Nagios Support Forum

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cat /var/log/logstash/logstash.log

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grep -i 'out of memory' /var/log/messages

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{:timestamp=>"2015-05-23T03:35:06.515000-0500", :message=>"Failed to flush outgoing items", :outgoing_count=>1, :exception=>org.elasticsearch.client.transport.NoNodeAvailableException: No node available, :backtrace=>["org.elasticsearch.client.transport.TransportClientNodesService.execute(org/elasticsearch/client/transport/TransportClientNodesService.java:219)", "org.elasticsearch.client.transport.support.InternalTransportClient.execute(org/elasticsearch/client/transport/support/InternalTransportClient.java:106)", "org.elasticsearch.client.support.AbstractClient.bulk(org/elasticsearch/client/support/AbstractClient.java:147)", "org.elasticsearch.client.transport.TransportClient.bulk(org/elasticsearch/client/transport/TransportClient.java:360)", "org.elasticsearch.action.bulk.BulkRequestBuilder.doExecute(org/elasticsearch/action/bulk/BulkRequestBuilder.java:165)", "org.elasticsearch.action.ActionRequestBuilder.execute(org/elasticsearch/action/ActionRequestBuilder.java:85)", "org.elasticsearch.action.ActionRequestBuilder.execute(org/elasticsearch/action/ActionRequestBuilder.java:59)", "java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:606)", "LogStash::Outputs::Elasticsearch::Protocols::NodeClient.bulk(/usr/local/nagioslogserver/logstash/lib/logstash/outputs/elasticsearch/protocol.rb:207)", "LogStash::Outputs::Elasticsearch::Protocols::NodeClient.bulk(/usr/local/nagioslogserver/logstash/lib/logstash/outputs/elasticsearch/protocol.rb:207)", "LogStash::Outputs::ElasticSearch.flush(/usr/local/nagioslogserver/logstash/lib/logstash/outputs/elasticsearch.rb:315)", "LogStash::Outputs::ElasticSearch.flush(/usr/local/nagioslogserver/logstash/lib/logstash/outputs/elasticsearch.rb:315)", "Stud::Buffer.buffer_flush(/usr/local/nagioslogserver/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.17/lib/stud/buffer.rb:219)", "Stud::Buffer.buffer_flush(/usr/local/nagioslogserver/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.17/lib/stud/buffer.rb:219)", "org.jruby.RubyHash.each(org/jruby/RubyHash.java:1339)", "Stud::Buffer.buffer_flush(/usr/local/nagioslogserver/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.17/lib/stud/buffer.rb:216)", "Stud::Buffer.buffer_flush(/usr/local/nagioslogserver/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.17/lib/stud/buffer.rb:216)", "Stud::Buffer.buffer_flush(/usr/local/nagioslogserver/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.17/lib/stud/buffer.rb:193)", "Stud::Buffer.buffer_flush(/usr/local/nagioslogserver/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.17/lib/stud/buffer.rb:193)", "Stud::Buffer.buffer_receive(/usr/local/nagioslogserver/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.17/lib/stud/buffer.rb:159)", "Stud::Buffer.buffer_receive(/usr/local/nagioslogserver/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.17/lib/stud/buffer.rb:159)", "LogStash::Outputs::ElasticSearch.receive(/usr/local/nagioslogserver/logstash/lib/logstash/outputs/elasticsearch.rb:311)", "LogStash::Outputs::ElasticSearch.receive(/usr/local/nagioslogserver/logstash/lib/logstash/outputs/elasticsearch.rb:311)", "LogStash::Outputs::Base.handle(/usr/local/nagioslogserver/logstash/lib/logstash/outputs/base.rb:86)", "LogStash::Outputs::Base.handle(/usr/local/nagioslogserver/logstash/lib/logstash/outputs/base.rb:86)", "RUBY.worker_setup(/usr/local/nagioslogserver/logstash/lib/logstash/outputs/base.rb:78)", "java.lang.Thread.run(java/lang/Thread.java:745)"], :level=>:warn}

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message=>"Failed to flush outgoing items", :outgoing_count=>1, :exception=>org.elasticsearch.client.transport.NoNodeAvailableException: No node available

