182 lines
8.5 KiB
Python
182 lines
8.5 KiB
Python
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#!/usr/bin/env python3
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# networking.py - Utility functions for pvcnoded networking
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018-2021 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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import daemon_lib.common as common
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from time import sleep
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from os import makedirs
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def setup_sriov(logger, config):
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logger.out('Setting up SR-IOV device support', state='i')
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# Enable unsafe interrupts for the vfio_iommu_type1 kernel module
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try:
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common.run_os_command('modprobe vfio_iommu_type1 allow_unsafe_interrupts=1')
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with open('/sys/module/vfio_iommu_type1/parameters/allow_unsafe_interrupts', 'w') as mfh:
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mfh.write('Y')
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except Exception:
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logger.out('Failed to enable vfio_iommu_type1 kernel module; SR-IOV may fail', state='w')
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# Loop through our SR-IOV NICs and enable the numvfs for each
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for device in config['sriov_device']:
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logger.out(f'Preparing SR-IOV PF {device["phy"]} with {device["vfcount"]} VFs', state='i')
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try:
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with open(f'/sys/class/net/{device["phy"]}/device/sriov_numvfs', 'r') as vfh:
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current_vf_count = vfh.read().strip()
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with open(f'/sys/class/net/{device["phy"]}/device/sriov_numvfs', 'w') as vfh:
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vfh.write(str(device['vfcount']))
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except FileNotFoundError:
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logger.out(f'Failed to open SR-IOV configuration for PF {device["phy"]}; device may not support SR-IOV', state='w')
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except OSError:
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logger.out(f'Failed to set SR-IOV VF count for PF {device["phy"]} to {device["vfcount"]}; already set to {current_vf_count}', state='w')
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if device.get('mtu', None) is not None:
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logger.out(f'Setting SR-IOV PF {device["phy"]} to MTU {device["mtu"]}', state='i')
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common.run_os_command(f'ip link set {device["phy"]} mtu {device["mtu"]} up')
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def setup_interfaces(logger, config):
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# Set up the Cluster interface
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cluster_dev = config['cluster_dev']
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cluster_mtu = config['cluster_mtu']
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cluster_dev_ip = config['cluster_dev_ip']
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logger.out(f'Setting up Cluster network interface {cluster_dev} with MTU {cluster_mtu}', state='i')
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common.run_os_command(f'ip link set {cluster_dev} mtu {cluster_mtu} up')
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logger.out(f'Setting up Cluster network bridge on interface {cluster_dev} with IP {cluster_dev_ip}', state='i')
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common.run_os_command(f'brctl addbr brcluster')
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common.run_os_command(f'brctl addif brcluster {cluster_dev}')
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common.run_os_command(f'ip link set brcluster mtu {cluster_mtu} up')
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common.run_os_command(f'ip address add {cluster_dev_ip} dev brcluster')
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# Set up the Storage interface
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storage_dev = config['storage_dev']
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storage_mtu = config['storage_mtu']
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storage_dev_ip = config['storage_dev_ip']
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logger.out(f'Setting up Storage network interface {storage_dev} with MTU {storage_mtu}', state='i')
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common.run_os_command(f'ip link set {storage_dev} mtu {storage_mtu} up')
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if storage_dev == cluster_dev:
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if storage_dev_ip != cluster_dev_ip:
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logger.out(f'Setting up Storage network on Cluster network bridge with IP {storage_dev_ip}', state='i')
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common.run_os_command(f'ip address add {storage_dev_ip} dev brcluster')
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else:
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logger.out(f'Setting up Storage network bridge on interface {storage_dev} with IP {storage_dev_ip}', state='i')
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common.run_os_command(f'brctl addbr brstorage')
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common.run_os_command(f'brctl addif brstorage {storage_dev}')
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common.run_os_command(f'ip link set brstorage mtu {storage_mtu} up')
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common.run_os_command(f'ip address add {storage_dev_ip} dev brstorage')
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# Set up the Upstream interface
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upstream_dev = config['upstream_dev']
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upstream_mtu = config['upstream_mtu']
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upstream_dev_ip = config['upstream_dev_ip']
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logger.out(f'Setting up Upstream network interface {upstream_dev} with MTU {upstream_mtu}', state='i')
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if upstream_dev == cluster_dev:
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if upstream_dev_ip != cluster_dev_ip:
