ansible notify

L most of the time in a production environment, you need to manage the configuration files, and the installation packages are only used when initializing the environment. Let's write a playbook to manage nginx configuration files. L mkdir-p/etc/ansible/nginx_config/roles/{new,old}/{files,handlers,vars,tasks}LwhichNewTo be used for the update, Oldused for rollback,FilesBelow isnginx.confand thevhostsdirectory,handlersRestartNginxCommands for servicesL

In peacetime operation and maintenance work sometimes need to be based on different remote nodes or different IP systems to do different configuration deployment. For example, ansible can do different processing of the configuration files on each node according to different IP addresses, and variables are needed here.You can define variables directly in the playbooks file:-Hosts:webservers vars:http_port:80A variable named Http_port is defined with a

According to one Daniel, Ansible is better than chef and puppet. Learn how to use ansible provisioning a vagrant managed virtual machine to start the EXPRESSJS server. GitHub Link: Https://github.com/kiwiwin/ansible-nodejs-demoCreate a EXPRESSJS project for a stay$ Express Nodejs-ansible$ CD Nodejs-

1. Create a MySQL playbook structure[Email protected] roles]# pwd/etc/ansible/roles[[email protected] roles]# mkdir-p Mysql_install/{files,handlers,meta, Tasks,templates,vars}[[email protected] roles]# tree mysql_install/mysql_install/├──files├──handlers├──meta├── Tasks├──templates└──vars2. Create the VARs you need to use[Email protected] roles]# cat/etc/ansible/roles/mysql_install/vars/main.ymlmysql_versio

Topology:650) this.width=650; "src=" https://s5.51cto.com/wyfs02/M00/8D/6D/wKioL1icKkeBk9nMAADZROqP5lk658.jpg "title=" b.jpg "alt=" Wkiol1ickkebk9nmaadzroqp5lk658.jpg "/>Topology Description: Two servers configured Keepalived+nginx to do the load Balance of the dual master model, with the host name LB1 and LB2 Two servers configure lamp to handle dynamic resource requests with host name LAMP1 and LAMP2 Two servers configured varnish as a static resource cache server with host na

This article source: http://sofar.blog.51cto.com/353572/1579894/ObjectiveA powerful configuration management solution written by Python. Although there are already many alternative configuration management solutions available, they have advantages and disadvantages, and ansible is characterized by its simplicity. One thing that makes Ansible unique in the mainstream configuration management system is that i

Ansible advantages over other automated operations tools (Saltstack, puppet):Ansible is a lightweight framework that enables a variety of functions based on individual modules, which can be developed on demandAgentless no need to install agent, according to the specific situation to establish a machineSupport Playbook ScriptPython language development, do operations are more acceptable languageOther and so

AnsiblePython-based Paramiko development, distributed, no client-side, lightweight, configuration syntax using Ymal and JINJA2Template language, stronger remote command to perform operationsAnsible working mechanismAnsible the Ansible module via the SSH protocol (or Kerberos, LDAP) on the management nodeLine, automatically delete after execution, can use SVN to manage the custom module and orchestrationFive componentsAnsible: CoreModules: Core modules

Deploy containers using atomic hosts, Ansible, and CockpitGuideAn atomic host from an atomic project is a lightweight container operating system that can run Linux containers in Docker format. It is specially tailored to improve efficiency and makes it an ideal choice for the Docker runtime system used in the cloud environment. We are lucky to find a good way to manage the containers running on the host: Cockpit. It is a GNU/Linux Server Remote Manage

Use ansible to compile and install the O M tools tmux and ansibletmux Experimental System: CentOS 6.6 _ x86_64 Prerequisites: Prepare the compiling environment in advance, and disable both firewall and selinux. Software Introduction: tmux is an excellent terminal multiplexing software, similar to GNU Screen, but comes from OpenBSD and adopts BSD authorization. The most intuitive advantage of using it is that after logging on to the remote host throug

From:http://www.ansible.cn/forum.php?mod=viewthreadtid=67extra=page%3d1today, I looked at the ansible, and if I took the time to use the shell, I could write one. Ansible need to use Sshpass, password is also saved in plaintext,not very safe. CenOS6.4, directly yum-y install ansible can be installed. FAQ 1, appears error:ansible requires a JSON module, none found

Wait (), notify (), and Notifyall () are methods in the object class: 12345678910111213141516171819202122232425 /*** Wakes up a single thread that is waiting on this object‘s* monitor. If any threads are waiting on this object, one of them* is chosen to be awakened. The choice is arbitrary and occurs at* the discretion of the implementation. A thread waits on an object‘s* monitor by calling one of the wait methods*/publicfinalnativevo

Wait,notify,notifyall is an instance method defined in the object class, used to control the state of threads, and when a thread is collaborating, everyone uses the Notify () or Notifyall () method. Where wait and notify is an important part of the Java synchronization mechanism, which needs to be combined with the Synchronized keyword to use, when calling an obj

) { e.printstacktrace (); } SYSTEM.OUT.PRINTLN ("Thread end ...") "); } }); T.start (); } Run Result: Start execution thread ... go to sleep state ... Thread End ...From the results of the operation, we can see that the program, although it was interrupted 3 seconds during the run, will continue executing the code after 3 seconds, until the end of the run. During sleep, the thread holds the moni

Before calling Wait (), the thread must obtain an object-level lock on the object, that is, the wait () method can only be invoked in the synchronization method or in the synchronization block. After the wait () method is executed, the current thread releases the lock and stops execution from wait (). The thread competes with other threads to regain the lock before returning from Wait (). Throws a illegalmonitorstateexception if the appropriate lock is not held when the wait () is invoked. The

Classic mode: Producer-Consumer model: When the queue is full, the producer needs to wait for the queue to have space to continue to put the goods inside, and during the waiting period, the producer must release the seizure rights to the critical resource (that is, the queue). Because producers do not release the use of critical resources, consumers will not be able to consume the goods in the queue, there is no space for the queue, then the producers have been waiting indefinitely. Therefore, i

An example of understanding wait () and Policy () The following is a post I saw on the csdn forum, which involves the understanding of synchronization, wait (), notify (), and other concepts, I tried to analyze the wait () and Policy () methods based on some original replies and related concepts in think in Java. Thank you for your advice.The problem is as follows:// Analyze this program and explain it, focusing on synchronized, wait (),

Introduction: Yesterday try to use Java to implement the producer consumer problem (Producer-consumer problem), in coding, the use of condition await and signalall method, and then by the way remembered wait and notify , a problem has been encountered in development: what are the timing for wait, notify, and other blocking and recovery? Google has been on the internet for a long time after the various blog

Wait and sleep differences: The same point : Calling the Wait,sleep method can be a thread that goes into a blocking state, yielding the CPU's execution rights. different points : 1.sleep You must specify a time, but the wait method can specify a time, or you can specify no time. The 2.wait method must be used in synchronization, but sleep is not necessarily used in synchronization.3. In synchronization, call the Sleep method to release the CPU execution, but does not release t

suspend () and resume () methods: Two methods are used, suspend () causes the thread to enter a blocking state, and does not automatically recover, it must be called by its corresponding resume () to enable the thread to re-enter the executable state. Typically, suspend () and resume () are used when waiting for the result of another thread: After the test finds that the result has not yet been generated, the thread is blocked and the other thread produces the result, calling resume () to restor