From 063fbc56fdcbb3f23480d566f23435934f25b949 Mon Sep 17 00:00:00 2001
From: Pim Kunis <pim@kunis.nl>
Date: Tue, 25 Apr 2023 21:59:11 +0200
Subject: [PATCH] revert back to push backups

---
 inventory/host_vars/lewis.yml           | 12 ++--
 inventory/hosts.yml                     |  2 +-
 lewis.yml                               | 83 ++++++++++++++++++++++++-
 requirements.yml                        |  3 +
 roles/borg/files/backup.timer           | 10 ---
 roles/borg/tasks/main.yml               | 47 --------------
 roles/borg/templates/backup.service.j2  |  6 --
 roles/borg/templates/backup.yml.j2      | 14 -----
 roles/common/tasks/main.yml             |  7 ---
 roles/system/files/ssh.conf             |  2 -
 roles/system/files/ssh_host_ed25519_key | 25 --------
 roles/system/files/ssh_user_ed25519_key | 25 --------
 roles/system/tasks/main.yml             | 59 ------------------
 sshd_user_certificates.conf             |  3 +
 14 files changed, 95 insertions(+), 203 deletions(-)
 create mode 100644 requirements.yml
 delete mode 100644 roles/borg/files/backup.timer
 delete mode 100644 roles/borg/tasks/main.yml
 delete mode 100644 roles/borg/templates/backup.service.j2
 delete mode 100644 roles/borg/templates/backup.yml.j2
 delete mode 100644 roles/common/tasks/main.yml
 delete mode 100644 roles/system/files/ssh.conf
 delete mode 100644 roles/system/files/ssh_host_ed25519_key
 delete mode 100644 roles/system/files/ssh_user_ed25519_key
 delete mode 100644 roles/system/tasks/main.yml
 create mode 100644 sshd_user_certificates.conf

diff --git a/inventory/host_vars/lewis.yml b/inventory/host_vars/lewis.yml
index bcceb9d..f79bf26 100644
--- a/inventory/host_vars/lewis.yml
+++ b/inventory/host_vars/lewis.yml
@@ -1,10 +1,14 @@
-borg_public_key: "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBTag7YToG5W+H2kEUz40kOH+7cs0Lp3owFFKkmHBiWM root@max"
-dataserver_public_key: "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJsLVptkoOwmxs6DnenN8u7Q1Tm/Psh0QdI6vjrTgb6D root@lewis"
-user_public_key: "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBRBrKmIKP5BFhLSdntatIgSC0R/D9EEZlak5Yt0DfUe root@lewis"
 kingston1tb_mount_point: "/mnt/kingston1TB"
 kingston1tb_uuid: "622a8d81-aa2f-460b-a563-c3cdb6285609"
-backup_location: "{{ kingston1tb_mount_point }}/atlas_backup"
 
 admin_public_keys:
   - "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINUZp4BCxf7uLa1QWonx/Crf8tYZ5MKIZ+EuaBa82LrV user@user-laptop"
   - "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOodpLr+FDRyKyHjucHizNLVFHZ5AQmE9GmxMnOsSoaw pimkunis@thinkpadpim"
+
+hyp_user_ca_public_key: "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHZreEhS/rMHfJB7IenEEfk38zCjmyce+X2AWxzU/N81 User Certificate Authority for *.hyp"
+
+backup_hosts:
+  - atlas
+
+apt_install_packages:
+  - borgbackup
diff --git a/inventory/hosts.yml b/inventory/hosts.yml
index a196063..b4a1808 100644
--- a/inventory/hosts.yml
+++ b/inventory/hosts.yml
@@ -4,4 +4,4 @@ all:
       hosts:
         lewis:
           ansible_user: root
-          ansible_host: lewis.lan
+          ansible_host: lewis.hyp
diff --git a/lewis.yml b/lewis.yml
index e5ab377..706755c 100644
--- a/lewis.yml
+++ b/lewis.yml
@@ -1,6 +1,83 @@
 - name: Setup homeserver
   hosts: dataserver
+
+  handlers:
+    - name: restart sshd
+      systemd:
+        name: sshd
+        state: restarted
+
+  tasks:
+    - name: Copy backup user principals file
+      copy:
+        dest: /etc/ssh/backup_principals
+        content: hypervisor
+
+    - name: Copy hyp user SSH CA public key
+      copy:
+        dest: /etc/ssh/hyp_user.pub
+        content: "{{ hyp_user_ca_public_key }}"
+
+    - name: Copy user certificate sshd config
+      copy:
+        src: "sshd_user_certificates.conf"
+        dest: /etc/ssh/sshd_config.d/user_certificates.conf
+      notify: restart sshd
+
+    - name: Ensure backup directory exists
+      file:
+        path: "{{ kingston1tb_mount_point }}/hosts"
+        state: directory
+
