1 ========== Introduction ==========
4 1. Get yourself a working Xen dom0 setup, eg according to
5 https://wiki.ubuntu.com/XenOnEdgy
6 2. Configure adtxenlvm:
7 - assign a fixed IP address for the host and the testbed
8 - create DNS entries (forward and reverse)
9 for the testbed hostname edgy.adt.<your.domain.here>
10 - read below about settings you might want to set
11 creating /etc/autopkgtest/xenlvm_adt_config if needed
13 4. adt-xenlvm-with-testbed
14 5. adt-xenlvm-on-testbed
16 In some more detail, there are four main programs provided:
18 adt-xenlvm-setup [<config settings>]
19 Creates the snapshot. Broadly speaking, does the following:
20 - deletes any existing snapshot, virtual machine, etc.
21 - creates a new lvm volume and filesystem for the snapshot base
22 - runs debootstrap to install a system into the new filesystem
23 - makes necessary config changes to the testbed and the host
24 - boots the testbed and waits for it to start
25 - freezes the testbed into a snapshot file
26 After this, you can run with-testbed.
28 adt-xenlvm-with-testbed [<config settings>] [<master> [<args...>]]
29 Starts the testbed and runs <master> _on the HOST_. When
30 <master> finishes, the testbed state will be discarded. While
31 <master> is running, you can interact with the testbed. If
32 <master> is not specified, you get an interactive shell.
34 adt-xenlvm-on-testbed [<config settings>] [<command and args>]
35 Runs <command and args> on the running testbed. A <master>
36 child of adt-xenlvm-with-testbed must be running, or the
37 behaviour is not defined. However, adt-xenlvm-on-testbed does
38 not need to be a descendent of adt-xenlvm-with-testbed.
39 The arguments <command and args> are passed to ssh verbatim
40 and are therefore subject to ssh's unpleasant mangling.
42 adt-xenlvm-cleanup [<config settings>]
43 Cleans up any running testbed state. This is not normally
44 needed, as adt-xenlvm-with-testbed and adt-xenlvm-setup run it
45 at appropriate moments. However, if one of these should fail
46 and it is desirable to reclaim any resources used by the
47 testbed, cleanup will do this job.
49 Note that there is NO LOCKING. If you run more than one of either
50 adt-xenlvm-with-testbed or adt-xenlvm-setup (or one of each)
51 simultaneously, the behaviour is not defined, except that the host
52 will definitely not be trashed, and just two or more copies of
53 adt-xenlvm-with-testbed at once has no bad effects that
54 adt-xenlvm-cleanup won't fix.
57 ========== Configuration ==========
59 The configuration is read as follows:
60 1. set all variables whose defaults are fixed strings to
61 those built-in default values
62 2. process the command line arguments
63 3. read the user configuration file (sourced by bash)
64 this file must not use fds 10 onwards, which may have been used
65 for other purposes by other adtxenlvm machinery
66 4. process the command line arguments again, so they
67 can easily be made to override the user configuration file
68 5. calculate the values for variables which haven't been set
69 and whose default values depend on circumstances (including
72 ---------- Items which definitely need attention ----------
74 adt_guests_domain .<domain-of-host_hostname>
75 adt_guest_hostname <distro>.[<nominum>.]<domain>
76 adt_guest_ipaddr from looking hostname up in the DNS
77 Hostname and IP address for the testbed.
78 If the configuration specifies one of the address and hostname
79 but not the other, the missing information will be found with
80 a DNS lookup. If neither is specified, adt_guests_domain is
81 used; if it starts with `.' then <distro>.<nominum> is
82 prepended; otherwise just <distro>. is prepended. NOTE: some
83 effort by the local network administrator to allocate an IP
84 address (and ideally create DNS entries) is essential. It is
85 not possible to use DHCP for IP address allocation for the
88 ---------- Firewall policy items ----------
90 adt_fw_localmirrors <none>
91 List of IP addresses of local mirrors, to which the
92 testbed should allowed to make HTTP requests.
94 adt_fw_testbedclients <host_ipaddr>
95 List of IP addresses of hosts which will be allowed to make
96 connections into the testbed system.
98 adt_fw_prohibnets 192.168.0.0/24 172.16.0.0/12 10.0.0.0/8
99 List of network ranges with which the testbed will be
100 prohibited from communicating, notwithstanding
103 adt_fw_allowglobalports 80
104 List of ports to which the testbed will be allowed to make
105 outgoing connections.
107 adt_fw_hook <config> with _config replaced with _fwhook
108 or none of <config> doesn't end in _config
109 bash fragment to source during firewall setup
111 ---------- Items that are likely to need attention ----------
113 adt_kernel the booted kernel file /boot/xen*`uname -r`
114 Kernel to boot in the testbed image
116 adt_ramdisk <kernel>.initrd.img
117 Initial ramdisk to provide to the testbid image.
118 "none" means do not provide an initial ramdisk.
120 adt_modules /lib/modules/`uname -r`
121 Directory with modules to be copied into the testbed.
123 adt_lvm_vg the system's LVM volume group if there is only one
124 LVM volume group to create base filesystem image in.
126 adt_pbuilder_args <none>
127 Extra arguments to pass to pbuilder.
129 adt_lvm_erasebase yes
130 Whether the base filesystem image needs to be filled with
131 zeroes. If you are going to be using the image only locally
132 and so don't care whether the base image contains bits of
133 previous data from the disk, you may set this to `no'.
