mikluko

module natsrepro

go 1.25

require (
	github.com/nats-io/nats-server/v2 v2.15.0
	github.com/nats-io/nats.go v1.54.0
)

mikluko

puddle: a released resource stays unusable while the releasing goroutine keeps running

puddle.Pool (and the x/sync/semaphore it gates acquires on) hands a released resource to the first waiter by closing that waiter's channel. The Go runtime readies a goroutine unblocked by a channel operation into the waker's own P as runnext, where it runs only once the waker blocks, is preempted, or another P steals it, and runnext is the last thing a stealing P tries. So while every P is busy, a resource released by a goroutine that goes on doing CPU work is held by nobody until that work ends. On a pool of 4 with the releaser doing 2 ms of work after Release, that is ~1.85 ms per acquire, and throughput drops by a

mikluko

#!/usr/bin/sh python
import collections
import itertools
import os.path
import requests


Item = collections.namedtuple('Item', ['label', 'data'])

DIR = 'playlists'

mikluko

ssh-reagent () {
  for agent in /tmp/ssh-*/agent.*; do
    export SSH_AUTH_SOCK=$agent
    if ssh-add -l 2>&1 > /dev/null; then
      echo Found working SSH Agent:
      ssh-add -l
      return
    fi
  done
  echo Cannot find ssh agent - maybe you should reconnect and forward it?

mikluko

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAy5B0olC1RlzH1CrMukhRsnoTBhK/irnYLSJutJHullOeopTpqK+ph8ZKDKAaCqpAs2Y/Km3Kb1IvBiT9CDGPDh9N/PzvTbB9aSSUGsQQClxTCd0eTPmYwEi545lpVfrRCuAfEdcr4wd6FR3O0aEfxRXnIedFi22/XVXzIAvETr72mvJ/ED62D9Viri+nJsIOizpueV0PN+3OFU5CU/MpHuIrDm796mmlF3omeYpvCBnRTSXhZj1SsfMW4qpRaab9LDMptWTrxPAbwwWUQpHlUc0SI0zPjGUXILlNLGqkNNNpFXnn20KLeKY4EYgoLB3csak+hGnTX8hh8Hgnm46VIQ==

mikluko

set daemon 30 with start delay 60
set logfile syslog facility log_daemon
set httpd port 2812
    allow localhost

set mailserver localhost
set alert alert@example.com but not on { instance }

mail-format {
    From: noreply@example.com

mikluko

^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Set /proc/self/oom_adj to [[:digit:]]+$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Connection from [:[:xdigit:].]+ port [[:digit:]]{1,5}$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Found matching (RSA|DSA) key: [[:xdigit:]:]{47}$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Failed publickey for [[:alnum:]]+ from [:[:xdigit:].]+ port [[:digit:]]{1,5} ssh2$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Read error from remote host [.[:xdigit:]:]+: Connection timed out$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Read error from remote host [.[:xdigit:]:]+: Connection reset by peer$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: User child is on pid [[:digit:]]{1,5}$

mikluko

set mailserver localhost
set daemon 120 with start delay 240
set logfile syslog facility log_daemon
set httpd port 2812
    allow localhost

set alert noreply@example.com

check host internet with address 80.254.111.254
    if failed icmp type echo count 5 with timeout 30 seconds

mikluko

^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Set /proc/self/oom_adj to [[:digit:]]+$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Connection from [:[:xdigit:].]+ port [[:digit:]]{1,5}$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Found matching (RSA|DSA) key: [[:xdigit:]:]{47}$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Failed publickey for [[:alnum:]]+ from [:[:xdigit:].]+ port [[:digit:]]{1,5} ssh2$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Read error from remote host [.[:xdigit:]:]+: Connection timed out$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: User child is on pid [[:digit:]]{1,5}$

mikluko

^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ duplicity: Last full backup is too old, forcing full backup$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ duplicity: Local and Remote metadata are synchronized, no sync needed\.$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ duplicity: No old backup sets found, nothing deleted\.$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ duplicity: No extraneous files found, nothing deleted in cleanup\.$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ duplicity: Last full backup date: \w{3} \w{3} [ :[:digit:]]{16}$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ duplicity: --------------\[ Backup Statistics \]--------------$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ duplicity: -------------------------------------------------$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ duplicity: (StartTime|EndTime|ElapsedTime|SourceFiles|SourceFileSize|NewFiles|NewFileSize|DeletedFiles|ChangedFiles|ChangedFileSize|ChangedDeltaSize|DeltaEntries|RawDeltaSize|TotalDestinationSizeChange) .+$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+