Joshua Boniface
31f252ad9b
Implements the ability for a client to watch almost-live domain
console logs from the hypervisors. It does this using a deque-based
"tail -f" mechanism (with a configurable buffer per-VM) that watches
the domain console logfile in the (configurable) directory every
half-second. It then stores the current buffer in Zookeeper when
changed, where a client can then request it, either as a static piece
of text in the `less` pager, or via a similar "tail -f" functionality
implemented using fixed line splitting and comparison to provide a
generally-seamless output.
Enabling this feature requires each guest VM to implement a Libvirt
serial log and write its (text) console to it, for example using the
default logging directory:
```
<serial type='pty'>
<log file='/var/log/libvirt/vmname.log' append='off'/>
<serial>
```
The append mode can be either on or off; on grows files unbounded,
off causes the log (and hence the PVC log data) to be truncated on
initial VM startup from offline. The administrator must choose how
they best want to handle this until Libvirt implements their own
clog-type logging format.
143 lines
6.1 KiB
YAML
143 lines
6.1 KiB
YAML
# pvcd cluster configuration file example
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#
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# This configuration file specifies details for this node in PVC. Multiple node
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# blocks can be added but only the one matching the current system nodename will
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# be used by the local daemon. Default values are not supported; the values in
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# this sample configuration are considered defaults and, with adjustment of the
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# nodename section and coordinators list, can be used as-is on a Debian system.
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#
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# Copy this example to /etc/pvc/pvcd.conf and edit to your needs
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pvc:
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# node: The (short) hostname of the node, set during provisioning
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node: pvc-hv1
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# functions: The daemon functions to enable
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functions:
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# enable_hypervisor: Enable or disable hypervisor functionality
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# This should never be False except in very advanced usecases
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enable_hypervisor: True
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# enable_networking: Enable or disable virtual networking and routing functionality
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enable_networking: True
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# enable_storage: Enable or disable Ceph storage management functionality
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enable_storage: True
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# cluster: Cluster-level configuration
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cluster:
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# coordinators: The list of cluster coordinator hostnames
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coordinators:
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- pvc-hv1
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- pvc-hv2
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- pvc-hv3
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# networks: Cluster-level network configuration
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# OPTIONAL if enable_networking: False
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networks:
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# upstream: Upstream routed network for in- and out-bound upstream networking
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upstream:
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# domain: Upstream domain name, may be None
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domain: "mydomain.net"
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# network: Upstream network block
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network: "1.1.1.0/24"
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# floating_ip: Upstream floating IP address for the primary coordinator
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floating_ip: "1.1.1.10/24"
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# gateway: Upstream static default gateway, if applicable
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gateway: "1.1.1.1"
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# cluster: Cluster internal network for node communication and client virtual networks
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cluster:
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# domain: Cluster internal domain name
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domain: "pvc.local"
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# network: Cluster internal network block
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network: "10.255.0.0/24"
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# floating_ip: Cluster internal floating IP address for the primary coordinator
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floating_ip: "10.255.0.254/24"
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# storage: Cluster internal network for storage traffic
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storage:
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# domain: Cluster storage domain name
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domain: "pvc.storage"
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# network: Cluster storage network block
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network: "10.254.0.0/24"
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# floating_ip: Cluster storage floating IP address for the primary coordinator
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floating_ip: "10.254.0.254/24"
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# coordinator: Coordinator-specific configuration
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# OPTIONAL if enable_networking: False
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coordinator:
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# dns: DNS aggregator subsystem
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dns:
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# database: MySQL Galera database configuration
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database:
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# host: MySQL hostname, invariably 'localhost'
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host: localhost
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# port: MySQL port, invariably 'localhost'
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port: 3306
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# name: MySQL database name, invariably 'pvcdns'
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name: pvcdns
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# user: MySQL username, invariable 'pvcdns'
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user: pvcdns
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# pass: MySQL user password, randomly generated
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pass: pvcdns
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# system: Local PVC instance configuration
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system:
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# fencing: Node fencing configuration
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fencing:
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# intervals: Intervals for fencing determination
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intervals:
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# keepalive_interval: Number of seconds between keepalive/status updates
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keepalive_interval: 5
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# fence_intervals: Number of keepalive_intervals to declare a node dead and fence it
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fence_intervals: 6
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# suicide_intervals: Numer of keepalive_intervals before a node considers itself dead and self-fences, 0 to disable
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suicide_intervals: 0
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# actions: Actions to take after a fence trigger
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actions:
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# successful_fence: Action to take after successfully fencing a node, options: migrate, None
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successful_fence: migrate
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# failed_fence: Action to take after failing to fence a node, options: migrate, None
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failed_fence: None
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# ipmi: Local system IPMI options
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ipmi:
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# host: Hostname/IP of the local system's IPMI interface, must be reachable
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host: pvc-hv1-lom
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# user: Local system IPMI username
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user: admin
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# pass: Local system IPMI password
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pass: Passw0rd
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# migration: Migration option configuration
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migration:
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# target_selector: Criteria to select the ideal migration target, options: mem, load, vcpus, vms
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target_selector: mem
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# configuration: Local system configurations
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configuration:
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# directories: PVC system directories
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directories:
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# dynamic_directory: Temporary in-memory directory for active configurations
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dynamic_directory: "/run/pvc"
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# log_directory: Logging directory
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log_directory: "/var/log/pvc"
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# console_log_directory: Libvirt console logging directory
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console_log_directory: "/var/log/libvirt"
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# logging: PVC logging configuration
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logging:
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# file_logging: Enable or disable logging to files under log_directory
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file_logging: True
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# stdout_logging: Enable or disable logging to stdout (i.e. journald)
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stdout_logging: True
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# console_log_lines: Number of console log lines to store in Zookeeper per VM
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console_log_lines: 1000
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# networking: PVC networking configuration
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# OPTIONAL if enable_networking: False
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networking:
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# devices: Interface devices configuration
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devices:
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# upstream: Upstream physical interface device
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upstream: ens4
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# cluster: Cluster (VNIC) physical interface device
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cluster: ens4
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# storage: Storage (Ceph) physical interface device
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storage: ens4
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# addresses: Special network addresses; by-id denotes "address octet equals host number", e.g. .3 for host3
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addresses:
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# upstream: Network address for upstream network, options: None, by-id, <static>/<mask>
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upstream: None
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# cluster: Network address for cluster network, options: by-id, <static>/<mask>
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cluster: by-id
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# storage: Network address for storage network, options: by-id, <static>/<mask>
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storage: by-id
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