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Install EDEX

EDEX is the Environmental Data Exchange system that represents the backend server for AWIPS. EDEX is only supported for Linux systems: CentOS and RHEL, and ideally, it should be on its own dedicated machine. It requires administrator priviledges to make root-level changes. EDEX can run on a single machine or be spread across multiple machines. To learn more about that please look at Distributed EDEX, Installing Across Multiple Machines


System requirements

  • 64-bit CentOS/RHEL 7
  • 16+ CPU cores (each CPU core can run a decorder in parallel)
  • 24GB RAM
  • 700GB+ Disk Space
  • gcc-c++ package
    • Run rpm -qa | grep gcc-c++ to verify if the package is installed
    • If it is not installed, run yum install gcc-c++ to install the package
  • A Solid State Drive (SSD) is recommended
    • A SSD should be mounted either to /awips2 (to contain the entire EDEX system) or to /awips2/edex/data/hdf5 (to contain the large files in the decoded data store). EDEX can scale to any system by adjusting the incoming LDM data feeds or adjusting the resources (CPU threads) allocated to each data type.

Note: EDEX is only supported for 64-bit CentOS and RHEL 7 Operation Systems. You may have luck with Fedora Core 12 to 14 and Scientific Linux.

EDEX is not supported in Debian, Ubuntu, SUSE, Solaris, macOS, or Windows.


Download and Installation Instructions

All of these command should be run as root

1. Create AWIPS User

Create user awips and group fxalpha

groupadd fxalpha && useradd -G fxalpha awips

or if the awips account already exists:

groupadd fxalpha && usermod -G fxalpha awips

2. Install EDEX

Download the and run the installer: awips_install.sh

wget https://www.unidata.ucar.edu/software/awips2/awips_install.sh
chmod 755 awips_install.sh
sudo ./awips_install.sh --edex

awips_install.sh --edex will perform the following steps (it's always a good idea to review downloaded shell scripts):

  1. Saves the appropriate Yum repo file to /etc/yum.repos.d/awips2.repo
  2. Increases process and file limits for the the awips account in /etc/security/limits.conf
  3. Creates /awips2/data_store if it does not exist already
  4. Runs yum groupinstall awips2-server
  5. Attempts to configure the EDEX hostname defined in /awips2/edex/bin/setup.env
  6. Alerts the user if the awips account does not exist (the RPMs will still install)

3. EDEX Setup

Change user and run edex setup:

sudo su - awips
sudo edex setup

The command edex setup will try to determine your fully-qualified domain name and set it in /awips2/edex/bin/setup.env. EDEX Server Administrators should double-check that the addresses and names defined in setup.env are resolvable from both inside and outside the server, and make appropriate edits to /etc/hosts if necessary.

Setup Example

For example, in the XSEDE Jetstream cloud, the fully-qualified domain name defined in /awips2/edex/bin/setup.env

export EXT_ADDR=js-196-132.jetstream-cloud.org
export DB_ADDR=localhost
export DB_PORT=5432
export BROKER_ADDR=localhost
export PYPIES_SERVER=http://${EXT_ADDR}:9582

The external address needs to direct to localhost in /etc/hosts

127.0.0.1   localhost localhost.localdomain js-196-132.jetstream-cloud.org

4. Configure iptables

Configure iptables to allow TCP connections on ports 9581 and 9582 if you want to serve data to CAVE clients and the Python API.

Open Port 9588

If you are running a Registry (Data Delivery) server, you will also want to open port 9588.

To open ports to all connections
vi /etc/sysconfig/iptables

*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 9581 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 9582 -j ACCEPT
#-A INPUT -m state --state NEW -m tcp -p tcp --dport 9588 -j ACCEPT # for registry/dd
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
To open ports to specific IP addresses

In this example, the IP range 128.117.140.0/24 will match all 128.117.140.* addresses, while 128.117.156.0/24 will match 128.117.156.*.

vi /etc/sysconfig/iptables

*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]
:EXTERNAL - [0:0]
:EDEX - [0:0]
-A INPUT -i lo -j ACCEPT
-A INPUT -p icmp --icmp-type any -j ACCEPT
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -s 128.117.140.0/24 -j EDEX
-A INPUT -s 128.117.156.0/24 -j EDEX
-A INPUT -j EXTERNAL
-A EXTERNAL -j REJECT
-A EDEX -m state --state NEW -p tcp --dport 22 -j ACCEPT
-A EDEX -m state --state NEW -p tcp --dport 9581 -j ACCEPT
-A EDEX -m state --state NEW -p tcp --dport 9582 -j ACCEPT
#-A EDEX -m state --state NEW -p tcp --dport 9588 -j ACCEPT # for registry/dd
-A EDEX -j REJECT
COMMIT

Restart iptables

service iptables restart

Troubleshooting

For CentOS 7 error:

Redirecting to /bin/systemctl restart iptables.service
Failed to restart iptables.service: Unit iptables.service failed to load: No such >file or directory.