+    - name: Create backup respositories
+      command:
+        cmd: "borg init -e none {{ kingston1tb_mount_point }}/hosts/{{ item }}"
+        creates: "{{ kingston1tb_mount_point }}/hosts/{{ item }}"
+      with_items: "{{ backup_hosts }}"
+
+    - name: Create extra disk moint point
+      file:
+        path: "{{ kingston1tb_mount_point }}"
+        state: directory
+
+    - name: Mount extra disk
+      ansible.posix.mount:
+        path: "{{ kingston1tb_mount_point }}"
+        src: "UUID={{ kingston1tb_uuid }}"
+        fstype: ext4
+        passno: 1
+        state: present
+
+    - name: Generate host key pair
+      openssh_keypair:
+        path: /etc/ssh/ssh_host_ed25519_key
+        type: ed25519
+        comment: "{{ ansible_host }}"
+      register: host_key
+
+    - name: Check whether host certificate exists
+      stat:
+        path: /etc/ssh/ssh_host_ed25519_key-cert.pub
+      register: cert_stat
+
+    - name: Generate SSH host certificate
+      command:
+        cmd: "ssh -o ConnectTimeout=3 -o ConnectionAttempts=1 root@atlas.hyp '/root/ssh_ca/ssh_ca.sh host hyp_host \"{{ host_key.public_key }}\" {{ ansible_host }}'"
+      register: host_certificate
+      delegate_to: localhost
+      when: not cert_stat.stat.exists
+
+    - name: Place host certificate
+      copy:
+        dest: /etc/ssh/ssh_host_ed25519_key-cert.pub
+        content: "{{ host_certificate.stdout }}"
+        mode: 0644
+      when: not cert_stat.stat.exists
+
+    - name: Enable host certificate
+      copy:
+        dest: /etc/ssh/sshd_config.d/sshd_host_certificate.conf
+        content: "HostCertificate /etc/ssh/ssh_host_ed25519_key-cert.pub"
+
   roles:
-    - {role: 'common', tags: 'common'}
-    - {role: 'system', tags: 'system'}
-    - {role: 'borg', tags: 'borg'}
+    - apt
diff --git a/requirements.yml b/requirements.yml
new file mode 100644
index 0000000..43e6eca
--- /dev/null
+++ b/requirements.yml
@@ -0,0 +1,3 @@
+- name: apt
+  src: https://github.com/sunscrapers/ansible-role-apt.git
+  scm: git
diff --git a/roles/borg/files/backup.timer b/roles/borg/files/backup.timer
deleted file mode 100644
index 1f345f7..0000000
--- a/roles/borg/files/backup.timer
+++ /dev/null
@@ -1,10 +0,0 @@
-[Unit]
-Description=Backup data daily
-
-[Timer]
-OnCalendar=*-*-* 3:00:00
-Persistent=true
-RandomizedDelaySec=1h
-
-[Install]
-WantedBy=timers.target
diff --git a/roles/borg/tasks/main.yml b/roles/borg/tasks/main.yml
deleted file mode 100644
index 796c6e8..0000000
--- a/roles/borg/tasks/main.yml
+++ /dev/null
@@ -1,47 +0,0 @@
-- name: Install borg
-  apt:
-    pkg:
-      - borgbackup
-      - borgmatic
-- name: Copy borg backup config
-  template:
-    src: "{{ role_path }}/templates/backup.yml.j2"
-    dest: /root/backup.yml
-- name: Copy systemd service
-  template:
-    src: "{{ role_path }}/templates/backup.service.j2"
-    dest: "/etc/systemd/system/backup.service"
-  register: service
-- name: Copy systemd timer
-  copy:
-    src: "{{ role_path }}/files/backup.timer"
-    dest: "/etc/systemd/system/backup.timer"
-  register: timer
-- name: Enable timer
-  systemd:
-    name: backup.timer
-    enabled: true
-    state: started
-    daemon_reload: "{{ 'yes' if service.changed or timer.changed else 'no' }}"
-- name: Create extra disk moint point
-  file:
-    path: "{{ kingston1tb_mount_point }}"
-    state: directory
-- name: Mount extra disk
-  ansible.posix.mount:
-    path: "{{kingston1tb_mount_point }}"
-    src: "UUID={{ kingston1tb_uuid }}"
-    fstype: ext4
-    passno: 1
-    state: present
-- name: Install borg
-  apt:
-    name: borgbackup
-- name: Add Borg public key
-  authorized_key:
-    key: "{{ borg_public_key }}"
-    user: "{{ ansible_user_id }}"
-- name: Create Borg repository
-  command:
-    cmd: "borg init -e none {{ backup_location }}"
-    creates: "{{ backup_location }}"
diff --git a/roles/borg/templates/backup.service.j2 b/roles/borg/templates/backup.service.j2
deleted file mode 100644
index 8960c3f..0000000
