Mark the iSCSI deploy as deprecated in the docs
Also move it to the bottom of the user guide and fix some ancient bits (more fixing required). Change-Id: I118d3385110c85cb6e5f1beacb7c5d1887bda616
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Dmitry Tantsur
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382a43627e
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@ -6,25 +6,6 @@ A *deploy* interface plays a critical role in the provisioning process. It
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orchestrates the whole deployment and defines how the image gets transferred
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to the target disk.
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.. _iscsi-deploy:
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iSCSI deploy
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============
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With ``iscsi`` deploy interface, the deploy ramdisk publishes the node's hard
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drive as an iSCSI_ share. The ironic-conductor then copies the image to this
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share. See :ref:`iSCSI deploy diagram <iscsi-deploy-example>` for a detailed
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explanation of how this deploy interface works.
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This interface is used by default, if enabled (see
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:ref:`enable-hardware-interfaces`). You can specify it explicitly
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when creating or updating a node::
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baremetal node create --driver ipmi --deploy-interface iscsi
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baremetal node set <NODE> --deploy-interface iscsi
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.. _iSCSI: https://en.wikipedia.org/wiki/ISCSI
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.. _direct-deploy:
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Direct deploy
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@ -147,3 +128,26 @@ Ramdisk deploy
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The ramdisk interface is intended to provide a mechanism to "deploy" an
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instance where the item to be deployed is in reality a ramdisk. It is
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documented separately, see :doc:`/admin/ramdisk-boot`.
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.. _iscsi-deploy:
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iSCSI deploy
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============
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.. warning::
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This deploy interface is deprecated and will be removed in the Xena release
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cycle. Please use `direct deploy`_ instead.
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With ``iscsi`` deploy interface, the deploy ramdisk publishes the node's hard
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drive as an iSCSI_ share. The ironic-conductor then copies the image to this
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share. See :ref:`iSCSI deploy diagram <iscsi-deploy-example>` for a detailed
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explanation of how this deploy interface works.
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This interface is used by default, if enabled (see
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:ref:`enable-hardware-interfaces`). You can specify it explicitly
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when creating or updating a node::
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baremetal node create --driver ipmi --deploy-interface iscsi
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baremetal node set <NODE> --deploy-interface iscsi
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.. _iSCSI: https://en.wikipedia.org/wiki/ISCSI
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@ -119,15 +119,15 @@ These pre-requisites must be met before the deployment process:
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- user-image-vmlinuz
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- user-image-initrd
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* Hardware to be enrolled via Ironic RESTful API service.
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* Hardware to be enrolled via the bare metal API service.
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Deploy Process
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--------------
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This describes a typical ironic node deployment using PXE and the Ironic
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Python Agent (IPA). Depending on the ironic driver interfaces used, some of the
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steps might be marginally different, however the majority of them will remain
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the same.
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This describes a typical bare metal node deployment within OpenStack using PXE
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to boot the ramdisk. Depending on the ironic driver interfaces used, some of
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the steps might be marginally different, however the majority of them will
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remain the same.
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#. A boot instance request comes in via the Nova API, through the message
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queue to the Nova scheduler.
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@ -178,19 +178,18 @@ the same.
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#. The ironic node's management interface issues commands to enable network
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boot of a node.
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#. The ironic node's deploy interface caches the instance image (in case of
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``iscsi`` deploy interface), and kernel and ramdisk if needed (it is
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needed in case of netboot for example).
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#. The ironic node's deploy interface caches the instance image, kernel and
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ramdisk if needed (it is needed in case of netboot for example).
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#. The ironic node's power interface instructs the node to power on.
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#. The node boots the deploy ramdisk.
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#. Depending on the exact driver used, either the conductor copies the image
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over iSCSI to the physical node (:ref:`iscsi-deploy`) or the deploy ramdisk
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downloads the image from a temporary URL (:ref:`direct-deploy`).
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The temporary URL can be generated by Swift API-compatible object stores,
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for example Swift itself or RadosGW.
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#. Depending on the exact driver used, the deploy ramdisk downloads the image
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from a URL (:ref:`direct-deploy`) or the conductor uses SSH to execute
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commands (:ref:`ansible-deploy`). The URL can be generated by Swift
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API-compatible object stores, for example Swift itself or RadosGW, or
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provided by a user.
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The image deployment is done.
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@ -259,67 +258,9 @@ The following two examples describe what ironic is doing in more detail,
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leaving out the actions performed by nova and some of the more advanced
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options.
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.. _iscsi-deploy-example:
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Example 1: PXE Boot and iSCSI Deploy Process
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--------------------------------------------
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This process is how :ref:`iscsi-deploy` works.
