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Chapter 14. Server Configuration
14.1. Configuring ThinLinc Servers in a Cluster
In this section, we will describe how to configure a ThinLinc cluster with multiple agent servers to allow
load-balancing and redundancy.
Note: This section does not address configuration of high availability (HA). For information on
configuring your ThinLinc cluster for high availability, see Chapter 6.
A ThinLinc cluster consists of one master server (or multiple master servers in a HA configuration) with
multiple agent servers behind it. While ThinLinc in its simplest configuration may be run with both the
master and agent installed on the same machine, running ThinLinc in a cluster configuration conveys
numerous advantages:
1. A cluster configuration allows automatic load-balancing of sessions across multiple agents
2. Having multiple agents offers redundancy; for example, if one agent goes down or is taken out of
service for maintenance, other agents are still available to handle user sessions
3. A cluster configuration is scalable. Since most of the workload is taken up by the agents and not the
master, adding more capacity to your ThinLinc installation is generally as easy as installing one or
more new agent servers
14.1.1. Configuration Options
When configuring ThinLinc servers as a cluster, there are two main configuration options which need to
be set, one on the master and one on the agent(s):
/vsmserver/terminalservers
This parameter is configured on the master, and contains a list of all agent servers which will be part
of this cluster. Only servers in this list will be considered by the master as available to create
sessions on. See Section 14.2.2 for details.
/vsmagent/master_hostname
This parameter is configured on each agent in the cluster, and contains the name of the master server
for the cluster. See Section 14.2.1 for details.
Once the two parameters above have been configured, and the vsmagent and vsmserver services have
been restarted, these ThinLinc servers will then function as a cluster.
14.1.2. Cluster Management
When multiple agents have been configured as part of a cluster, it is usually desirable to keep their
configurations synchronised. Instead of making the same change seperately on each agent, ThinLinc
147
- Copyright © 2014 Cendio AB 2
- Table of Contents 3
- Chapter 1. Introduction 11
- 2.1. Session Overview 14
- Chapter 3. Installation 15
- 3.2.3. Server Sizing 16
- • Memory 17
- 3.3.4.1. Relays 21
- 3.3.4.2. DNS 22
- 3.5.1. Acquire New Licenses 23
- 3.5.4. Run tl-setup 24
- 3.7.1. Overview 25
- 3.8. VirtualGL 26
- Chapter 4. License Handling 29
- Chapter 5. Printer Features 31
- 5.2.1. CUPS Browsing 32
- 5.3. Local printer support 33
- 5.3.3. Device dependent mode 34
- 5.4. Nearest printer support 35
- 5.5. Printer Access Control 36
- 5.5.1. Theory of Operation 37
- 5.5.2. Requirements 37
- 5.5.4. Configuration 38
- 5.6.1. Configuration 39
- 6.1. Overview 41
- 6.1.3. Theory of Operation 42
- /etc/ssh/ssh_host_ 43
- /vsmserver/terminalservers 43
- 7.1. Client usage 47
- 7.1.3. Language Settings 49
- 7.1.5. The session menu 50
- 7.3. Local device export 53
- 7.3.3. Drives 54
- 7.3.4. Printer 54
- 7.3.5. Smart Card Readers 54
- 7.4. Client configuration 55
- 7.4.2. Local Devices tab 57
- /dev/ttyS0) or a Windows COM 59