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logger.out(f'Setting up Upstream network on Cluster network bridge with IP {upstream_dev_ip}', state='i')
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common.run_os_command(f'ip address add {upstream_dev_ip} dev brcluster')
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else:
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logger.out(f'Setting up Upstream network bridge on interface {upstream_dev} with IP {upstream_dev_ip}', state='i')
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common.run_os_command(f'brctl addbr brupstream')
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common.run_os_command(f'brctl addif brupstream {upstream_dev}')
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common.run_os_command(f'ip link set brupstream mtu {upstream_mtu} up')
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common.run_os_command(f'ip address add {upstream_dev_ip} dev brupstream')
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upstream_gateway = config['upstream_gateway']
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if upstream_gateway is not None:
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logger.out(f'Setting up Upstream networok default gateway IP {upstream_gateway}', state='i')
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if upstream_dev == cluster_dev:
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common.run_os_command(f'ip route add default via {upstream_gateway} dev brcluster')
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else:
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common.run_os_command(f'ip route add default via {upstream_gateway} dev brupstream')
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# Set up sysctl tweaks to optimize networking
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# Enable routing functions
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common.run_os_command('sysctl net.ipv4.ip_forward=1')
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common.run_os_command('sysctl net.ipv6.ip_forward=1')
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# Enable send redirects
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common.run_os_command('sysctl net.ipv4.conf.all.send_redirects=1')
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common.run_os_command('sysctl net.ipv4.conf.default.send_redirects=1')
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common.run_os_command('sysctl net.ipv6.conf.all.send_redirects=1')
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common.run_os_command('sysctl net.ipv6.conf.default.send_redirects=1')
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# Accept source routes
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common.run_os_command('sysctl net.ipv4.conf.all.accept_source_route=1')
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common.run_os_command('sysctl net.ipv4.conf.default.accept_source_route=1')
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common.run_os_command('sysctl net.ipv6.conf.all.accept_source_route=1')
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common.run_os_command('sysctl net.ipv6.conf.default.accept_source_route=1')
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# Disable RP filtering on Cluster and Upstream interfaces (to allow traffic pivoting)
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common.run_os_command(f'sysctl net.ipv4.conf.{cluster_dev}.rp_filter=0')
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common.run_os_command(f'sysctl net.ipv4.conf.brcluster.rp_filter=0')
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common.run_os_command(f'sysctl net.ipv4.conf.{upstream_dev}.rp_filter=0')
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common.run_os_command(f'sysctl net.ipv4.conf.brupstream.rp_filter=0')
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common.run_os_command(f'sysctl net.ipv6.conf.{cluster_dev}.rp_filter=0')
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common.run_os_command(f'sysctl net.ipv6.conf.brcluster.rp_filter=0')
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common.run_os_command(f'sysctl net.ipv6.conf.{upstream_dev}.rp_filter=0')
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common.run_os_command(f'sysctl net.ipv6.conf.brupstream.rp_filter=0')
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# Stop DNSMasq if it is running
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common.run_os_command('systemctl stop dnsmasq.service')
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logger.out('Waiting 3 seconds for networking to come up', state='s')
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sleep(3)
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def create_nft_configuration(logger, config):
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if config['enable_networking']:
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logger.out('Creating NFT firewall configuration', state='i')
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dynamic_directory = config['nft_dynamic_directory']
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# Create directories
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makedirs(f'{dynamic_directory}/networks', exist_ok=True)
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makedirs(f'{dynamic_directory}/static', exist_ok=True)
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# Set up the base rules
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nftables_base_rules = f"""# Base rules
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flush ruleset
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# Add the filter table and chains
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add table inet filter
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add chain inet filter forward {{ type filter hook forward priority 0; }}
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add chain inet filter input {{ type filter hook input priority 0; }}
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# Include static rules and network rules
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include "{dynamic_directory}/static/*"
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include "{dynamic_directory}/networks/*"
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"""
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# Write the base firewall config
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nftables_base_filename = f'{dynamic_directory}/base.nft'
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with open(nftables_base_filename, 'w') as nftfh:
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nftfh.write(nftables_base_rules)
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common.reload_firewall_rules(nftables_base_filename, logger)
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