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EDEX for Linux

System Requirements

  • 64-bit CentOS/RHEL 6 or 7
  • 16+ CPU cores (each CPU core is one more decoder which can run in parallel)
  • 24GB+ RAM
  • 500GB+ disk space
  • A Solid State Drive (SSD) is highly recommended

An 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.

64-bit CentOS/RHEL 6 and 7 are the only supported operating systems for EDEX. You may have luck with Fedora Core 12 to 14 and Scientific Linux.

EDEX is not supported on Debian, Ubuntu, SUSE, Solaris, OS X, or Windows.

Read More: Distributed EDEX, Installing Across Multiple Machines


Linux One-Time Setup

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 and run install.sh --edex

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

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. Check /etc/hosts against /awips2/edex/bin/setup.env

EDEX Server Administrators should check that the addresses and names defined in /awips2/edex/bin/setup.env are resolvable from both inside and outside the server, and make appropriate edits to /etc/hosts

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

is directed within 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.

  • 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 -j REJECT --reject-with icmp-host-prohibited
    -A FORWARD -j REJECT --reject-with icmp-host-prohibited
    COMMIT
    
  • To open ports to specific IP addresses

    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 -j REJECT
    COMMIT
    

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..

Restart iptables

service iptables restart

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. Ensure SELinux is Disabled

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

reboot if necessary, required if iptables was updated.


Additional Steps

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 /awips2 does not exceed 450GB. /awips2/data_store 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

EDEX Setup

The command edex setup attempts to add the domain name of your server.

  • /awips2/edex/bin/setup.env should contain the fully-qualified domain name, externally resolved, localhost will not work.

    export AW_SITE_IDENTIFIER=OAX
    export EDEX_SERVER=edex-cloud.unidata.ucar.edu
    
  • /awips2/ldm/etc/ldmd.conf contains the upstream server (default idd.unidata.ucar.edu, which requires you connect form a .edu domain). This file also contains the edexBridge hostname (default localhost).

    EXEC    "pqact -e"
    EXEC    "edexBridge -s localhost"
    
  • /etc/security/limits.conf defines the number of user processes and files (this step is automatically performed by install.sh --edex). Without these definitions, Qpid is known to crash during periods of high ingest.

    awips soft nproc 65536
    awips soft nofile 65536
    

LDM

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:

  • /awips2/ldm/etc/ldmd.conf - 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
    
  • /awips2/ldm/etc/pqact.conf - 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
    

Start and Stop

to start all EDEX services, including the LDM:

edex start

Starting EDEX PostgreSQL:                                  [  OK  ]
Starting httpd:                                            [  OK  ]
Starting QPID                                              [  OK  ]
Starting EDEX Camel (request): 
Starting EDEX Camel (ingest): 
Starting EDEX Camel (ingestGrib): 
Starting AWIPS LDM:The product-queue is OK.

to stop:

edex stop

Stopping EDEX Camel (request): 
Stopping EDEX Camel (ingest): 
Stopping EDEX Camel (ingestGrib): 
Stopping QPID                                              [  OK  ]
Stopping httpd:                                            [  OK  ]
Stopping EDEX PostgreSQL:                                  [  OK  ]
Stopping AWIPS LDM:Stopping the LDM server...

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

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/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