--- a/roles/borg/templates/backup.service.j2
+++ /dev/null
@@ -1,6 +0,0 @@
-[Unit]
-Description=Backup data using borgmatic
-
-[Service]
-ExecStart=/usr/bin/borgmatic --config /root/backup.yml
-Type=oneshot
diff --git a/roles/borg/templates/backup.yml.j2 b/roles/borg/templates/backup.yml.j2
deleted file mode 100644
index 92b1bab..0000000
--- a/roles/borg/templates/backup.yml.j2
+++ /dev/null
@@ -1,14 +0,0 @@
-location:
-    source_directories:
-        - /mnt/atlas
-    repositories:
-        - {{ backup_location }}
-retention:
-    keep_daily: 7
-    keep_weekly: 4
-    keep_monthly: 6
-hooks:
-    before_everything:
-        - echo down | ssh backup-control@atlas.lan
-    after_everything:
-        - echo up | ssh backup-control@atlas.lan
diff --git a/roles/common/tasks/main.yml b/roles/common/tasks/main.yml
deleted file mode 100644
index 7a8f229..0000000
--- a/roles/common/tasks/main.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-- name: APT upgrade
-  apt:
-    autoremove: true
-    upgrade: yes
-    state: latest
-    update_cache: yes
-    cache_valid_time: 86400 # One day
diff --git a/roles/system/files/ssh.conf b/roles/system/files/ssh.conf
deleted file mode 100644
index 4a0bccc..0000000
--- a/roles/system/files/ssh.conf
+++ /dev/null
@@ -1,2 +0,0 @@
-CertificateFile /etc/ssh/ssh_user_ed25519_key-cert.pub
-IdentityFile /etc/ssh/ssh_user_ed25519_key
diff --git a/roles/system/files/ssh_host_ed25519_key b/roles/system/files/ssh_host_ed25519_key
deleted file mode 100644
index 1629458..0000000
--- a/roles/system/files/ssh_host_ed25519_key
+++ /dev/null
@@ -1,25 +0,0 @@
-$ANSIBLE_VAULT;1.1;AES256
-38633038656332643033396338303864343332636434633331366266383235316235313236646361
-6634313931303637616535373966316165656564366437330a393465356237626631303063363061
-62323737343635316139636664663937333233323737376238656566633037613938383737306132
-6237633230623962320a643433323532646261366532346234653332323336653162366433626465
-31386461393535303730333865356364646137386634643630353831383039353763396536313439
-30333335623364306166346232303862633636633066323062313531363234396362653232316261
-36666132623030323332623334323632636639646239363032626364646334643461346662616366
-39656266643937663531656137353031353130366238326535383261333539353439353566313537
-38353632353039643530613766313033313063333331333733613939383731663262623766626266
-64363061306166353633333634363332633461346538316661666364626639366132356434343631
-61373432633863643237386435386633366161393934646562343261386335353638353033343932
-62393633366163613064393966663830646237613265396462376238396639363566363865303861
-36343666326632626166323430303137323236346137346131623636653236353061343633383437
-61396534636166353038626162376335363137636164616631646261366332303135306237356432
-61626261656332666536343039316333303431653931666233363366613166663266663130656633
-39316363326532653665626136393135373863383234326638303466353930653038303433643536
-30666237363230306634333162396562623034386232666465343631306433373764626634613635
-63343965623163356536626162613863373033396565366361353538323933656165653932653937
-34666538353139636366333765363733336134396566613134303530633666326165306131353535
-33653133663166333964326330366530643730363861626261666366383334613661303762636663
-34376531343732346630643466616638323537633665373333346162306361393836326533636630
-61656335306337643930613662613832626530653630343566643661356666313331316438366538
-37333166636639363838303665626137643731626338356662656338393335343239376635303633
-35663237653238313133
diff --git a/roles/system/files/ssh_user_ed25519_key b/roles/system/files/ssh_user_ed25519_key
deleted file mode 100644
index 97b033f..0000000
--- a/roles/system/files/ssh_user_ed25519_key
+++ /dev/null
@@ -1,25 +0,0 @@
-$ANSIBLE_VAULT;1.1;AES256
-35346438336463383831313235653538373964643631303961373865643332623636383161333934
-3531363564313239623935343032376535333962336336350a666439303639363735626562323530
-39613366343331643331663434303531613230373934376537646665633630356462333932613537
