fuweid

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fuweid

Stream details:

When using the TTY setting is enabled in POST, the stream is the raw data from the process PTY and client’s stdin. When the TTY is disabled, then the stream is multiplexed to separate stdout and stderr.

The format is a Header and a Payload (frame).

HEADER

The header contains the information which the stream writes (stdout or stderr). It also contains the size of the associated frame encoded in the last four bytes (uint32).

fuweid

# vim: set filetype=ruby:

VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.vm.define "client" do |client|
    client.vm.box = "centos/7"
    
    client.vm.network "private_network",
      ip:                 "192.168.33.2",

fuweid

I recently happened upon an implementation of popen() (different API, same idea) using clone(2), and so I opened an issue requesting use of vfork(2) or posix_spawn() for portability. It turns out that on Linux there's an important advantage to using clone(2). I think I should capture the things I wrote there in a better place. A gist, a blog, whatever.

So here goes.

Long ago, I, like many Unix fans, thought that fork(2) and the fork-exec process spawning model were the greatest thing, and the Windows sucked for only having [exec*()](http://pubs.opengroup.org/onlinepubs/9699919

fuweid

// Snapshot service manages snapshots
service Snapshots {
  rpc Prepare(PrepareSnapshotRequest) returns (PrepareSnapshotResponse);
  rpc View(ViewSnapshotRequest) returns (ViewSnapshotResponse);
  rpc Mounts(MountsRequest) returns (MountsResponse);
  rpc Commit(CommitSnapshotRequest) returns (google.protobuf.Empty);
  rpc Remove(RemoveSnapshotRequest) returns (google.protobuf.Empty);
  rpc Stat(StatSnapshotRequest) returns (StatSnapshotResponse);
  rpc Update(UpdateSnapshotRequest) returns (UpdateSnapshotResponse);
  rpc List(ListSnapshotsRequest) returns (stream ListSnapshotsResponse);

fuweid

// based on https://github.com/AkihiroSuda/containerd-example-custom-daemon
package main

import (
	"fmt"
	"os"

	"github.com/containerd/containerd/cmd/containerd/command"

	// built-in plugins from cmd/containerd/builtins.go

fuweid

containerd 1.2.7

Welcome to the v1.2.7 release of containerd!

The seventh patch release for containerd 1.2 introduces OCI image descriptor annotation support and contains fixes for containerd shim logs, container stop/deletion, cri plugin and selinux.

It also contains several important bug fixes for goroutine and

fuweid

set minKeysPerPage = 2

function spill: node t
  if t is spilled
    return
  mark node t as spilled
  # if there are a lot of keys in one node but the node doesn't take more space,
  # there is no need to split the node. boltdb assumes that one page should
  # have two keys at least.
  #

fuweid

function splitIntoNodes: node t
  let nodes = []node{} # empty slice for node

  while ture
     if t is empty
       break

     t, next = call splitIntoTwos: node t

     appends t into nodes

fuweid

#include<stdio.h>
#include<signal.h>
#include<unistd.h>

int sigusr1_catched = 0;
int sigusr2_catched = 0;

void sigusrone_handler(int _){
    fprintf(stdout, "in handler: caught SIGUSR1\n");
    sigusr1_catched = 1;