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cat /usr/local/nagioslogserver/logstash/etc/conf.d/999_outputs.conf
cat /etc/sysconfig/elasticsearch
cat /etc/sysconfig/logstash
cat /usr/local/nagioslogserver/elasticsearch/config/elasticsearch.yml
free -m
check jvm settings: curl -XGET localhost:9200/_nodes/jvm?pretty

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[root@iss-chi-nag07 ~]# cat /usr/local/nagioslogserver/logstash/etc/conf.d/999_outputs.conf
#
# Logstash Configuration File
# Dynamically created by Nagios Log Server
#
# DO NOT EDIT THIS FILE. IT WILL BE OVERWRITTEN.
#
# Created Thu, 14 May 2015 10:44:49 -0500
#

#
# Required output for Nagios Log Server
#

output {
    elasticsearch {
        cluster => '39fd1a19-2038-485c-8782-180c8be9a886'
        host => 'localhost'
        index_type => '%{type}'
        node_name => 'cb57677a-dfa9-4822-91d1-edcbb768e56e'
        protocol => 'transport'
        workers => 4
    }
}

#
# Global outputs
#



#
# Local outputs
#

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[root@iss-chi-nag07 ~]# cat /etc/sysconfig/elasticsearch
# Directory where the Elasticsearch binary distribution resides
APP_DIR="/usr/local/nagioslogserver"
ES_HOME="$APP_DIR/elasticsearch"

# Heap Size (defaults to 256m min, 1g max)
# Nagios Log Server Default to 0.5 physical Memory
ES_HEAP_SIZE=$(expr $(free -m|awk '/^Mem:/{print $2}') / 2 )m

# Heap new generation
#ES_HEAP_NEWSIZE=

# max direct memory
#ES_DIRECT_SIZE=

# Additional Java OPTS
#ES_JAVA_OPTS=

# Maximum number of open files
MAX_OPEN_FILES=65535

# Maximum amount of locked memory
MAX_LOCKED_MEMORY=unlimited

# Maximum number of VMA (Virtual Memory Areas) a process can own
MAX_MAP_COUNT=262144

# Elasticsearch log directory
LOG_DIR=/var/log/elasticsearch

# Elasticsearch data directory
DATA_DIR="$ES_HOME/data"

# Elasticsearch work directory
WORK_DIR="$APP_DIR/tmp/elasticsearch"

# Elasticsearch conf directory
CONF_DIR="$ES_HOME/config"

# Elasticsearch configuration file (elasticsearch.yml)
CONF_FILE="$ES_HOME/config/elasticsearch.yml"

# User to run as, change this to a specific elasticsearch user if possible
# Also make sure, this user can write into the log directories in case you change them
# This setting only works for the init script, but has to be configured separately for systemd startup
ES_USER=nagios
ES_GROUP=nagios

# Configure restart on package upgrade (true, every other setting will lead to not restarting)
#RESTART_ON_UPGRADE=true

if [ "x$1" == "xstart" -o "x$1" == "xrestart" -o "x$1" == "xreload" -o "x$1" == "xforce-reload" ];then
        GET_ES_CONFIG_MESSAGE="$( php $APP_DIR/scripts/get_es_config.php )"
        GET_ES_CONFIG_RETURN=$?

        if [ "$GET_ES_CONFIG_RETURN" != "0" ]; then
                echo $GET_ES_CONFIG_MESSAGE
                exit 1
        else
                ES_JAVA_OPTS="$GET_ES_CONFIG_MESSAGE"
        fi
fi

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[root@iss-chi-nag07 ~]# cat /etc/sysconfig/logstash
###############################
# Default settings for logstash
###############################

