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nixos/gitlab: Add support for storing secrets in files

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Add support for storing secrets in files outside the nix store, since
files in the nix store are world-readable and secrets therefore can't
be stored safely there.

The old string options are kept, since they can potentially be handy
for testing purposes, but their descriptions now state that they
shouldn't be used in production. The manual section is updated to use
the file options rather than the string options and the tests now test
both.
This commit is contained in:
talyz 2019-07-31 18:09:27 +02:00
parent 7648b4f8ba
commit cbdf94c0f3
3 changed files with 159 additions and 124 deletions
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185
nixos/modules/services/misc/gitlab.nix
View file

@ -19,7 +19,6 @@ let
adapter = "postgresql";
database = cfg.databaseName;
host = cfg.databaseHost;
password = cfg.databasePassword;
username = cfg.databaseUsername;
encoding = "utf8";
pool = cfg.databasePool;
@ -66,13 +65,6 @@ let
redisConfig.production.url = "redis://localhost:6379/";
secretsConfig.production = {
secret_key_base = cfg.secrets.secret;
otp_key_base = cfg.secrets.otp;
db_key_base = cfg.secrets.db;
openid_connect_signing_key = cfg.secrets.jws;
};
gitlabConfig = {
# These are the default settings from config/gitlab.example.yml
production = flip recursiveUpdate cfg.extraConfig {
@ -180,7 +172,7 @@ let
address: "${cfg.smtp.address}",
port: ${toString cfg.smtp.port},
${optionalString (cfg.smtp.username != null) ''user_name: "${cfg.smtp.username}",''}
${optionalString (cfg.smtp.password != null) ''password: "${cfg.smtp.password}",''}
${optionalString (cfg.smtp.passwordFile != null) ''password: "@smtpPassword@",''}
domain: "${cfg.smtp.domain}",
${optionalString (cfg.smtp.authentication != null) "authentication: :${cfg.smtp.authentication},"}
enable_starttls_auto: ${toString cfg.smtp.enableStartTLSAuto},
@ -249,9 +241,15 @@ in {
description = "Gitlab database hostname.";
};
databasePassword = mkOption {
type = types.str;
description = "Gitlab database user password.";
databasePasswordFile = mkOption {
type = with types; nullOr path;
default = null;
description = ''
File containing the Gitlab database user password.
This should be a string, not a nix path, since nix paths are
copied into the world-readable nix store.
'';
};
databaseName = mkOption {
@ -339,10 +337,15 @@ in {
'';
};
initialRootPassword = mkOption {
type = types.str;
initialRootPasswordFile = mkOption {
type = with types; nullOr path;
default = null;
description = ''
Initial password of the root account if this is a new install.
File containing the initial password of the root account if
this is a new install.
This should be a string, not a nix path, since nix paths are
copied into the world-readable nix store.
'';
};
@ -366,15 +369,20 @@ in {
};
username = mkOption {
type = types.nullOr types.str;
type = with types; nullOr str;
default = null;
description = "Username of the SMTP server for Gitlab.";
};
password = mkOption {
type = types.nullOr types.str;
passwordFile = mkOption {
type = types.nullOr types.path;
default = null;
description = "Password of the SMTP server for Gitlab.";
description = ''
File containing the password of the SMTP server for Gitlab.
This should be a string, not a nix path, since nix paths
are copied into the world-readable nix store.
'';
};
domain = mkOption {
@ -384,7 +392,7 @@ in {
};
authentication = mkOption {
type = types.nullOr types.str;
type = with types; nullOr str;
default = null;
description = "Authentitcation type to use, see http://api.rubyonrails.org/classes/ActionMailer/Base.html";
};
@ -402,52 +410,69 @@ in {
};
};
secrets.secret = mkOption {
type = types.str;
secrets.secretFile = mkOption {
type = with types; nullOr path;
default = null;
description = ''
The secret is used to encrypt variables in the DB. If
you change or lose this key you will be unable to access variables
stored in database.
A file containing the secret used to encrypt variables in
the DB. If you change or lose this key you will be unable to
access variables stored in database.
Make sure the secret is at least 30 characters and all random,
no regular words or you'll be exposed to dictionary attacks.
This should be a string, not a nix path, since nix paths are
copied into the world-readable nix store.
