fix: audit and fix cgroup reservations

[smira]

Fixes: #7081

Review all reservations and limits set, test under stress load (using both memory and CPU).

The goal: system components (Talos itself) and runtime (kubelet, CRI) should survive under extreme resource starvation (workloads consuming all CPU/memory).

Uses #9337 to visualize changes, but doesn't depend on it.

[smira]

Controlplane:

NAME                                                                              MemCurrent   MemPeak    MemLow     Peak/Low   MemHigh    MemMin     Current/Min   MemMax     CpuWeight   CpuNice   CpuMax
.                                                                                    unset        unset      unset    unset%       unset      unset    unset%          unset    unset       unset    []
├──init                                                                            130 MiB      136 MiB    192 MiB    70.99%         max     96 MiB   135.93%            max       79           1    [   max 100000]
├──kubepods                                                                        658 MiB      674 MiB        0 B      max%         max        0 B      max%        1.5 GiB       77           1    [   max 100000]
│   ├──besteffort                                                                   68 MiB       73 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│   │   └──podf1f58515-b3d0-4732-8d57-a1d2d6eded15                                  68 MiB       73 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│   │       ├──17d1cef028c6597bf26ad0e52cf3a839eec909ac1170080d135a31e909e10bc2     68 MiB       73 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│   │       └──2373b772e588345784d51c86493262c6bd316d37333c773713ed893b3b9a0989    184 KiB      2.0 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│   └──burstable                                                                   590 MiB      606 MiB        0 B      max%         max        0 B      max%            max       18           8    [   max 100000]
│       ├──pod32c6547b9d144ffac5df87f44fe94431                                      71 MiB       74 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│       │   ├──77c5d8300fed810e3e3a7f4d3d934bf988622e4a39192938d9b38507aa57f54f     71 MiB       74 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│       │   └──e23d3a6faf8e84100d6671200d4a146458175d68a0dc7ca599726eea31f6e71b    220 KiB      3.3 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│       ├──pod5261417e-9670-4faf-8962-e678cd828090                                  47 MiB       50 MiB        0 B      max%         max        0 B      max%            max        4          14    [   max 100000]
│       │   ├──3cacde9de64a796592c63940658616ee598cff7c341753663d268e09b88d4456     46 MiB       48 MiB        0 B      max%         max        0 B      max%            max        4          14    [   max 100000]
│       │   └──ac59c6ae5bb59b10e2b709bc8f2ded3bd66fbd68e9acf9c09f4fa47bc529060e    212 KiB      3.1 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│       ├──podb5baa3da5406ac99f9ab6c1988aedeb2                                     335 MiB      347 MiB        0 B      max%         max        0 B      max%            max        8          11    [   max 100000]
│       │   ├──45edc4a93966060042610ffa5e6001c951c1a92d4f5ee123e88fe4cb49df5ba5    334 MiB      346 MiB        0 B      max%         max        0 B      max%            max        8          11    [   max 100000]
│       │   └──57e5a4d6d58ee94629bb083f550a09dbe918f2dc48759eec671fe8c3146551e8    908 KiB      3.8 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│       ├──podb95bf81a197c195dc9c8217a98d7edbd                                      79 MiB       82 MiB        0 B      max%         max        0 B      max%            max        2          18    [   max 100000]
│       │   ├──3a255a894710a279530dbbb12d0126dab43fa4539d7d56f338e15b8d23298d14     79 MiB       82 MiB        0 B      max%         max        0 B      max%            max        2          18    [   max 100000]
│       │   └──6b5057351e4527dbf78879f2cd1fbea8cf494dcde8440945ca9d2861672444da    216 KiB      3.3 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│       └──podfcd5e65a-dafa-4a74-91c9-2d6a1702b69a                                  58 MiB       58 MiB        0 B      max%         max        0 B      max%        170 MiB        4          14    [   max 100000]
│           ├──0328ca2caf91426cde6d098cf1bb1e334ba50ad800fd2a1ac39dbfaece947bd8    220 KiB      3.5 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│           └──ff55a6c8557732b49cbe9e014e34283316d427be1dfa09b406e5c275de43aec6     57 MiB       58 MiB        0 B      max%         max        0 B      max%        170 MiB        4          14    [   max 100000]
├──podruntime                                                                      554 MiB      579 MiB        0 B      max%         max        0 B      max%            max       79           1    [   max 100000]
│   ├──etcd                                                                        365 MiB      391 MiB    256 MiB   152.57%         max        0 B      max%            max       79           1    [   max 100000]
│   ├──kubelet                                                                     105 MiB      106 MiB    192 MiB    55.23%         max     96 MiB   109.63%            max       39           4    [   max 100000]
│   └──runtime                                                                      83 MiB       83 MiB    512 MiB    16.28%         max    256 MiB    32.34%            max       39           4    [   max 100000]
└──system                                                                          237 MiB      238 MiB    192 MiB   123.97%         max     96 MiB   246.54%            max       59           2    [   max 100000]
    ├──apid                                                                         34 MiB       35 MiB     32 MiB   108.52%         max     16 MiB   211.45%         40 MiB       20           7    [   max 100000]
    ├──dashboard                                                                   112 MiB      112 MiB        0 B      max%         max        0 B      max%        196 MiB        8          11    [   max 100000]
    ├──runtime                                                                      74 MiB       78 MiB     96 MiB    81.16%         max     48 MiB   154.97%            max       20           7    [   max 100000]
    ├──trustd                                                                       10 MiB       11 MiB     16 MiB    69.07%         max    8.0 MiB   126.71%         24 MiB       10          10    [   max 100000]
    └──udevd                                                                       6.8 MiB       14 MiB     16 MiB    87.87%         max    8.0 MiB    84.86%            max       10          10    [   max 100000]

