1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
assert false;
{ current-host-name
, current-user-name
, lib
, stockholm
, StrictHostKeyChecking ? "yes"
}:
let out = {
inherit infest;
inherit init;
inherit nixos-install;
};
infest =
{ system ? current-host-name
, target ? system
}@args: let
config = get-config system;
in ''
#! /bin/sh
# krebs.infest
set -efu
${rootssh target ''
${builtins.readFile ./4lib/infest/prepare.sh}
${builtins.readFile ./4lib/infest/install-nix.sh}
''}
(${nixos-install args})
${rootssh target ''
${builtins.readFile ./4lib/infest/finalize.sh}
''}
'';
init =
{ system ? current-host-name
}@args: let
config = get-config system;
in ''
#! /bin/sh
# krebs.init
set -efu
system=${lib.shell.escape system}
secrets_dir=${config.krebs.build.source.dir.secrets.path}
key_type=ed25519
key_file=$secrets_dir/ssh.id_$key_type
key_comment=$system
if test -e "$key_file"; then
echo "Warning: privkey already exists: $key_file" >&2
else
ssh-keygen \
-C "$key_comment" \
-t "$key_type" \
-f "$key_file" \
-N ""
rm "$key_file.pub"
fi
pubkey=$(ssh-keygen -y -f "$key_file")
cat<<EOF
# put following into config.krebs.hosts.$system:
ssh.privkey.path = <secrets/ssh.$key_type>;
ssh.pubkey = $(echo $pubkey | jq -R .);
EOF
'';
nixos-install =
{ system ? current-host-name
, target ? system
}@args: let
in ''
#! /bin/sh
# krebs.nixos-install
(${populate (args // { root = "/mnt"; })})
${rootssh target ''
export PATH; PATH=/root/.nix-profile/bin:$PATH
src=$(type -p nixos-install)
cat_src() {
sed < "$src" "$(
{ sed < "$src" -n '
/^if ! test -e "\$mountPoint\/\$NIXOS_CONFIG/,/^fi$/=
/^nixpkgs=/=
/^NIX_PATH=/,/^$/{/./=}
# Disable: Copy the NixOS/Nixpkgs sources to the target as
# the initial contents of the NixOS channel.
/^srcs=/,/^ln -sfn /=
'
} | sed 's:$:s/^/#krebs#/:'
)"
}
# Location to insert `nix-install`
i=$(sed -n '/^echo "building the system configuration/=' "$src")
{
cat_src | sed -n "1,$i{p}"
cat ${doc (nix-install args)}
cat_src | sed -n "$i,\''${$i!p}"
} > nixos-install
chmod +x nixos-install
# Wrap inserted nix-install into chroot.
nix_env=$(cat_src | sed -n '
s:.*\(/nix/store/[a-z0-9]*-nix-[0-9.]\+/bin/nix-env\).*:\1:p;T;q
')
echo "nix-env is $nix_env" >&2
findpkg() {(
name=$1
path=$(find /nix/store \
-mindepth 1 -maxdepth 1 -type d -name '*-'"$name"'-*' \
| head -n 1 | sed s:^/mnt::)
if echo "$path" | grep .; then
echo "$name is $path" >&2
else
echo "Error: package not found: $name" >&2
exit 1
fi
)}
cacert=$(findpkg cacert)
coreutils=$(findpkg coreutils)
cp "$cacert"/etc/ssl/certs/ca-bundle.crt /mnt/root/SSL_CERT_FILE
env="$coreutils/bin/env SSL_CERT_FILE=/root/SSL_CERT_FILE"
sed -i '
s:^NIX_PATH=:chroot $mountPoint '"$env"' &:
s:^nix-env:'"$nix_env"':
' nixos-install
./nixos-install
''}
'';
doc = s:
let b = "EOF${builtins.hashString "sha256" s}"; in
''
<<\${b}
${s}
${b}
'';
get-config = system: let
config = stockholm.users.${current-user-name}.${system}.config
or (abort "unknown system: ${system}, user: ${current-user-name}");
in config;
nix-install =
{ system ? current-host-name
, target ? system
}:
let
config = get-config system;
nix-path =
lib.concatStringsSep ":"
(lib.mapAttrsToList (name: src: "${name}=${src.target-path}")
(config.krebs.build.source.dir //
config.krebs.build.source.git));
in ''
set -efu
NIX_PATH=${lib.shell.escape nix-path} \
nix-env \
--show-trace \
-f '<stockholm>' \
--argstr current-host-name ${lib.shell.escape current-host-name} \
--argstr current-user-name ${lib.shell.escape current-user-name} \
--profile ${lib.shell.escape config.krebs.build.profile} \
--set \
-A ${lib.escapeShellArg (lib.concatStringsSep "." [
"users"
config.krebs.build.user.name
config.krebs.build.host.name
"system"
])}
'';
rootssh = target: script:
let
flags = "-o StrictHostKeyChecking=${StrictHostKeyChecking}";
in
"ssh ${flags} root@${target} -T ${doc ''
set -efu
${script}
''}";
in out
|
