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  • Creating CNAME to delegated domain

    - by Starsky
    We are trying to configure F5 to do load balancing on 4 sub domains similar to this article... http://support.f5.com/kb/en-us/solutions/public/0000/200/sol277.html For Example prod.wip.example.com. NS F5NS1.example.com. prod.wip.example.com. NS F5NS2.example.com. test.wip.example.com. NS F5NS1.example.com. test.wip.example.com. NS F5NS2.example.com. Then we want to make cnames instead of delegating individual sub-domains, e.g. myapp.example.com CNAME prod.wip.example.com Microsoft DNS gives an error when I attempt to make the CNAME... dnscmd ns1 /recordadd example.com myapp CNAME myapp.prod.wip.example.com. Command failed: DNS_ERROR_NOT_ALLOWED_UNDER_DELEGATION 9563 (0000255b) The error makes perfect sense, but does anyone know of a way around it? Or are my NS records incorrect for this setup? Thank you, -Steve

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  • mystery Internet traffic to port 445

    - by Ben Collver
    Recently, I noticed traffic from the office network to TCP port 445 on the Internet [a]. Below are the Linux firewall log entries to Facebook's network [b] and Google's network [c]. I would like to identify the source of this traffic. My first guess is that Facebook and Google might be using multiple TCP ports for SSL load balancing. However, I could not confirm this based on the web proxy logs. What else might it be? [a] http://support.microsoft.com/kb/204279 [b] Sep 4 08:30:03 firewall01 kernel: IN=eth0 OUT=eth2 SRC=10.0.0.131 DST=69.171.237.34 LEN=52 TOS=0x00 PREC=0x00 TTL=127 ID=14287 DF PROTO=TCP SPT=51711 DPT=445 WINDOW=8192 RES=0x00 SYN URGP=0 [c] Aug 28 06:02:41 firewall01 kernel: IN=eth0 OUT=eth2 SRC=10.0.0.115 DST=173.194.33.47 LEN=52 TOS=0x00 PREC=0x00 TTL=127 ID=4558 DF PROTO=TCP SPT=49294 DPT=445 WINDOW=8192 RES=0x00 SYN URGP=0

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  • pdating modules on VPS [closed]

    - by tertle
    Been trying to install openVPN on a VPS but come into a few problems when trying to start the openvpn server. Service deferred error: IPTablesServiceBase: failed to run iptables-restore [status=1]: ['FATAL: Could not load /lib/modules/2.6.18-028stab070.14/modules.dep: No such file or directory', 'FATAL: Could not load /lib/modules/2.6.18-028stab070.14/modules.dep: No such file or directory', 'iptables-restore: line 46 failed']: internet/base:1175,internet/base:752,internet/process:45,internet/process:306,internet/_baseprocess:48,internet/process:775,internet/_baseprocess:60,svc/pp:116,svc/svcnotify:26,internet/defer:238,internet/defer:307,internet/defer:323,sagent/ipts:105,sagent/ipts:39,util/error:52,util/error:32 service failed to start due to unresolved dependencies: set(['user', 'iptables_openvpn']) service failed to start due to unresolved dependencies: set(['user', 'iptables_openvpn']) service failed to start due to unresolved dependencies: set(['iptables_openvpn']) Anyway so after a bit of playing around and some advice, I found that the linux kernal and modules don't match on my server. uname -r returns: 2.6.18-028stab070.14 and ls /lib/modules returns: 2.6.18-028stab070.7 The server is running OpenVZ and my container uses ubuntu 9.10. So my question is, is it possible for me to update my modules on a VPS and if so how would I do this, or is this something I'll need to try get my host to do? Thanks in advance.