The solution is:

yum install iptables-services
systemctl enable iptables
service iptables restart

5. Start EDEX

edex start

To manually start, stop, and restart:

service edex_postgres start
service httpd-pypies start
service qpidd start
service edex_camel start

The fifth service, edex_ldm, does not run at boot to prevent filling up disk space if EDEX is not running.

ldmadmin start

To start all services except the LDM (good for troubleshooting):

edex start base

To restart EDEX

edex restart

Additional Steps

Increase Process Limit

/etc/security/limits.conf defines the number of user processes and files (this step is automatically performed by ./awips_install.sh --edex). Without these definitions, Qpid is known to crash during periods of high ingest.

awips soft nproc 65536
awips soft nofile 65536

Ensure SELinux is Disabled

This step is no longer necessary with version LDM-6.13 or higher. The version shipped with Unidata's EDEX is higher than this cutoff.

vi /etc/sysconfig/selinux

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

Read more about selinux at redhat.com


SSD Mount

Though a Solid State Drive is not required, it is strongly encouraged in order to handle the amount of disk IO for real-time IDD feeds.

The simplest configuration would be to mount an 500GB+ SSD to /awips2 to contain both the installed software (approx. 20GB) and the real-time data (approx. 150GB per day).

The default purge rules are configured such that the processed data in /awips2 does not exceed 450GB. The raw data is located in /awips2/data_store, and is scoured every hour and should not exceed 50GB.

If you want to increase EDEX data retention you should mount a large disk to /awips2/edex/data/hdf5 since this will be where the archived processed data exists, and any case studies created.

Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1        30G  2.5G   26G   9% /
tmpfs            28G     0   28G   0% /dev/shm
/dev/sdc1       788G   81G  667G  11% /awips2
/dev/sdb1       788G   41G  708G  10% /awips2/edex/data/hdf5

Configure LDM Feeds

EDEX installs its own version of the LDM to the directory /awips2/ldm. As with a the default LDM configuration, two files are used to control what IDD feeds are ingested:

Configuration file: /awips2/ldm/etc/ldmd.conf

This file specifies an upstream LDM server to request data from, and what feeds to request:

REQUEST NEXRAD3 "./p(DHR|DPR|DSP|DTA|DAA|DVL|EET|HHC|N0Q|N0S|N0U|OHA|NVW|NTV|NST)." idd.unidata.ucar.edu
REQUEST FNEXRAD|IDS|DDPLUS|UNIWISC ".*" idd.unidata.ucar.edu
REQUEST NGRID ".*" idd.unidata.ucar.edu
REQUEST NOTHER "^TIP... KNES.*" idd.unidata.ucar.edu

Configuration File: /awips2/ldm/etc/pqact.conf

This file specifies the WMO headers and file pattern actions to request:

# Redbook graphics
ANY     ^([PQ][A-Z0-9]{3,5}) (....) (..)(..)(..) !redbook [^/]*/([^/]*)/([^/]*)/([^/]*)/([0-9]{8})
        FILE    -overwrite -close -edex /awips2/data_store/redbook/\8/\4\5Z_\8_\7_\6-\1_\2_(seq).rb.%Y%m%d%H
# NOAAPORT GINI images
NIMAGE  ^(sat[^/]*)/ch[0-9]/([^/]*)/([^/]*)/([^ ]*) ([^/]*)/([^/]*)/([^/]*)/ (T[^ ]*) ([^ ]*) (..)(..)(..)
        FILE    -overwrite -close -edex /awips2/data_store/sat/\(11)\(12)Z_\3_\7_\6-\8_\9_(seq).satz.%Y%m%d%H

Directories to Know

  • /awips2 - Contains all of the installed AWIPS software.
  • /awips2/edex/logs - EDEX logs.
  • /awips2/httpd_pypies/var/log/httpd - httpd-pypies logs.
  • /awips2/database/data/pg_log - PostgreSQL logs.
  • /awips2/qpid/log - Qpid logs.
  • /awips2/edex/data/hdf5 - HDF5 data store.
  • /awips2/edex/data/utility - Localization store and configuration files.
  • /awips2/ldm/etc - Location of ldmd.conf and pqact.conf
  • /awips2/ldm/logs - LDM logs.
  • /awips2/data_store - Raw data store.
  • /awips2/data_store/ingest - Manual data ingest endpoint.

What Version is my EDEX?

rpm -qa | grep awips2-edex