18.5 提供 LDAP 負載平衡與容錯

若有多個 LDAP 伺服器用來存取使用者來源 (目錄)，您可以將 ZENworks 伺服器設定為瞭解每個 LDAP 伺服器的動態。如此可提供負載平衡和容錯功能。

例如，如果您有多個 ZENworks 伺服器，可以將各個伺服器設定為透過不同的 LDAP 伺服器存取使用者來源。如此可在 LDAP 伺服器之間更平均地分配工作負載。

同樣地，對於各個 ZENworks 伺服器，您可以列出它用來連接至使用者來源的多個 LDAP 伺服器。若其中的某個 LDAP 伺服器不可用，ZENworks 伺服器可以使用其他的 LDAP 伺服器。

若要為 ZENworks 伺服器定義其他的 LDAP 伺服器︰

  1. 將 alt-servers.properties.sample 檔案複製到名為 alt-servers.properties 的新檔案。此檔案位於 ZENworks 伺服器的以下目錄︰

    • Windows︰c:\program files\novell\zenworks\conf\datamodel\authsource

    • Linux︰/etc/opt/novell/zenworks/datamodel/authsource

  2. 變更 alt-servers.properties 檔案，以包含使用者來源名稱及可用來存取使用者來源的 LDAP 伺服器清單。

    以下顯示的檔案包含格式化項目的指示。

    # Sample alt-servers.properties file.
#
# The alt-servers.properties file allows you to configure how this server will connect to a particular user source.
# When connecting to a LDAP user source, ZENworks will try to connect to the servers in the order listed in this file.
# This allows for fail-over to other LDAP servers and for load distribution, if different ZENworks Primary Servers are
# configured with the server addresses in a different order.
#
# * The [user-source-name] must exactly match how the user source name appears on the configuration page in ZCC.
# * You must specify the LDAP port along with each server address.
# * SSL is configured for the entire user source, not for each individual server. You must specify either the
#   SSL port or the clear text port for all servers, depending on how the user source is configured in ZCC.
# * If the server-list.properties file contains an entry for a user source, ZENworks will not try to connect to the
#   server address configured in ZCC. It only tries the addresses listed in the properties file.
# * If you create or modify the server-list.properties file, you will need to restart the Novell ZENworks Server and
#   Novell ZENworks Loader services for it to take effect.
# * Performance will be impacted if one or more of the servers at the top of the list are down, as ZENworks attempts to
#   connect to the servers in order. This is particularly true of the CASA authentication token service, which is
#   contacted when a user tries to log in to ZENworks on a workstation.
#
# Format:
#
# [user-source-name]=\
#   [host1]:[port] \
#   [host2]:[port] \
#   [host3]:[port]
#
# Example:
#
MY_EDIR_TREE=\
  edir1.novell.com:636 \
  edir2.novell.com:636 \
  edir3.novell.com:636 \
  edir4.novell.com:636

  3. 重新啟動 ZENworks 伺服器。

  4. 對於您要為之定義其他 LDAP 伺服器的各 ZENworks 伺服器，請重複步驟 1 至步驟 3。