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  • SharePoint 2010 Single Page Apps without a Master Page

    - by David Jacobus
    Originally posted on: http://geekswithblogs.net/djacobus/archive/2014/06/06/156827.aspxWell, maybe a stretch, but I am inclined to believe it is so.  I have been using  the JavaScript Client Object Model (JCSOM) for about 6 months now and I believe it can do about 80% of my job quickly without much fanfare.  When building sites in SharePoint no one wants the OOTB list views, etc. They want a custom look and feel!  I used to think in previous engagements that this would mean some custom server code or at least a data-form web part.   Since coming on-board in my current engagement, I have been forced because we don’t own the hosting site to come up with innovative ways to customize the UI of SharePoint.  We can push content via sandbox solutions and use JCSOM from within SharePoint Designer to do almost all customizations.  I have been using the following methodology to accomplish this: 1. Create an HTML file, which links CSS and JavaScript Files 2. Create and ASPX Web Part Page, Include a Content Editor Web Part and link to the HTML page created above.   So basically once it was done, I could copy , paste,  and rename those 4 items: CC, JS, HTML. ASPX and using MVVM just change the Model, View, and View-Model in the JavaScript file.  in about 5 minutes, I could create a completely new web part with SharePoint data.  Styling would take a little longer.  Some issues that would crop up: 1.  Multiple(s) of these web parts would not work well together on the same page (context). 2.  To separate the Web parts and context I would create a separate page for each web part and link them to a tabs layout via a Page Viewer web part or I frame.  Easy to do and not a problem but a big load problem as these web part pages even with minimal master had huge footprints.  (master page and page web part zones)   I kept thinking of my experience with SharePoint 2013 and apps!  The JavaScript was loaded from within the app, why can’t we do that in 2010 and skip the master page and web part zones. I thought at first, just link to sp.js but that didn’t work so I searched the web and found a link which did not work at all in my environment but helped me create a solution that would kudos to (Will). <!DOCTYPE html> <%@ Page %> <%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Import Namespace="Microsoft.SharePoint" %> <html> <head> <link rel="Stylesheet" type="text/css" href="../CSS/smoothness/jquery-ui-1.10.4.custom.min.css"> </head> <body > <form runat="server"> <!-- the following 5 js files are required to use CSOM --> <script src="/_layouts/1033/init.js" type="text/javascript" ></script> <script src="/_layouts/MicrosoftAjax.js" type="text/javascript" ></script> <script src="/_layouts/sp.core.js" type="text/javascript" ></script> <script src="/_layouts/sp.runtime.js" type="text/javascript" ></script> <script src="/_layouts/sp.js" type="text/javascript" ></script> <!-- include your app code --> <script src="../scripts/jquery-1.9.1.js" type="text/javascript" ></script> <script src="../Scripts/jquery-ui-1.10.3.custom.min.js" type="text/javascript"></script> <script src="../scripts/App.js" type="text/javascript" ></script> <div ID="Wrapper"> </div> <SharePoint:FormDigest ID="FormDigest1" runat="server"></SharePoint:FormDigest> </form> </body> </html> Notice that I have the scripts loaded within the body! I discovered this by accident in trying to get Will’s solution to work, it made this work just like normal JCSOM from the master page.  I am sure there are other ways to do this, but I am a full time developer, so I’ll let someone else investigate the alternatives.  I have an example page showing an Announcements list as a Booklet which is a JQuery Plug-In.  Here is the page source notice the footprint is light.   <!DOCTYPE html> <html> <head> <link rel="Stylesheet" type="text/css" href="../CSS/smoothness/jquery-ui-1.10.4.custom.min.css"> <link href="../CSS/jquery.booklet.latest.css" type="text/css" rel="stylesheet" media="screen, projection, tv" /> <link href="../CSS/bookletannouncement.css" type="text/css" rel="stylesheet" media="screen, projection, tv" /> </head> <body > <form name="ctl00" method="post" action="BookletAnnouncements2.aspx" onsubmit="javascript:return WebForm_OnSubmit();" id="ctl00"> <div> <input type="hidden" name="__REQUESTDIGEST" id="__REQUESTDIGEST" value="0x3384922A8349572E3D76DC68A3F7A0984CEC14CB9669817CCA584681B54417F7FDD579F940335DCEC95CFFAC78ADDD60420F7AA82F60A8BC1BB4B9B9A57F9309,06 Jun 2014 14:13:27 -0000" /> <input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUBMGRk20t+bh/NWY1sZwphwb24pIxjUbo=" /> </div> <script type="text/javascript"> //<![CDATA[ var g_presenceEnabled = true;var _fV4UI=true;var _spPageContextInfo = {webServerRelativeUrl: "\u002fsites\u002fDemo50\u002fTeamSite", webLanguage: 1033, currentLanguage: 1033, webUIVersion:4,pageListId:"{ee707b5f-e246-4246-9e55-8db11d09a8cb}",pageItemId:167,userId:1, alertsEnabled:false, siteServerRelativeUrl: "\u002fsites\u002fdemo50", allowSilverlightPrompt:'True'};//]]> </script> <script type="text/javascript" src="/_layouts/1033/init.js?rev=lEi61hsCxcBAfvfQNZA%2FsQ%3D%3D"></script> <script type="text/javascript"> //<![CDATA[ function WebForm_OnSubmit() { UpdateFormDigest('\u002fsites\u002fDemo50\u002fTeamSite', 1440000); return true; } //]]> </script> <!-- the following 5 js files are required to use CSOM --> <script src="/_layouts/1033/init.js"></script> <script src="/_layouts/MicrosoftAjax.js"></script> <script src="/_layouts/sp.core.js"></script> <script src="/_layouts/sp.runtime.js"></script> <script src="/_layouts/sp.js"></script> <!-- include your app code --> <script src="../scripts/jquery-1.9.1.js"></script> <script src="../Scripts/jquery-ui-1.10.3.custom.min.js" type="text/javascript"></script> <script src="../Scripts/jquery.easing.1.3.js"></script> <script src="../Scripts/jquery.booklet.latest.min.js"></script> <script src="../scripts/Announcementsbooklet.js"></script> <div ID="Accord"> </div> <script type="text/javascript"> //<![CDATA[ var _spFormDigestRefreshInterval = 1440000;//]]> </script> </form> </body> </html> Here is the source to make the booklet work: ExecuteOrDelayUntilScriptLoaded(retrieveListItems, "sp.js"); var context; var collListItem; var web; var listRootFolder; var oList; //retieve the list items from the host web function retrieveListItems() { context = SP.ClientContext.get_current(); web = context.get_web(); oList = context.get_web().get_lists().getByTitle('Announcements'); var camlQuery = new SP.CamlQuery(); camlQuery.set_viewXml('<View><RowLimit>10</RowLimit></View>'); collListItem = oList.getItems(camlQuery); listRootFolder = oList.get_rootFolder(); context.load(listRootFolder); context.load(web); context.load(collListItem); context.executeQueryAsync(onQuerySucceeded, onQueryFailed); } //Model object var Dev = function (id, title, body, expires, url) { var self = this; self.ID = id; self.Title = title; self.Body = body; self.Expires = expires; self.Url = url; } //View model var DevVM = new ListViewModel() function ListViewModel() { var self = this; self.items = new Array(); } function onQuerySucceeded(sender, args) { var listItemEnumerator = collListItem.getEnumerator(); while (listItemEnumerator.moveNext()) { var oListItem = listItemEnumerator.get_current(); var javaDate = oListItem.get_item('Expires'); var fmtExpires = javaDate.format('dd MMM yyyy'); var url = ""; var goodUrl = oListItem.get_item('Url'); if (goodUrl == null) { url = web.get_serverRelativeUrl() + "/Lists/Announcements/EditForm.aspx?ID=" + oListItem.get_item('ID'); } else { url = web.get_serverRelativeUrl() + oListItem.get_item('Url') } DevVM.items.push(new Dev(oListItem.get_item('ID'), oListItem.get_item('Title'), oListItem.get_item('Body'), fmtExpires, url)); } $.each(DevVM.items, function (index) { $("#Accord").append(createAccordNode(DevVM.items[index].Title, DevVM.items[index].Body, " Expires: " + DevVM.items[index].Expires, DevVM.items[index].Url)); }); $("#Accord").booklet(); } function createAccordNode(title, body, expires, url) { return ( $("<div><h3>" + title + "</h3><p><span class='titlespan'><a href='" + url + "'>" + title + "</a></span><span class='dicussionspan'>" + body + "</span><span class='expiresspan'>" + expires + "</span></p></div>") ); } function onQueryFailed(sender, args) { alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace()); } The idea behind this post is that this could be used to: 1.   Create landing pages that are very un-SharePoint like! 2.   Make lightweight pages that could be used in page viewer web part or I Frame. 3.  Utilize Deep Zoom Composer and Sea-Dragon/or Silver light I will be using this for much of my development work!

