Question about cloud-init
Hello, I have a question about cloud-init: After installing vm, I installed cloud-init immediately, and enabled its four services, and then I can use cloud-init in the admin interface. However, I don't know how cloud-init knows where to get the relevant information (such as host name, SSH secret key, etc.) that I configured on the admin interface ? For I haven't configured the data source for cloud-init. Why it can works ? Thanks!
On Sat, Jul 31, 2021 at 7:09 AM tommy <sz_cuitao@163.com> wrote:
Hello, I have a question about cloud-init:
After installing vm, I installed cloud-init immediately, and enabled its four services, and then I can use cloud-init in the admin interface.
However, I don't know how cloud-init knows where to get the relevant information (such as host name, SSH secret key, etc.) that I configured on the admin interface ? For I haven't configured the data source for cloud-init.
Hi, The relevant information comes as a payload to the VM, a CD-ROM containing the data source.
Why it can works ?
Cloud-init detects the data source and configures the OS. Please note that once the VM booted, the only way to provide the cloud-init payload is by using Run-Once. For a VM that didn't boot, a regular run will work as well. Regards, Liran
Thanks!
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Please note that once the VM booted, the only way to provide the cloud-init payload is by using Run-Once. For a VM that didn't boot, a regular run will work as well. Do you mean that you can use cloud-init for the first normal startup of a virtual machine that has not yet been booted, and then you can't use cloud-init for subsequent normal startup? Is it possible to use cloud-init with the run-once boot option as long as the virtual machine has already been started? -----Original Message----- From: users-bounces@ovirt.org <users-bounces@ovirt.org> On Behalf Of Liran Rotenberg Sent: Sunday, August 1, 2021 3:01 PM To: tommy <sz_cuitao@163.com> Cc: users@ovirt.org Subject: [ovirt-users] Re: Question about cloud-init On Sat, Jul 31, 2021 at 7:09 AM tommy <sz_cuitao@163.com> wrote:
Hello, I have a question about cloud-init:
After installing vm, I installed cloud-init immediately, and enabled its four services, and then I can use cloud-init in the admin interface.
However, I don't know how cloud-init knows where to get the relevant information (such as host name, SSH secret key, etc.) that I configured on the admin interface ? For I haven't configured the data source for cloud-init.
Hi, The relevant information comes as a payload to the VM, a CD-ROM containing the data source.
Why it can works ?
Cloud-init detects the data source and configures the OS. Please note that once the VM booted, the only way to provide the cloud-init payload is by using Run-Once. For a VM that didn't boot, a regular run will work as well. Regards, Liran
Thanks!
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On Mon, Aug 2, 2021 at 10:22 AM Tommy Sway <sz_cuitao@163.com> wrote:
Please note that once the VM booted, the only way to provide the cloud-init payload is by using Run-Once. For a VM that didn't boot, a regular run will work as well.
Do you mean that you can use cloud-init for the first normal startup of a virtual machine that has not yet been booted, and then you can't use cloud-init for subsequent normal startup?
Yes. This is for safety from overriding a configuration on future boots.
Is it possible to use cloud-init with the run-once boot option as long as the virtual machine has already been started? Yes, if you set it in run-once the payload will be included to the VM on boot, regardless if it booted already or not.
-----Original Message----- From: users-bounces@ovirt.org <users-bounces@ovirt.org> On Behalf Of Liran Rotenberg Sent: Sunday, August 1, 2021 3:01 PM To: tommy <sz_cuitao@163.com> Cc: users@ovirt.org Subject: [ovirt-users] Re: Question about cloud-init
On Sat, Jul 31, 2021 at 7:09 AM tommy <sz_cuitao@163.com> wrote:
Hello, I have a question about cloud-init:
After installing vm, I installed cloud-init immediately, and enabled its four services, and then I can use cloud-init in the admin interface.
However, I don't know how cloud-init knows where to get the relevant information (such as host name, SSH secret key, etc.) that I configured on the admin interface ? For I haven't configured the data source for cloud-init.
Hi, The relevant information comes as a payload to the VM, a CD-ROM containing the data source.
Why it can works ?
Cloud-init detects the data source and configures the OS. Please note that once the VM booted, the only way to provide the cloud-init payload is by using Run-Once. For a VM that didn't boot, a regular run will work as well.
Regards, Liran
Thanks!
