apache2.2 tomcat6 jk 负载均衡, 做backup server

mod_jk-1.2.30-httpd-2.2.3.so    

mod_jk-1.2.30-httpd-2.2.3.so    

# Licensed to the Apache Software Foundation (ASF) under one or more
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Note that the distributed version of this file requires modification
# before it is usable.
#
# Reference documentation: http://tomcat.apache.org/connectors-doc/reference/workers.html
#
# As a general note, the characters $( and ) are used internally to define
# macros. Do not use them in your own configuration!!!
#
# Whenever you see a set of lines such as:
# x=value
# y=$(x)\something
#
# the final value for y will be value\something

# Define two status worker:
# - jk-status for read-only use
# - jk-manager for read/write use
worker.list=jk-status
worker.jk-status.type=status
worker.jk-status.read_only=true

worker.list=jk-manager
worker.jk-manager.type=status

# We define a load balancer worker
# with name "balancer"
worker.list=balancer
worker.balancer.type=lb
# error_escalation_time: seconds, default = recover_time/2 (=30)
# Determines, how fast a detected error should switch from
# local error state to global error state
# Since: 1.2.28
worker.balancer.error_escalation_time=0

# - max_reply_timeouts: number, default=0
# If there are to many reply timeouts, a worker
# is put into the error state, i.e. it will become
# unavailable for all sessions residing on the respective
# Tomcat. The number of tolerated reply timeouts is
# configured with max_reply_timeouts. The number of
# timeouts occuring is divided by 2 once a minute and the
# resulting counter is compared against max_reply_timeouts.
# If you set max_reply_timeouts to N and the errors are
# occuring equally distributed over time, you will
# tolerate N/2 errors per minute. If they occur in a burst
# you will tolerate N errors.
# Since: 1.2.24
worker.balancer.max_reply_timeouts=10



# Now we add members to the load balancer
# First member is "node1", most
# attributes are inherited from the
# template "worker.template".
worker.balancer.balance_workers=node1
worker.node1.reference=worker.template
worker.node1.host=localhost
worker.node1.port=8109
# Activation allows to configure
# whether this node should actually be used
# A: active (use node fully)
# D: disabled (only use, if sticky session needs this node)
# S: stopped (do not use)
# Since: 1.2.19
worker.node1.activation=A

# Second member is "node2", most
# attributes are inherited from the
# template "worker.template".
worker.balancer.balance_workers=node2
worker.node2.reference=worker.template
worker.node2.host=localhost
worker.node2.port=8209
# Activation allows to configure
# whether this node should actually be used
# A: active (use node fully)
# D: disabled (only use, if sticky session needs this node)
# S: stopped (do not use)
# Since: 1.2.19
worker.node2.activation=A

# Finally we put the parameters
# which should apply to all our ajp13
# workers into the referenced template
# - Type is ajp13
worker.template.type=ajp13

# - socket_connect_timeout: milliseconds, default=0
# Since: 1.2.27
worker.template.socket_connect_timeout=5000

# - socket_keepalive: boolean, default=false
# Should we send TCP keepalive packets
# when connection is idle (socket option)?
worker.template.socket_keepalive=true

# - ping_mode: Character, default=none
# When should we use cping/cpong connection probing?
# C = directly after establishing a new connection
# P = directly before sending each request
# I = in regular intervals for idle connections
# using the watchdog thread
# A = all of the above
# Since: 1.2.27
worker.template.ping_mode=A

# - ping_timeout: milliseconds, default=10000
# Wait timeout for cpong after cping
# Can be overwritten for modes C and P
# Using connect_timeout and prepost_timeout.
# Since: 1.2.27
worker.template.ping_timeout=10000

# - connection_pool_minsize: number, default=connection_pool_size
# Lower pool size when shrinking pool due
# to idle connections
# We want all connections to be closed when
# idle for a long time in order to prevent
# firewall problems.
# Since: 1.2.16
worker.template.connection_pool_minsize=0

# - connection_pool_timeout: seconds, default=0
# Idle time, before a connection is eligible
# for being closed (pool shrinking).
# This should be the same value as connectionTimeout
# in the Tomcat AJP connector, but there it is
# milliseconds, here seconds.
worker.template.connection_pool_timeout=600

# - reply_timeout: milliseconds, default=0
# Any pause longer than this timeout during waiting
# for a part of the reply will abort handling the request
# in mod_jk. The request will proceed running in
# Tomcat, but the web server resources will be freed
# and an error is send to the client.
# For individual requests, the timeout can be overwritten
# by the Apache environment variable JK_REPLY_TIMEOUT.
# JK_REPLY_TIMEOUT since: 1.2.27
worker.template.reply_timeout=300000

# - recovery_options: number, default=0
# Bit mask to configure, if a request, which was send
# to a backend successfully, should be retried on another backend
# in case there's a problem with the response.
# Value "3" disables retries, whenever a part of the request was
# successfully send to the backend.
worker.template.recovery_options=3