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soc:2009:pravin:journal:week6 [2009/07/02 14:14]
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soc:2009:pravin:journal:week6 [2009/07/04 08:41] (current)
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 Targets decided for this week are Targets decided for this week are
-  * Unordered List Item+  * Add fedora live CD to BKO 
 +  * Improve the user facing page of BKO 
 +  * Improve the boot time menu 
 + 
 +===== 29 - 30 July ===== 
 +  - Started to work on Fedora live CD 
 +  - Collected all basic stuff needed  
 +     - Live CD 
 +     - Initrd and kernel 
 +     - Kernel modules for networking 
 +  - It has taken unreasonably long time as fedora_11 lives cd was exceptionally slow on qemu for me, I couldn'​t get needed kernel modules from inside CD. 
 +     - I decided to migrate to kvm for better performance. but I was getting error ''​could not open /dev/kvm: No such file or directory''​ 
 +     - After breaking my head around for some time, it seems my brand new laptop does not have support for virtualization :-( 
 +     - For time being, I am using virtual-box,​ it works fast enough, but only problem with virtualBox is, virtual machine does not pick up the IP address using DHCP as it happens with qemu ''​ -net user''​ option. ​ This means that my all gpxe scripts which do use dhcp by default will not work any more :-( 
 +     - I have not yet fixed this problem of dhcp support in virtualbox, I have postponed the solution finding for this problem for time being. 
 +   
 + 
 +===== 1 - 2 July ===== 
 +  - Wrote script which can generate new modified initramfs automatically with everything added from original initramfs. 
 +  - Now, actual work of understanding /init script and understanding how they use iso image as root starts. 
 +  - Done with modifications in /​sbin/​real-init which will (hopefully) mount the httpfs partition over root. 
 +  - Initial runs were not very promising, when tried to boot this modified fedora live cd over BKO using qemu, it dropped me in rescue shell :!: 
 +     - There were few error messages in boot sequence 
 +        - ''​mount:​ only root can do that''​ 
 +        - ''​getKernelCmdLine:​ failed to open /​proc/​cmdline:​ No such file or directory''​ 
 +        - ''​creating initial /dev : only root can do that''​ 
 + 
 + 
 + 
 +===== 3 July ===== 
 +  - Pin-pointed the cause  
 +     - when I tried command ''​mount -t proc proc /​proc''​ It gave error saying ''​mount:​ only root can do that''​ 
 +     - But as this command is executed from within initrd, it is executed as root, so How can I get that error :?: 
 +     - With tip from AndyTim, it seemed that the initrd was created by non-root user, so even if those commands are executed by root, they don't have root privilages.  
 +        - It is strange in many ways, as initrd by non-root user works fine for ubuntu and other distributions I have tried. 
 +        - I suspect that selinux security policies are enforcing these extra rules as fedora is having selinux in enforcing mode. 
 +        - Anyways, creating initrd by root user does make sense in some ways. So, I will follow this for all distributions. 
 +   - The booting process has progressed, but now it is stuck at some other point. It just hangs without giving me rescue shell 
 +   - I don't even know if it has used httpfs, all my ''​echo''​ messages are lost in fast scrolling output of qemu, and I am not able to scroll back and see, what was happening. I need to find some way to be able to see previous outputs. of qemu. I miss that feature seriously in qemu. 
 + 
 +===== 4 July ===== 
 +  - I will need one of the two things to be able to do debugging properly for problem in hand. 
 +     - Scrolling support for qemu (so that I can see old outputs and my debug messages ) 
 +     - dhcp support in virtual box (<​del>​I presume that it is having some kind of scrolling support</​del>​ I tested and ''​ALT+PG_UP''​ does some scrolling up ) 
 +  - Started my day with trying to find how to scroll in qemu, but nothing promising came out. 
 +  - Both of above ways are time consuming, so I have resolved to use one odd method, taking screen-shots and then checking the old messages, only thing I can say about this method is that, it gets my job done. 
 +  - Now, coming back to the problem, I will log the progress with Red Hat [[Fedora11BKO|Here]] ​     
  
  

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