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.. seqdiag::
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:scale: 75
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diagram {
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Nova; API; Conductor; Neutron; HTTPStore; "TFTP/HTTPd"; Node;
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activation = none;
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span_height = 1;
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edge_length = 250;
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default_note_color = white;
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default_fontsize = 14;
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Nova -> API [label = "Set instance_info\n(image_source,\nroot_gb, etc.)"];
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Nova -> API [label = "Validate power and deploy\ninterfaces"];
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Nova -> API [label = "Plug VIFs to the node"];
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Nova -> API [label = "Set provision_state,\noptionally pass configdrive"];
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API -> Conductor [label = "do_node_deploy()"];
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Conductor -> Conductor [label = "Validate power and deploy interfaces"];
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Conductor -> HTTPStore [label = "Store configdrive if configdrive_use_swift \noption is set"];
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Conductor -> Node [label = "POWER OFF"];
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Conductor -> Neutron [label = "Attach provisioning network to port(s)"];
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Conductor -> Neutron [label = "Update DHCP boot options"];
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Conductor -> Conductor [label = "Prepare PXE\nenvironment for\ndeployment"];
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Conductor -> Node [label = "Set PXE boot device \nthrough the BMC"];
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Conductor -> Conductor [label = "Cache deploy\nkernel, ramdisk,\ninstance images"];
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Conductor -> Node [label = "REBOOT"];
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Node -> Neutron [label = "DHCP request"];
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Neutron -> Node [label = "next-server = Conductor"];
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Node -> Node [label = "Runs agent\nramdisk"];
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Node -> API [label = "lookup()"];
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API -> Node [label = "Pass UUID"];
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Node -> API [label = "Heartbeat (UUID)"];
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API -> Conductor [label = "Heartbeat"];
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Conductor -> Node [label = "Send IPA a command to expose disks via iSCSI"];
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Conductor -> Node [label = "iSCSI attach"];
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Conductor -> Node [label = "Copies user image and configdrive, if present"];
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Conductor -> Node [label = "iSCSI detach"];
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Conductor -> Conductor [label = "Delete instance\nimage from cache"];
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Conductor -> Node [label = "Install boot loader, if requested"];
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Conductor -> Neutron [label = "Update DHCP boot options"];
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Conductor -> Conductor [label = "Prepare PXE\nenvironment for\ninstance image"];
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Conductor -> Node [label = "Set boot device either to PXE or to disk"];
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Conductor -> Node [label = "Collect ramdisk logs"];
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Conductor -> Node [label = "POWER OFF"];
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Conductor -> Neutron [label = "Detach provisioning network\nfrom port(s)"];
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Conductor -> Neutron [label = "Bind tenant port"];
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Conductor -> Node [label = "POWER ON"];
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Conductor -> Conductor [label = "Mark node as\nACTIVE"];
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}
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(From a `talk`_ and `slides`_)
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.. _direct-deploy-example:
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Example 2: PXE Boot and Direct Deploy Process
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Example 1: PXE Boot and Direct Deploy Process
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---------------------------------------------
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This process is how :ref:`direct-deploy` works.
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@ -377,5 +318,63 @@ This process is how :ref:`direct-deploy` works.
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(From a `talk`_ and `slides`_)
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.. _iscsi-deploy-example:
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Example 2: PXE Boot and iSCSI Deploy Process
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--------------------------------------------
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This process is how the currently deprecated :ref:`iscsi-deploy` works.
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.. seqdiag::
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:scale: 75
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diagram {
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Nova; API; Conductor; Neutron; HTTPStore; "TFTP/HTTPd"; Node;
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activation = none;
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span_height = 1;
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edge_length = 250;
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default_note_color = white;
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default_fontsize = 14;
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Nova -> API [label = "Set instance_info\n(image_source,\nroot_gb, etc.)"];
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Nova -> API [label = "Validate power and deploy\ninterfaces"];
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Nova -> API [label = "Plug VIFs to the node"];
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Nova -> API [label = "Set provision_state,\noptionally pass configdrive"];
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API -> Conductor [label = "do_node_deploy()"];
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Conductor -> Conductor [label = "Validate power and deploy interfaces"];
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Conductor -> HTTPStore [label = "Store configdrive if configdrive_use_swift \noption is set"];
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Conductor -> Node [label = "POWER OFF"];
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Conductor -> Neutron [label = "Attach provisioning network to port(s)"];
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Conductor -> Neutron [label = "Update DHCP boot options"];
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Conductor -> Conductor [label = "Prepare PXE\nenvironment for\ndeployment"];
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Conductor -> Node [label = "Set PXE boot device \nthrough the BMC"];
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Conductor -> Conductor [label = "Cache deploy\nkernel, ramdisk,\ninstance images"];
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Conductor -> Node [label = "REBOOT"];
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Node -> Neutron [label = "DHCP request"];
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Neutron -> Node [label = "next-server = Conductor"];
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Node -> Node [label = "Runs agent\nramdisk"];
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Node -> API [label = "lookup()"];
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API -> Node [label = "Pass UUID"];
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Node -> API [label = "Heartbeat (UUID)"];
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API -> Conductor [label = "Heartbeat"];
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Conductor -> Node [label = "Send IPA a command to expose disks via iSCSI"];
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Conductor -> Node [label = "iSCSI attach"];
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Conductor -> Node [label = "Copies user image and configdrive, if present"];
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Conductor -> Node [label = "iSCSI detach"];
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Conductor -> Conductor [label = "Delete instance\nimage from cache"];
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Conductor -> Node [label = "Install boot loader, if requested"];
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Conductor -> Neutron [label = "Update DHCP boot options"];
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Conductor -> Conductor [label = "Prepare PXE\nenvironment for\ninstance image"];
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Conductor -> Node [label = "Set boot device either to PXE or to disk"];
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Conductor -> Node [label = "Collect ramdisk logs"];
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Conductor -> Node [label = "POWER OFF"];
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Conductor -> Neutron [label = "Detach provisioning network\nfrom port(s)"];
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Conductor -> Neutron [label = "Bind tenant port"];
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Conductor -> Node [label = "POWER ON"];
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Conductor -> Conductor [label = "Mark node as\nACTIVE"];
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}
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(From a `talk`_ and `slides`_)
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.. _talk: https://www.openstack.org/summit/vancouver-2015/summit-videos/presentation/isn-and-039t-it-ironic-the-bare-metal-cloud
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.. _slides: http://www.slideshare.net/devananda1/isnt-it-ironic-managing-a-bare-metal-cloud-osl-tes-2015
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