- 7.4.3. Screen tab 61
- 7.4.4. Optimization tab 62
- 7.4.5. Security tab 65
- ALLOW_HOSTKEY_UPDATE 66
- Smart card - certificate filter 68
- 7.5. The XDM mode (UNIX only) 69
- 7.5.1.1. Mouse tab 70
- 7.5.1.2. Keyboard tab 70
- 7.5.1.3. Screen tab 71
- 7.6. Logfile placement 72
- • 1 for port 80 78
- • 0 for Raw 79
- • 5 for Hextile 79
- • 7 for Tight 79
- • 16 for ZRLE 79
- 7.8. Client Customizer 81
- 7.9. Advanced Topics 82
- 8.3. Linux PC 84
- ~/tl-4.3.0-clients 85
- 8.4. Solaris 87
- 8.5. Thin Terminals 87
- 8.5.3. VXL 89
- 8.5.4. HP ThinPro Terminals 89
- 8.5.5. IGEL Universal Desktop 90
- 8.5.8. Other Thin Terminals 91
- Terminal 92
- 8.6.2.1. Basic Configuration 93
- ServerAlias 94
- 8.7.3.1. Server Side 97
- 8.7.3.2. Browser Side 98
- Chapter 8. Client Platforms 100
- 9.2. Limitations 101
- • Trigger a run via iManager 104
- [root@test root] 105
- <filename.pem> 105
- 9.3.5.1. Functionality 109
- 9.3.5.2. Configuration 110
- 9.4.1. Introduction 111
- Single Sign-On 111
- 9.4.2. Key Generation 112
- 9.4.3. Server Configuration 112
- 9.4.4. Client Configuration 112
- 9.5.1. Introduction 113
- 9.5.2. General Requirements 113
- 9.5.3. Key Generation 113
- 9.5.4. Server Configuration 113
- 9.5.5. Client Configuration 114
- 9.5.6. Automatic Connection 114
- 9.5.7.1. Command line options 115
- 9.5.7.2. Configuration 116
- Configuration parameters 116
- 9.6. Using One Time Passwords 118
- Chapter 10. File Access 121
- 10.1.3.1. Using tl-mount-cifs 122
- 10.2.1. Introduction 123
- 10.2.2.1. Requirements 124
- 10.2.3.1. Requirements 126
- 10.2.3.2. Logging in 126
- 10.2.3.3. Mounting Shares 127
- 10.2.3.4. Logging out 127
- 10.2.4.1. Requirements 128
- 10.2.4.2. NDS Configuration 128
- 10.2.4.4. UNIX Configuration 129
- 10.3.1. Introduction 132
- 10.3.2. Activation 132
- 10.3.3. Configuration 133
- 11.1. Introduction 135
- 11.2. Single Sign-On 135
- 11.3. Connection Modes 135
- 12.1.1. Introduction 139
- 12.2.1. Introduction 141
- 12.2.2. Requirements 141
- 12.3.1. Introduction 142
- 12.3.2. Requirements 142
- 12.3.3.3. OSS applications 143
- 12.3.3.4. ALSA applications 144
- 12.4.1. Introduction 145
- 12.4.2. Requirements 145
- Commands in /opt/thinlinc/bin 147
- ~/.ICAClient/appsrv.ini and 152
- ~/.ICAClient/reg.ini 152
- --test ] 155
- 14.1.1. Configuration Options 157
- 14.1.2. Cluster Management 157
- 14.2.3. Parameters in /vsm/ 163
- 14.3.1.1. Log destinations 166
- 14.3.1.2. Subloggers 167
- 14.3.1.3. Log levels 167
- 14.3.2. Per-Session Logging 168
- • -MaxDisconnectionTime s 176
- • -MaxConnectionTime s 176
- • -MaxIdleTime s 176
- Chapter 15. Hiveconf 179
- 15.1.3. Mounting Datasources 180
- 15.2. Hiveconf and ThinLinc 181
- Administration Interface 183
- 16.3. Modules 184
- 16.3.3. The VSM Module 185
- 16.3.3.1. Home 186
- 16.3.3.2. VSM Master 186
- 16.3.3.3. VSM Agent 186
- 16.3.4. The Profiles Module 187
- 16.3.5. The Locations Module 189
- 16.3.5.2. Locations 191
- 16.3.6.1. Application Groups 193
- 16.3.6.4. Menu Structure 193
- Desktop Customizer 197
- 17.2.1. Concepts 198
- 17.2.3. Handling Applications 199
- • Command 200
- • Path to Icon file 201
- • Command Startup Feedback 201
- /opt/kde3 205
- See Section 16.2 for details 207
- /vsm/tunnelservices 208
- SSH tunnel, SSH terminated.) 212
- C.1. Schema extensions 215
- /etc/ldap.conf 216
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