'';
};
secrets.db = mkOption {
type = types.str;
secrets.dbFile = mkOption {
type = with types; nullOr path;
default = null;
description = ''
The secret is used to encrypt variables in the DB. If
you change or lose this key you will be unable to access variables
stored in database.
A file containing the secret used to encrypt variables in
the DB. If you change or lose this key you will be unable to
access variables stored in database.
Make sure the secret is at least 30 characters and all random,
no regular words or you'll be exposed to dictionary attacks.
This should be a string, not a nix path, since nix paths are
copied into the world-readable nix store.
'';
};
secrets.otp = mkOption {
type = types.str;
secrets.otpFile = mkOption {
type = with types; nullOr path;
default = null;
description = ''
The secret is used to encrypt secrets for OTP tokens. If
you change or lose this key, users which have 2FA enabled for login
won't be able to login anymore.
A file containing the secret used to encrypt secrets for OTP
tokens. If you change or lose this key, users which have 2FA
enabled for login won't be able to login anymore.
Make sure the secret is at least 30 characters and all random,
no regular words or you'll be exposed to dictionary attacks.
This should be a string, not a nix path, since nix paths are
copied into the world-readable nix store.
'';
};
secrets.jws = mkOption {
type = types.str;
secrets.jwsFile = mkOption {
type = with types; nullOr path;
default = null;
description = ''
The secret is used to encrypt session keys. If you change or lose
this key, users will be disconnected.
A file containing the secret used to encrypt session
keys. If you change or lose this key, users will be
disconnected.
Make sure the secret is an RSA private key in PEM format. You can
generate one with
openssl genrsa 2048
This should be a string, not a nix path, since nix paths are
copied into the world-readable nix store.
'';
};
@ -471,6 +496,33 @@ in {
config = mkIf cfg.enable {
assertions = [
{
assertion = cfg.initialRootPasswordFile != null;
message = "services.gitlab.initialRootPasswordFile must be set!";
}
{
assertion = cfg.databasePasswordFile != null;
message = "services.gitlab.databasePasswordFile must be set!";
}
{
assertion = cfg.secrets.secretFile != null;
message = "services.gitlab.secrets.secretFile must be set!";
}
{
assertion = cfg.secrets.dbFile != null;
message = "services.gitlab.secrets.dbFile must be set!";
}
{
assertion = cfg.secrets.otpFile != null;
message = "services.gitlab.secrets.otpFile must be set!";
}
{
assertion = cfg.secrets.jwsFile != null;
message = "services.gitlab.secrets.jwsFile must be set!";
}
];
environment.systemPackages = [ pkgs.git gitlab-rake gitlab-rails cfg.packages.gitlab-shell ];
# Redis is required for the sidekiq queue runner.
@ -529,13 +581,9 @@ in {
"L+ /run/gitlab/shell-config.yml - - - - ${pkgs.writeText "config.yml" (builtins.toJSON gitlabShellConfig)}"
"L+ ${cfg.statePath}/config/gitlab.yml - - - - ${pkgs.writeText "gitlab.yml" (builtins.toJSON gitlabConfig)}"
