vuko | 6c678e3 | 2020-05-22 22:02:22 +0200 | [diff] [blame] | 1 | # this is libjsonnet library for kubernetes related things |
| 2 | local kube = import '../../../kube/kube.libsonnet'; |
| 3 | |
| 4 | { |
| 5 | local shells = self, |
| 6 | local cfg = shells.cfg, |
| 7 | |
| 8 | # namespace defining parameters used by other functions |
| 9 | # double colon "::" prevents it from appearing in output file |
| 10 | cfg:: { |
| 11 | namespace: "personal-vuko", |
| 12 | appName: "three-shell-system", |
| 13 | domain: "shells.vuko.pl", |
| 14 | |
| 15 | nginx_tag: "latest", |
| 16 | nginx_image: "nginxinc/nginx-unprivileged:stable-alpine", |
| 17 | |
| 18 | storageClassName: "waw-hdd-redundant-2", |
| 19 | |
| 20 | resources: { |
| 21 | requests: { |
| 22 | cpu: "25m", |
| 23 | memory: "50Mi", |
| 24 | }, |
| 25 | limits: { |
| 26 | cpu: "100m", |
| 27 | memory: "200Mi", |
| 28 | }, |
| 29 | }, |
| 30 | }, |
| 31 | |
| 32 | # kubernete namespace personal-${name} for personal usage |
| 33 | namespace: kube.Namespace(cfg.namespace), |
| 34 | |
| 35 | # function used for configuring components metatada |
| 36 | metadata(component):: { |
| 37 | namespace: cfg.namespace, |
| 38 | labels: { |
| 39 | "app.kubernetes.io/name": cfg.appName, |
| 40 | "app.kubernetes.io/managed-by": "kubecfg", |
| 41 | "app.kubernetes.io/component": component, |
| 42 | }, |
| 43 | }, |
| 44 | |
| 45 | # component - persistant (non volatile) memory |
| 46 | # https://kubernetes.io/docs/concepts/storage/persistent-volumes/ |
| 47 | dataVolume: kube.PersistentVolumeClaim("html-data") { |
| 48 | # override default PersistentVolumeClaim metatada with values defined |
| 49 | # in medadata function prevoiusly created |
| 50 | # "+" sign before means override |
| 51 | metadata+: shells.metadata("html-data"), |
| 52 | spec+: { |
| 53 | storageClassName: cfg.storageClassName, |
| 54 | # can be connected to multiple containers |
| 55 | accessModes: [ "ReadWriteMany" ], |
| 56 | resources: { |
| 57 | requests: { |
| 58 | # amount of storage space: 500Mb |
| 59 | storage: "500Mi", |
| 60 | }, |
| 61 | }, |
| 62 | }, |
| 63 | }, |
| 64 | |
| 65 | # deployment declares pods |
| 66 | # https://kubernetes.io/docs/concepts/workloads/controllers/deployment/ |
| 67 | deployment: kube.Deployment("shells") { |
| 68 | metadata+: shells.metadata("shells"), |
| 69 | spec+: { |
| 70 | replicas: 1, |
| 71 | template+: { |
| 72 | spec+: { |
| 73 | # names ending with _ have special meaning in this context |
| 74 | # this is specified in ../../../kube/kube.upstream.jsonnet |
| 75 | # volumes_ { key: { ... } } is converted to volumes [{ name: key, ... }] |
| 76 | volumes_: { |
| 77 | # sftp container host keys secrets saved to kubernetes semi-manually using create-secrets.py |
| 78 | # https://kubernetes.io/docs/concepts/configuration/secret/ |
| 79 | host_keys: { secret: { secretName: "shells-ssh-host-key-bd65mg4gbt" } }, |
| 80 | # sftp container authorized_keys saved to kubernetes using command: |
| 81 | # kubectl -n personal-vuko create secret generic shells-ssh-authorized-keys --from-file="authorized_keys=${HOME}/.ssh/id_ed25519.pub" |
| 82 | authorized_keys: { secret: { secretName: "shells-ssh-authorized-keys", defaultMode: 256 } }, |
| 83 | # to use created volume in deployment we need to claim it |
| 84 | html: kube.PersistentVolumeClaimVolume(shells.dataVolume), |
| 85 | }, |
| 86 | # here are containers defined |
| 87 | # when they are defined in one deployment |
| 88 | containers_: { |
| 89 | shells: kube.Container("nginx") { |
| 90 | image: cfg.nginx_image, |
| 91 | ports_: { |
| 92 | http: { containerPort: 80 }, |
| 93 | }, |
| 94 | resources: cfg.resources, |
| 95 | volumeMounts_: { |
| 96 | html: { mountPath: "/usr/share/nginx/html" }, |
| 97 | }, |
| 98 | }, |
| 99 | sftp: kube.Container("sftp") { |
| 100 | image: "registry.k0.hswaw.net/vuko/hs-shells-sftp:latest", |
| 101 | ports_: { |
| 102 | sftp: { containerPort: 2222 }, |
| 103 | }, |
| 104 | command: [ "/bin/start" ], |
| 105 | resources: cfg.resources, |
| 106 | securityContext: { |
| 107 | # specify uid of user running command |
| 108 | runAsUser: 1, |
| 109 | }, |
| 110 | volumeMounts_: { |
| 111 | # here volumes defined in volumes_ can be mounted |
| 112 | host_keys: { mountPath: "/etc/ssh/host" }, |
| 113 | authorized_keys: { mountPath: "/etc/ssh/auth" }, |
| 114 | html: { mountPath: "/data" }, |
| 115 | }, |
| 116 | }, |
| 117 | }, |
| 118 | }, |
| 119 | }, |
| 120 | }, |
| 121 | }, |
| 122 | |
| 123 | # defining a service of type LoadBancer gives you acces from internet |
| 124 | # run: kubectl -n personal-${user} get services to see ip address |
| 125 | svc: kube.Service("shells") { |
| 126 | metadata+: shells.metadata("shells"), |
| 127 | target_pod:: shells.deployment.spec.template, |
| 128 | spec+: { |
| 129 | ports: [ |
| 130 | { name: "http", port: 80, targetPort: 8080, protocol: "TCP" }, |
| 131 | { name: "sftp", port: 22, targetPort: 2222, protocol: "TCP" }, |
| 132 | ], |
| 133 | type: "LoadBalancer", |
| 134 | externalTrafficPolicy: "Local", |
| 135 | }, |
| 136 | }, |
| 137 | |
| 138 | # ingress creates VirtualHost on ingress.k0.hswaw.net forwaring http(s) |
| 139 | # requests to your domain to specified Pod/container |
| 140 | ingress: kube.Ingress("frontend") { |
| 141 | metadata+: shells.metadata("frontend") { |
| 142 | annotations+: { |
| 143 | "kubernetes.io/tls-acme": "true", |
| 144 | "certmanager.k8s.io/cluster-issuer": "letsencrypt-prod", |
| 145 | }, |
| 146 | }, |
| 147 | spec+: { |
| 148 | tls: [ |
| 149 | { hosts: [cfg.domain], secretName: "shells-frontend-tls"} |
| 150 | ], |
| 151 | rules: [ |
| 152 | { |
| 153 | host: cfg.domain, |
| 154 | http: { |
| 155 | paths: [ |
| 156 | { path: "/", backend: shells.svc.name_port }, |
| 157 | ], |
| 158 | }, |
| 159 | }, |
| 160 | ], |
| 161 | }, |
| 162 | }, |
| 163 | } |