:59:08
modify timestamp Fri, 19 Oct 2018 13:00:05
data collected Fri, 19 Oct 2018 15:59:44
File 'clamd-db-bytecode'
status OK
monitoring status Monitored
monitoring mode active
on reboot start
permission 644
uid 100
gid 101
size 183.0 kB
access timestamp Fri, 19 Oct 2018 15:59:22
change timestamp Fri, 19 Oct 2018 15:59:08
modify timestamp Thu, 09 Aug 2018 00:44:01
data collected Fri, 19 Oct 2018 15:59:44
System 'be92aa06e36c'
status OK
monitoring status Monitored
monitoring mode active
on reboot start
load average [0.33] [0.21] [0.10]
cpu 0.1%us 0.1%sy 0.1%wa
memory usage 979.5 MB [12.3%]
swap usage 0 B [0.0%]
uptime 1d 3h 18m
boot time Thu, 18 Oct 2018 12:41:14
data collected Fri, 19 Oct 2018 15:59:44Versioning
Here are the latest releases:
| Docker Tag | Git Hub Release | Clamd Version | Alpine Version |
|---|---|---|---|
| latest | master | 0.103.1 | 3.13 |
TODO
Issues
If you have any problems with or questions about this image, please contact us through a GitHub issue.
Contributing
You are invited to contribute new features, fixes, or updates, large or small; we are always thrilled to receive pull requests, and do our best to process them as fast as we can.
Before you start to code, we recommend discussing your plans through a GitHub issue, especially for more ambitious contributions. This gives other contributors a chance to point you in the right direction, give you feedback on your design, and help you find out if someone else is working on the same thing.
MIT License
Copyright (c) 2018 tspicer
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.