# Override Java location
#JAVACMD=/usr/bin/java

# Set a home directory
APP_DIR=/usr/local/nagioslogserver
LS_HOME="$APP_DIR/logstash"

# set ES_CLUSTER
ES_CLUSTER=$(cat $APP_DIR/var/cluster_uuid)

# Arguments to pass to java
#LS_HEAP_SIZE="256m"
LS_JAVA_OPTS="-Djava.io.tmpdir=$APP_DIR/tmp"

# Logstash filter worker threads
#LS_WORKER_THREADS=1

# pidfiles aren't used for upstart; this is for sysv users.
#LS_PIDFILE=/var/run/logstash.pid

# user id to be invoked as; for upstart: edit /etc/init/logstash.conf
LS_USER=root
LS_GROUP=nagios

# logstash logging
#LS_LOG_FILE=/var/log/logstash/logstash.log
#LS_USE_GC_LOGGING="true"

# logstash configuration directory
LS_CONF_DIR="$LS_HOME/etc/conf.d"

# Open file limit; cannot be overridden in upstart
#LS_OPEN_FILES=2048

# Nice level
#LS_NICE=0

# Increase Filter workers to 4 threads
LS_OPTS=" -w 4"

if [ "x$1" == "xstart" -o "x$1" == "xrestart" -o "x$1" == "xreload" ];then
        GET_LOGSTASH_CONFIG_MESSAGE=$( php /usr/local/nagioslogserver/scripts/get_logstash_config.php )
        GET_LOGSTASH_CONFIG_RETURN=$?
        if [ "$GET_LOGSTASH_CONFIG_RETURN" != "0" ]; then
                echo $GET_LOGSTASH_CONFIG_MESSAGE
                exit 1
        fi
fi

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[root@iss-chi-nag07 ~]# cat /usr/local/nagioslogserver/elasticsearch/config/elasticsearch.yml
##################### Elasticsearch Configuration Example #####################

# This file contains an overview of various configuration settings,
# targeted at operations staff. Application developers should
# consult the guide at <http://elasticsearch.org/guide>.
#
# The installation procedure is covered at
# <http://elasticsearch.org/guide/en/elasticsearch/reference/current/setup.html>.
#
# Elasticsearch comes with reasonable defaults for most settings,
# so you can try it out without bothering with configuration.
#
# Most of the time, these defaults are just fine for running a production
# cluster. If you're fine-tuning your cluster, or wondering about the
# effect of certain configuration option, please _do ask_ on the
# mailing list or IRC channel [http://elasticsearch.org/community].

# Any element in the configuration can be replaced with environment variables
# by placing them in ${...} notation. For example:
#
# node.rack: ${RACK_ENV_VAR}

# For information on supported formats and syntax for the config file, see
# <http://elasticsearch.org/guide/en/elasticsearch/reference/current/setup-configuration.html>


################################### Cluster ###################################

# Cluster name identifies your cluster for auto-discovery. If you're running
# multiple clusters on the same network, make sure you're using unique names.
#
cluster.name: nagios_elasticsearch


#################################### Node #####################################

# Node names are generated dynamically on startup, so you're relieved
# from configuring them manually. You can tie this node to a specific name:
#
# node.name: "Franz Kafka"

# Every node can be configured to allow or deny being eligible as the master,
# and to allow or deny to store the data.
#
# Allow this node to be eligible as a master node (enabled by default):
#
# node.master: true
#
# Allow this node to store data (enabled by default):
#
# node.data: true

# You can exploit these settings to design advanced cluster topologies.
#
# 1. You want this node to never become a master node, only to hold data.
#    This will be the "workhorse" of your cluster.
#
# node.master: false
# node.data: true
#
# 2. You want this node to only serve as a master: to not store any data and
#    to have free resources. This will be the "coordinator" of your cluster.
#
# node.master: true
# node.data: false
#
# 3. You want this node to be neither master nor data node, but
#    to act as a "search load balancer" (fetching data from nodes,
#    aggregating results, etc.)
#
# node.master: false
# node.data: false

# Use the Cluster Health API [http://localhost:9200/_cluster/health], the
# Node Info API [http://localhost:9200/_nodes] or GUI tools
# such as <http://www.elasticsearch.org/overview/marvel/>,
# <http://github.com/karmi/elasticsearch-paramedic>,
# <http://github.com/lukas-vlcek/bigdesk> and
# <http://mobz.github.com/elasticsearch-head> to inspect the cluster state.

# A node can have generic attributes associated with it, which can later be used
# for customized shard allocation filtering, or allocation awareness. An attribute
# is a simple key value pair, similar to node.key: value, here is an example:
#
# node.rack: rack314

# By default, multiple nodes are allowed to start from the same installation location
# to disable it, set the following:
node.max_local_storage_nodes: 1


#################################### Index ####################################

# You can set a number of options (such as shard/replica options, mapping
# or analyzer definitions, translog settings, ...) for indices globally,
# in this file.
#
# Note, that it makes more sense to configure index settings specifically for
# a certain index, either when creating it or by using the index templates API.
#
# See <http://elasticsearch.org/guide/en/elasticsearch/reference/current/index-modules.html> and
# <http://elasticsearch.org/guide/en/elasticsearch/reference/current/indices-create-index.html>
# for more information.

