Getting Started with Citrix ADC
Deploy a Citrix ADC VPX instance
Install a Citrix ADC VPX instance on Microsoft Hyper-V servers
Install a Citrix ADC VPX instance on Linux-KVM platform
Prerequisites for Installing Citrix ADC VPX Virtual Appliances on Linux-KVM Platform
Provisioning the Citrix ADC Virtual Appliance by using OpenStack
Provisioning the Citrix ADC Virtual Appliance by using the Virtual Machine Manager
反对figuring Citrix ADC Virtual Appliances to Use SR-IOV Network Interface
反对figuring Citrix ADC Virtual Appliances to use PCI Passthrough Network Interface
Provisioning the Citrix ADC Virtual Appliance by using the virsh Program
Provisioning the Citrix ADC Virtual Appliance with SR-IOV, on OpenStack
反对figuring a Citrix ADC VPX Instance on KVM to Use OVS DPDK-Based Host Interfaces
Deploy a Citrix ADC VPX instance on Microsoft Azure
Network architecture for Citrix ADC VPX instances on Microsoft Azure
反对figure multiple IP addresses for a Citrix ADC VPX standalone instance
反对figure a high-availability setup with multiple IP addresses and NICs
反对figure a high-availability setup with multiple IP addresses and NICs by using PowerShell commands
反对figure HA-INC nodes by using the Citrix high availability template with Azure ILB
Upgrade and downgrade a Citrix ADC appliance
Authentication, authorization, and auditing application traffic
反对figuring authentication, authorization, and auditing policies
反对figuring Authentication, authorization, and auditing with commonly used protocols
Use an on-premises Citrix Gateway as the identity provider for Citrix Cloud
Troubleshoot authentication issues in Citrix ADC and Citrix Gateway with aaad.debug module
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Persistence and persistent connections
Advanced load balancing settings
Gradually stepping up the load on a new service with virtual server–level slow start
Protect applications on protected servers against traffic surges
Graceful shutdown of services
Retrieve location details from user IP address using geolocation database
Use source IP address of the client when connecting to the server
Use client source IP address for backend communication in a v4-v6 load balancing configuration
Set a limit on number of requests per connection to the server
反对figure automatic state transition based on percentage health of bound services
Use case 2: Configure rule based persistence based on a name-value pair in a TCP byte stream
Use case 3: Configure load balancing in direct server return mode
Use case 6: Configure load balancing in DSR mode for IPv6 networks by using the TOS field
Use case 7: Configure load balancing in DSR mode by using IP Over IP
Use case 10: Load balancing of intrusion detection system servers
Use case 11: Isolating network traffic using listen policies
Use case 12: Configure Citrix Virtual Desktops for load balancing
Use case 13: Configure Citrix Virtual Apps for load balancing
Use case 14: ShareFile wizard for load balancing Citrix ShareFile
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反对figuring a CloudBridge Connector Tunnel between two Datacenters
反对figuring CloudBridge Connector between Datacenter and AWS Cloud
反对figuring a CloudBridge Connector Tunnel Between a Datacenter and Azure Cloud
反对figuring CloudBridge Connector Tunnel between Datacenter and SoftLayer Enterprise Cloud
反对figuring a CloudBridge Connector Tunnel Between a Citrix ADC Appliance and Cisco IOS Device
CloudBridge Connector Tunnel Diagnostics and Troubleshooting
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Graceful shutdown of services
During scheduled network outages such as system upgrades or hardware maintenance, you may have to close or disable some services. You can later enable the service by using the “enable service
command.
To avoid disrupting established sessions, you can place a service in the Transition Out of Service (TROFS) state by doing one of the following:
- Adding a TROFS code or string to the monitor—Configure the server to send a specific code or string in response to a monitor probe.
- Explicitly disable the service and:
- Set a delay (in seconds).
- Enable graceful shut down.
Adding a TROFS Code or String
If you bind only one monitor to a service, and the monitor is TROFS-enabled, it can place the service in the TROFS state on the basis of the server’s response to a monitor probe. This response is compared with the value in the trofsCode parameter for an HTTP monitor or the trofsString parameter for an HTTP-ECV or TCP-ECV monitor. If the code matches, the service is placed in the TROFS state. In this state, it continues to honor the persistent connections.
