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| -rw-r--r-- | docs/gapanalysis/gap-analysis-openstack-kilo.rst | 255 |
1 files changed, 153 insertions, 102 deletions
diff --git a/docs/gapanalysis/gap-analysis-openstack-kilo.rst b/docs/gapanalysis/gap-analysis-openstack-kilo.rst index efb0aab..dea09ba 100644 --- a/docs/gapanalysis/gap-analysis-openstack-kilo.rst +++ b/docs/gapanalysis/gap-analysis-openstack-kilo.rst @@ -10,105 +10,156 @@ requirements of VIM-agnostic IPv6 functionality, including infrastructure layer .. table:: :class: longtable -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Use Case / Requirement |Supported in Kilo Neutron|Notes | -+===========================================================+=========================+====================================================================+ -|All topologies work in a multi-tenant environment |Yes |The IPv6 design is following the Neutron tenant networks model; | -| | |dnsmasq is being used inside DHCP network namespaces, while radvd | -| | |is being used inside Neutron routers namespaces to provide full | -| | |isolation between tenants. Tenant isolation can be based on VLANs, | -| | |GRE, or VXLAN encapsulation. In case of overlays, the transport | -| | |network (and VTEPs) must be IPv4 based as of today. | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|IPv6 VM to VM only |Yes |It is possible to assign IPv6-only addresses to VMs. Both switching | -| | |(within VMs on the same tenant network) as well as east/west routing| -| | |(between different networks of the same tenant) are supported. | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|IPv6 external L2 VLAN directly attached to a VM |Yes |IPv6 provider network model; RA messages from upstream (external) | -| | |router are forwarded into the VMs | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|IPv6 subnet routed via L3 agent to an external IPv6 network| |Configuration is enhanced in Kilo to allow easier setup of the | -| |1. Yes |upstream gateway, without the user forced to create an IPv6 subnet | -|1. Both VLAN and overlay (e.g. GRE, VXLAN) subnet attached | |for the external network. | -| to VMs; | | | -|2. Must be able to support multiple L3 agents for a given |2. Yes | | -| external network to support scaling (neutron scheduler | | | -| to assign vRouters to the L3 agents) | | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Ability for a NIC to support both IPv4 and IPv6 (dual | |Dual-stack is supported in Neutron with the addition of | -|stack) address. | |``Multiple IPv6 Prefixes`` Blueprint | -| | | | -|1. VM with a single interface associated with a network, |1. Yes | | -| which is then associated with two subnets. | | | -|2. VM with two different interfaces associated with two |2. Yes | | -| different networks and two different subnets. | | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Support IPv6 Address assignment modes. |1. Yes | | -| | | | -|1. SLAAC |2. Yes | | -|2. DHCPv6 Stateless | | | -|3. DHCPv6 Stateful |3. Yes | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Ability to create a port on an IPv6 DHCPv6 Stateful subnet |Yes | | -|and assign a specific IPv6 address to the port and have it | | | -|taken out of the DHCP address pool. | | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Ability to create a port with fixed_ip for a |**No** |The following patch disables this operation: | -|SLAAC/DHCPv6-Stateless Subnet. | |https://review.openstack.org/#/c/129144/ | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Support for private IPv6 to external IPv6 floating IP; |**Rejected** |Blueprint proposed in upstream and got rejected. General expectation| -|Ability to specify floating IPs via Neutron API (REST and | |is to avoid NAT with IPv6 by assigning GUA to tenant VMs. See | -|CLI) as well as via Horizon, including combination of | |https://review.openstack.org/#/c/139731/ for discussion. | -|IPv6/IPv4 and IPv4/IPv6 floating IPs if implemented. | | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Provide IPv6/IPv4 feature parity in support for |**To-Do** |The L3 configuration should be transparent for the SR-IOV | -|pass-through capabilities (e.g., SR-IOV). | |implementation. SR-IOV networking support introduced in Juno based | -| | |on the ``sriovnicswitch`` ML2 driver is expected to work with IPv4 | -| | |and IPv6 enabled VMs. We need to verify if it works or not | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Additional IPv6 extensions, for example: IPSEC, IPv6 |**No** |It does not appear to be considered yet (lack of clear requirements)| -|Anycast, Multicast | | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|VM access to the meta-data server to obtain user data, SSH |**No** |This is currently not supported. Config-drive or dual-stack IPv4 / | -|keys, etc. using cloud-init with IPv6 only interfaces. | |IPv6 can be used as a workaround (so that the IPv4 network is used | -| | |to obtain connectivity with the metadata service) | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Full support for IPv6 matching (i.e., IPv6, ICMPv6, TCP, |Yes | | -|UDP) in security groups. Ability to control and manage all | | | -|IPv6 security group capabilities via Neutron/Nova API (REST| | | -|and CLI) as well as via Horizon. | | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|During network/subnet/router create, there should be an |Yes |Two new Subnet attributes were introduced to control IPv6 address | -|option to allow user to specify the type of address | |assignment options: | -|management they would like. This includes all options | | | -|including those low priority if implemented (e.g., toggle | |* ``ipv6-ra-mode``: to determine who sends Router Advertisements; | -|on/off router and address prefix advertisements); It must | | | -|be supported via Neutron API (REST and CLI) as well as via | |* ``ipv6-address-mode``: to determine how VM obtains IPv6 address, | -|Horizon | | default gateway, and/or optional information. | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Security groups anti-spoofing: Prevent VM from using a |Yes | | -|source IPv6/MAC address which is not assigned to the VM | | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Protect tenant and provider network from rough RAs |Yes |When using a tenant network, Neutron is going to automatically | -| | |handle the filter rules to allow connectivity of RAs to the VMs only| -| | |from the Neutron router port; with provider networks, users are | -| | |required to specify the LLA of the upstream router during the subnet| -| | |creation, or otherwise manually edit the security-groups rules to | -| | |allow incoming traffic from this specific address. | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Support the ability to assign multiple IPv6 addresses to |Yes | | -|an interface; both for Neutron router interfaces and VM | | | -|interfaces. | | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Ability for a VM to support a mix of multiple IPv4 and IPv6|Yes | | -|networks, including multiples of the same type. | | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Support for IPv6 Prefix Delegation. |**Roadmap** |Some partial support is available in Liberty release | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|Distributed Virtual Routing (DVR) support for IPv6 |**No** |Blueprint proposed upstream, pending discussion. | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|IPv6 First-Hop Security, IPv6 ND spoofing. |**Roadmap** |Supported in Liberty release | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ -|IPv6 support in Neutron Layer3 High Availability |Yes | | -|(keepalived+VRRP). | | | -+-----------------------------------------------------------+-------------------------+--------------------------------------------------------------------+ + +-------------------------------------+-------------------------+---------------------------------+ + |Use Case / Requirement |Supported in Neutron |Notes | + +=====================================+=========================+=================================+ + |All topologies work in a multi-tenant|Yes |The IPv6 design is following the | + |environment | |Neutron tenant networks model; | + | | |dnsmasq is being used inside DHCP| + | | |network namespaces, while radvd | + | | |is being used inside Neutron | + | | |routers namespaces to provide | + | | |full isolation between tenants. | + | | |Tenant isolation can be based on | + | | |VLANs, GRE, or VXLAN | + | | |encapsulation. In case of | + | | |overlays, the transport network | + | | |(and VTEPs) must be IPv4 based as| + | | |of today. | + +-------------------------------------+-------------------------+---------------------------------+ + |IPv6 VM to VM only |Yes |It is possible to assign IPv6- | + | | |only addresses to VMs. Both | + | | |switching (within VMs on the same| + | | |tenant network) as well as east/ | + | | |west routing (between different | + | | |networks of the same tenant) are | + | | |supported. | + +-------------------------------------+-------------------------+---------------------------------+ + |IPv6 external L2 VLAN directly |Yes |IPv6 provider network model; RA | + |attached to a VM | |messages from upstream (external)| + | | |router are forwarded into the VMs| + +-------------------------------------+-------------------------+---------------------------------+ + |IPv6 subnet routed via L3 agent to an| |Configuration is enhanced in Kilo| + |external IPv6 network | |to allow easier setup of the | + | |1. Yes |upstream gateway, without the | + |1. Both VLAN and overlay (e.g. GRE, | |user forced to create an IPv6 | + | VXLAN) subnet attached to VMs; | |subnet for the external network. | + |2. Must be able to support multiple |2. Yes | | + | L3 agents for a given external | | | + | network to support scaling | | | + | (neutron scheduler to assign | | | + | vRouters to the L3 agents) | | | + +-------------------------------------+-------------------------+---------------------------------+ + |Ability for a NIC to support both | |Dual-stack is supported in | + |IPv4 and IPv6 (dual stack) address. | |Neutron with the addition of | + | | |``Multiple IPv6 Prefixes`` | + |1. VM with a single interface |1. Yes |Blueprint | + | associated with a network, which | | | + | is then associated with two | | | + | subnets | | | + |2. VM with two different interfaces |2. Yes | | + | associated with two different | | | + | networks and two different subnets| | | + +-------------------------------------+-------------------------+---------------------------------+ + |Support IPv6 Address assignment modes|1. Yes | | + | | | | + |1. SLAAC |2. Yes | | + |2. DHCPv6 Stateless | | | + |3. DHCPv6 Stateful |3. Yes | | + +-------------------------------------+-------------------------+---------------------------------+ + |Ability to create a port on an IPv6 |Yes | | + |DHCPv6 Stateful subnet and assign a | | | + |specific IPv6 address to the port and| | | + |have it taken out of the DHCP address| | | + |pool. | | | + +-------------------------------------+-------------------------+---------------------------------+ + |Ability to create a port with |**No** |The following patch disables this| + |fixed_ip for a SLAAC/DHCPv6-Stateless| |operation: https://review.opensta| + |Subnet. | |ck.org/#/c/129144/ | + +-------------------------------------+-------------------------+---------------------------------+ + |Support for private IPv6 to external |**Rejected** |Blueprint proposed in upstream | + |IPv6 floating IP; Ability to specify | |and got rejected. General | + |floating IPs via Neutron API (REST | |expectation is to avoid NAT with | + |and CLI) as well as via Horizon, | |IPv6 by assigning GUA to tenant | + |including combination of IPv6/IPv4 | |VMs. See https://review.openstack| + |and IPv4/IPv6 floating IPs if | |.org/#/c/139731/ for discussion. | + |implemented. | | | + +-------------------------------------+-------------------------+---------------------------------+ + |Provide IPv6/IPv4 feature parity in |**To-Do** |The L3 configuration should be | + |support for pass-through capabilities| |transparent for the SR-IOV | + |(e.g., SR-IOV). | |implementation. SR-IOV networking| + | | |support introduced in Juno based | + | | |on the ``sriovnicswitch`` ML2 | + | | |driver is expected to work with | + | | |IPv4 and IPv6 enabled VMs. We | + | | |need to verify if it works or not| + +-------------------------------------+-------------------------+---------------------------------+ + |Additional IPv6 extensions, for |**No** |It does not appear to be | + |example: IPSEC, IPv6 Anycast, | |considered yet (lack of clear | + |Multicast | |requirements) | + +-------------------------------------+-------------------------+---------------------------------+ + |VM access to the meta-data server to |**No** |This is currently not supported. | + |obtain user data, SSH keys, etc. | |Config-drive or dual-stack IPv4/ | + |using cloud-init with IPv6 only | |IPv6 can be used as a workaround | + |interfaces. | |(so that the IPv4 network is used| + | | |to obtain connectivity with the | + | | |metadata service) | + +-------------------------------------+-------------------------+---------------------------------+ + |Full support for IPv6 matching (i.e.,|Yes | | + |IPv6, ICMPv6, TCP, UDP) in security | | | + |groups. Ability to control and manage| | | + |all IPv6 security group capabilities | | | + |via Neutron/Nova API (REST and CLI) | | | + |as well as via Horizon. | | | + +-------------------------------------+-------------------------+---------------------------------+ + |During network/subnet/router create, |Yes |Two new Subnet attributes were | + |there should be an option to allow | |introduced to control IPv6 | + |user to specify the type of address | |address assignment options: | + |management they would like. This | | | + |includes all options including those | |* ``ipv6-ra-mode``: to determine | + |low priority if implemented (e.g., | | who sends Router Advertisements| + |toggle on/off router and address | | | + |prefix advertisements); It must be | |* ``ipv6-address-mode``: to | + |supported via Neutron API (REST and | | determine how VM obtains IPv6 | + |CLI) as well as via Horizon | | address, default gateway, and/ | + | | | or optional information. | + +-------------------------------------+-------------------------+---------------------------------+ + |Security groups anti-spoofing: |Yes | | + |Prevent VM from using a source | | | + |IPv6/MAC address which is not | | | + |assigned to the VM | | | + +-------------------------------------+-------------------------+---------------------------------+ + |Protect tenant and provider network |Yes |When using a tenant network, | + |from rough RAs | |Neutron is going to automatically| + | | |handle the filter rules to allow | + | | |connectivity of RAs to the VMs | + | | |only from the Neutron router | + | | |port; with provider networks, | + | | |users are required to specify the| + | | |LLA of the upstream router during| + | | |the subnet creation, or otherwise| + | | |manually edit the security-groups| + | | |rules to allow incoming traffic | + | | |from this specific address. | + +-------------------------------------+-------------------------+---------------------------------+ + |Support the ability to assign |Yes | | + |multiple IPv6 addresses to an | | | + |interface; both for Neutron router | | | + |interfaces and VM interfaces. | | | + +-------------------------------------+-------------------------+---------------------------------+ + |Ability for a VM to support a mix of |Yes | | + |multiple IPv4 and IPv6 networks, | | | + |including multiples of the same type.| | | + +-------------------------------------+-------------------------+---------------------------------+ + |Support for IPv6 Prefix Delegation. |**Roadmap** |Some partial support is available| + | | |in Liberty release | + +-------------------------------------+-------------------------+---------------------------------+ + |Distributed Virtual Routing (DVR) |**No** |Blueprint proposed upstream, | + |support for IPv6 | |pending discussion | + +-------------------------------------+-------------------------+---------------------------------+ + |IPv6 First-Hop Security, IPv6 ND |**Roadmap** |Supported in Liberty release | + |spoofing. | | | + +-------------------------------------+-------------------------+---------------------------------+ + |IPv6 support in Neutron Layer3 High |Yes | | + |Availability (keepalived+VRRP). | | | + +-------------------------------------+-------------------------+---------------------------------+ |