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Merge "personal/vuko/shells initial commit"
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9
personal/vuko/shells/README.rst
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9
personal/vuko/shells/README.rst
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Hosting for Hackerspace Three Shell System announcement. Currently uploading
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is performed using sftp.
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.. code::bash
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scp index.html shells@185.236.240.58:index.html
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TODO:
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* web interface for shells rotation
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* access for other members?
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26
personal/vuko/shells/create-secrets.py
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26
personal/vuko/shells/create-secrets.py
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#!/usr/bin/env python3
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""" generate ssh keys for shells SFTP container """
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from pathlib import Path
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from subprocess import run
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import json
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import tempfile
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with tempfile.TemporaryDirectory() as tmp:
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tmp = Path(tmp).absolute()
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keyfile = tmp.joinpath("ssh_host_ed25519_key")
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run(["ssh-keygen", "-f", keyfile, "-N", "", "-t", "ed25519"], check=True)
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# https://kubernetes.io/docs/concepts/configuration/secret/#generating-a-secret-from-files
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generator = {
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"secretGenerator": [
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{
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"name": "shells-ssh-host-key",
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"files": [
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str(f.relative_to(tmp))
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for f in [keyfile, keyfile.with_suffix(".pub")]
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],
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}
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]
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}
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tmp.joinpath("kustomization.yaml").write_text(json.dumps(generator))
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run(["kubectl", "-n", "personal-vuko", "apply", "-k", tmp], check=True)
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163
personal/vuko/shells/prod.jsonnet
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163
personal/vuko/shells/prod.jsonnet
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# this is libjsonnet library for kubernetes related things
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local kube = import '../../../kube/kube.libsonnet';
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{
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local shells = self,
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local cfg = shells.cfg,
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# namespace defining parameters used by other functions
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# double colon "::" prevents it from appearing in output file
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cfg:: {
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namespace: "personal-vuko",
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appName: "three-shell-system",
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domain: "shells.vuko.pl",
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nginx_tag: "latest",
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nginx_image: "nginxinc/nginx-unprivileged:stable-alpine",
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storageClassName: "waw-hdd-redundant-2",
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resources: {
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requests: {
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cpu: "25m",
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memory: "50Mi",
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},
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limits: {
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cpu: "100m",
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memory: "200Mi",
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},
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},
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},
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# kubernete namespace personal-${name} for personal usage
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namespace: kube.Namespace(cfg.namespace),
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# function used for configuring components metatada
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metadata(component):: {
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namespace: cfg.namespace,
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labels: {
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"app.kubernetes.io/name": cfg.appName,
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"app.kubernetes.io/managed-by": "kubecfg",
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"app.kubernetes.io/component": component,
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},
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},
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# component - persistant (non volatile) memory
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# https://kubernetes.io/docs/concepts/storage/persistent-volumes/
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dataVolume: kube.PersistentVolumeClaim("html-data") {
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# override default PersistentVolumeClaim metatada with values defined
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# in medadata function prevoiusly created
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# "+" sign before means override
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metadata+: shells.metadata("html-data"),
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spec+: {
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storageClassName: cfg.storageClassName,
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# can be connected to multiple containers
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accessModes: [ "ReadWriteMany" ],
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resources: {
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requests: {
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# amount of storage space: 500Mb
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storage: "500Mi",
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},
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},
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},
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},
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# deployment declares pods
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# https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
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deployment: kube.Deployment("shells") {
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metadata+: shells.metadata("shells"),
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spec+: {
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replicas: 1,
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template+: {
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spec+: {
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# names ending with _ have special meaning in this context
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# this is specified in ../../../kube/kube.upstream.jsonnet
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# volumes_ { key: { ... } } is converted to volumes [{ name: key, ... }]
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volumes_: {
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# sftp container host keys secrets saved to kubernetes semi-manually using create-secrets.py
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# https://kubernetes.io/docs/concepts/configuration/secret/
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host_keys: { secret: { secretName: "shells-ssh-host-key-bd65mg4gbt" } },
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# sftp container authorized_keys saved to kubernetes using command:
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# kubectl -n personal-vuko create secret generic shells-ssh-authorized-keys --from-file="authorized_keys=${HOME}/.ssh/id_ed25519.pub"
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authorized_keys: { secret: { secretName: "shells-ssh-authorized-keys", defaultMode: 256 } },
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# to use created volume in deployment we need to claim it
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html: kube.PersistentVolumeClaimVolume(shells.dataVolume),
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},
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# here are containers defined
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# when they are defined in one deployment
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containers_: {
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shells: kube.Container("nginx") {
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image: cfg.nginx_image,
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ports_: {
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http: { containerPort: 80 },
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},
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resources: cfg.resources,
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volumeMounts_: {
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html: { mountPath: "/usr/share/nginx/html" },
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},
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},
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sftp: kube.Container("sftp") {
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image: "registry.k0.hswaw.net/vuko/hs-shells-sftp:latest",
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ports_: {
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sftp: { containerPort: 2222 },
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},
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command: [ "/bin/start" ],
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resources: cfg.resources,
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securityContext: {
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# specify uid of user running command
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runAsUser: 1,
