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Contributed by Laurens Vets <laurens@daemon.be>.

Version 0.4.1 - September 2017.2 - January 2018

Introduction

We will be installing Metron 0.4.1 with HDP 2.5 on CentOS 7. We will also install MariaDB as a database for Metron REST. Additionally, we'll also install Apache NiFi.
I installed Metron in a test environment with 4 VMs to try it out as well as a single node. I'll try to write this guide so that the necessary steps can easily be adapted for other environments.

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  • Set up passwordless SSH between our nodes. If passwordless ssh has not yet been set up within the cluster, then in main node generate key:

    Code Block
    cat /dev/zero | ssh-keygen -q -N "" 2>/dev/null
cat .ssh/id_rsa.pub >> .ssh/authorized_keys
chmod 400 .ssh/authorized_keys

    If you're not installing on a single node, add this newly generated key to all the slave nodes:

    Code Block
    ssh-copy-id -i ~/.ssh/id_rsa.pub <replace_with_node_ip>

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  • Adjust limits to secure level ([link](https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.0/bk_installing_manually_book/content/ref-729d1fb0-6d1b-459f-a18a-b5eba4540ab5.1.html)):

    Code Block
    ulimit -n 32768
ulimit -u 65536
echo -e "* - nofile 32768\n* - nproc 65536" >> /etc/security/limits.conf

  • Disable IPv6, leaving it enabled may force service to bind to IPv6 addresses only and thus resulting in inability to connect to it ([source link](https://wiki.centos.org/FAQ/CentOS6#head-d47139912868bcb9d754441ecb6a8a10d41781df)):

    Code Block
    sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1
echo -e "\n# Disable IPv6\nnet.ipv6.conf.all.disable_ipv6 = 1\nnet.ipv6.conf.default.disable_ipv6 = 1" >> /etc/sysctl.conf

  • Disable Transparent Hugepage. Add "transparent_hugepage=never" to the end of the kernel line in "/etc/default/grub" and reboot. (Ambari demands it, do we need to comply?)

    Code Block
    # Change the line:
GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=cl/root rd.lvm.lv=cl/swap rhgb quiet"
# To:
GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=cl/root rd.lvm.lv=cl/swap rhgb quiet transparent_hugepage=never"
# Afterwards, run:
grub2-mkconfig -o /boot/grub2/grub.cfg

    After reboot check that changes were applied (make sure that word "never" is selected in square-brackets):

    Code Block
    cat /sys/kernel/mm/transparent_hugepage/enabled
always madvise [never]

    Alternatively, if you do not want to mess with kernel parameters, you can create a new systemd service which disables this on each boot. Create the file "/etc/systemd/system/disable-thp.service" with the following content:

    Code Block
    [Unit]
Description=Disable Transparent Huge Pages (THP)

[Service]
Type=simple
ExecStart=/bin/sh -c "echo 'never' > /sys/kernel/mm/transparent_hugepage/enabled && echo 'never' > /sys/kernel/mm/transparent_hugepage/defrag"

[Install]
WantedBy=multi-user.target

    Restart systemd, start the new service and make sure the new service runs at startup:

    Code Block
    # systemctl daemon-reload
# systemctl start disable-thp
# systemctl enable disable-thp

  • Disable SELinux (is a must to install Ambari and build Metron:

    Code Block
    setenforce 0
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config

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  • Download and install Maven 3.3.9:

    Code Block
    wget httphttps://archive.apache.volia.netorg/dist/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.tar.gz
tar -zxf apache-maven-3.3.9-bin.tar.gz
mv apache-maven-3.3.9 /opt
PATH=/opt/apache-maven-3.3.9/bin:$PATH
echo 'export PATH=/opt/apache-maven-3.3.9/bin:$PATH' > /etc/profile.d/maven.sh
chmod +x /etc/profile.d/maven.sh

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  • Install the database we will use for Metron REST on Master node:

    Code Block
    yum install mariadb-server -y

    Install JAVA MySQL connector on all nodes:

    Code Block
    yum install mysql-connector-java -y

Configure

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database for Metron REST

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If you haven't run `mysql_secure_installation` after the database installation, do that first:

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Code Block
systemctl start mariadb
systemctl enable mariadb
systemctl status mariadb
mysql_secure_installation

Should produce following output: 

Code Block
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!

