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Operating Systems Linux Ansible installation fails on standalone Oracle Linux Post 303036744 by Neo on Wednesday 10th of July 2019 06:05:41 AM
Old 07-10-2019
Try to increase your TCP/IP keepalive parameters:

Code:
Connection timed out after 30001 milliseconds


Linux has built-in support for keepalive.

You also need procfs support and sysctl support to be able to configure the kernel parameters at runtime.

README:

Quote:
The procedures involving keepalive use three user-driven variables:

tcp_keepalive_time

the interval between the last data packet sent (simple ACKs are not considered data) and the first keepalive probe; after the connection is marked to need keepalive, this counter is not used any further

tcp_keepalive_intvl

the interval between subsequential keepalive probes, regardless of what the connection has exchanged in the meantime

tcp_keepalive_probes

the number of unacknowledged probes to send before considering the connection dead and notifying the application layer
 

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CURLOPT_TCP_KEEPIDLE(3) 				     curl_easy_setopt options					   CURLOPT_TCP_KEEPIDLE(3)

NAME
CURLOPT_TCP_KEEPIDLE - set TCP keep-alive idle time wait SYNOPSIS
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_KEEPIDLE, long delay); DESCRIPTION
Pass a long. Sets the delay, in seconds, that the operating system will wait while the connection is idle before sending keepalive probes. Not all operating systems support this option. DEFAULT
60 PROTOCOLS
All EXAMPLE
CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "http://example.com"); /* enable TCP keep-alive for this transfer */ curl_easy_setopt(curl, CURLOPT_TCP_KEEPALIVE, 1L); /* set keep-alive idle time to 120 seconds */ curl_easy_setopt(curl, CURLOPT_TCP_KEEPIDLE, 120L); /* interval time between keep-alive probes: 60 seconds */ curl_easy_setopt(curl, CURLOPT_TCP_KEEPINTVL, 60L); curl_easy_perform(curl); } AVAILABILITY
Added in 7.25.0 RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. SEE ALSO
CURLOPT_TCP_KEEPALIVE(3), CURLOPT_TCP_KEEPINTVL(3), libcurl 7.54.0 January 02, 2017 CURLOPT_TCP_KEEPIDLE(3)
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