# Set the number of shards (splits) of an index (5 by default):
#
# index.number_of_shards: 5

# Set the number of replicas (additional copies) of an index (1 by default):
#
# index.number_of_replicas: 1

# Note, that for development on a local machine, with small indices, it usually
# makes sense to "disable" the distributed features:
#
# index.number_of_shards: 1
# index.number_of_replicas: 0

# These settings directly affect the performance of index and search operations
# in your cluster. Assuming you have enough machines to hold shards and
# replicas, the rule of thumb is:
#
# 1. Having more *shards* enhances the _indexing_ performance and allows to
#    _distribute_ a big index across machines.
# 2. Having more *replicas* enhances the _search_ performance and improves the
#    cluster _availability_.
#
# The "number_of_shards" is a one-time setting for an index.
#
# The "number_of_replicas" can be increased or decreased anytime,
# by using the Index Update Settings API.
#
# Elasticsearch takes care about load balancing, relocating, gathering the
# results from nodes, etc. Experiment with different settings to fine-tune
# your setup.

# Use the Index Status API (<http://localhost:9200/A/_status>) to inspect
# the index status.


#################################### Paths ####################################

# Path to directory containing configuration (this file and logging.yml):
#
# path.conf: /path/to/conf

# Path to directory where to store index data allocated for this node.
#
# path.data: /path/to/data
#
# Can optionally include more than one location, causing data to be striped across
# the locations (a la RAID 0) on a file level, favouring locations with most free
# space on creation. For example:
#
# path.data: /path/to/data1,/path/to/data2

# Path to temporary files:
#
# path.work: /path/to/work

# Path to log files:
#
# path.logs: /path/to/logs

# Path to where plugins are installed:
#
# path.plugins: /path/to/plugins


#################################### Plugin ###################################

# If a plugin listed here is not installed for current node, the node will not start.
#
# plugin.mandatory: mapper-attachments,lang-groovy


################################### Memory ####################################

# Elasticsearch performs poorly when JVM starts swapping: you should ensure that
# it _never_ swaps.
#
# Set this property to true to lock the memory:
#
bootstrap.mlockall: true

# Make sure that the ES_MIN_MEM and ES_MAX_MEM environment variables are set
# to the same value, and that the machine has enough memory to allocate
# for Elasticsearch, leaving enough memory for the operating system itself.
#
# You should also make sure that the Elasticsearch process is allowed to lock
# the memory, eg. by using `ulimit -l unlimited`.


############################## Network And HTTP ###############################

# Elasticsearch, by default, binds itself to the 0.0.0.0 address, and listens
# on port [9200-9300] for HTTP traffic and on port [9300-9400] for node-to-node
# communication. (the range means that if the port is busy, it will automatically
# try the next port).

# Set the bind address specifically (IPv4 or IPv6):
#
# network.bind_host: 192.168.0.1

# Set the address other nodes will use to communicate with this node. If not
# set, it is automatically derived. It must point to an actual IP address.
#
# network.publish_host: 192.168.0.1

# Set both 'bind_host' and 'publish_host':
#
# network.host: 192.168.0.1

# Set a custom port for the node to node communication (9300 by default):
#
# transport.tcp.port: 9300

# Enable compression for all communication between nodes (disabled by default):
#
transport.tcp.compress: true

# Set a custom port to listen for HTTP traffic:
#
# http.port: 9200

# Set a custom allowed content length:
#
# http.max_content_length: 100mb

# Disable HTTP completely:
#
# http.enabled: false

# Set the HTTP host to listen to
#
http.host: "localhost"

################################### Gateway ###################################

# The gateway allows for persisting the cluster state between full cluster
# restarts. Every change to the state (such as adding an index) will be stored
# in the gateway, and when the cluster starts up for the first time,
# it will read its state from the gateway.

# There are several types of gateway implementations. For more information, see
# <http://elasticsearch.org/guide/en/elasticsearch/reference/current/modules-gateway.html>.