"L+ ${cfg.statePath}/config/database.yml - - - - ${pkgs.writeText "database.yml" (builtins.toJSON databaseConfig)}"
"L+ ${cfg.statePath}/config/secrets.yml - - - - ${pkgs.writeText "secrets.yml" (builtins.toJSON secretsConfig)}"
"L+ ${cfg.statePath}/config/unicorn.rb - - - - ${./defaultUnicornConfig.rb}"
"L+ ${cfg.statePath}/config/initializers/extra-gitlab.rb - - - - ${extraGitlabRb}"
] ++ optional cfg.smtp.enable
"L+ ${cfg.statePath}/config/initializers/smtp_settings.rb - - - - ${smtpSettings}" ;
];
systemd.services.gitlab-sidekiq = {
after = [ "network.target" "redis.service" "gitlab.service" ];
@ -632,13 +680,53 @@ in {
${pkgs.sudo}/bin/sudo -u ${cfg.user} cp -rf --no-preserve=mode ${cfg.packages.gitlab}/share/gitlab/config.dist/* ${cfg.statePath}/config
${pkgs.sudo}/bin/sudo -u ${cfg.user} cp -rf --no-preserve=mode ${cfg.packages.gitlab}/share/gitlab/db/* ${cfg.statePath}/db
${pkgs.openssl}/bin/openssl rand -hex 32 > ${cfg.statePath}/gitlab_shell_secret
${pkgs.sudo}/bin/sudo -u ${cfg.user} ${cfg.packages.gitlab-shell}/bin/install
${optionalString cfg.smtp.enable ''
install -o ${cfg.user} -g ${cfg.group} -m u=rw ${smtpSettings} ${cfg.statePath}/config/initializers/smtp_settings.rb
${optionalString (cfg.smtp.passwordFile != null) ''
smtp_password=$(<'${cfg.smtp.passwordFile}')
${pkgs.replace}/bin/replace-literal -e '@smtpPassword@' "$smtp_password" '${cfg.statePath}/config/initializers/smtp_settings.rb'
''}
''}
(
umask u=rwx,g=,o=
${pkgs.openssl}/bin/openssl rand -hex 32 > ${cfg.statePath}/gitlab_shell_secret
if [[ -h '${cfg.statePath}/config/secrets.yml' ]]; then
rm '${cfg.statePath}/config/secrets.yml'
fi
export secret="$(<'${cfg.secrets.secretFile}')"
export db="$(<'${cfg.secrets.dbFile}')"
export otp="$(<'${cfg.secrets.otpFile}')"
export jws="$(<'${cfg.secrets.jwsFile}')"
${pkgs.jq}/bin/jq -n '{production: {secret_key_base: $ENV.secret,
otp_key_base: $ENV.db,
db_key_base: $ENV.otp,
openid_connect_signing_key: $ENV.jws}}' \
> '${cfg.statePath}/config/secrets.yml'
chown ${cfg.user}:${cfg.group} '${cfg.statePath}/config/secrets.yml' '${cfg.statePath}/gitlab_shell_secret'
)
export db_password="$(<'${cfg.databasePasswordFile}')"
if [[ -z "$db_password" ]]; then
>&2 echo "Database password was an empty string!"
exit 1
fi
${pkgs.jq}/bin/jq <${pkgs.writeText "database.yml" (builtins.toJSON databaseConfig)} \
'.production.password = $ENV.db_password' \
>'${cfg.statePath}/config/database.yml'
chown ${cfg.user}:${cfg.group} '${cfg.statePath}/config/database.yml'
if ! test -e "${cfg.statePath}/db-created"; then
if [ "${cfg.databaseHost}" = "127.0.0.1" ]; then
${pkgs.sudo}/bin/sudo -u ${pgSuperUser} psql postgres -c "CREATE ROLE ${cfg.databaseUsername} WITH LOGIN NOCREATEDB NOCREATEROLE ENCRYPTED PASSWORD '${cfg.databasePassword}'"
${pkgs.sudo}/bin/sudo -u ${pgSuperUser} psql postgres -c "CREATE ROLE ${cfg.databaseUsername} WITH LOGIN NOCREATEDB NOCREATEROLE ENCRYPTED PASSWORD '$db_password'"
${pkgs.sudo}/bin/sudo -u ${pgSuperUser} ${config.services.postgresql.package}/bin/createdb --owner ${cfg.databaseUsername} ${cfg.databaseName}
