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UNIX for Beginners Questions & Answers
Cluster a custom application
Post 303034528 by Peasant on Sunday 28th of April 2019 02:52:31 AM
04-28-2019
Moderator
Any systemd or init script can be implemented in linux cluster as a resource.
So, you will need to write one of those, it should be fairly simple reading the docs.
Be sure to use resource group, as resources in it will follow constraint order, start from first defined to last, stop from last defined to first.
But, applications are mostly load balanced not clustered in classic way, as stomp mentioned.
Can you elaborate more on your application receiving data on any port, does it listen on thousands of ports
Using opensource with haproxy and keepalived one can do great things with backend app balancing and failover using VRRP.
Fairly short and simple configuration, unlike linux cluster which is a complex product.
Keep it simple, stupid if you can.
Hope that helps.
Regards
Peasant.
So, you will need to write one of those, it should be fairly simple reading the docs.
Be sure to use resource group, as resources in it will follow constraint order, start from first defined to last, stop from last defined to first.
But, applications are mostly load balanced not clustered in classic way, as stomp mentioned.
Can you elaborate more on your application receiving data on any port, does it listen on thousands of ports
Using opensource with haproxy and keepalived one can do great things with backend app balancing and failover using VRRP.
Fairly short and simple configuration, unlike linux cluster which is a complex product.
Keep it simple, stupid if you can.
Hope that helps.
Regards
Peasant.
This User Gave Thanks to Peasant For This Post:
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LEARN ABOUT OPENSOLARIS
scds_get_rg_hostnames
scds_get_rg_hostnames(3HA) Sun Cluster HA and Data Services scds_get_rg_hostnames(3HA) NAME
scds_get_rg_hostnames - get the network resources used in a resource group SYNOPSIS
cc [flags...] -I /usr/cluster/include file -L /usr/cluster/lib -l dsdev #include <rgm/libdsdev.h> scha_err_t scds_get_rg_hostnames(char *resourcegroup_name, scds_net_resource_list_t **netresource_list DESCRIPTION
The scds_get_rg_hostnames() function retrieves a list of hostnames used by all the network resources in a resource group. This function returns a pointer to the list in netresource_list. It is possible for a resource group to contain no network resources or to contain resources that do not use network resources, so this function can return netresource_list set to NULL. You can pass the name of any resource group name in the system to scds_get_rg_hostnames(). Use the hostnames returned by scds_get_rg_host- names() to contact applications running in the specified resource group. Free the memory allocated and returned by this function with scds_free_net_list(). PARAMETERS
The following parameters are supported resourcegroup_name Name of the resource group for which data is to be retrieved netresource_list List of network resources used by the resource group RETURN VALUES
The scds_get_rg_hostnames() function returns the following: 0 The function succeeded. non-zero The function failed. ERRORS
SCHA_ERR_NOERR Function succeeded. See scha_calls(3HA) for a description of other error codes. FILES
/usr/cluster/include/rgm/libdsdev.h Include file /usr/cluster/lib/libdsdev.so Library ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscdev | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
scds_free_net_list(3HA), scds_get_rs_hostnames(3HA), scha_calls(3HA), attributes(5) Sun Cluster 3.2 14 Sep 2007 scds_get_rg_hostnames(3HA)