# The default gateway type is the "local" gateway (recommended):
#
# gateway.type: local

# Settings below control how and when to start the initial recovery process on
# a full cluster restart (to reuse as much local data as possible when using shared
# gateway).

# Allow recovery process after N nodes in a cluster are up:
#
# gateway.recover_after_nodes: 1

# Set the timeout to initiate the recovery process, once the N nodes
# from previous setting are up (accepts time value):
#
# gateway.recover_after_time: 5m

# Set how many nodes are expected in this cluster. Once these N nodes
# are up (and recover_after_nodes is met), begin recovery process immediately
# (without waiting for recover_after_time to expire):
#
# gateway.expected_nodes: 2


############################# Recovery Throttling #############################

# These settings allow to control the process of shards allocation between
# nodes during initial recovery, replica allocation, rebalancing,
# or when adding and removing nodes.

# Set the number of concurrent recoveries happening on a node:
#
# 1. During the initial recovery
#
# cluster.routing.allocation.node_initial_primaries_recoveries: 4
#
# 2. During adding/removing nodes, rebalancing, etc
#
# cluster.routing.allocation.node_concurrent_recoveries: 2

# Set to throttle throughput when recovering (eg. 100mb, by default 20mb):
#
# indices.recovery.max_bytes_per_sec: 20mb

# Set to limit the number of open concurrent streams when
# recovering a shard from a peer:
#
# indices.recovery.concurrent_streams: 5


################################## Discovery ##################################

# Discovery infrastructure ensures nodes can be found within a cluster
# and master node is elected. Multicast discovery is the default.

# Set to ensure a node sees N other master eligible nodes to be considered
# operational within the cluster. Its recommended to set it to a higher value
# than 1 when running more than 2 nodes in the cluster.
#
# discovery.zen.minimum_master_nodes: 1

# Set the time to wait for ping responses from other nodes when discovering.
# Set this option to a higher value on a slow or congested network
# to minimize discovery failures:
#
# discovery.zen.ping.timeout: 3s

# For more information, see
# <http://elasticsearch.org/guide/en/elasticsearch/reference/current/modules-discovery-zen.html>

# Unicast discovery allows to explicitly control which nodes will be used
# to discover the cluster. It can be used when multicast is not present,
# or to restrict the cluster communication-wise.
#
# 1. Disable multicast discovery (enabled by default):
#
discovery.zen.ping.multicast.enabled: false
#
# 2. Configure an initial list of master nodes in the cluster
#    to perform discovery when new nodes (master or data) are started:
#
discovery.zen.ping.unicast.hosts: ["localhost"]

# EC2 discovery allows to use AWS EC2 API in order to perform discovery.
#
# You have to install the cloud-aws plugin for enabling the EC2 discovery.
#
# For more information, see
# <http://elasticsearch.org/guide/en/elasticsearch/reference/current/modules-discovery-ec2.html>
#
# See <http://elasticsearch.org/tutorials/elasticsearch-on-ec2/>
# for a step-by-step tutorial.

# GCE discovery allows to use Google Compute Engine API in order to perform discovery.
#
# You have to install the cloud-gce plugin for enabling the GCE discovery.
#
# For more information, see <https://github.com/elasticsearch/elasticsearch-cloud-gce>.

# Azure discovery allows to use Azure API in order to perform discovery.
#
# You have to install the cloud-azure plugin for enabling the Azure discovery.
#
# For more information, see <https://github.com/elasticsearch/elasticsearch-cloud-azure>.

################################## Slow Log ##################################

# Shard level query and fetch threshold logging.

#index.search.slowlog.threshold.query.warn: 10s
#index.search.slowlog.threshold.query.info: 5s
#index.search.slowlog.threshold.query.debug: 2s
#index.search.slowlog.threshold.query.trace: 500ms

#index.search.slowlog.threshold.fetch.warn: 1s
#index.search.slowlog.threshold.fetch.info: 800ms
#index.search.slowlog.threshold.fetch.debug: 500ms
#index.search.slowlog.threshold.fetch.trace: 200ms

#index.indexing.slowlog.threshold.index.warn: 10s
#index.indexing.slowlog.threshold.index.info: 5s
#index.indexing.slowlog.threshold.index.debug: 2s
#index.indexing.slowlog.threshold.index.trace: 500ms

