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Keepalived for Linux - 0 views

www.keepalived.org clustering HA failover keepalived
shared by crazylion lee on 15 Aug 14 - Cached
  • crazylion lee on 15 Aug 14
     
    Keepalived is a routing software written in C. The main goal of this project is to provide simple and robust facilities for loadbalancing and high-availability to Linux system and Linux based infrastructures. Loadbalancing framework relies on well-known and widely used Linux Virtual Server (IPVS) kernel module providing Layer4 loadbalancing. Keepalived implements a set of checkers to dynamically and adaptively maintain and manage loadbalanced server pool according their health. On the other hand high-availability is achieved by VRRP protocol. VRRP is a fundamental brick for router failover. In addition, Keepalived implements a set of hooks to the VRRP finite state machine providing low-level and high-speed protocol interactions. Keepalived frameworks can be used independently or all together to provide resilient infrastructures.
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Tenable Network Security - 0 views

www.tenable.com security network
shared by crazylion lee on 15 Aug 14 - No Cached
  • crazylion lee on 15 Aug 14
     
    弱點掃描用
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How to Use Docker on OS X: The Missing Guide | Viget - 0 views

viget.com/...cker-on-os-x-the-missing-guide docker mac system deploy
shared by 張 旭 on 25 Oct 14 - No Cached
  • Docker is a client-server application.
  • The Docker server is a daemon that does all the heavy lifting: building and downloading images, starting and stopping containers, and the like. It exposes a REST API for remote management.
  • The Docker client is a command line program that communicates with the Docker server using the REST API.
  • ...9 more annotations...
  • interact with Docker by using the client to send commands to the server.
  • The machine running the Docker server is called the Docker host
  • Docker uses features only available to Linux, that machine must be running Linux (more specifically, the Linux kernel).
  • boot2docker is a “lightweight Linux distribution made specifically to run Docker containers.”
  • Docker server will run inside our boot2docker VM
  • boot2docker, not OS X, is the Docker host, not OS X.
  • Docker mounts volumes from the boot2docker VM, not from OS X
  • initialize boot2docker (we only have to do this once):
  • The Docker client assumes the Docker host is the current machine. We need to tell it to use our boot2docker VM by setting the DOCKER_HOST environment variable
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How To Install and Use Docker: Getting Started | DigitalOcean - 0 views

www.digitalocean.com/...and-use-docker-getting-started docker system deploy
shared by 張 旭 on 26 Oct 14 - No Cached
  • docker as a project offers you the complete set of higher-level tools to carry everything that forms an application across systems and machines - virtual or physical - and brings along loads more of great benefits with it
  • docker daemon: used to manage docker (LXC) containers on the host it runs
  • docker CLI: used to command and communicate with the docker daemon
  • ...20 more annotations...
  • containers: directories containing everything-your-application
  • images: snapshots of containers or base OS (e.g. Ubuntu) images
  • Dockerfiles: scripts automating the building process of images
  • Docker containers are basically directories which can be packed (e.g. tar-archived) like any other, then shared and run across various different machines and platforms (hosts).
  • Linux Containers can be defined as a combination various kernel-level features (i.e. things that Linux-kernel can do) which allow management of applications (and resources they use) contained within their own environment
  • Each container is layered like an onion and each action taken within a container consists of putting another block (which actually translates to a simple change within the file system) on top of the previous one.
  • Each docker container starts from a docker image which forms the base for other applications and layers to come.
  • Docker images constitute the base of docker containers from which everything starts to form
  • a solid, consistent and dependable base with everything that is needed to run the applications
  • As more layers (tools, applications etc.) are added on top of the base, new images can be formed by committing these changes.
  • a Dockerfile for automated image building
  • Dockerfiles are scripts containing a successive series of instructions, directions, and commands which are to be executed to form a new docker image.
  • As you work with a container and continue to perform actions on it (e.g. download and install software, configure files etc.), to have it keep its state, you need to “commit”.
  • Please remember to “commit” all your changes.
  • When you "run" any process using an image, in return, you will have a container.
  • When the process is not actively running, this container will be a non-running container. Nonetheless, all of them will reside on your system until you remove them via rm command.
  • To create a new container, you need to use a base image and specify a command to run.
  • you can not change the command you run after having created a container (hence specifying one during "creation")
  • If you would like to save the progress and changes you made with a container, you can use “commit”
  • turns your container to an image
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Run Reference - Docker Documentation - 0 views

