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modules/external-storage: implement detectFs for s3c4

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This commit is contained in:
Max Headroom 2024-08-09 23:46:11 +02:00
parent 437e905b03
commit 055119d2c9
1 changed files with 17 additions and 2 deletions
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19
modules/external-storage/default.nix
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@ -109,7 +109,13 @@ in
value = let
isUnderlay = fs.underlay != null;
fsType = if isUnderlay then "local" else lib.head (lib.strings.match "([a-z0-9]*)://.*" fs.backend);
backendParts = lib.strings.match "([a-z0-9]*)://([^/]*)/([^/]*)(/.*)?" fs.backend;
fsType = if isUnderlay then "local" else lib.head backendParts;
s3Endpoint = assert fsType == "s3c4"; lib.elemAt backendParts 1;
s3Bucket = assert fsType == "s3c4"; lib.elemAt backendParts 2;
localBackendPath = if isUnderlay then cfg.underlays.${fs.underlay}.mountpoint else lib.head (lib.strings.match "[a-z0-9]*://(/.*)" fs.backend);
in {
@ -132,8 +138,12 @@ in
ExecStartPre = map lib.escapeShellArgs [
[
(let
authFile = if fs.locksmithSecret != null then
"/run/locksmith/${fs.locksmithSecret}"
else
cfgAge.secrets."storageAuth-${name}".path;
mkfsEncrypted = ''
${pkgs.gnugrep}/bin/grep -m1 fs-passphrase: '${config.age.secrets."storageAuth-${name}".path}' \
${pkgs.gnugrep}/bin/grep -m1 fs-passphrase: '${authFile}' \
| cut -d' ' -f2- \
| ${s3ql}/bin/mkfs.s3ql ${lib.escapeShellArgs fs.commonArgs} -L '${name}' '${fs.backend}'
'';
@ -144,6 +154,11 @@ in
detectFs = {
local = "test -e ${localBackendPath}/s3ql_metadata";
s3c4 = pkgs.writeShellScript "detect-s3ql-filesystem" ''
export AWS_ACCESS_KEY_ID="$(${pkgs.gnugrep}/bin/grep -m1 backend-login: '${authFile}' | cut -d' ' -f2-)"
export AWS_SECRET_ACCESS_KEY="$(${pkgs.gnugrep}/bin/grep -m1 backend-password: '${authFile}' | cut -d' ' -f2-)"
${pkgs.s5cmd}/bin/s5cmd --endpoint-url https://${s3Endpoint}/ ls 's3://${s3Bucket}/s3ql_params' >/dev/null
'';
}.${fsType} or null;
in pkgs.writeShellScript "create-s3ql-filesystem" (lib.optionalString (detectFs != null) ''
if ! ${detectFs}; then