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Proper configuration management

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The Lounge What is on Your Mind? Proper configuration management
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Old 02-14-2016
Proper configuration management
Recently i started to work in new company. I will replace old admin who is going into retirement and he has been showing me his procedures for server, database and network administration.

From first point of view: there is absolutely no configuration management involved how they deploy software or patches. Yes there is test, development and production systems but I think this is not enough.

For example: I need to make a change. Log into production server, do what do you need to do and log out. Every admin has root access and so on.

My ex. employer had a strict policy how to apply changes in production environment. Every change involved creating system package (RPM, SYSVR4 or IPS), push that package into repository. From there I installed package to test server and if everything was good package would be installed into production. No admin could ever log into production environment.

I know there are tool like Puppet and Chef where I can specify a recipe what to do but I never used them for any serious work.

So my questions are:

1. Is it good to have only three environments (test, development, production) and no other configuration policy in medium-size enterprise?
2. Is it better to stick with ex. employer policy to bring all changes as system packages or is better to learn some tool like Chef?
3. How do you perform configuration management?
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LEARN ABOUT PLAN9

asadmin-start-instance

asadmin-start-instance(1AS)					   User Commands				       asadmin-start-instance(1AS)

NAME

       asadmin-start-instance, start-instance - starts a server instance and all the services associated with it

SYNOPSIS

       start-instance  [--user	admin_user]  [--password  admin_password] [--host local_host] [--port 4848] [--local=false] [--domain domain_name]
       [--debug=false] [--passwordfile filename] [--secure|-s] instance_name

       Use the start-instance command to start an instance with the instance name you specify. The start-instance command can be run both  locally
       and  remotely.  To  start  locally,  with  a  domain  name  identified, the named instance must already exist within that domain.  To start
       remotely, the administration server must be running on the hostname and port number specified. The user authenticates  using  the  password
       identified for the administration server.

OPTIONS

       --user		       administrative user associated for the instance.

       --password	       administrative password corresponding to the administrative user.

       --host		       host name of the machine hosting the administrative instance.

       --port		       administrative port number associated with the administrative host.

       --local		       determines if the command should delegate the request to administrative instance or run locally.

       --domain 	       name of the domain.

       --debug		       starts the instance in debug mode.

       --passwordfile	       file containing passwords appropriate for the command (e.g., administrative instance).

       --secure 	       if true, uses SSL/TLS to communicate with the administrative instance.

OPERANDS

       instance_name	       name of the instance to be started.

       Example 1: Using start-instance in local mode

       asadmin> start-instance --domain domain1 admin-server
       Instance admin-server started

       Where: the admin-server instance is started on the local domain1 domain.

       Example 2: Using start-instance in remote mode

       asadmin> start-instance --user admin --password bluestar --host localhost --port 4848 server1
       Instance server1 started

       Where: the server1 instance is started on the remote domain associated with the specified user, password, host, and port number.

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

INTERFACE EQUIVALENT

       Server Instance page

       asadmin-delete-instance(1AS),   asadmin-create-instance(1AS),   asadmin-stop-instance(1AS),  asadmin-restart-instance(1AS),  asadmin-start-
       appserv(1AS), asadmin-stop-appserv(1AS), asadmin-start-domain(1AS),.asadmin-stop-domain(1AS)

J2EE 1.4 SDK							    March 2004					       asadmin-start-instance(1AS)