Yichun Zhang agentzh
agentzh
/ network-namespace-demo.sh
Last active
March 5, 2024 22:05
Create 2 network namespaces and bridge them and the default namespace together so that they can directly talk to each other via static IP addresses; also enable Internet access in all the namespaces via NAT.
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| #!/usr/bin/env bash | |
| set -x | |
| main_if=ens33 | |
| ping_count=1 | |
| echo 1 > /proc/sys/net/ipv4/ip_forward || exit 1 | |
| ip netns del ns1 > /dev/null 2>&1 |
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| [agentzh@fed34-min ~ 0 ]$ sudo "dnf" install -y "openresty-openssl111-asan" | |
| Last metadata expiration check: 0:00:01 ago on Tue May 11 12:26:10 2021. | |
| Dependencies resolved. | |
| ================================================================================================================================================================================== | |
| Package Architecture Version Repository Size | |
| ================================================================================================================================================================================== | |
| Installing: | |
| openresty-openssl111-asan x86_64 1.1.1i-5.fc34 openresty 2.1 M | |
| Installing dependencies: | |
| libasan x86_64 11.1.1-1.fc |
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| [V=browser-hello.mp4] Hi, I'm Matthew from OpenResty Inc. In this video, I'll demonstrate how to implement a "hello world" HTTP interface using OpenResty. | |
| First of all, we make sure we are using OpenResty's nginx. | |
| [delay=0] $ export PATH=/usr/local/openresty/nginx/sbin:$PATH | |
| $ which nginx | |
| [S] It's usually in this path. | |
| And then we go to the home directory. |
agentzh
/ or-lua-module.sp
Created
November 15, 2020 22:07
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| [V=browser-hello-module.mp4] Hello, I'm Matthew from OpenResty Inc. Today I'd demonstrate how to write your own Lua modules in your OpenResty applications, step by step. | |
| Let's put our simple OpenResty application in a new directory named 'test-module'. | |
| $ cd ~/ | |
| $ mkdir test-module/ | |
| $ cd test-module/ | |
| And then we create the sub-directory structure as always: |
agentzh
/ youtube-subscribe.nav
Last active
November 30, 2020 02:27
agentzh
/ rr-staprun-errors.tx
Created
June 14, 2020 08:07
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| $ sudo rr /opt/stap-plus/bin/staprun hello.ko | |
| rr: Saving execution to trace directory `/root/.local/share/rr/staprun-0'. | |
| [FATAL /home/agentzh/git/rr/rr/src/record_syscall.cc:5724:rec_process_syscall_arch()] | |
| (task 26471 (rec:26471) at time 394) | |
| -> Assertion `t->regs().syscall_result_signed() == -syscall_state.expect_errno' failed to hold. Expected ENOSYS for 'init_module' but got result 0 (errno SUCCESS); execution of syscall unsupported by rr | |
| Tail of trace dump: | |
| { | |
| real_time:2421511.598055 global_time:374, event:`SYSCALLBUF_FLUSH' tid:26471, ticks:453980 | |
| { syscall:'close', ret:0x0, size:0x10 } | |
| { syscall:'openat', ret:0x3, size:0x10 } |
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| From 100d5e81de0f34ebba38472e373dece4c3449ea4 Mon Sep 17 00:00:00 2001 | |
| From: "Yichun Zhang (agentzh)" <yichun@openresty.com> | |
| Date: Tue, 3 Mar 2020 15:15:30 -0800 | |
| Subject: [PATCH] Bug: proc_mem_rss() broken on older kernels lacking | |
| MM_SHMEMPAGES. | |
| This is a regression introduced in commit de253786000. | |
| --- | |
| buildrun.cxx | 3 +++ | |
| runtime/linux/autoconf-mm-shmempages.c | 5 +++++ |
agentzh
/ dns_server.lua
Created
August 18, 2016 19:33
My first hacked version of silly Lua DNS server atop NGINX (with patched ngx_stream_lua_module).
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| local bit = require "bit" | |
| local byte = string.byte | |
| local lshift = bit.lshift | |
| local rshift = bit.rshift | |
| local concat = table.concat | |
| local insert = table.insert | |
| local char = string.char | |
| local band = bit.band | |
| local sub = string.sub | |
| local gsub = string.gsub |
agentzh
/ gmail-stmp-tls.lua
Last active
August 5, 2019 03:41
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| local account = "blah@gmail.com" -- use your own gmail account | |
| local password = "password" -- if you enable 2-phase authentication, you need to | |
| -- generate and use a application-specific password here... | |
| local sender_name = "Jon Snow" | |
| local recipient = "recipient@foo.com" | |
| local recipient_name = "Arya Stark" | |
| local mail_title = "This is a test mail" | |
| local mail_body = [[<html><body><p>Mail Body...</body></html>]] |
agentzh
/ s390x-luajit2-test-failures.txt
Created
May 31, 2019 23:37
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| === test/unportable/math_special.lua | |
| Failed test when running /home/agentzh/git/luajit2-test-suite/s390x-luajit math_special.lua 1: 132 | |
| === test/ffi/ffi_enum.lua | |
| /opt/luajit-s390x/bin/luajit-2.1.0-beta3: ffi_enum.lua:53: too many callbacks | |
| Failed test when running /home/agentzh/git/luajit2-test-suite/s390x-luajit ffi_enum.lua 1: 256 | |
| === test/ffi/ffi_nosink.lua | |
| === test/ffi/ffi_jit_array.lua | |
| === test/ffi/ffi_parse_struct.lua | |
| === test/ffi/ffi_arith_ptr.lua | |
| === test/ffi/ffi_const.lua |
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