[ovirt-users] Passing custom script to cloud init using api
Juan Hernandez
jhernand at redhat.com
Thu Sep 11 12:46:15 UTC 2014
On 09/11/2014 12:51 PM, Shanil S wrote:
> Hi Juan,
>
> Also, i tried the following custom script from the ovirt panel and its
> working
>
> #cloud-config
> write_files:
> -content: |
> # THIS IS MY TEXT FILE
> Some Content for my file
> path: /tmp/myfile
> permissions: '0644'
>
>
> but the same content script i tried from the ovir api call like
>
> <custom_script>#cloud-config
> write_files:
> -content: |
> # THIS IS MY TEXT FILE
> Some Content for my file
> path: /tmp/myfile
> permissions: '0644' </custom_script>
> </initialization>
>
> But its not working, may be this is a bug in the ovirt api function call ?
>
Currently the "custom_script" element doesn't work in combination with
"cloud-init". To make it work you will have to use the "files" element:
<action>
<vm>
<initialization>
<cloud_init>
...
<files>
<file>
<name>this is ignored</name>
<content><![CDATA[your script]]></content>
<type>plaintext</type>
</file>
</files>
</cloud_init>
</initialization>
</vm>
</action>
As I wrote before there is a bug related to this:
https://bugzilla.redhat.com/1138564
If that bug is fixed (unlikely according to the last comments) then the
"custom_script" element will start working, but for know I suggest you
include your custom script in both places:
<action>
<vm>
<initialization>
<cloud_init>
...
<files>
<file>
<name>this is ignored</name>
<content><![CDATA[your script]]></content>
<type>plaintext</type>
</file>
</files>
</cloud_init>
<custom_script><![CDATA[your script]]></custom_script>
</initialization>
</vm>
</action>
>
> --
> Regards
> Shanil
>
> On Thu, Sep 11, 2014 at 3:36 PM, Shanil S <xielesshanil at gmail.com
> <mailto:xielesshanil at gmail.com>> wrote:
>
> Hi Juan,
>
> Okay sure..
> The following xml i used
>
> <action>
> <vm>
> <os>
> <boot dev='cdrom'/>
> </os>
> <initialization>
> <cloud_init>
> <host>
> <address>test2</address>
> </host>
>
> <users>
> <user>
> <user_name>root</user_name>
> <password>test</password>
> </user>
> </users>
> <network_configuration>
> <nics>
>
> <nic>
> <interface>virtio</interface>
> <name>eth0</name>
> <boot_protocol>none</boot_protocol>
> <on_boot>true</on_boot>
> </nic>
> </nics>
> <dns>
> <servers>
> <host>
> <address>x.x.x.x</address>
> </host>
> </servers>
> </dns>
> </network_configuration>
> </cloud_init>
> <custom_script> #cloud-config
>
> phone_home:
> url: http://x.x.com/api/xx/api_receive.php
>
> </custom_script>
> </initialization>
> </vm>
> </action>
>
>
>
> --
> Regards
> Shanil
>
> On Thu, Sep 11, 2014 at 1:48 PM, Juan Hernandez <jhernand at redhat.com
> <mailto:jhernand at redhat.com>> wrote:
>
> On 09/11/2014 06:54 AM, Shanil S wrote:
> > Hi Juan,
> >
> > It seems the it doesn't contains the "phone_home " section in
> the cat
> > /mnt/openstack/latest/user_data
> >
> > the following is the output
> >
> > #cloud-config
> > ssh_pwauth: true
> > disable_root: 0
> > output:
> > all: '>> /var/log/cloud-init-output.log'
> > user: root
> > password: admin123
> > chpasswd:
> > expire: false
> > runcmd:
> > - 'sed -i ''/^datasource_list: /d'' /etc/cloud/cloud.cfg; echo
> > ''datasource_list:
> > ["NoCloud", "ConfigDrive"]'' >> /etc/cloud/cloud.cfg'
> >
> >
> > but if i try with the
> >
> > <files>
> > <file>
> > <name>ignored</name>
> > <content><![CDATA[runcmd:
> > - echo 'Test script !' > /iwashere_test.txt
> > ]]></content>
> > <type>plaintext</type>
> > </file>
> > </files>
> >
> > then it will create the /iwashere_test.txt and write the
> contents and in
> > that time the cat /mnt/openstack/latest/user_data is
> >
> > cat /mnt/openstack/latest/user_data
> > #cloud-config
> > ssh_pwauth: true
> > disable_root: 0
> > output:
> > all: '>> /var/log/cloud-init-output.log'
> > user: root
> > password: admin123
> > chpasswd:
> > expire: false
> > runcmd:
> > - 'sed -i ''/^datasource_list: /d'' /etc/cloud/cloud.cfg; echo
> > ''datasource_list:
> > ["NoCloud", "ConfigDrive"]'' >> /etc/cloud/cloud.cfg'
> > runcmd:
> > - echo 'Test script !' > /iwashere_test.txt
> >
> > so, i think the custom script section is not working, i am
> attaching the
> > vm log as a screenshot.
