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iscsi (4) Versions 0.0.4

Installs configures open-iscsi for storage arrays

Berkshelf/Librarian
Policyfile
Knife
cookbook 'iscsi', '= 0.0.4'
cookbook 'iscsi', '= 0.0.4', :supermarket
knife cookbook site install iscsi
knife cookbook site download iscsi
README
Dependencies
Quality

DESCRIPTION:

This cookbook provides provides the ability to configure Open-iSCSI for Enterprise Linux based systems. The default attributes reflect original research and recommendations gathered from Dell, Equallogic, and RedHat.

I have included a PDF of our own whitepaper discussing the configuration and tuning of Open-iSCSI with this cookbook, as supplementary documentation. Here is a list of recommended source documentation in addition to the included PDF.

REQUIREMENTS:

Required Cookbooks

  • multipath
  • el-sysctl
  • dbench

ATTRIBUTES:

iscsid.conf

  • iscsi (namespace)
    • ["session"]["timeo"]["replacement_timeout"]: Time to wait before failing SCSI commands back to the application, default 15
    • ["conn0"]["timeo"]["noop_out_interval"]: Interval to wait before sending a ping, default 5
    • ["conn0"]["timeo"]["noop_out_timeout"]: Time to wait for a NOP-out before failing the connection, default 5
    • ["session"]["inital_login_retry_max"]: Initial number of login tries, default 12
    • ["session"]["cmds_max"]: How many commands the session will queue, default 1024
    • ["session"]["queue_depth"]: Device queue depth, default 128
    • ["session"]["iscsi"]["fastabort"]: IET targets need Yes, Equallogic needs set to No. Default is Yes

udev rules

  • iscsi (namespace)
    • ["interfaces"] Array of ethernet devices to apply ethtool options via udev. Default empty.
    • ["ethtool_opts"] Turn on or off, certain features on iSCSI ethernet devices. Default flow control on, autonegotiate off, Generic Recieve offload off

sysctl

  • net (namespace)

    • ["ipv4"]["conf"]["all"]["arp_ignore"] Modes of ARP replies. Default 1, reply only if local IP address.
    • ["ipv4"]["conf"]["all"]["arp_announce"] Modes of ARP announcement. Default 2, use the best lcoal address.
    • ["ipv4"]["netfilter"]["ip_conntrack_tcp_be_liberal"] 1 Disables TCP window tracking, default 1
  • sysctl

    • ["has_iscsi"] Boolean to turn on iSCSI elements in sysctl recipe template, Default false

USAGE:

Set role specific overrides, and add recipe["iscsi"] to runlist

Example iSCSI role for an Equallogic storage array

name "iscsi"
description "Installs and configures Open-iSCSI for EQL. Installs dm-multipath.  Configures sysctl."
override_attributes "iscsi" => {
  "session" => {
    "iscsi" => {
      "fastabort" => "No"
  }
},
"sysctl" => {
  "has_iscsi" => true
}
run_list "recipe[iscsi]", "recipe[el-sysctl]", "recipe[multipath]", "recipe[dbench]"

Example iSCSI role for an IET storage array

name "iscsi"
description "Installs and configures Open-iSCSI for IET. Installs dm-multipath.  Configures sysctl."
override_attributes "iscsi" => {
  "session" => {
    "iscsi" => {
      "fastabort" => "Yes"
  }
},
"sysctl" => {
  "has_iscsi" => true
}
run_list "recipe[iscsi]", "recipe[el-sysctl]", "recipe[multipath]", "recipe[dbench]"

LICENSE AND AUTHOR:

Copyright 2010-2011, Eric G. Wolfe

Licensed 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.

Dependent cookbooks

el-sysctl >= 0.0.0
multipath >= 0.0.0

Contingent cookbooks

There are no cookbooks that are contingent upon this one.

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