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## Installing and using the Parallel Virtual Cluster suite
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Note: This document describes PVC v0.4. This version of PVC implements the core functionality, with the virtual machine manager and virtual networking being fully implemented and functional. Future versions will finish implementation of virtual storage, bootstrapping, provisioning, and the API interface.
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## Building
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The repository contains the required elements to build Debian packages for PVC. It is not handled like a normal Python package but instead the debs contain the raw files placed in Debianized places. Only Debian Buster (10.X) is supported as the cluster base operating system.
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1. Run `build-deb.sh`; you will need `dpkg-buildpackage` installed.
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1. The output files for each daemon and client will be located in the parent directory.
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1. Copy the `.deb` files to the target systems.
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## Installing
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### Virtual Manager only
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PVC v0.4 requires manual setup of the base OS and Zookeeper cluster on the target systems. Future versions will include full bootstrapping support. This set of instructions covers setting up a virtual manager only system, requiring all networking and storage to be configured by the administrator. Future versions will enable these functions by default.
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A single-host cluster is possible for testing, however it is not recommended for production deployments due to the lack of redundancy. For a single-host cluster, follow the steps below but only on a single machine.
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1. Deploy Debian Buster to 3, or more, physical servers. Ensure the servers are configured and connected based on the [documentation](/about.md#physical-infrastructure).
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1. On the first 3 physical servers, deploy Zookeeper (Debian packages `zookeeper` and `zookeeperd`) in a cluster configuration. After this, Zookeeper should be available on port `2181` on all 3 nodes.
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1. Set up virtual storage and networking as required.
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1. Install the PVC packages generated in the previous section. Use `apt -f install` to correct dependency issues. The `pvcd` service will fail to start; this is expected.
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1. Create the `/etc/pvc/pvcd.yaml` daemon configuration file, using the template available at `/etc/pvc/pvcd.sample.yaml`. An example configuration for a virtual manager only cluster's first host would be:
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---
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pvc:
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node: node1
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functions:
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enable_hypervisor: True
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enable_networking: False
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enable_storage: False
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cluster:
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coordinators:
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- node1
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- node2
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- node3
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system:
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fencing:
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intervals:
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keepalive_interval: 5
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fence_intervals: 6
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suicide_intervals: 0
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actions:
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successful_fence: migrate
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failed_fence: None
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ipmi:
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host: node1-lom # Ensure this is reachable from the nodes
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user: myipmiuser
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pass: myipmiPassw0rd
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migration:
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target_selector: mem
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configuration:
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directories:
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dynamic_directory: "/run/pvc"
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log_directory: "/var/log/pvc"
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logging:
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file_logging: True
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stdout_logging: True
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1. Start the PVC daemon (`systemctl start pvcd`) on the first node. On startup, the daemon will connect to the Zookeeper cluster and automatically add itself to the configuration. Verify it is running with `journalctl -u pvcd -o cat` and that it is sending keepalives to the cluster.
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1. Use the client CLI on the first node to verify the node is up and running:
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$ pvc node list
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Name St: Daemon Coordinator Domain Res: VMs CPUs Load Mem (M): Total Used Free VMs
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node1 run primary flushed 0 24 0.41 91508 2620 88888 0
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The `Daemon` mode should be `run`, and on initial startup the `Domain` mode will be `flushed` to prevent VMs being immediately provisioned or migrated to the new node.
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1. Start the PVC daemon on the other nodes as well, verifying their status in the same way as the first node.
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1. Use the client CLI on the first node to set the first node into ready state:
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$ pvc node ready node1
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Restoring hypervisor node1 to active service.
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The `Domain` state for the node will now be `ready`.
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1. Repeat the previous step for the other two nodes. The cluster is now ready to handle virtual machines.
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1. Provision a KVM virtual machine using whatever tools or methods you choose, and obtain the Libvirt `.xml` domain definition file. Note that virtual network bridges should use the form `vmbrXXX`, where `XXX` is the vLAN ID or another numeric identifier.
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1. Define the VM in the cluster using the CLI tool:
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$ pvc vm define --target node1 path/to/test1.xml
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Adding new VM with Name "test1" and UUID "5115d00f-9f11-4899-9edf-5a35bf76d6b4" to database.
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1. Verify that the new VM is present:
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$ pvc vm list
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Name UUID State Networks RAM (M) vCPUs Node Migrated
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test1 5115d00f-9f11-4899-9edf-5a35bf76d6b4 stop 101 1024 1 node1 no
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1. Start the new VM and verify it is running:
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$ pvc vm start test1
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Starting VM "5115d00f-9f11-4899-9edf-5a35bf76d6b4".
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$ pvc vm info test1
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Virtual machine information:
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UUID: 5115d00f-9f11-4899-9edf-5a35bf76d6b4
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Name: test1
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Description: Testing host
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Memory (M): 1024
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vCPUs: 1
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Topology (S/C/T): 1/1/1
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State: start
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Current Node: node1
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Previous Node: N/A
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Networks: 101 [invalid]
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Congratulations, you have deployed a simple PVC cluster! Add any further VMs or nodes you require using the same procedure, though additional nodes do not need to be in the `coordinators:` list.
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### With virtual networking support
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In addition to a virtual manager only setup, PVC v0.4 supports a setup with virtual networking support as well. This configuration enables management of both simple bridged and managed networking within the cluster, and requires additional setup steps.
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1. Perform the first 4 steps of the previous section.
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1. Deploy a MariaDB Galera cluster among the coordinators. Follow the [PowerDNS guide](https://doc.powerdns.com/md/authoritative/backend-generic-mysql/#default-schema) to create a PowerDNS authoritative database schema on the cluster.
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1. Configure the `/etc/pvc/pvcd.yaml` file based on the `/etc/pvc/pvcd.sample.yaml` file, this time not removing any major sections. Fill in the required values for the MySQL DNS database, the various interfaces and networks, and set `enable_networking: True`.
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1. Proceed with the remainder of the previous section.
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1. Configure networks with the `pvc network` CLI utility:
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$ pvc network add 1001 -p bridged -d test-net-1
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Network "test-net-1" added successfully!
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$ pvc network add 1002 -p managed -d test-net-2 -i 10.200.0.0/24 -g 10.200.0.1
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Network "test-net-2" added successfully!
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$ pvc network list
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VNI Description Type Domain IPv6 DHCPv6 IPv4 DHCPv4
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1001 test1 bridged None False False False False
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1002 test2 managed test2 False False True False
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1. Configure any static ACLs, enable DHCP, or perform other network management functions using the CLI utility. See `pvc network -h` for the high-level commands available.
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