[smira]

Worker:

NAME                                                                              MemCurrent   MemPeak    MemLow     Peak/Low   MemHigh    MemMin     Current/Min   MemMax     CpuWeight   CpuNice   CpuMax
.                                                                                    unset        unset      unset    unset%       unset      unset    unset%          unset    unset       unset    []
├──init                                                                            103 MiB      128 MiB    192 MiB    66.80%         max     96 MiB   107.17%            max       79           1    [   max 100000]
├──kubepods                                                                         67 MiB      2.2 GiB        0 B      max%         max        0 B      max%        2.4 GiB      155          -2    [   max 100000]
│   ├──besteffort                                                                   36 MiB      2.2 GiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│   │   └──pod6c6eece8-04cd-401f-bf7f-9ddf6ef2fa69                                  33 MiB       73 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│   │       ├──47facd76839a9bebb74f86edfae821ef84911d8c752b5ab336e3eac1804a545d     33 MiB       72 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│   │       └──a590bdc89f065055c5a7006db5fe27787822d4da4e037c2bfa841df50a6bc34a    160 KiB      2.2 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
│   └──burstable                                                                    30 MiB       46 MiB        0 B      max%         max        0 B      max%            max        4          14    [   max 100000]
│       └──podfff3d464-0b0c-4adc-a5f1-d2f0017537a1                                  30 MiB       46 MiB        0 B      max%         max        0 B      max%            max        4          14    [   max 100000]
│           ├──752089319f548c1d38d75c8d97abe0049cc2d448e28994d7049ee3fce7bf51d7     30 MiB       45 MiB        0 B      max%         max        0 B      max%            max        4          14    [   max 100000]
│           └──76ea1925687b151ff1b3f0d9cf59c5485e4bba862b110614b8f8572fba3f24f5    188 KiB      3.2 MiB        0 B      max%         max        0 B      max%            max        1          19    [   max 100000]
├──podruntime                                                                      169 MiB      332 MiB        0 B      max%         max        0 B      max%            max      157          -2    [   max 100000]
│   ├──kubelet                                                                      82 MiB      101 MiB    192 MiB    52.70%         max     96 MiB    85.88%            max       39           4    [   max 100000]
│   └──runtime                                                                      86 MiB      240 MiB    392 MiB    61.21%         max    196 MiB    43.94%            max       39           4    [   max 100000]
└──system                                                                          110 MiB      199 MiB    192 MiB   103.76%         max     96 MiB   114.68%            max       59           2    [   max 100000]
    ├──apid                                                                         18 MiB       25 MiB     32 MiB    78.49%         max     16 MiB   114.09%         40 MiB       20           7    [   max 100000]
    ├──dashboard                                                                    55 MiB      112 MiB        0 B      max%         max        0 B      max%        196 MiB        8          11    [   max 100000]
    ├──runtime                                                                      31 MiB       59 MiB     96 MiB    61.46%         max     48 MiB    64.66%            max       20           7    [   max 100000]
    ├──trustd                                                                          0 B          0 B     16 MiB     0.00%         max    8.0 MiB     0.00%         24 MiB       10          10    [   max 100000]
    └──udevd                                                                       6.0 MiB       14 MiB     16 MiB    87.87%         max    8.0 MiB    74.76%            max       10          10    [   max 100000]

[Unix4ever]

🆒