################################## GC Logging ################################

#monitor.jvm.gc.young.warn: 1000ms
#monitor.jvm.gc.young.info: 700ms
#monitor.jvm.gc.young.debug: 400ms

#monitor.jvm.gc.old.warn: 10s
#monitor.jvm.gc.old.info: 5s
#monitor.jvm.gc.old.debug: 2s

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[root@iss-chi-nag07 ~]# free -m
             total       used       free     shared    buffers     cached
Mem:         32112      22082      10030          1        526       1468
-/+ buffers/cache:      20087      12025
Swap:         4095          0       4095

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[root@iss-chi-nag07 ~]# curl -XGET localhost:9200/_nodes/jvm?pretty
{
  "cluster_name" : "39fd1a19-2038-485c-8782-180c8be9a886",
  "nodes" : {
    "ogsv_t7ARh-s1DvdVEV69Q" : {
      "name" : "cb57677a-dfa9-4822-91d1-edcbb768e56e",
      "transport_address" : "inet[/10.160.1.111:9300]",
      "host" : "iss-chi-nag07.net.itciss.com",
      "ip" : "10.160.1.111",
      "version" : "1.3.2",
      "build" : "dee175d",
      "http_address" : "inet[localhost/127.0.0.1:9200]",
      "attributes" : {
        "max_local_storage_nodes" : "1"
      },
      "jvm" : {
        "pid" : 675,
        "version" : "1.7.0_79",
        "vm_name" : "OpenJDK 64-Bit Server VM",
        "vm_version" : "24.79-b02",
        "vm_vendor" : "Oracle Corporation",
        "start_time_in_millis" : 1431617730390,
        "mem" : {
          "heap_init_in_bytes" : 16835936256,
          "heap_max_in_bytes" : 16766205952,
          "non_heap_init_in_bytes" : 24313856,
          "non_heap_max_in_bytes" : 224395264,
          "direct_max_in_bytes" : 16766205952
        },
        "gc_collectors" : [ "ParNew", "ConcurrentMarkSweep" ],
        "memory_pools" : [ "Code Cache", "Par Eden Space", "Par Survivor Space", "CMS Old Gen", "CMS Perm Gen" ]
      }
    },
    "2kWAman2T9CRHxCtgXHi_w" : {
      "name" : "74bf7c90-9c72-447d-a238-2c80f803d975",
      "transport_address" : "inet[/10.160.1.154:9300]",
      "host" : "iss-chi-nag10.net.itciss.com",
      "ip" : "10.160.1.154",
      "version" : "1.3.2",
      "build" : "dee175d",
      "http_address" : "inet[localhost/127.0.0.1:9200]",
      "attributes" : {
        "max_local_storage_nodes" : "1"
      },
      "jvm" : {
        "pid" : 3999,
        "version" : "1.7.0_79",
        "vm_name" : "OpenJDK 64-Bit Server VM",
        "vm_version" : "24.79-b02",
        "vm_vendor" : "Oracle Corporation",
        "start_time_in_millis" : 1431711758459,
        "mem" : {
          "heap_init_in_bytes" : 16835936256,
          "heap_max_in_bytes" : 16766205952,
          "non_heap_init_in_bytes" : 24313856,
          "non_heap_max_in_bytes" : 224395264,
          "direct_max_in_bytes" : 16766205952
        },
        "gc_collectors" : [ "ParNew", "ConcurrentMarkSweep" ],
        "memory_pools" : [ "Code Cache", "Par Eden Space", "Par Survivor Space", "CMS Old Gen", "CMS Perm Gen" ]
      }
    }
  }
}

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cat /etc/hosts

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[jclark@iss-chi-nag07 ~]$ ping localhost
PING localhost (127.0.0.1) 56(84) bytes of data.
64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.052 ms
64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.051 ms
64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.051 ms

--- localhost ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2205ms
rtt min/avg/max/mdev = 0.051/0.051/0.052/0.005 ms
[jclark@iss-chi-nag07 ~]$ cat /etc/hosts
127.0.0.1   localhost localhost.localdomain
10.160.1.111 iss-chi-nag07.net.itciss.com iss-chi-nag07