# enable required pg_trgm extension for gitlab
@ -654,8 +742,9 @@ in {
${pkgs.sudo}/bin/sudo -u ${cfg.user} -H ${gitlab-rake}/bin/gitlab-rake db:migrate
if ! test -e "${cfg.statePath}/db-seeded"; then
initial_root_password="$(<'${cfg.initialRootPasswordFile}')"
${pkgs.sudo}/bin/sudo -u ${cfg.user} ${gitlab-rake}/bin/gitlab-rake db:seed_fu \
GITLAB_ROOT_PASSWORD='${cfg.initialRootPassword}' GITLAB_ROOT_EMAIL='${cfg.initialRootEmail}'
GITLAB_ROOT_PASSWORD="$initial_root_password" GITLAB_ROOT_EMAIL='${cfg.initialRootEmail}'
${pkgs.sudo}/bin/sudo -u ${cfg.user} touch "${cfg.statePath}/db-seeded"
fi

56
nixos/modules/services/misc/gitlab.xml
View file

@ -54,8 +54,8 @@
<programlisting>
services.gitlab = {
<link linkend="opt-services.gitlab.enable">enable</link> = true;
<link linkend="opt-services.gitlab.databasePassword">databasePassword</link> = "eXaMpl3";
<link linkend="opt-services.gitlab.initialRootPassword">initialRootPassword</link> = "UseNixOS!";
<link linkend="opt-services.gitlab.databasePasswordFile">databasePasswordFile</link> = "/var/keys/gitlab/db_password";
<link linkend="opt-services.gitlab.initialRootPasswordFile">initialRootPasswordFile</link> = "/var/keys/gitlab/root_password";
<link linkend="opt-services.gitlab.https">https</link> = true;
<link linkend="opt-services.gitlab.host">host</link> = "git.example.com";
<link linkend="opt-services.gitlab.port">port</link> = 443;
@ -67,38 +67,10 @@ services.gitlab = {
<link linkend="opt-services.gitlab.smtp.port">port</link> = 25;
};
secrets = {
<link linkend="opt-services.gitlab.secrets.db">db</link> = "uPgq1gtwwHiatiuE0YHqbGa5lEIXH7fMsvuTNgdzJi8P0Dg12gibTzBQbq5LT7PNzcc3BP9P1snHVnduqtGF43PgrQtU7XL93ts6gqe9CBNhjtaqUwutQUDkygP5NrV6";
<link linkend="opt-services.gitlab.secrets.secret">secret</link> = "devzJ0Tz0POiDBlrpWmcsjjrLaltyiAdS8TtgT9YNBOoUcDsfppiY3IXZjMVtKgXrFImIennFGOpPN8IkP8ATXpRgDD5rxVnKuTTwYQaci2NtaV1XxOQGjdIE50VGsR3";
<link linkend="opt-services.gitlab.secrets.otp">otp</link> = "e1GATJVuS2sUh7jxiPzZPre4qtzGGaS22FR50Xs1TerRVdgI3CBVUi5XYtQ38W4xFeS4mDqi5cQjExE838iViSzCdcG19XSL6qNsfokQP9JugwiftmhmCadtsnHErBMI";
<link linkend="opt-services.gitlab.secrets.jws">jws</link> = ''
-----BEGIN RSA PRIVATE KEY-----
MIIEpAIBAAKCAQEArrtx4oHKwXoqUbMNqnHgAklnnuDon3XG5LJB35yPsXKv/8GK
ke92wkI+s1Xkvsp8tg9BIY/7c6YK4SR07EWL+dB5qwctsWR2Q8z+/BKmTx9D99pm
hnsjuNIXTF7BXrx3RX6BxZpH5Vzzh9nCwWKT/JCFqtwH7afNGGL7aMf+hdaiUg/Q
SD05yRObioiO4iXDolsJOhrnbZvlzVHl1ZYxFJv0H6/Snc0BBA9Fl/3uj6ANpbjP
eXF1SnJCqT87bj46r5NdVauzaRxAsIfqHroHK4UZ98X5LjGQFGvSqTvyjPBS4I1i
s7VJU28ObuutHxIxSlH0ibn4HZqWmKWlTS652wIDAQABAoIBAGtPcUTTw2sJlR3x
4k2wfAvLexkHNbZhBdKEa5JiO5mWPuLKwUiZEY2CU7Gd6csG3oqNWcm7/IjtC7dz
xV8p4yp8T4yq7vQIJ93B80NqTLtBD2QTvG2RCMJEPMzJUObWxkVmyVpLQyZo7KOd
KE/OM+aj94OUeEYLjRkSCScz1Gvq/qFG/nAy7KPCmN9JDHuhX26WHo2Rr1OnPNT/
7diph0bB9F3b8gjjNTqXDrpdAqVOgR/PsjEBz6DMY+bdyMIn87q2yfmMexxRofN6
LulpzSaa6Yup8N8H6PzVO6KAkQuf1aQRj0sMwGk1IZEnj6I0KbuHIZkw21Nc6sf2
ESFySDECgYEA1PnCNn5tmLnwe62Ttmrzl20zIS3Me1gUVJ1NTfr6+ai0I9iMYU21
5czuAjJPm9JKQF2vY8UAaCj2ZoObtHa/anb3xsCd8NXoM3iJq5JDoXI1ldz3Y+ad
U/bZUg1DLRvAniTuXmw9iOTwTwPxlDIGq5k+wG2Xmi1lk7zH8ezr9BMCgYEA0gfk
