// Loading the Filebeat index template into ElasticSearch as described in:
// https://www.elastic.co/guide/en/beats/filebeat/current/filebeat-getting-started.html#filebeat-template
func loadFilebeatIndexTemplate(esHost string) error {
d := deputy.Deputy{
Errors: deputy.FromStderr,
StdoutLog: func(b []byte) { log.Print(string(b)) },
}
cmd2Exc := exec.Command("curl", "-XPUT", esHost+"/_template/filebeat?pretty",
"-d@/etc/filebeat/filebeat.template.json")
if err := d.Run(cmd2Exc); err != nil {
return err
}
return nil
}
func Example() {
// Make a new deputy that'll return the data written to stderr as the error
// message, log everything written to stdout to this application's log, and
// timeout after 30 seconds.
d := deputy.Deputy{
Errors: deputy.FromStderr,
StdoutLog: func(b []byte) { log.Print(string(b)) },
Timeout: time.Second * 30,
}
if err := d.Run(exec.Command("foo")); err != nil {
log.Print(err)
}
}
// Mounting an S3 bucket under the mountpoint /mnt/s3 via s3fs-fuse.
func mountS3(bucket string) error {
d := deputy.Deputy{
Errors: deputy.FromStderr,
StdoutLog: func(b []byte) { log.Print(string(b)) },
Timeout: time.Second * 10,
}
cmd2Exc := exec.Command("s3fs", bucket, "/mnt/s3", "-o", "passwd_file=/root/aws_creds")
if err := d.Run(cmd2Exc); err != nil {
return err
}
return nil
}
// Starting the Filebeat service using the config file /etc/filebeat/filebeat.yml.
func startFilebeatAgent() error {
d := deputy.Deputy{
Errors: deputy.FromStderr,
StdoutLog: func(b []byte) { log.Print(string(b)) },
}
/*
Filebeat command line options explanations:
(Reference: https://www.elastic.co/guide/en/beats/filebeat/current/filebeat-command-line.html)
-e Log to stderr and disable syslog/file output.
-v Enable verbose output to show INFO-level messages.
The output of the filebeat agent will be visible in the Docker output due to redirecting STDERR to STDOUT
in Bash shell command.
*/
cmd2Exc := exec.Command("/bin/bash", "-c", "/usr/bin/filebeat -v -e -c /etc/filebeat/filebeat.yml 2>&1")
if err := d.Run(cmd2Exc); err != nil {
return err
}
return nil
}