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annotate kube.py @ 287:c094d23b7943

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author drewp@bigasterisk.com
date Sun, 21 Apr 2024 14:03:04 -0700
parents e10ee3ddadcf
children 3af02e24eaf9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import os
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2
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3 from pyinfra import host
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4 from pyinfra.facts.files import FindInFile
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5 from pyinfra.facts.server import Arch, LinuxDistribution
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6 from pyinfra.operations import files, server, systemd
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7
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8 is_pi = host.get_fact(LinuxDistribution)['name'] in ['Debian', 'Raspbian GNU/Linux']
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9
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10 # https://github.com/GoogleContainerTools/skaffold/releases
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11 skaffold_version = 'v2.10.1'
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13
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14 def download_k3s(k3s_version):
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15 tail = 'k3s' if host.get_fact(Arch) == 'x86_64' else 'k3s-armhf'
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16 if host.get_fact(Arch) == 'aarch64':
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17 tail = 'k3s-arm64'
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18 files.download(
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19 src=f'https://github.com/rancher/k3s/releases/download/{k3s_version}/{tail}',
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20 dest='/usr/local/bin/k3s',
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21 user='root',
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22 group='root',
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23 mode='755',
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24 cache_time=43000,
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25 # force=True, # to get a new version
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26 )
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29 def install_skaffold():
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30 files.download(src=f'https://storage.googleapis.com/skaffold/releases/{skaffold_version}/skaffold-linux-amd64',
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31 dest='/usr/local/bin/skaffold',
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32 user='root',
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33 group='root',
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34 mode='755',
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35 cache_time=1000)
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36 # one time; writes to $HOME
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37 server.shell("skaffold config set --global insecure-registries reg:5000")
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39
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40 def pi_cgroup_setup():
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41 '''
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42 fixes this:
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43
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44 Mar 29 23:47:11 ws-printer k3s[5999]: time="2024-03-29T23:47:11-07:00" level=fatal msg="failed to find memory cgroup (v2)"
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45 '''
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46 return 'cmdline.txt lives on pipe now, not on the pi host'
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47 old_cmdline = host.get_fact(FindInFile, path='/boot/cmdline.txt', pattern=r'.*')[0]
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48 if 'cgroup' not in old_cmdline:
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49 cmdline = old_cmdline + ' cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
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50 files.line(path='/boot/cmdline.txt', line='.*', replace=cmdline)
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51 # pi needs reboot now
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53
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54 def host_prep():
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55 server.sysctl(key='net.ipv4.ip_forward', value="1", persist=True)
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56 server.sysctl(key='net.ipv6.conf.all.forwarding', value="1", persist=True)
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57 server.sysctl(key='fs.inotify.max_user_instances', value='8192', persist=True)
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58 server.sysctl(key='fs.inotify.max_user_watches', value='524288', persist=True)
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59
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60 # https://sysctl-explorer.net/net/ipv4/rp_filter/
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61 none, strict, loose = 0, 1, 2
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62 server.sysctl(key='net.ipv4.conf.default.rp_filter', value=loose, persist=True)
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63
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64 if is_pi:
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65 pi_cgroup_setup()
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68 # don't try to get aufs-dkms on rpi-- https://github.com/docker/for-linux/issues/709
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69 def podman_insecure_registry(reg):
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70 files.template(src='templates/kube/podman_registries.conf.j2', dest='/etc/containers/registries.conf.d/reg.conf', reg=reg)
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71 systemd.service(service='podman', user_mode=True)
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72 systemd.service(service='podman.socket', user_mode=True)
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75 def config_and_run_service(k3s_version, server_node, server_ip):
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76 download_k3s(k3s_version)
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77 service_name = 'k3s.service' if host.name == server_node else 'k3s-node.service'
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78 role = 'server' if host.name == server_node else 'agent'
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79 which_conf = 'config-server.yaml.j2' if host.name == server_node else 'config-agent.yaml.j2'
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81 # /var/lib/rancher/k3s/server/node-token is the source of the string in secrets/k3s_token,
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82 # so this presumes a previous run
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83 if host.name == server_node:
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84 token = "ununsed"
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85 else:
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86 # this assumes localhost is the k3s server.
