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annotate kube.py @ 220:416aa647efd9

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registry hostname, add garage pi back to k8s
author drewp@bigasterisk.com
date Thu, 24 Aug 2023 12:43:14 -0700
parents ad6e997fd323
children 9dfb0916e850
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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 = 'v2.6.0'
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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 files.download(
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17 src=f'https://github.com/rancher/k3s/releases/download/{k3s_version}/{tail}',
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18 dest='/usr/local/bin/k3s',
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19 user='root',
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20 group='root',
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21 mode='755',
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22 cache_time=43000,
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23 #force=True, # to get a new version
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24 )
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27 def install_skaffold():
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28 files.download(src=f'https://storage.googleapis.com/skaffold/releases/{skaffold_version}/skaffold-linux-amd64',
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29 dest='/usr/local/bin/skaffold',
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30 user='root',
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31 group='root',
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32 mode='755',
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33 cache_time=1000)
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34 # one time; writes to $HOME
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35 server.shell("skaffold config set --global insecure-registries reg:5000")
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38 def pi_cgroup_setup():
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39 old_cmdline = host.get_fact(FindInFile, path='/boot/cmdline.txt', pattern=r'.*')[0]
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40 if 'cgroup' not in old_cmdline:
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41 cmdline = old_cmdline + ' cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
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42 files.line(path='/boot/cmdline.txt', line='.*', replace=cmdline)
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43 # pi needs reboot now
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46 def host_prep():
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47 server.sysctl(key='net.ipv4.ip_forward', value="1", persist=True)
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48 server.sysctl(key='net.ipv6.conf.all.forwarding', value="1", persist=True)
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49 server.sysctl(key='fs.inotify.max_user_instances', value='8192', persist=True)
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50 server.sysctl(key='fs.inotify.max_user_watches', value='524288', persist=True)
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51
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52 # https://sysctl-explorer.net/net/ipv4/rp_filter/
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53 none, strict, loose = 0, 1, 2
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54 server.sysctl(key='net.ipv4.conf.default.rp_filter', value=loose, persist=True)
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55
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56 if is_pi:
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57 pi_cgroup_setup()
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58
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59 # don't try to get aufs-dkms on rpi-- https://github.com/docker/for-linux/issues/709
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60 def podman_insecure_registry(reg):
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61 files.template(src='templates/kube/podman_registries.conf.j2', dest='/etc/containers/registries.conf.d/bang.conf', reg=reg)
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62
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63 def config_and_run_service(k3s_version, server_node, server_ip):
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64 download_k3s(k3s_version)
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65 service_name = 'k3s.service' if host.name == server_node else 'k3s-node.service'
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66 role = 'server' if host.name == server_node else 'agent'
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67 which_conf = 'config-server.yaml.j2' if host.name == server_node else 'config-agent.yaml.j2'
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68
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69 # /var/lib/rancher/k3s/server/node-token is the source of the string in secrets/k3s_token,
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70 # so this presumes a previous run
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71 if host.name == server_node:
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72 token = "ununsed"
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73 else:
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74 if not os.path.exists('/var/lib/rancher/k3s/server/node-token'):
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75 print("first pass is for server only- skipping other nodes")
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76 return
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77 token = open('/var/lib/rancher/k3s/server/node-token', 'rt').read().strip()
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78 files.template(
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79 src=f'templates/kube/{which_conf}',
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80 dest='/etc/k3s_config.yaml',
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81 server_ip=server_ip,
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82 token=token,
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83 wg_ip=host.host_data['wireguard_address'],
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84 )
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85 files.template(
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86 src='templates/kube/k3s.service.j2',
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87 dest=f'/etc/systemd/system/{service_name}',
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88 role=role,
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89 )
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90 systemd.service(service=service_name, daemon_reload=True, enabled=True, restarted=True)
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92
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93 def make_cluster(
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94 server_ip = "10.5.0.1",
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95 server_node = 'bang',
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96 nodes = ['slash', 'dash', 'ditto'],
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97 admin_from = ['bang', 'slash', 'dash', 'ditto'],
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98 # https://github.com/k3s-io/k3s/releases
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99 # 1.23.6 per https://github.com/cilium/cilium/issues/20331
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100 k3s_version = 'v1.24.3+k3s1',
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101 ):
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102 if not is_pi:
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103 podman_insecure_registry(reg='reg:5000')
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104
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105 if host.name in nodes + [server_node]:
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106 host_prep()
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107 files.directory(path='/etc/rancher/k3s')
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108
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109 # docs: https://rancher.com/docs/k3s/latest/en/installation/private-registry/
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110 # user confusions: https://github.com/rancher/k3s/issues/1802
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111 files.template(src='templates/kube/registries.yaml.j2', dest='/etc/rancher/k3s/registries.yaml', reg='reg:5000')
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112 # 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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113 config_and_run_service(k3s_version, server_node, server_ip)
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114
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115 if host.name in admin_from:
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116 files.directory(path='/etc/rancher/k3s')
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117 install_skaffold()
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118 files.link(path='/usr/local/bin/kubectl', target='/usr/local/bin/k3s')
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119 files.directory(path='/home/drewp/.kube', user='drewp', group='drewp')
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120
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121 # assumes our pyinfra process is running on server_node
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122 files.put(
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123 src='/etc/rancher/k3s/k3s.yaml',
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124 dest='/etc/rancher/k3s/k3s.yaml', #
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125 user='root',
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126 group='drewp',
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127 mode='640')
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128 server.shell(f"kubectl config set-cluster default --server=https://{server_ip}:6443 --kubeconfig=/etc/rancher/k3s/k3s.yaml")
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129
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130
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131 make_cluster( server_ip = "10.5.0.1", server_node = 'bang', nodes = ['slash', 'dash', 'ditto', 'garage'], admin_from = ['bang', 'slash', 'dash', 'ditto'], k3s_version = 'v1.24.3+k3s1')
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132 #make_cluster( server_ip = "10.5.0.7", server_node = 'ditto', nodes = ['slash', 'dash', 'bang'], admin_from = ['bang', 'slash', 'dash', 'ditto'], k3s_version = 'v1.25.11+k3s1')