EhgcmPH8Z5cU3YYwOdt6HSJOM0OyN4k/5gnkv+HYVoJTj02gkrJmLr+mi1ugKj46
7huYO9TVnrKP21tmbaSv1dp5hS3letVRIxSloEtVGXmmdvJvBRzDWos+G+KcvADi
fFCz6w8v9NmO40CB7y/3SxTmSiSxDQeoi9LhDBkCgYEAsPgMWm25sfOnkY2NNUIv
wT8bAlHlHQT2d8zx5H9NttBpR3P0ShJhuF8N0sNthSQ7ULrIN5YGHYcUH+DyLAWU
TuomP3/kfa+xL7vUYb269tdJEYs4AkoppxBySoz8qenqpz422D0G8M6TpIS5Y5Qi
GMrQ6uLl21YnlpiCaFOfSQMCgYEAmZxj1kgEQmhZrnn1LL/D7czz1vMMNrpAUhXz
wg9iWmSXkU3oR1sDIceQrIhHCo2M6thwyU0tXjUft93pEQocM/zLDaGoVxtmRxxV
J08mg8IVD3jFoyFUyWxsBIDqgAKRl38eJsXvkO+ep3mm49Z+Ma3nM+apN3j2dQ0w
3HLzXaECgYBFLMEAboVFwi5+MZjGvqtpg2PVTisfuJy2eYnPwHs+AXUgi/xRNFjI
YHEa7UBPb5TEPSzWImQpETi2P5ywcUYL1EbN/nqPWmjFnat8wVmJtV4sUpJhubF4
Vqm9LxIWc1uQ1q1HDCejRIxIN3aSH+wgRS3Kcj8kCTIoXd1aERb04g==
-----END RSA PRIVATE KEY-----
'';
<link linkend="opt-services.gitlab.secrets.dbFile">dbFile</link> = "/var/keys/gitlab/db";
<link linkend="opt-services.gitlab.secrets.secretFile">secretFile</link> = "/var/keys/gitlab/secret";
<link linkend="opt-services.gitlab.secrets.otpFile">otpFile</link> = "/var/keys/gitlab/otp";
<link linkend="opt-services.gitlab.secrets.jwsFile">jwsFile</link> = "/var/keys/gitlab/jws";
};
<link linkend="opt-services.gitlab.extraConfig">extraConfig</link> = {
gitlab = {
@ -113,12 +85,16 @@ services.gitlab = {
</para>
<para>
If you're setting up a new Gitlab instance, generate new secrets. You for
instance use <literal>tr -dc A-Za-z0-9 &lt; /dev/urandom | head -c
128</literal> to generate a new secret. Gitlab encrypts sensitive data
stored in the database. If you're restoring an existing Gitlab instance, you
must specify the secrets secret from <literal>config/secrets.yml</literal>
located in your Gitlab state folder.
If you're setting up a new Gitlab instance, generate new
secrets. You for instance use <literal>tr -dc A-Za-z0-9 &lt;
/dev/urandom | head -c 128 &gt; /var/keys/gitlab/db</literal> to
generate a new db secret. Make sure the files can be read by, and
only by, the user specified by <link
linkend="opt-services.gitlab.user">services.gitlab.user</link>. Gitlab
encrypts sensitive data stored in the database. If you're restoring
an existing Gitlab instance, you must specify the secrets secret
from <literal>config/secrets.yml</literal> located in your Gitlab
state folder.
</para>
<para>

42
nixos/tests/gitlab.nix
View file

@ -29,44 +29,14 @@ import ./make-test.nix ({ pkgs, lib, ...} : with lib; {
services.gitlab = {
enable = true;
databasePassword = "dbPassword";
inherit initialRootPassword;
databasePasswordFile = pkgs.writeText "dbPassword" "xo0daiF4";
initialRootPasswordFile = pkgs.writeText "rootPassword" initialRootPassword;
smtp.enable = true;
secrets = {
secret = "secret";
otp = "otpsecret";
db = "dbsecret";
# nix-shell -p openssl --run "openssl genrsa 2048"
jws = ''
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
'';
secretFile = pkgs.writeText "secret" "Aig5zaic";
otpFile = pkgs.writeText "otpsecret" "Riew9mue";
dbFile = pkgs.writeText "dbsecret" "we2quaeZ";
jwsFile = pkgs.runCommand "oidcKeyBase" {} "${pkgs.openssl}/bin/openssl genrsa 2048 > $out";
};
};
};