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},
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volumeMounts_: {
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# here volumes defined in volumes_ can be mounted
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host_keys: { mountPath: "/etc/ssh/host" },
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authorized_keys: { mountPath: "/etc/ssh/auth" },
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html: { mountPath: "/data" },
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},
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},
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},
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},
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},
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},
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},
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# defining a service of type LoadBancer gives you acces from internet
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# run: kubectl -n personal-${user} get services to see ip address
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svc: kube.Service("shells") {
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metadata+: shells.metadata("shells"),
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target_pod:: shells.deployment.spec.template,
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spec+: {
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ports: [
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{ name: "http", port: 80, targetPort: 8080, protocol: "TCP" },
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{ name: "sftp", port: 22, targetPort: 2222, protocol: "TCP" },
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],
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type: "LoadBalancer",
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externalTrafficPolicy: "Local",
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},
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},
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# ingress creates VirtualHost on ingress.k0.hswaw.net forwaring http(s)
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# requests to your domain to specified Pod/container
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ingress: kube.Ingress("frontend") {
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metadata+: shells.metadata("frontend") {
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annotations+: {
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"kubernetes.io/tls-acme": "true",
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"certmanager.k8s.io/cluster-issuer": "letsencrypt-prod",
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},
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},
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spec+: {
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tls: [
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{ hosts: [cfg.domain], secretName: "shells-frontend-tls"}
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],
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rules: [
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{
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host: cfg.domain,
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http: {
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paths: [
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{ path: "/", backend: shells.svc.name_port },
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],
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},
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},
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],
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},
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},
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}
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75
personal/vuko/shells/sftp.nix
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75
personal/vuko/shells/sftp.nix
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{ pkgs ? import <nixpkgs> {} }:
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let
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#dockertarpusher = pkgs.python37Packages.buildPythonPackage {
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# pname = "dockertarpusher";
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# version = "0.16";
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# src = pkgs.fetchFromGitHub {
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# owner = "Razikus";
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# repo = "dockerregistrypusher";
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# rev = "217894b79181a9a02ebc6744e0628777a0f89c36";
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# sha256 = "09cqzd9gz42xw30x1jp9mx056k25i20kjzzdg3bk78a4bis29kd4";
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# };
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# propagatedBuildInputs = with pkgs; [
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# python37Packages.requests
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# ];
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#};
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#hsregistry_push = import ./registrypush {};
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config = pkgs.runCommand "sshd_config" {} ''
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mkdir -p $out/etc/ssh/
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cp ${./sshd_config} $out/etc/ssh/sshd_config
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#cp ${./test_keys/test_host_key} $out/etc/ssh/ssh_host_ed25519_key
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#cp ${./test_keys/test_host_key.pub} $out/etc/ssh/ssh_host_ed25519_key.pub
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#cp ${./test_keys/authorized_keys} $out/etc/ssh/authorized_keys
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'';
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name = "vuko/hs-shells-sftp";
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base = pkgs.dockerTools.buildImage {
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name = "vuko/ssh-base";
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tag = "latest";
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contents = [pkgs.openssh pkgs.busybox];
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};
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image = pkgs.dockerTools.buildImage {
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inherit name;
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tag = "latest";
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fromImage = base;
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contents = [config];
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runAsRoot = ''
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#!${pkgs.runtimeShell}
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mkdir /data/
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#echo "root:x:0:0::/root:/bin/nologin" > /etc/passwd
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echo "shells:x:1:1::/data:/bin/sh" >> /etc/passwd
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mkdir -p /etc/ssh/host/
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mkdir -p /etc/ssh/auth/
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mkdir -m 700 /tmp
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chown 1:1 /tmp
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cat <<EOF > /bin/start
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#!/bin/sh
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cp /etc/ssh/auth/authorized_keys /tmp/authorized_keys
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/bin/sshd -D -e -f /etc/ssh/sshd_config
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EOF
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chmod +x /bin/start
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'';
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#https://serverfault.com/questions/344295/is-it-possible-to-run-sshd-as-a-normal-user
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config = {
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Cmd = [ "/bin/start" ];
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WorkingDir = "/";
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ExposedPorts = {
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"2222/tcp" = {};
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};
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};
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};
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push = pkgs.writeShellScriptBin "push" ''
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BASEDIR=$(realpath $(dirname ''${BASH_SOURCE}))
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docker load < "''${BASEDIR}/../images/sftp.tar.gz"
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docker tag ${name}:latest registry.k0.hswaw.net/${name}
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docker push registry.k0.hswaw.net/${name}
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#exec {hsregistry_push}/bin/hsregistry-push "$BASEDIR/../images/sftp.tar.gz" "$@"
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'';
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in pkgs.runCommand "hs-shells-sftp" {} ''
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mkdir $out
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mkdir -p $out/images $out/bin
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ln -s ${image} $out/images/sftp.tar.gz
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install ${push}/bin/push $out/bin/
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''
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17
personal/vuko/shells/sshd_config
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17
personal/vuko/shells/sshd_config
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Port 2222
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AddressFamily any
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ListenAddress 0.0.0.0
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#ListenAddress ::
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#UsePrivilegeSeparation no
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UsePAM no
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PermitEmptyPasswords no
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PasswordAuthentication no
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AuthorizedKeysFile /tmp/authorized_keys
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HostKey /etc/ssh/host/ssh_host_ed25519_key
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Subsystem sftp /libexec/sftp-server
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PidFile /tmp/sshd.pid
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#ForceCommand internal-sftp
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AllowTcpForwarding no
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X11Forwarding no
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PasswordAuthentication no
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