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  • JavaScript loaded external content SEO

    - by user005569871
    I wonder what is the best way to have Javascript loaded content indexed by search engines. I know that search engines don't execute Javascript, but I am thinking more of an progressive enchantment. I am creating a responsive website, and on the home page I will have some sections about most visited products and recommended product that I plan to load depending on the device detected. These products will be in sliders with thumbnail images and names of the products. If mobile is detected slider content will not load, ant the link to the external page will be shown. I know that external content will be indexed via link to those resources. Where will the users be directed from search in this case? To the external page or home page? Will it be bad for SEO if I show only product names on front page so they can be indexed and hide them with CSS? What is the best way to index that content and possibly direct users from search to home page? Also, i've seen the Ajax crawling but iI would like not to use that if there is any better way.

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  • How do I get wireless and video working on a Sony Vaio vpc-z21x9r

    - by Alex
    OS: Ubuntu 11.10 Kernel: 2.6.37.6 Laptop: sony vaio vpc-z21x9r The problem: I can't change level of screen backlight; also can't enable wi-fi. While using 3.0 kernel everything is ok, but the laptop discharges too quickly. Results for lspci 02:00.0 Network controller: Intel Corporation Centrino Wireless-N + WiMAX 6150 (rev 5f) VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) there is no wlan0 in ifconfig -a too. I've fount that kernel should already have drivers for this graphics controller, but when i load up in restore mode, it writes "fall" while trying to load up some video drivers. To change the level of backlight i've alrady tried: xbacklight -set XX , smartdimmer -s XX and got this init_ nvclock() failed! also sudo setpci -s 00:02.0 F4.B=XX with no results. As for wi-fi, i've found driver but i don't understand how to install it. Here it is How can I fix these problems? Thank you for your help and time! Also tried to fix problems with backlight writing GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_backlight=vendor Still no results. Is there any sense in recompiling kernel, I mean 2.6.37.6. Can it make any improvements in the situation?

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  • Configuring port forwarding on Fortigate 50B

    - by GomoX
    I can't for the life of me get port forwarding to work on my Fortigate 50B. I followed the setup tips described on this other SF thread with no success. The only specific difference I can find is we are using load balancing through 2 different internet uplinks. Is there any caveat specific to this scenario that I might be missing? If you need any specific additional information please ask because I think I have checked everything: Virtual IP mapping on external interface wan1 ACCEPT all from any on wan1 to the corresponding server on internal No seeming offending firewall rules (any specific pitfalls that I might want to check for?)

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  • Severe latency only on one machine and only when accessing intranet site

    - by Joe M.
    I have one desktop machine that is having consistently high latency only when trying to load a page from an intranet site. Using the Chrome Developer Tools, the site shows a "Waiting" time of 4-5 seconds each page load. Other machines have <50ms, and the problem machine loads regular internet sites with <1s latency, so the problem is only on one machine and only when accessing the intranet site. This is a small business and all the hosts are on 192.168.0.1/24 I would have suspected a connection issue with the problem machine but normal internet sites are not having latency. Then I would have looked at connection issues with the intranet web server but other machines are not having latency to it. What else can I look at to troubleshoot this?