> >
>
> Can you share the XML document that you sent to the RESTAPI in
> order to
> populate the "phone_home" section?
>
> > On Wed, Sep 10, 2014 at 2:07 PM, Juan Hernandez <jhernand at redhat.com <mailto:jhernand at redhat.com>
> > <mailto:jhernand at redhat.com <mailto:jhernand at redhat.com>>> wrote:
> >
> > On 09/10/2014 06:44 AM, Shanil S wrote:
> > > Hi Juan,
> > >
> > > What i am planning to do is to make work the following
> script
> > >
> > > #cloud-config
> > >
> > > # phone_home: if this dictionary is present, then the
> phone_home
> > > # cloud-config module will post specified data back to
> the given
> > > # url
> > > # default: none
> > > # phone_home:
> > > # url: http://my.foo.bar/$INSTANCE/
> > > # post: all
> > > # tries: 10
> > > #
> > > phone_home:
> > > url: http://my.example.com/$INSTANCE_ID/
> > > post: [ pub_key_dsa, pub_key_rsa, pub_key_ecdsa,
> instance_id ]
> > >
> > >
> (http://cloudinit.readthedocs.org/en/latest/topics/examples.html#run-commands-on-first-boot)
> > >
> > > but it wasn't working when i tried, i hope to post the
> above values to
> > > the specific url and get the posted details.
> > >
> >
> > I think it should work, but it depends completely on
> cloud-init itself.
> > I'd suggest you check the content of the generated cloud-init
> > configuration file (as described in a previous mail). If
> it contains the
> > "phone_home" section then you can discard a problem with
> oVirt, and
> > focus on clud-init.
> >
> > >
> > > On Wed, Sep 10, 2014 at 10:02 AM, Shanil S
> <xielesshanil at gmail.com <mailto:xielesshanil at gmail.com>
> <mailto:xielesshanil at gmail.com <mailto:xielesshanil at gmail.com>>
> > > <mailto:xielesshanil at gmail.com <mailto:xielesshanil at gmail.com>
> <mailto:xielesshanil at gmail.com
> <mailto:xielesshanil at gmail.com>>>> wrote:
> > >
> > > Hi Juan,
> > >
> > > Okay.. Thanks.. its working.
> > >
> > > I would like to execute other page something like test_script.php by
> > > posting some values to it using the cloud init, Is it possible to do
> > > it ?
> > >
> > >
> > >
> > > --
> > > Regards
> > > Shanil
> > >
> > > On Fri, Sep 5, 2014 at 10:08 PM, Juan Hernandez <jhernand at redhat.com <mailto:jhernand at redhat.com>
> <mailto:jhernand at redhat.com <mailto:jhernand at redhat.com>>
> > > <mailto:jhernand at redhat.com
> <mailto:jhernand at redhat.com> <mailto:jhernand at redhat.com
> <mailto:jhernand at redhat.com>>>> wrote:
> > >
> > > On 09/05/2014 12:55 PM, Shanil S wrote:
> > > > Hi Juan,
> > > >
> > > > Thanks for your reply.
> > > >
> > > > I tried with the above but i was unable to
> find the
> > 'iwashere.txt' after
> > > > executing the above xml.
> > > >
> > >
> > > I repeated the test, this time with 3.4, and it
> worked
> > fine for
> > > me. As
> > > the formatting of the XML is very important I'd
> suggest
> > that you
> > > take
> > > the attached script (instead of copy & paste
> from the mail),
> > > change the
> > > password and VM id and run it.
> > >
> > > There are two kind of things that can go wrong
> here. One
> > is that the
> > > engine/VDSM combination may not be generating
> the right
> > file. To
> > > verify
> > > this start the VM with the attached script, and
> once it is
> > > started go to
> > > the hypervisor where it is running and find the
> corresponding
> > > qemu process:
> > >
> > > # ps -ef | grep -- '-name myvm'
> > >
> > > This will give you a very long command line.