-3465383636323934300a343264636565623166646266313764643262343532376336333763363662
-30623133303436373936323534366335663439626633313138366565303037323034613164646663
-31366366346561623039633035373638636464626237353566376666643039626334633863626565
-66356538326464363465623035396534663033646336393265326339346363376666396565346130
-66313634373931323738613863653066313034373361646530666561633463626536633963613236
-31616561316366633865383336363832663066343666356437616332376565326630316538663236
-65383234643439633737336639306232383862366230316262353639313833393138643464393734
-61313463323961623264386334666462623039663138326434643339633165393533386665393839
-34643762643864316331343562366139343432313332356232386139663564323338633139363930
-61346139346430643966346363393331616264396133613362393066363039303164623730356536
-35313138613536626665393239663532663061636433316232393839323732393635316634376464
-39313439656131643436393830356662383537353730373132346639366636613830616562613164
-65623333663763653364616638663833333732356238303130626161653139646563633433353865
-64346235616331363338303265396437623264353066646439643264646665343962373237376131
-30326564623264336365653666616331616138356235323961323134373265646434643065666661
-63616534333631323132663532623135393632333236613162623932316261316165616331396261
-66383862303763313032653565323934303366313765326330303032353937386434656134336433
-30616531323762343539666331336132313530316637393564643530303135366263633531393334
-30346632383139333263326265356133316435636663613130626566333730623739653936366138
-33663165616336363361323631643331346238333635623135623364663234366666393034663132
-64616234633735636164
diff --git a/roles/system/tasks/main.yml b/roles/system/tasks/main.yml
deleted file mode 100644
index fcbb58d..0000000
--- a/roles/system/tasks/main.yml
+++ /dev/null
@@ -1,59 +0,0 @@
-- name: Install sshfs
-  apt:
-    name: sshfs
-- name: Add admins' authorized keys
-  authorized_key:
-    key: "{{ item }}"
-    user: "{{ ansible_user_id }}"
-  loop: "{{ admin_public_keys }}"
-- name: Copy host public key
-  copy:
-    dest: "/etc/ssh/ssh_host_ed25519_key.pub"
-    content: "{{ dataserver_public_key }}"
-    mode: 0644
-- name: Copy host private key
-  copy:
-    src: "{{ role_path }}/files/ssh_host_ed25519_key"
-    dest: "/etc/ssh/ssh_host_ed25519_key"
-    mode: 0600
-- name: Copy user public key
-  copy:
-    dest: "/etc/ssh/ssh_user_ed25519_key.pub"
-    content: "{{ user_public_key }}"
-    mode: 0644
-- name: Copy user private key
-  copy:
-    src: "{{ role_path }}/files/ssh_user_ed25519_key"
-    dest: "/etc/ssh/ssh_user_ed25519_key"
-    mode: 0600
-- name: Copy ssh config
-  copy:
-    src: "{{ role_path }}/files/ssh.conf"
-    dest: "/etc/ssh/ssh_config.d/custom.conf"
-- name: Check certificate existance
-  stat:
-    path: "/etc/ssh/ssh_user_ed25519_key-cert.pub"
-  register: cert_stat
-- name: Generate user certificate
-  command:
-    cmd: "ssh -o ConnectTimeout=3 -o ConnectionAttempts=1 root@atlas.lan '/root/ssh_ca/ssh_ca.sh user \"{{ user_public_key }}\" lewis.lan \"backup\"'"
-  register: cert
-  delegate_to: localhost
-  when: not cert_stat.stat.exists
-- name: Place user certificate
-  copy:
-    dest: "/etc/ssh/ssh_user_ed25519_key-cert.pub"
-    content: "{{ cert.stdout }}"
-    mode: 0600
-  when: not cert_stat.stat.exists
-- name: Create point mount for atlas data
-  file:
-    path: /mnt/atlas
-    state: directory
-- name: Mount atlas data
-  mount:
-    src: "backup-share@atlas.lan:"
-    path: "/mnt/atlas"
-    state: mounted
-    fstype: fuse.sshfs
-    opts: "x-systemd.automount,_netdev,idmap=user,allow_other,reconnect,ro,ServerAliveInterval=15,ServerAliveCountMax=3"
diff --git a/sshd_user_certificates.conf b/sshd_user_certificates.conf
new file mode 100644
index 0000000..b4b81cc
--- /dev/null
+++ b/sshd_user_certificates.conf
@@ -0,0 +1,3 @@
+Match User root
+	TrustedUserCAKeys /etc/ssh/hyp_user.pub
+	AuthorizedPrincipalsFile /etc/ssh/backup_principals