If multiple monitors are bound to a service, the effective state of the service is calculated on the basis of the state of all the monitors that are bound to the service. Upon receiving a TROFS response, the state of the TROFS-enabled monitor is considered as UP for the purpose of this calculation. For more information about how a Citrix ADC appliance designates a service as UP, seeSetting a Threshold Value for the Monitors Bound to a Service.
Important:
- 你可以绑定多个监控服务,但must not TROFS-enable more than one of them.
- You can convert a TROFS-enabled monitor to a monitor that is not TROFS-enabled, but not vice versa.
To configure a TROFS code or string in a monitor by using the command line interface
At the command prompt, type one of the following commands:
add lb monitor HTTP -trofsCode add lb monitor HTTP-ECV -trofsString add lb monitor TCP-ECV -trofsString
To modify the TROFS code or string by using the command line interface
At the command prompt, type one of the following commands:
set lb monitor HTTP -trofscode set lb monitor HTTP-ECV -trofsstring set lb monitor TCP-ECV -trofsstring
Note: You can use the set command only if a TROFS-enabled monitor was added earlier. You cannot use this command to set the TROFS code or string for a monitor that is not TROFS-enabled.
To configure a TROFS code or string in a monitor by using the configuration utility
- Navigate to Traffic Management > Load Balancing > Monitors.
- On the Monitors pane, click Add, and do one of the following:
- Select Type as HTTP, and specify a TROFS Code.
- Select Type as HTTP-ECV or TCP-ECV, and specify a TROFS String.
Disabling a Service
Often, however, you cannot estimate the amount of time needed for all the connections to a service to complete the existing transactions. If a transaction is unfinished when the wait time expires, shutting down the service may result in data loss. In this case, you can specify graceful shutdown for the service, so that the service is disabled only when all the current active client connections are closed by either the server or the client. See the following table for behavior if you specify a wait time in addition to graceful shutdown.
Persistence is maintained according to the specified method even if you enable graceful shutdown. The system continues to serve all the persistent clients, including new connections from the clients, unless the service is marked DOWN during the graceful shutdown state as a result of the checks made by a monitor.
The following table describes graceful shut down options.
State | Results |
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Graceful shutdown is enabled and a wait time is specified. | Service is shut down after the last of the current active client connections is served, even if the wait time has not expired. The appliance checks the status of the connections once every second. If the wait time expires, any open sessions are closed. |
Graceful shutdown is disabled and a wait time is specified. | Service is shut down only after the wait time expires, even if all established connections are served before expiration. |
Graceful shutdown is enabled and no wait time is specified. | Service is shut down only after the last of the previously established connections is served, regardless of the time taken to serve the last connection. |
Graceful shutdown is disabled and no wait time is specified. | No graceful shutdown. Service is shut down immediately after the disable option is chosen or the disable command is issued. (The default wait time is zero seconds.) |
To terminate existing connections when a service or a virtual server is marked DOWN, you can use the Down State Flush option. For more information, seeEnabling Cleanup of Virtual Server Connections.
To configure graceful shutdown for a service by using the command line interface
At the command prompt, type the following commands to shut down a service gracefully and verify the configuration:
disable service [] [-graceFul (YES|NO)] show service
Example:
> disable service svc1 6000 -graceFul YES Done >show service svc1 svc1 (10.102.80.41:80) - HTTP State: GOING OUT OF SERVICE (Graceful, Out Of Service in 5998 seconds) Last state change was at Mon Nov 15 22:44:15 2010 Time since last state change: 0 days, 00:00:01.160 ... Down state flush: ENABLED 1 bound monitor: 1) Monitor Name: tcp-default State: UP Weight: 1 Probes: 13898 Failed [Total: 0 Current: 0] Last response: Probe skipped - live traffic to service. Response Time: N/A Done >show service svc1 svc1 (10.102.80.41:80) - HTTP State: OUT OF SERVICE Last state change was at Mon Nov 15 22:44:19 2010 Time since last state change: 0 days, 00:00:03.250 Down state flush: ENABLED 1 bound monitor: 1) Monitor Name: tcp-default State: UNKNOWN Weight: 1 Probes: 13898 Failed [Total: 0 Current: 0] Last response: Probe skipped - service state OFS. Response Time: N/A Done
To configure graceful shutdown for a service by using the configuration utility
- Navigate to Traffic Management > Load Balancing > Services.
- Open the service, and from the Action list, click Disable. Enter a wait time, and select Graceful.
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