> That command line
> > > should
> > > include a "-drive" option containing the full
> path of the
> > disk image
> > > generated by the engine/VDSM, something like this:
> > >
> > > -drive
> > >
> >
> file=/var/run/vdsm/payload/b5f087d4-022d-4d5f-8a1e-268c562c7bb1.b6fcddff571bb8c2028c61b623d172a6.img
> > >
> > > To inspect its content make a copy (just in
> case) and
> > mount it:
> > >
> > > # cp -drive
> > >
> >
> file=/var/run/vdsm/payload/b5f087d4-022d-4d5f-8a1e-268c562c7bb1.b6fcddff571bb8c2028c61b623d172a6.img
> > > /root/my.img
> > > # mount -o loop,ro /root/my.img /mnt
> > >
> > > Inspect the content:
> > >
> > > # find /mnt
> > > /mnt/openstack
> > > /mnt/openstack/content
> > > /mnt/openstack/content/0000
> > > /mnt/openstack/latest
> > > /mnt/openstack/latest/meta_data.json
> > > /mnt/openstack/latest/user_data
> > >
> > > The content of the custom-script should be at
> the end of the
> > > "user_data"
> > > file, so take a look at that:
> > >
> > > # cat /mnt/openstack/latest/user_data
> > > #cloud-config
> > > ssh_pwauth: true
> > > disable_root: 0
> > > output:
> > > all: '>> /var/log/cloud-init-output.log'
> > > user: root
> > > password: mypassword
> > > chpasswd:
> > > expire: false
> > > runcmd:
> > > - 'sed -i ''/^datasource_list: /d''
> > /etc/cloud/cloud.cfg; echo
> > > ''datasource_list:
> > > ["NoCloud", "ConfigDrive"]'' >>
> /etc/cloud/cloud.cfg'
> > > runcmd:
> > > - echo "I was here!" > /iwashere.txt
> > >
> > > If your custom script isn't there then there is some
> > problem in the
> > > engine/VDSM side, otherwise the problem is
> probably in
> > cloud-init
> > > itself, and we will need someone with more
> knowledge of
> > > cloud-init to
> > > debug it.
> > >
> > > Don't forget to umount the file when finished:
> > >
> > > # umount /mnt
> > >
> > > >
> > > > On Fri, Sep 5, 2014 at 3:00 PM, Juan Hernandez
> > <jhernand at redhat.com <mailto:jhernand at redhat.com>
> <mailto:jhernand at redhat.com <mailto:jhernand at redhat.com>>
> > <mailto:jhernand at redhat.com <mailto:jhernand at redhat.com>
> <mailto:jhernand at redhat.com <mailto:jhernand at redhat.com>>>
> > > > <mailto:jhernand at redhat.com
> <mailto:jhernand at redhat.com> <mailto:jhernand at redhat.com
> <mailto:jhernand at redhat.com>>
> > <mailto:jhernand at redhat.com <mailto:jhernand at redhat.com>
> <mailto:jhernand at redhat.com <mailto:jhernand at redhat.com>>>>> wrote:
> > > >
> > > > On 09/05/2014 10:46 AM, Sven Kieske wrote:
> > > > >
> > > > >
> > > > > Am 05.09.2014 10:27, schrieb Juan Hernandez:
> > > > >> Trying to make an example for this I
> discovered that
> > > the "custom_script"
> > > > >> element is currently ignored if the
> "cloud_init"
> > > element is present.
> > > > >> Instead we are taking the content of
> the first "file"
> > > element from the
> > > > >> "cloud_init" element and appending it
> to the
> > cloud-init
> > > configuration
> > > > >> file. I believe that this is a bug, as
> it breaks
> > > backwards compatibility:
> > > > >>
> > > > >> https://bugzilla.redhat.com/1138564
> > > > >
> > > > > Thanks for the report, I just proposed
> this as a
> > blocker
> > > for the 3.4.4
> > > > > release as it is a clear regression.
> > > > > Also I rely on this functionality in my
> 3.3. setup
> > and I
> > > want to upgrade
> > > > > to 3.4 so I can't upgrade until this is
> fixed and
> > released.
> > > >
> > > > Agree, I set the bug as a blocker for 3.4.4.
> > > >
> > > > >>
> > > > >> However, you can exploit this bug to do
> what you
> > want.
> > > This is an example:
> > > > >
> > > > > Well I guess this is a pretty bad idea,
> because it
> > will
> > > just work
> > > > > until the bug is fixed?
> > > > >
> > > >
> > > > No, what I proposed in the example is to
> put the custom
> > > script in both
> > > > the first "file" inside "clud_init" and in the
> > > "custom_script" element.
> > > > That should work with the current status
> and also
> > if/when
> > > we fix the
> > > > bug.
> > > >
> > >
> >
>
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