In order to log into MySQL to secure it, we'll need the current
password for the root user.  If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

Enter current password for root (enter for none):
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.

Set root password? [Y/n]
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
 ... Success!


By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them.  This is intended only for testing, and to make the installation
go a bit smoother.  You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] n
 ... skipping.

Normally, root should only be allowed to connect from 'localhost'.  This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n]
 ... Success!
By default, MySQL comes with a database named 'test' that anyone can
access.  This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n]
 - Dropping test database...
ERROR 1008 (HY000) at line 1: Can't drop database 'test'; database doesn't exist
 ... Failed!  Not critical, keep moving...
 - Removing privileges on test database...
 ... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n]
 ... Success!

All done!  If you've completed all of the above steps, your MySQL
installation should now be secure.

Thanks for using MySQL!


Cleaning up...

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Now we are going to start building Metron code. For advanced users: there seems to be a new way of building mpack and rpms

  • Clone Metron repo and switch to 0.4.1 release:

    Code Block
    git clone https://github.com/apache/metron
cd metron
git checkout Metron_0.4.1

...

  • Enable time sync, disable firewall and SElinux on every node (I know, but for the sake of simplicity, quickness & testing, I've disabled selinux):

    Code Block
    systemctl enable ntpd
systemctl start ntpd
systemctl stop firewalld
systemctl disable firewalld
setenforce 0 (=> I know, but for the sake of simplicity, quickness & testing, I've disabled selinux.)iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -t nat -F
iptables -t mangle -F
iptables -F
iptables -X
iptables-save > /etc/sysconfig/iptables
systemctl stop firewalld
systemctl disable firewalld
setenforce 0

    Also, if you are using CentOS 7 and Python 2.7.5 and above you will encounter an error during ambari agent install in Ambari UI:

    Code Block
    [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:579)

    To fix it disable cert check in Python like this (reference link):

    Code Block
    sed -i 's/verify=platform_default/verify=disable/' /etc/python/cert-verification.cfg

  • Make sure each node can resolve every other node's hostname or add hostname of each node to `/etc/hosts` on every node. For example add following lines in /etc/hosts of each node:

    Code Block
    10.10.10.1 node1
10.10.10.2 node2
10.10.10.3 node3
10.10.10.4 node4

    Where 10.10.10.1, 10.10.10.2, 10.10.10.3 and 10.10.10.4 are the IP addresses of your nodes and "node1", "node2", "node3" and "node4" are their respective hostnames.

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  • Add Metron service to Ambari by running mpack command (make sure to specify correct path to mpack in --mpack=):

    Code Block
    ambari-server install-mpack --mpack=/root/metron/metron-deployment/packaging/ambari/metron-mpack/target/metron_mpack-0.4.01.0.tar.gz --verbose

  • Start Ambari:

    Code Block
    ambari-server start

...

