syslog-ng Open Source Edition 3.25 - Administration Guide

http: Posting messages over HTTP without Java

Version 3.8 of syslog-ng OSE can directly post log messages to web services using the HTTP protocol, without having to use Java. The current implementation has the following limitations:

• Only the PUT and the POST methods are supported.

HTTPS connection, as well as password- and certificate-based authentication is supported.

If the server returns a status code beginning with 2 (for example, 200), syslog-ng OSE assumes the message was successfully sent. For other response codes, see HTTP destination options. You can override the behavior of syslog-ng OSE using the response-action() option.

destination d_https {
    http(
        [...]
        tls(
        ca-file("/<path-to-certificate-directory>/ca-crt.pem")
        ca-dir("/<path-to-certificate-directory>/")
        cert-file("/<path-to-certificate-directory>/server-crt.pem")
        key-file("/<path-to-certificate-directory>/server-key.pem")
            )
        [...]
    );
};

destination d_http {
    http(
        url("<web-service-IP-or-hostname>")
        method("<HTTP-method>")
        user-agent("<USER-AGENT-message-value>")
        user("<username>")
        password("<password>")
    );
};

The driver automatically uses the proxy settings of the host, there is no option to set it in the syslog-ng OSE configuration. Specifically, the driver uses the settings of the http_proxy and https_proxy environment variables.

destination d_http {
    http(
        url("http://127.0.0.1:8000")
        method("PUT")
        user-agent("syslog-ng User Agent")
        user("user")
        password("password")
        headers("HEADER1: header1", "HEADER2: header2")
        body("${ISODATE} ${MESSAGE}")
    );
};

log {
    source(s_file);
    destination(d_http);
    flags(flow-control);
};

You can also use the http() destination to forward log messages to Splunk using syslog-ng OSE.