Developers Club geek daily blog

Primary values of the secondary market. Arguments and facts

2 years, 4 months ago
Purchase of the server and its equipment — an important step for any organization. In the modern world data go worth its weight in gold therefore to reliability of this machine the most strict demands are made. It is logical that from the vendor as the countermeasure on similar requirements moves forward the considerable price. And as the best vendors are in the USA, this measure is calculated in a dollar equivalent. And the dollar rate, as well as technical progress, does not stand still, especially recently.

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Experience of testing of ScaleIO

2 years, 4 months ago

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The VNC installation of the server, and setup of its work over SSH

2 years, 4 months ago

Yes, for some reason not all clients want to work in such convenient and black terminal, the panel completely does not satisfy their esthetic requirements, and in general — "where my such darling and convenient VNC?".
question of a habit and taste

In this article an example of installation and the VNC server setup and a graphic cover (GUI) on the example of OC Debian 8 jessie will be reviewed.

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Server "second-hand" as crisis response solution

2 years, 4 months ago
In hard times many companies look for methods to save. And here excellent option can become / u-oborudovaniye, including servers. They are much cheaper new and at the same time are not less reliable. So why to pay more?

Server market: take-off and falling


And what occurs in the Russian server market? To understand tendencies, it is worth going deep into history a little. In 2008 growth of the server market in the Russian Federation, according to analysts of IDC, made 18%. Demand for these products among the small and medium enterprises increases, transition from the Russian equipment to products of the leading foreign vendors is observed.


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Multihome IPv4 in Linux

2 years, 4 months ago
Contents: how to make so that the computer answered on the Internet all the IP addresses on all the interfaces, each of which gateway by default. Concerns both servers, and desktops.

Key word: policy routing, source based routing

Lyrics: There are enough articles about policy routing in Linux. But they most often sort the general, thinner and difficult cases. I will sort the trivial scenario of the following type:



To our computer (server) well three interfaces. On each interface the gateway issued it IP (a statics or on dhcp, it is not important) and told "send all traffic to me".

If we leave this configuration as is, then the principle "who will be used the last got up, that and the default gateway". On the picture above if the last the lower interface (241) rises, then all traffic will go to it. If to our server the request for the first interface (188) comes, then the answer to it all the same will go on lower. If the router/provider has at least the minimum protection against counterfeit of addresses, then the answer is just dropnut as non-valid (from the point of view of 241.241.241.1 it sent from a network 241.241.241.0/24 a packet with src 188.188.188.188 that, obviously, should not be).

In other words, in normal option only one interface will work. To make a situation it is worse if addresses are received on dhcp, then updating of lease on other intefreysa can rewrite the gateway by default that means that that interface which worked will cease to work, and other interface will begin to work. Successful stable work to your server, so to speak.

Solution

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Practice: How to configure the HP ProLiant server and to prepare it for the OS installation

2 years, 4 months ago
Good afternoon, dear friends! Today I want to provide you the short practical overview devoted to a solution of a specific objective. Namely initial setup of the server and the Windows Server 2012 R2 OS installation by means of branded means of expansion of HPE. I will do it on the example of the HP ProLiant ML10v2 server popular now in the following configuration (school desks numbers 814483-421):

  • Tower server 4U
  • Intel Pentium G3240 processor
  • Built-in HP Dynamic SmartArray B120i RAID controller
  • In ours the case uses 4 disks Seagate LFF — they are not included in the package of the server

It is possible to look at total characteristics here.

Feature of this server, being the most budget representative of ProLiant family — lack of the built-in means of expansion of Intelligent Provisioning on the server. Therefore for its initial setup it is necessary to use the boot USB stick with image of HP Service Pack for ProLiant. The instruction will include such operations below:

  • Preparation and creation of the boot USB stick
  • The RAID setup on the server
  • Updating of program components of the server (firmwares)
  • Windows Server 2012R2 OS installation

All significant operations are followed by pictures. Awful quality of pictures serves for achievement of effect of presence :)

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collectd + front-end

2 years, 4 months ago


As practice shows — the big part of clients does not monitor the used resources, the services rented by them in any way (especially it is noticeable on the cheap services VPS from $3). That is, after installation of system and setup of software, necessary for the project, the future of the server is assigned to a case. And, when there are problems with operability of the server, information for the analysis has not enough.

Except the set and configured logging in atop (which also meets not often), logs of system, it would be desirable to have more information with which it is possible to work.

In this article procedure of installation and the collectd and collectd-web setup on the example of OS of Debian family will be described.

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And whether it is possible not to pay for a panel? "Coin"

2 years, 4 months ago
There comes the moment when virtual hosting to become insufficiently and your project and "to ask" on the server. Not always for new tasks you need a dedicated server at once, but at least it is worth beginning with the virtual server. At the same time many of you what as to save that begin to look for the partner(s) for lease of more productive service. Also, use of the free software is one of options of economy of the budget —.

Not to each of you, for example, will pleasantly sit in the console and to set necessary for software, or to make management of your websites through a touch the command line. At such moments many webmasters are come to the rescue by control bars a hosting and as it is pleasant when this panel — qualitative and free software. Quite recently we already told about one free software product, and today it will be a question of one more interesting control bar a hosting, namely of "coin" …


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30 years of work as the system administrator

2 years, 4 months ago
Sandra Henry-Stocker (Unix Dweeb, works in the TeleCommunication Systems company developing the innovative technical solutions at present). Looking back in the past, more than 30 years of work as the Unix system administrator later, I can tell that it was the long and interesting way. These years I of course did not execute one and too. Development of technologies was led to improbable changes in my work. It were impressive improvements in "iron" which I serviced, and the invention of new software tools which I studied and put into practice. For many years I took improbable pleasure from that how a lot of work I could make in the command line for identification and elimination of different problems and understanding of how in the best way to provide data protection of my employers. Within 30 years I worked with surprising people, at the same time was dismissed once, and also learned a lot of new about what works and does not work, both from the technical point of view, and from the point of view of career development.
The profession and all with it connected changes dramatically, but it always brought and will bring me the sea of pleasure.

Here my reflections about changes which I saw also those which still I will see.

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Let's Encrypt leaves in a public beta: HTTPS everywhere, to everyone, from now on and forever free of charge

2 years, 4 months ago
Let&39;s Encrypt

Let's Encrypt — it is the non-commercial initiative providing the free, automated and open CA (certificate authority — certificate authority) created ISRGby for the benefit of society:

  • free of charge: the owner of any domain name can use Let's Encrypt and receive entrusted (to read as "is recognized as any modern browser") the TLS certificate (TLS — the successor of SSL) absolutely free of charge;
  • it is automated: Let's Encrypt provides free and the free software (client) which, being configured on the Web server, can request completely automatically non-paid provided certificates of Let's Encrypt, automatically configure and update them;
  • safely: Let’s Encrypt is under construction as a platform for promotion the best practician of safety of TLSof both on the party of certificate authority (CA), and on the party of websites, helping administrators to configure Web servers properly;
  • it is transparent: information on release and a withdrawal of each certificate of Let's Encrypt is available quite and publicly so that anyone to study it will be able to make it;
  • freely: the protocols of interaction from CA allowing to automate processes of release and updating of certificates will be published as the open standard for the maximum implementation;
  • kooperativno: as well as any protocol which is the cornerstone of the Internet and the World Wide Web of Let's Encrypt is joint, uncontrollable any specific organization by the non-commercial project created bringing benefit to society.

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