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87 if not os.path.exists('/var/lib/rancher/k3s/server/node-token'):
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88 print("first pass is for server only- skipping other nodes")
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89 return
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90 token = open('/var/lib/rancher/k3s/server/node-token', 'rt').read().strip()
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91 files.template(
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92 src=f'templates/kube/{which_conf}',
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93 dest='/etc/k3s_config.yaml',
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94 server_ip=server_ip,
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95 token=token,
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96 wg_ip=host.host_data['wireguard_address'],
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97 )
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98 files.template(
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99 src='templates/kube/k3s.service.j2',
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100 dest=f'/etc/systemd/system/{service_name}',
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101 role=role,
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102 )
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103 if host.name in ['bang', 'garage']:
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104 # no supported gpu
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105 '''
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106 kubectl label --overwrite node bang nvidia.com/gpu.deploy.gpu-feature-discovery=false
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107 kubectl label --overwrite node bang nvidia.com/gpu.deploy.container-toolkit=false
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108 kubectl label --overwrite node bang nvidia.com/gpu.deploy.dcgm-exporter=false
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109 kubectl label --overwrite node bang nvidia.com/gpu.deploy.device-plugin=false
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110 kubectl label --overwrite node bang nvidia.com/gpu.deploy.driver=false
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111 kubectl label --overwrite node bang nvidia.com/gpu.deploy.mig-manager=false
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112 kubectl label --overwrite node bang nvidia.com/gpu.deploy.operator-validator=false
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113 '''
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114 systemd.service(service=service_name, daemon_reload=True, enabled=True, restarted=True)
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115
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116
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117 def setupNvidiaToolkit():
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118 # guides:
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119 # https://github.com/NVIDIA/k8s-device-plugin#prerequisites
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120 # https://docs.k3s.io/advanced#nvidia-container-runtime-support
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121 # apply this once to kube-system: https://raw.githubusercontent.com/NVIDIA/k8s-device-plugin/v0.14.3/nvidia-device-plugin.yml
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122 # apply this once: https://raw.githubusercontent.com/NVIDIA/gpu-feature-discovery/v0.8.2/deployments/static/nfd.yaml
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123 # and: kubectl apply -f https://raw.githubusercontent.com/NVIDIA/gpu-feature-discovery/v0.8.2/deployments/static/gpu-feature-discovery-daemonset.yaml
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124
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125 # k3s says they do this:
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126 #server.shell('nvidia-ctk runtime configure --runtime=containerd --config /var/lib/rancher/k3s/agent/etc/containerd/config.toml')
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127
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128 # then caller restarts k3s which includes containerd
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129
265
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130 # tried https://github.com/k3s-io/k3s/discussions/9231#discussioncomment-8114243
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131 pass
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132
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133
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134 def make_cluster(
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135 server_ip,
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136 server_node,
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137 nodes,
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138 admin_from,
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139 # https://github.com/k3s-io/k3s/releases
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140 # 1.23.6 per https://github.com/cilium/cilium/issues/20331
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141 k3s_version,
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142 ):
89
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143
204
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144 if host.name in nodes + [server_node]:
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145 host_prep()
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146 files.directory(path='/etc/rancher/k3s')
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147
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148 # docs: https://rancher.com/docs/k3s/latest/en/installation/private-registry/
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149 # user confusions: https://github.com/rancher/k3s/issues/1802
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150 files.template(src='templates/kube/registries.yaml.j2', dest='/etc/rancher/k3s/registries.yaml', reg='reg:5000')
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151 # also note that podman dropped the default `docker.io/` prefix on image names (see https://unix.stackexchange.com/a/701785/419418)
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152 config_and_run_service(k3s_version, server_node, server_ip)
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153
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154 if host.name in admin_from:
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155 podman_insecure_registry(reg='reg:5000')
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156 files.directory(path='/etc/rancher/k3s')
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157 install_skaffold()
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158 files.link(path='/usr/local/bin/kubectl', target='/usr/local/bin/k3s')
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159 files.directory(path='/home/drewp/.kube', user='drewp', group='drewp')
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160
204
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161 # assumes our pyinfra process is running on server_node
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162 files.put(
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163 src='/etc/rancher/k3s/k3s.yaml',
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164 dest='/etc/rancher/k3s/k3s.yaml', #
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165 user='root',
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166 group='drewp',
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167 mode='640')
267
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168 server.shell(
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169 f"kubectl config set-cluster default --server=https://{server_ip}:6443 --kubeconfig=/etc/rancher/k3s/k3s.yaml")
204
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170
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171
267
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172 make_cluster(server_ip="10.5.0.7",
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173 server_node='ditto',
287
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174 nodes=[
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175 'bang',
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176 'slash',
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177 'dash',
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178 'ws-printer',
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179 # 'gn-music',
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180 'li-drums',
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181 ],
267
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182 admin_from=['bang', 'slash', 'dash', 'ditto'],
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183 k3s_version='v1.29.1+k3s1')
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184
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185 # consider https://github.com/derailed/k9s/releases/download/v0.32.4/k9s_Linux_amd64.tar.gz