135 adt_debootstrap_includemore <empty>
136 adt_debootstrap_include libc6-xen,openssh-server,ed
137 Comma-separated lists of packages for --include option to
138 debootstrap. It is best to set includemore.
140 adt_debootstrap_components *
141 Components of the distribution to consider. (Eg, `main'.)
143 adt_debootstrap_mirrors <empty string>
144 adt_debootstrap_script <empty string>
145 Third and fourth arguments to debootstrap.
147 adt_setup_hook <config> with _config replaced with
148 _setuphook, as for adt_fw_hook
149 Program to run at last moment before we freeze the image.
150 Will be invoked with one argument: the directory containing
151 the root of the testbed. In the future more arguments may be
152 defined, so the hook script should not fail if more are
153 supplied. The supplied hook value will be split at
154 whitespace before execution as if
155 $adt_setup_hook /path/to/root
156 was run from within a shellscript.
158 ---------- Tuning parameters ----------
161 adt_fs_mkfs_args <none>
162 Filesystem type and any additional arguments to mkfs. If
163 _args contains whitespace, it results in multiple arguments;
164 it is not possible to pass whitespace-containing arguments to
167 adt_testbed_ram 256 [Mby]
168 Physical RAM allocated for each testbed instance while
169 creating and running.
171 adt_freeze_ram 32 [Mby]
172 Physical RAM size for frozen image; we reduce the testbed
173 to this before freezing it and grow it again when we resume
177 Size of base filesystem image. Should be big enough to
178 contain all of the software under test and all of its working
179 space, as no running testbed can ever use more than this
180 (despite copy-on-write).
183 Space to allocate for copy-on-write snapshot data. This is
184 the maximum amount of data that a running testbed can use.
185 This value should be less than the adt_fs_size.
187 adt_fs_cowchunk 8 [Mby]
188 Copy-on-write chunk size.
190 adt_vm_reduce_retries 10 [seconds]
191 Time to wait for VM to reduce its memory following
194 ---------- Configuration for advanced uses ----------
196 adt_config /etc/autopkgtest/xenlvm_<nominum>_conf
199 adt_ssh_privkey /root/.ssh/id_<ssh_keytype>_<nominum>
200 adt_ssh_pubkey <ssh_privkey>.pub
201 adt_ssh_keyident_args -i <ssh_privkey>
202 adt_ssh_keygen_args -t <ssh_keytype>
203 SSH keypair to use for authentication to the testbed.
204 If the pubkey file and privkey file do not exist and
205 correspond to each other, a new key will be generated.
206 The best combinations of these variables to set are:
207 keytype [& keygen_args] - just change the key type
208 privkey [& keygen_args] - generate/use a different keypair
209 pubkey, keyident_args - use an existing key via agent etc.,
210 privkey is ignored if pubkey and keyident_args
211 are set and pubkey file exists
214 Namespace prefix for Xen domains, LVM volumes, devmapper
215 devices, entries in /dev, files in /var, and so on. You may
216 run several instances of the adt virtualisation system with
217 different nominums and they won't interact. It is best for
218 this to be a legal DNS label (using alphanumerics and hyphens
219 only); normally it when it is used to construct an identifier
220 it will be separated by other parts by underscores `_', so
221 they should be avoided.
223 adt_guest_macaddr 00:16:3e:7c:aa:7f
224 adt_net_vifscript /etc/xen/scripts/vif-route-adt
226 ---------- Items which should not usually need to be changed ----------
228 adt_host_hostname `hostname -f`
229 adt_host_ipaddr from looking hostname up in the DNS
230 Hostname and IP address for the host, ie the Xen dom0 system.
231 If the configuration specifies one of the address and hostname
232 but not the other, the missing information will be found with
233 a DNS lookup. Note that if the host system uses a dynamically
234 allocated DHCP address, things will go wrong when the address
237 adt_playbase /var/lib/autopkgtest/xenlvm
238 Base of filesystem playground areas.
240 adt_play <playbase>/<nominum>_<distro>
241 Playground area for this particular testbed construction and
244 adt_xmconfig <play>/xmconfig
245 Xen virtual machine creation configuration for xm create.
246 This file will be (over)written during testbed setup.
248 adt_lvm_baselv <nominum>_<distro>_base
249 adt_lvm_cowdatalv <nominum>_<distro>_cowdata
250 LVM volume for base filesystem image, and copy-on-write
251 buffer. Will be created during testbed setup, destroying any
252 previous volume if necessary. This is the logical volume name
253 not including /dev/<lvm_vg>.
255 adt_devmapper_cowdev <nominum>_<distro>_snap
256 devmapper device for copy-on-write image used by testbed when
257 running. This is the device name in the devmapper namespace,
258 ie not including /dev/mapper.
260 adt_fslink_dir adt-xenlvm
261 adt_fslink_name <nominum>_<distro>_fs
262 Directory in /dev, and filename in that directory, where the
263 scripts put the symlink used to trick Xen into using a
264 different block device on resume than was used for creation.
266 adt_xmname <nominum>_<distro>
267 Xen virtual machine name, as passed to xm create.