docs.docker.com/run docker system deploy
shared by 張 旭 on 29 Oct 14 - No Cached
  • In detached mode (-d=true or just -d), all I/O should be done through network connections or shared volumes because the container is no longer listening to the command line where you executed docker run.
  • start the process in the container and attach the console to the process's standard input, output, and standard error. It can even pretend to be a TTY (this is what most command line executables expect) and pass along signals.
  • For interactive processes (like a shell) you will typically want a tty as well as persistent standard input (STDIN), so you'll use -i -t together in most interactive cases.
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Baseimage-docker: A minimal Ubuntu base image modified for Docker-friendliness - 0 views

phusion.github.io/baseimage-docker docker base system linux
shared by 張 旭 on 29 Oct 14 - No Cached
  • We encourage you to use multiple processes.
  • Baseimage-docker is a special Docker image that is configured for correct use within Docker containers.
  • A proper Unix system should run all kinds of important system services.
  • ...16 more annotations...
  • You're not running them, you're only running your app.
  • You have Ubuntu installed in Docker. The files are there. But that doesn't mean Ubuntu's running as it should.
  • The only processes that will be running inside the container is the CMD command, and all processes that it spawns.
  • When your Docker container starts, only the CMD command is run.
  • Ubuntu is not designed to be run inside Docker
  • When a system is started, the first process in the system is called the init process, with PID 1. The system halts when this processs halts.
  • If your init process is your app, then it'll probably only shut down itself, not all the other processes in the container.
  • Docker runs fine with multiple processes in a container.
  • Baseimage-docker encourages you to run multiple processes through the use of runit.
  • Runit (written in C) is much lighter weight than supervisord (written in Python).
  • a Docker container, which is a locked down environment with e.g. no direct access to many kernel resources.
  • Used for service supervision and management.
  • A custom tool for running a command as another user.
  • add additional daemons (e.g. your own app) to the image by creating runit entries.
  • write a small shell script which runs your daemon, and runit will keep it up and running for you, restarting it when it crashes, etc.
  • the shell script must run the daemon without letting it daemonize/fork it.

PsySH - 0 views

psysh.org php debug toolkit
shared by 張 旭 on 30 Oct 14 - No Cached
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Phabricator - 0 views

phabricator.org PHP facebook codereview
shared by crazylion lee on 31 Oct 14 - No Cached
  • crazylion lee on 31 Oct 14
     
    Phabricator is a collection of open source web applications that help software companies build better software.
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Authentication, Permissions and Roles in Rails with Devise, CanCan and Role Model | Phase2 - 0 views

www.phase2technology.com/...h-devise-cancan-and-role-model rails devise cancan login authentication
shared by 張 旭 on 02 Nov 14 - No Cached
  • Devise is a modular user authentication system
  • just gradually investigating the components you need for your app and configuring them as you need
  • define permissions
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Fluentd | Open Source Data Collector - 0 views

www.fluentd.org logging log sysadmin
shared by crazylion lee on 16 Nov 14 - No Cached
  • crazylion lee on 16 Nov 14
     
    Fluentd is an open source data collector for unified logging layer. Fluentd allows you to unify data collection and consumption for a better use and understanding of data.
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Sysdig | Home - 0 views

www.sysdig.org linux sysadmin strace debug bug
shared by crazylion lee on 17 Nov 14 - No Cached
  • crazylion lee on 17 Nov 14
     
    A New System Troubleshooting Tool Built for the Way You Work
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jvehent/cipherscan - 0 views

github.com/cipherscan https ssl
shared by crazylion lee on 20 Nov 14 - No Cached
  • crazylion lee on 20 Nov 14
     
    "A very simple way to find out which SSL ciphersuites are supported by a target."
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