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  • How to overcome politics of the net (Google translate code refuses to work from a specific region) [closed]

    - by Jawad
    Possible Duplicate: How to overcome politics of the net (Google translate code refuses to work from a specific region) I have this Web Site. It uses the Google Translate API (Can't post the link, does not open from this region) with the following code. <meta name="google-translate-customization" content="9f841e7780177523-3214ceb76f765f38-gc38c6fe6f9d06436-c"></meta> <script type="text/javascript"> function googleTranslateElementInit() { new google.translate.TranslateElement({pageLanguage: 'en'}, 'google_translate_element'); } </script> <script type="text/javascript" src="http://translate.google.com/translate_a/element.js?cb=googleTranslateElementInit"></script> The problem is since this, it just stopped working. On the site you can see that I had to actually remove the above from here, here, and here while left it here, here, here and here. This is so because the the web site "refuses" to load at all with the pages that have the code (i.e., from this region.) If I use Firefox Stealthy Plugin and open the site in Firefox, It works like a charm without any problems. But with Google Chrome, Apple Safari and Opera Web browser, the site does not load/open at all because of the Google translate. (I know this because If I remove the Google Translate Code, the site works/loads fine) It was one thing to program for "cross browser compatability" and alltogether another to program for "cross region compatability". What can I do to make sure that the site works from anywhere? Do I completely remove the Google Translate code and just have to do without the additional functionality or Do I look for alternatives like this or according to this?

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  • How to justify technology choice to customer?

    - by suslik
    When freelancing / contracting a customer will typically specify functional requirements, acceptance criteria, etc, and the implementation details are in the developer's hands. As a developer your technology choice is a balancing act between what you are most familiar with, technologically what the right tool appears to be, ease of finding coders with this skill and their expense, and a few other factors. I'm in a situation where I have evaluated my options and selected a somewhat obscure open source technology that I believe will get me there faster, easier, and be more maintanable in the long term. It's different, but I think that that is what the requirements call for. The customer has inquired about what I'm going to use to build the solution, and now they are concerned because they've never heard of it before. The reasons for my choice are mostly technical, whereas the customer isn't (but they know some buzzwords!). Explaining these technical reasons will not be easy, and I am not sure if that is the right way to approach this situation anyway. And that's my question: what is the right way to approach this situation so as to cause the least amount of headache for everyone involved?

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  • Snow Leopard, PHP, and MySQL

    - by Peter
    I have just installed Snow Leopard and now my PHP/MySQL program ends in a "Segmentation fault". I have been searching the web for a solution, I realize that there are some issues with SL/PHP/MySQL, but I have not found anything that works yet. I downloaded the binary MySQL package mysql-5.1.42-osx10.6-x86_64. I have updated the php.ini file as suggested at various posts. When I run PHP and connect to the MySQL server the behavior is a bit random. In many cases it works fine to connect and read data. In my specific case the PHP program constructs a LOAD DATA LOCAL INFILE ... statement to load data from a text file. It should do several such queries after each other in a loop. It works one time but the halts in a "Segmentation fault". The program worked fine in Leopard, but not now. My versions are: OS 10.6.2, PHP 5.3.0, MySQL 5.1.42

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  • Where to place the R code for R+Sweave+LaTeX workflow

    - by claytontstanley
    I spent the last week learning 3 new tools: R, Sweave, and LaTeX. One question that came to my mind though when working through my first project: Where do I place the majority of the R code? The tutorials that I read online placed the majority of the R code in the LaTeX .Rnw file. However, I find having a bunch of R calculations in the LaTeX file distracting. What I do find extremely helpful (of course) is to call out to R code in the LaTeX file and embed the result. So the workflow I've been using is to place 99% of my R code in my .R file. I run that file first, save a bunch of calculations as objects, and output the .Rout file once finished (to save the work). Then when running Sweave, I load up that .Rout file, so that I have the majority of my calculations already completed and in the Sweave R session. Then my LaTeX callouts to R are quite simple: Just give me the XTable stored in 'res.table', or give me the result of an already-computed calculation stored in the variable 'res'. So I push towards the minimal amount of R code in the LaTex file possible, to achieve the desired result (embedding stats results in the LaTeX writeup). Does anyone have any experience with this approach? I'm just worried I might run into trouble further down the line, when I start really trying to load up and leverage this workflow.

