1 | Installing a Scripts guest on a Xen host |
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2 | ---------------------------------------- |
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3 | |
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4 | 1. Create the LVS partitions that the Scripts guest will use. |
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5 | |
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6 | Our classic setup is 50GB for the main, root partition (/) and |
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7 | 10GB for our swap. You can consult what things look like |
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8 | by using `lvdisplay`. Our naming convention is server-name-root |
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9 | and server-name-swap. |
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10 | |
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11 | Creating new LVS partitions is done with `lvcreate`: |
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12 | |
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13 | # Example values: |
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14 | # SERVERNAME=whole-enchilada |
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15 | # HOSTNAME=jay-leno |
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16 | lvcreate -n $SERVERNAME-root $HOSTNAME --size 50.00G |
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17 | lvcreate -n $SERVERNAME-swap $HOSTNAME --size 10.00G |
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18 | |
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19 | 2. Acquire the network installation media for Fedora. |
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20 | |
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21 | Normally, you would download an ISO and kick off an installation |
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22 | by burning it to a CD and booting off of that. Since we would like |
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23 | to make as minimal a Fedora install as possible, we use a different |
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24 | method. [XXX: Why do we actually do it this way? It seems kind |
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25 | of convoluted] |
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26 | |
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27 | First, we need to create an appropriate installation directory, |
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28 | which contains the necessary kernel images and bootstrapping code. |
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29 | Navigate to a Fedora mirrors website, and find the correct release |
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30 | from the linux/releases directory, then grab the contents of |
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31 | Fedora/x86_64/os/isolinux. For example, getting the Fedora 13 installer |
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32 | from mirrors.mit.edu would be: |
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33 | |
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34 | mkdir ~/f13-install |
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35 | cd ~/f13-install |
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36 | wget -r -nd ftp://mirrors.mit.edu/fedora/linux/releases/13/Fedora/x86_64/os/isolinux/ |
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37 | |
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38 | You can then spin up a Xen image for installation with: |
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39 | |
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40 | xm create scripts-server machine_name=$HOSTNAME install=f13 |
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41 | |
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42 | Note that the -install suffix was dropped. Get a console with `xm |
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43 | console`. |
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44 | |
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45 | 3. Tell Fedora where to get the real installer. |
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46 | |
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47 | You will now be in a curses installer interface. Since you are doing |
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48 | a network install, you will need to configure your network and specify |
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49 | the URL to install. Find the static hostname that you are planning |
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50 | to install to and get its information with: |
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51 | |
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52 | stella $HOSTNAME |
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53 | |
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54 | Manually configure its IP, disabling IPv6 for now [XXX I don't know how |
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55 | to configure that]. The network mask is 16, and you can check |
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56 | '/etc/resolv.conf' if you don't remember what MIT's DNS servers are. |
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57 | |
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58 | It will then ask you for an installation image. Continuing with our |
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59 | F13 mirrors.mit.edu, the URL will look something like: |
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60 | |
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61 | ftp://mirrors.mit.edu/fedora/linux/releases/13/Fedora/x86_64/os |
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62 | |
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63 | 4. Use VNC |
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64 | |
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65 | At this point, Fedora will ask you whether or not you want to use VNC |
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66 | to continue the installation. Because Scripts has an unusual disk |
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67 | image setup, you will want to answer yes. [XXX: Unfortunately, this puts |
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68 | the VNC session on MITnet, so make sure you use a good password, and |
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69 | we should figure out to make it not do that]. Grab your favorite |
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70 | VNC client and login to $HOSTNAME:1 |
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71 | |
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72 | 5. Installation in VNC |
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73 | |
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74 | 5.1. Disks to use |
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75 | |
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76 | We don't have any exotic devices (we did that at the host level, |
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77 | recall), so you can use normal configuration. The scripts-server Xen |
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78 | configuration will have automatically selected the LVS partitions you |
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79 | created in Step 1, and you want both of them. |
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80 | |
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81 | 5.2. Host |
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82 | |
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83 | The default hostname is all caps: we use lower-case, so lower-case the |
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84 | name before proceeding. |
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85 | |
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86 | 5.3. Timezone |
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87 | |
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88 | Self explanatory |
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89 | |
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90 | 5.4. Root password |
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91 | |
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92 | Use Scripts root password for a real install, and fake password |
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93 | otherwise. [XXX: Insecure over VNC? Argh!] |
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94 | |
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95 | 5.5 Formatting the disks |
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96 | |
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97 | You can find out what our existing setup looks like by consulting |
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98 | '/etc/fstab'. |
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99 | |
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100 | Select Custom, and select both disks for formatting. Setup the larger |
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101 | disk as the boot partition. Configure the partitions as follows: |
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102 | |
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103 | 50GB |
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104 | Standard Partition |
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105 | Mount Point: / |
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106 | File System Type: ext3 (the default as of F13 is ext4, which |
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107 | cannot be mounted by the hosts and thus should not be used!) |
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108 | Additional Size Options: Fill to maximum allowable size (the |
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109 | Size parameter will not do anything in that case) |
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110 | Force to be primary partition |
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111 | 10GB |
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112 | Standard Partition |
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113 | File System Type: swap |
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114 | Additional Size Options: Fill to maximum allowable size |
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115 | |
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116 | 5.6 Bootloader |
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117 | |
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118 | Defaults are fine. |
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119 | |
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120 | 5.7 Installation |
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121 | |
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122 | Do a minimal install (we will proceed to install the packages we care |
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123 | about), and add the normal F13 repository (testing and updates will be |
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124 | added when we bring in our /etc configuration). Similarly, we will |
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125 | install the software we want later, so there is no need to do that now. |
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126 | |
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127 | 5.8 Reboot |
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128 | |
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129 | When the install finishes, it will ask you to reboot. This is fine, but |
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130 | since we created the VM image with install, upon reboot it will ask us |
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131 | to install again. Let it reboot, then destroy the virtual machine. |
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132 | |
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133 | xm destroy $SERVERNAME |
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134 | |
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135 | 6. New World Order |
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136 | |
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137 | Start up the VM without the install flag: |
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138 | |
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139 | xm create scripts-server machine_name=$SERVERNAME |
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140 | |
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141 | Use xm console to get a terminal, and proceed with the official install |
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142 | instructions. |
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143 | |
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144 | xm console $SERVERNAME |
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