# cp /root/metron/metron-platform/metron-api/target/metron-api-0.4.01.jar /usr/metron/0.4.01/lib/
# wget -O /etc/init.d/pcapservice https://raw.githubusercontent.com/apache/metron/master/metron-deployment/roles/metron_pcapservice/templates/pcapservice
# sed -i 's/{{ pcapservice_jar_dst }}/\/usr\/metron\/0.4.01\/lib\/metron-api-0.4.01.jar/' /etc/init.d/pcapservice
# sed -i 's/{{ pcapservice_port }}/8081/' /etc/init.d/pcapservice
# sed -i 's/{{ query_hdfs_path }}/\/tmp/' /etc/init.d/pcapservice
# sed -i 's/{{ pcap_hdfs_path }}/\/apps\/metron\/pcap/' /etc/init.d/pcapservice
# chmod 755 /etc/init.d/pcapservice
# wget -O /etc/logrotate.d/metron-pcapservice https://raw.githubusercontent.com/apache/metron/master/metron-deployment/roles/metron_pcapservice/templates/metron-pcapservice-logrotate.yml
# sed -i 's/^  {{ metron_pcapservice_logrotate_frequency }}.*$/  daily/' /etc/logrotate.d/metron-pcapservice
# sed -i 's/^  rotate {{ metron_pcapservice_logrotate_retention }}.*$/  rotate 30/' /etc/logrotate.d/metron-pcapservice
# chmod 644 /etc/logrotate.d/metron-pcapservice

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# yum install monit -y
# wget -O /etc/monitrc https://github.com/apache/metron/raw/master/metron-deployment/roles/monit/templates/monit/monit.conf
# sed -i 's/{{ inventory_hostname }}/<IP ADDRESS>/' /etc/monitrc
# sed -i 's/{{ monit_user }}/admin/' /etc/monitrc
# sed -i 's/{{ monit_pass }}/monit/' /etc/monitrc
# chmod 600 /etc/monitrc
# wget -O /etc/monit.d/pcap-replay.monit https://github.com/apache/metron/raw/master/metron-deployment/roles/monit/templates' /monit/pcap-replay.monitetc/monitrc
# chmod 644600 /etc/monit.d/pcap-replay.monitmonitrc
# wget -O /etc/monit.d/pcap-servicereplay.monit https://github.com/apache/metron/raw/master/metron-deployment/roles/monit/templates/monit/pcap-servicereplay.monit
# chmod 644 /etc/monit.d/pcap-servicereplay.monit
# wget -O /etc/monit.d/pycapapcap-service.monit https://github.com/apache/metron/raw/master/metron-deployment/roles/monit/templates/monit/pycapapcap-service.monit
# chmod 644 /etc/monit.d/pycapapcap-service.monit
# wget -O /etc/monit.d/snortpycapa.monit https://github.com/apache/metron/raw/master/metron-deployment/roles/monit/templates/monit/snortpycapa.monit
# chmod 644 /etc/monit.d/snortpycapa.monit
# wget -O /etc/monit.d/yafsnort.monit https://github.com/apache/metron/raw/master/metron-deployment/roles/monit/templates/monit/yafsnort.monit
# chmod 644 /etc/monit.d/yafsnort.monit
# wget -O /etc/monit.d/broyaf.monit https://github.com/apache/metron/raw/master/metron-deployment/roles/monit/templates/monit/bro.monit
# sed -i 's/^  with pidfile.*$/  with pidfile \/usr\/local\/bro\/spool\/bro\/\.pid/' /etc/monit.d/broyaf.monit
# chmod 644 /etc/monit.d/broyaf.monit
# systemctlwget enable-O monit
# systemctl start monit
# systemctl status monit
# monit reload
# monit stop all
# monit start all
# monit summary | tail -n +3 | awk -F"'" '{print $2}'

Miscellaneous Issues

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/etc/monit.d/bro.monit https://github.com/apache/metron/raw/master/metron-deployment/

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roles/monit/

...

templates/

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monit/bro.monit
# sed -i 's/^  with pidfile.*$/  with pidfile \/usr\/local\/bro\/spool\/bro\/\.pid/' /etc/monit.d/bro.monit
# chmod 644 /etc/monit.d/bro.monit
# systemctl enable monit
# systemctl start monit
# systemctl status monit
# monit reload
# monit stop all
# monit start all
# monit summary | tail -n +3 | awk -F"'" '{print $2}'

Miscellaneous Issues

  • I had a problem with Zeppelin after rebooting this machine and had to manually create the Zeppelin run directory:

...