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  • Recent update killed unity 3d launcher

    - by Steve
    I am scratching my head on this one, a lot of things are still new to me. I updated 126 packages just now through the update manager, and upon reboot everything works fine except the unity launcher. It's just a dark space. The dash still works, as does the top panel and docky. When I try: unity --replace I end up with this and then an indefinite hang: (compiz:3689): GConf-CRITICAL **: gconf_client_add_dir: assertion `gconf_valid_key (dirname, NULL)' failed WARN 2012-09-23 02:18:29 unity.favorites FavoriteStoreGSettings.cpp:139 Unable to load GDesktopAppInfo for 'ubiquity-gtkui.desktop' WARN 2012-09-23 02:18:30 unity.favorites FavoriteStoreGSettings.cpp:139 Unable to load GDesktopAppInfo for 'ubuntuone-installer.desktop' ERROR 2012-09-23 02:18:30 unity.launcher.trashlaunchericon TrashLauncherIcon.cpp:62 Could not create file monitor for trash uri: Operation not supported Initializing unityshell options...done WARN 2012-09-23 02:18:31 unity.libindicator <unknown>:0 Desktop file '/usr/share/applications/libreoffice-writer.desktop' is using a deprecated format for its actions that will be dropped soon. WARN 2012-09-23 02:18:31 unity.libindicator <unknown>:0 Desktop file '/usr/share/applications/libreoffice-calc.desktop' is using a deprecated format for its actions that will be dropped soon. WARN 2012-09-23 02:18:31 unity.libindicator <unknown>:0 Desktop file '/usr/share/applications/libreoffice-impress.desktop' is using a deprecated format for its actions that will be dropped soon. Setting Update "main_menu_key" Setting Update "run_key" Unfortunately I cannot make heads or tails of this. Anyone, please help?

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  • Temp profile used when User logs in

    - by TJ
    One of my users logged into his computer, Windows XP, last night only to be meet with an error message that it could not load his profile and he will be logged in using a temporary profile. Typically when this happens I shut the machine down and restart and the correct profile will load when they log in again. Not this time. In the user profile options under computer-properties-Advanced-user profiles it show that there are three profiles with his name. Two are the exact same size with the same modified date (5/5/10) and the other is what I would expect size wise for a new profile with a modified date of today. What are my options to restore his profile?

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  • Unidirectional synchronization and admin back-end

    - by HTF
    I have Wordpress installation on two web nodes (load balancing/failover). There is unidirectional synchronization from server A to server B so any updates must occur on the first web node. I have a problem with Wordpress admin side. I'm using Nginx and the initial plan was to create rewrite rule from domain.com/wp-admin to wpadmin.domain.com - pointing to the first node. The problem is that the Wordpress installation can be access only via main domain and without extra subdomain there is no distinction between both web servers for the rewrite rule. Could you please advise if there is any other solution in this case. Regards

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  • Random users randomly being unable to connect to my static content domain

    - by jls33fsls
    I store all of my images, js, and css files on a separate domain to try and speed up page load times (it isn't a CDN, just a separate domain on the same server). This works fine for 99% of the users, 99% of the time. However, there are users that randomly are unable to connect to the static content domain for periods of 1-5 hours. They can go to the main site, but no images will load and everything is just white because no css is being loaded. If they go to the static content domain itself, the page just idles for a while and then times out with a blank white page, no error messages. I have no idea what could be causing this, and it hasn't happened to me, any ideas? I am running Apache on CentOS 5.5.

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  • What would be better in my case - apache, nginx or lighttpd ?

    - by The Devil
    Hey everybody, I'm writing a php site that's expected to get about 200-300 concurrent users browsing it. When initializing the application will load about 30 php classes, some 10 maybe 15 images and a couple of css files. So my question is what else can I do (except optimizing my code and using apc/eaccelerator for php) to get as close as possible to those numbers of concurrent users ? Currently we haven't chosen a server for the site to be hosted on but most probably it'll be a VPS Dual core + 2 or maybe 4gb ram. Is it possible for such a server to handle that load ? Also how could I test it myself and be sure that it'll be able to handle it ? Thanks in advance, Me

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  • Android Card Game Database for Deck Building

