[ovirt-users] Passing custom script to cloud init using api
Juan Hernandez
jhernand at redhat.com
Thu Sep 11 04:18:11 EDT 2014
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>> 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>>> 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>>> 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>>>> 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.
> > >
> >
>
--
Dirección Comercial: C/Jose Bardasano Baos, 9, Edif. Gorbea 3, planta
3ºD, 28016 Madrid, Spain
Inscrita en el Reg. Mercantil de Madrid – C.I.F. B82657941 - Red Hat S.L.
More information about the Users
mailing list