robbmanes

#!/bin/bash

# rh-container-registry.sh
# Test functionality of Red Hat Container Registries using pure HTTP/S.
# Useful for determining issues when/if behind proxies, load balancers,
# or other in-the-middle network devices.

# For more information on using Red Hat Container Registries, please see
# the following:
# https://access.redhat.com/RegistryAuthentication

robbmanes

# unmount-watcher.stp
# Watches for filesystem unmounts and prints additional information about them.
# Authored by Robb Manes <[email protected]>

# Execute by running:
#  stap unmount-watcher.stp > unmount-watcher.out

# In containerized environments, the unmounting process may belong to a different process namespace, so it's useful to print the
# entire tree to determine where it came from.
# This is borrowed from https://sourceware.org/systemtap/examples/network/connect_stat.stp

robbmanes

import sys
import time


def usage():
    msg = '''
shmem_test_tool.py
==================
Utility for testing Python multiprocessing shared memory segments.
Note this is NOT the same as IPCS SHMEM segments in Linux/Unix.

robbmanes

# unmount-watcher.stp
# Watches for filesystem unmounts and prints additional information about them.
# Authored by Robb Manes <[email protected]>

# Execute by running:
#  stap unmount-watcher.stp > unmount-watcher.out

# In containerized environments, the unmounting process may belong to a different process namespace, so it's useful to print the
# entire tree to determine where it came from.
# This is borrowed from https://sourceware.org/systemtap/examples/network/connect_stat.stp

robbmanes

obj-m += bigdummy.o

all:
	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:
	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

robbmanes

#!/bin/bash
CONTAINER_NAME="nginx"
ENDPOINT="localhost:8080/v3.0.0"

function section {
        echo ""
        echo $1
        printf -v UNDERLINE "%-${#1}s" '='
        echo "${UNDERLINE// /=}"
}

robbmanes

#!/usr/bin/env stap

probe begin {
        printf("Watching for signal(9) and reporting sender and receiver statuses...\n");
}

probe signal.syskill {
        if(sig == 9) {
                printf("[%s] SEND===> PID %d (%s) sent signal %d (%s) to PID %d (%s)\n",
                        ctime(gettimeofday_s()),

robbmanes

#include <stdio.h>
#include <sys/io.h>
#include <errno.h>

#define LEVEL 3

int main(int argc, char **argv)
{
        int rc;
        rc = iopl(LEVEL);

robbmanes

server {
        listen  80;
        listen [::]:80;
        server_name     localhost;

        location / {
                root /usr/share/nginx/html;
                index index.html index.htm;
        }

robbmanes

import logging
import socket
import sys
import threading
import time

CLIENT_CONN_ADDR="127.0.0.1"
CLIENT_NUM_CONNS=10
SERVER_PORT=8888
SERVER_SYN_BACKLOG=128