Task #6869
Updated by Nico Schottelius over 5 years ago
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h2. Introduction
For proper growth and stability, we need to challenge our setup. We will try to replace opennebula with ucloud and at the same time challenge OpenStack.
This is not only a technical, but also a public project, which Sanghee will write the public story of.
ucloud supports IPv6 first and might only support IPv4 via NAT64 or proxying.
h2. General Requirements:
* a fully portable cloud management system that is API based, exposes all internals w/o secret keys
** supporting console via guacamole
** users in ldap
** api authentication in ungleich-otp
** firewalling in ufirewall (or similar)
* A great team
* To be built in less than 100 days
h2. Technology stack
* python3
** easy to read
* flask
** easy to understand
* ldap
** well known
* ungleich-otp
** for API authentication
* etcd
** storing VMs, networks, etc.
* nft (Linux), pf (BSD)
* JSON
** describing the data, easy to handle
* Prometheus
** For monitoring hosts and VMs
* VXLAN
** For networks
h2. Technical requirements
* ucloud should be portable
** While the primary target is Linux, it should run on FreeBSD/OpenBSD as well
* There should be no single point of failure
** APIs should be announced via BGP to the routers
** Switches will then use ECMP to load balance
** All APIs write to a distributed data store (v1: etcd) -> all data is distributed, too.
* Fast dead host detection
** Dead hosts should be detected fast, VMs should be rescheduled fast
h2. Components
h3. Scheduler
The scheduler knows about hosts, their capacities and their usage. The scheduler decides which VM gets scheduled where. The scheduler is also responsible for rescheduling VMs (f.i. due to another host becoming better for a specific VM).
h3. VM manager
Starts and stops VMs. Reacts on information from the scheduler. This component needs to support qemu on Linux and bhyve and co. on OpenBSD/FreeBSD.
h3. Network manager
Creates and manages virtual layer 2 networks. Basically does the following:
* Create VXLAN with correct IPv6 multicast address
h3. IPAM
Network address manager. Provides dhcpd/dhcp6d/router advertisements.
h3. Legacy IP supporter Metadata
For Provides access to to
* public ssh keys
* other data users who require legacy IP (IPv4), add a
provide
h3. Firewall
The VMs should not be able to interfere with other VMs or hosts in a malicious way. The following protective measures need to be implemented:
* prevent dhcpd answers in public networks
* prevent router advertisements in public networks
* prevent VM from using incorrect mac address
* prevent VM from using incorrect ipv6 addresses
Note to Nico: ping reyk for possible involvement
h3. Metadata
Provides access to to
* public ssh keys
* other data users provide
h3. Payment service
If a user requests a service and the service is not free, the user will be asked to pay for it.