    - by Singularity222
    I am making a card game for Android where a player can choose from a selection of cards to build a deck that would contain around 60 cards. Currently, I have the entire database of cards created that the user can browse. The next step is allowing the user to select cards and create a deck with whatever cards they would like. I have a form where the user can search for specific cards based off a few different attributes. The search results are displayed in a List Activity. My thought about deck creation is to add the primary key of each card the user selects to a SQLite Database table with the amount they would like in the deck. This way as the user performs searches for cards they can see the state of the deck. Once the user decides to save the deck. I'll export the card list to XML and wipe the contents of the table. If the user wanted to make changes to the deck, they would load it, it would be parsed back into the table so they could make the changes. A similar situation would occur when the eventually load the deck to play a game. I'm just curious what the rest of you may think of this method. Currently, this is a personal project and I am the only one working on it. If I can figure out the best implementation before I even begin coding I'm hoping to save myself some time and trouble.

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  • How to upgrade a single instance's size without downtime

    - by Justin Meltzer
    I'm afraid there may not be a way to do this since we're not load balancing, but I'd like to know if there is any way to upgrade an EC2 EBS backed instance to a larger size without downtime. First of all, we have everything on one instance: both our app and our database (mongodb). This is along the lines i'm thinking: I know you can create snapshots of your EBS and an AMI of your instance. We already have an AMI and we create hourly snapshots. If I spin up a new separate instance of a larger size and then implement (not sure what the right term is here) the snapshots so that our database is up to date, then I could switch the A record of our domain from the old ip address to the new one. However, I'm afraid that after copying over the data from the snapshot, by the time it takes to change the A record and have that change propagate, the data could potentially be stale. Is there a way to prevent this, and is there a better way to do this than I am suggesting?

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  • Using PDO with MVC

    - by mister martin
    I asked this question at stackoverflow and received no response (closed as duplicate with no answer). I'm experimenting with OOP and I have the following basic MVC layout: class Model { // do database stuff } class View { public function load($filename, $data = array()) { if(!empty($data)) { extract($data); } require_once('views/header.php'); require_once("views/$filename"); require_once('views/footer.php'); } } class Controller { public $model; public $view; function __construct() { $this->model = new Model(); $this->view = new View(); // determine what page we're on $page = isset($_GET['view']) ? $_GET['view'] : 'home'; $this->display($page); } public function display($page) { switch($page) { case 'home': $this->view->load('home.php'); break; } } } These classes are brought together in my setup file: // start session session_start(); require_once('Model.php'); require_once('View.php'); require_once('Controller.php'); new Controller(); Now where do I place my database connection code and how do I pass the connection onto the model? try { $db = new PDO('mysql:host='.DB_HOST.';dbname='.DB_DATABASE.'', DB_USERNAME, DB_PASSWORD); $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); } catch(PDOException $err) { die($err->getMessage()); } I've read about Dependency Injection, factories and miscellaneous other design patterns talking about keeping SQL out of the model, but it's all over my head using abstract examples. Can someone please just show me a straight-forward practical example?

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  • Website Ethics / legal issues, image copyrights

    - by RailsN00b
    Ignoring the technical implementation of a website for a second, assume a website that is similar to twitter but with pictures. A user say something and puts a picture of whatever they said. As the nature of the internet, the images will most likely not be his/hers image. There are 2 options that I see for dealing with this: 1. The user will post a URL of the picture and the website will pull the picture from that URL everytime someone enters that page 2. The website will save the image in its own database of images and display the image to the visitors 'locally' The problem with option #1, while it saved storage, I see an issue with 'stealing' other websites bandwidth and if my website has many many visitors it could cost the image-hosting websites a lot and possible even crash it if the server can't handle the load. The problem with opion #2, while it saves the load to other websites, it practically takes pictures that could have copyright on them. Which option is better to implement in terms of legal issues and ethics? When do I need to contact another website to request permission to use the images from that site? Does anyone really care about that anymore. Where can I read about this?

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  • vpn/Openvpn as a cloud service

    - by 8pipe
    I am working on creating a small cloud (any number of EC2 instances that can be deployed based on load) implementing a VPN as a service for the company I'm working for. This is basically a project gathering together various vpn resources under one aegis as a cloud based service. As a user of openvpn, I'm somewhat familiar with being able to connect, but I'm looking for resources to start this project. Essentially I need to be able to: run a certificate authority and manage keys to distribute to coworkers build an ami that handles openvpn as a service balance the load if necessary among machines instances as needed Any suggestions for tutorials, things to avoid, roadblocks I might not be seeing from a novice perspective, etc. or just help in visualizing this is appreciated.

