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The check runs only when MemoryQoS feature gate is enabled and cgroups v2 is in use. It logs a warning but does not block kubelet startup, since RHEL/LTS kernels may backport the fix without bumping the version. Signed-off-by: Sohan Kunkerkar <sohank2602@gmail.com>
66 lines
3.6 KiB
Go
66 lines
3.6 KiB
Go
/*
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Copyright 2023 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kernel
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// IPLocalReservedPortsNamespacedKernelVersion is the kernel version in which net.ipv4.ip_local_reserved_ports was namespaced(netns).
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// (ref: https://github.com/torvalds/linux/commit/122ff243f5f104194750ecbc76d5946dd1eec934)
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const IPLocalReservedPortsNamespacedKernelVersion = "3.16"
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// IPVSConnReuseModeMinSupportedKernelVersion is the minium kernel version supporting net.ipv4.vs.conn_reuse_mode.
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// (ref: https://github.com/torvalds/linux/commit/d752c364571743d696c2a54a449ce77550c35ac5)
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const IPVSConnReuseModeMinSupportedKernelVersion = "4.1"
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// TCPKeepAliveTimeNamespacedKernelVersion is the kernel version in which net.ipv4.tcp_keepalive_time was namespaced(netns).
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// (ref: https://github.com/torvalds/linux/commit/13b287e8d1cad951634389f85b8c9b816bd3bb1e)
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const TCPKeepAliveTimeNamespacedKernelVersion = "4.5"
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// TCPKeepAliveIntervalNamespacedKernelVersion is the kernel version in which net.ipv4.tcp_keepalive_intvl was namespaced(netns).
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// (ref: https://github.com/torvalds/linux/commit/b840d15d39128d08ed4486085e5507d2617b9ae1)
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const TCPKeepAliveIntervalNamespacedKernelVersion = "4.5"
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// TCPKeepAliveProbesNamespacedKernelVersion is the kernel version in which net.ipv4.tcp_keepalive_probes was namespaced(netns).
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// (ref: https://github.com/torvalds/linux/commit/9bd6861bd4326e3afd3f14a9ec8a723771fb20bb)
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const TCPKeepAliveProbesNamespacedKernelVersion = "4.5"
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// TCPFinTimeoutNamespacedKernelVersion is the kernel version in which net.ipv4.tcp_fin_timeout was namespaced(netns).
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// (ref: https://github.com/torvalds/linux/commit/1e579caa18b96f9eb18f4f5416658cd15f37c062)
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const TCPFinTimeoutNamespacedKernelVersion = "4.6"
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// IPVSConnReuseModeFixedKernelVersion is the kernel version in which net.ipv4.vs.conn_reuse_mode was fixed.
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// (ref: https://github.com/torvalds/linux/commit/35dfb013149f74c2be1ff9c78f14e6a3cd1539d1)
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const IPVSConnReuseModeFixedKernelVersion = "5.9"
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const TmpfsNoswapSupportKernelVersion = "6.4"
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// NFTablesKubeProxyKernelVersion is the lowest kernel version kube-proxy supports using
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// nftables mode with by default. This is not directly related to any specific kernel
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// commit; see https://issues.k8s.io/122743#issuecomment-1893922424
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const NFTablesKubeProxyKernelVersion = "5.13"
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// TCPReceiveMemoryNamespacedKernelVersion is the kernel version in which net.ipv4.tcp_rmem was namespaced(netns).
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// (ref: https://github.com/torvalds/linux/commit/356d1833b638bd465672aefeb71def3ab93fc17d)
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const TCPReceiveMemoryNamespacedKernelVersion = "4.15"
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// TCPTransmitMemoryNamespacedKernelVersion is the kernel version in which net.ipv4.tcp_wmem was namespaced(netns).
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// (ref: https://github.com/torvalds/linux/commit/356d1833b638bd465672aefeb71def3ab93fc17d)
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const TCPTransmitMemoryNamespacedKernelVersion = "4.15"
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// MemoryQoSMinKernelVersion is the minimum kernel version for safe memory.high throttling.
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// Kernels older than 5.9 have a livelock bug where processes can get stuck in an infinite
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// reclaim loop at the memory.high boundary.
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// (ref: https://github.com/torvalds/linux/commit/b3ff92916af3156df27716bb080a407e4caf9085)
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const MemoryQoSMinKernelVersion = "5.9"
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