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Wouldn't the cloud-init information I configured in the initial run properties page of the virtual machine be unnecessary? -----Original Message----- From: Liran Rotenberg <lrotenbe@redhat.com> Sent: Monday, August 2, 2021 4:33 PM To: Tommy Sway <sz_cuitao@163.com> Cc: users@ovirt.org Subject: Re: [ovirt-users] Re: Question about cloud-init On Mon, Aug 2, 2021 at 10:22 AM Tommy Sway <sz_cuitao@163.com> wrote:
Please note that once the VM booted, the only way to provide the cloud-init payload is by using Run-Once. For a VM that didn't boot, a regular run will work as well.
Do you mean that you can use cloud-init for the first normal startup of a virtual machine that has not yet been booted, and then you can't use cloud-init for subsequent normal startup?
Yes. This is for safety from overriding a configuration on future boots.
Is it possible to use cloud-init with the run-once boot option as long as the virtual machine has already been started? Yes, if you set it in run-once the payload will be included to the VM on boot, regardless if it booted already or not.
-----Original Message----- From: users-bounces@ovirt.org <users-bounces@ovirt.org> On Behalf Of Liran Rotenberg Sent: Sunday, August 1, 2021 3:01 PM To: tommy <sz_cuitao@163.com> Cc: users@ovirt.org Subject: [ovirt-users] Re: Question about cloud-init
On Sat, Jul 31, 2021 at 7:09 AM tommy <sz_cuitao@163.com> wrote:
Hello, I have a question about cloud-init:
After installing vm, I installed cloud-init immediately, and enabled its four services, and then I can use cloud-init in the admin interface.
However, I don't know how cloud-init knows where to get the relevant information (such as host name, SSH secret key, etc.) that I configured on the admin interface ? For I haven't configured the data source for cloud-init.
Hi, The relevant information comes as a payload to the VM, a CD-ROM containing the data source.
Why it can works ?
Cloud-init detects the data source and configures the OS. Please note that once the VM booted, the only way to provide the cloud-init payload is by using Run-Once. For a VM that didn't boot, a regular run will work as well.
Regards, Liran
Thanks!
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On Mon, Aug 2, 2021 at 11:54 AM Tommy Sway <sz_cuitao@163.com> wrote:
Wouldn't the cloud-init information I configured in the initial run properties page of the virtual machine be unnecessary?
In that case - correct. Only the configuration you set in the run-once will be taken into account when you run it.
-----Original Message----- From: Liran Rotenberg <lrotenbe@redhat.com> Sent: Monday, August 2, 2021 4:33 PM To: Tommy Sway <sz_cuitao@163.com> Cc: users@ovirt.org Subject: Re: [ovirt-users] Re: Question about cloud-init
On Mon, Aug 2, 2021 at 10:22 AM Tommy Sway <sz_cuitao@163.com> wrote:
Please note that once the VM booted, the only way to provide the cloud-init payload is by using Run-Once. For a VM that didn't boot, a regular run will work as well.
Do you mean that you can use cloud-init for the first normal startup of a virtual machine that has not yet been booted, and then you can't use cloud-init for subsequent normal startup?
Yes. This is for safety from overriding a configuration on future boots.
Is it possible to use cloud-init with the run-once boot option as long as the virtual machine has already been started? Yes, if you set it in run-once the payload will be included to the VM on boot, regardless if it booted already or not.
-----Original Message----- From: users-bounces@ovirt.org <users-bounces@ovirt.org> On Behalf Of Liran Rotenberg Sent: Sunday, August 1, 2021 3:01 PM To: tommy <sz_cuitao@163.com> Cc: users@ovirt.org Subject: [ovirt-users] Re: Question about cloud-init
On Sat, Jul 31, 2021 at 7:09 AM tommy <sz_cuitao@163.com> wrote:
Hello, I have a question about cloud-init:
After installing vm, I installed cloud-init immediately, and enabled its four services, and then I can use cloud-init in the admin interface.
However, I don't know how cloud-init knows where to get the relevant information (such as host name, SSH secret key, etc.) that I configured on the admin interface ? For I haven't configured the data source for cloud-init.
Hi, The relevant information comes as a payload to the VM, a CD-ROM containing the data source.
Why it can works ?
Cloud-init detects the data source and configures the OS. Please note that once the VM booted, the only way to provide the cloud-init payload is by using Run-Once. For a VM that didn't boot, a regular run will work as well.
Regards, Liran
Thanks!
_______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/O5NKQO 56 42X3WYES3QQBSSDZUQN6N5XX/
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participants (3)
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Liran Rotenberg -
tommy -
Tommy Sway