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  • Coldfusion server VERY slow page loads

    - by Kevin
    I inherited a windows server 2003 coldfusion 7 server a few weeks ago. Today a network cable was unplugged by accident from the server. On plugging it back in, pages were NOT loading at all. Rather, we were receiving a generic coldfusion error page. After restarting IIS several times and coldfusion even more than that, we finally got pages to start loading. However, the loading is extremely slow (30+ seconds) on pages that used to load instantly. Loading through the local network (IE localhost/cfide/administrator) does nothing to help the load speed. I am not familiar with IIS or Coldfusion (We're in the process of migrating this to Linux/PHP), so this is all new territory to me. I'm hoping someone may have experienced this issue in the past and can help me solve it. I'm happy to provide any additional information that might be necessary....I'm just not sure what information you might need in order to help. Thanks for your time.

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  • Debian Linux server hangs after a week or so

    - by Alex Flo
    I have 2 Debian Linux 6.0.4 servers that have a strange behaviour: after 5-7-10 days they hang. By this I mean the servers need to be restarted and before that ping won't answer. I've been struggling with this problem for a couple of months now and here's some thoughts/what I tried without being able to solve the problem. I changed the RAM on a server. Being 2 different servers I doubt that it could be something related to hardware as a 3rd identical server won't have this problem. I logged the server load and when it crashes the load is fine (quite low) I cannot find anything in the server logs, logs are fine till the server freezes. I don't have access to console unfortunately. While I have years of admin experience I have never encountered such an issue and right now I have no idea where else to investigate. If you have an idea of what I could try in order to fix the problem please share it with me:-)

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  • Running an rsync sweep before initializing lsyncd for synchronizing instances on EC2

    - by chrisallenlane
    My company uses several EC2 servers that will scale up and down according to the load we're receiving on our sites at any given moment. For the sake of our discussion here, we're running four instances: master.ourdomain.com - the file syncing "hub" of the webservers www1/www2/www3.ourdomain.com - three webservers which turn on or off as dictated by load I'm using lsyncd to keep all of the webservers in sync, and for the most part, it's working quite well. We're using a two-way syncing scheme, such that each webserver syncs against master, and master syncs against each webserver. Thus, the webservers are kept in sync, even though they aren't syncing against each other directly. I'm having one problem that I'm having a hard time solving,though. It occurs under these circumstances: When changes are made on master (perhaps after we've pushed new code), while some of the redundant webservers are sleeping And then a sleeping webserver wakes-up to absorb load Under that circumstance, I would like the following to happen: First, the newly-awoken webserver should sync its file structure - one way - against master, to bring its web application code up-to-date. Then, and only then, should it begin pushing changes in its file structure back to master. Unfortunately, currently, when a sleeping server is started, when lsyncd starts up, it pushes changes back to master before updating its own codebase, thus overwriting new code with old. Thus, before lsyncd starts, I'd like to be able to synchronize the webservers code against master's, perhaps by running a simple one-way rsync against the two machines. We're running lsyncd v.2, and I've tried to make this happen by using the "bash" configuration options documented in the lsyncd manual. My configuration file looks like this: settings = { logfile = "/home/user/log/lsyncd/log.txt", statusFile = "/home/user/log/lsyncd/status.txt", maxProcesses = 2, nodaemon = false, } bash = { onStartup = "rsync [email protected]:/home/user/www /home/user/www" } sync{ default.rsyncssh, source="/home/user/www/", host="[email protected]", targetdir="/home/user/www/", rsyncOpts="-ltus", excludeFrom="/home/user/conf/lsyncd/exclude" } (I've obviously redacted that file somewhat to protect the identities of the guilty.) Simply put, though, this just isn't working. How else might I approach this problem? I was looking at the --delete-after option in man rsync, but I don't think that does what I'm looking for. Are there any suggestions about how I should approach this problem? Thanks for lending your time and expertise. Chris

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