-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
39 changed files
with
921 additions
and
858 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
||
| function myexec(string $cmd): string | ||
| { | ||
| exec($cmd, $lines, $resCode); | ||
| if ($resCode !== 0) { | ||
| throw new \Exception( | ||
| 'Non-zero exit' . "\n" | ||
| . 'code: ' . $resCode . "\n" | ||
| . 'cmd: ' . $cmd . "\n" | ||
| . 'output:' . implode("\n", $lines) . "\n" | ||
| ); | ||
| } | ||
|
|
||
| return implode("\n", $lines); | ||
| } | ||
|
|
||
| class FileEntry | ||
| { | ||
| /** @var int */ | ||
| public $size; | ||
| /** @var int concat(device_id, inode_id, hash) */ | ||
| public $inode; | ||
| /** @var int */ | ||
| public $hash; | ||
| } | ||
|
|
||
| $targetImageId = myexec('docker inspect --format="{{.Id}}" "' . $argv[1] . '"'); | ||
|
|
||
| $baseImageId = null; | ||
| if (count($argv) > 2) { | ||
| $baseImageId = myexec('docker inspect --format="{{.Id}}" "' . $argv[2] . '"'); | ||
| } | ||
|
|
||
| $out = myexec('docker history --no-trunc --format "table {{.ID}}\t{{.CreatedBy}}" ' . $targetImageId); | ||
|
|
||
| $layers = []; | ||
| foreach (array_reverse(array_slice(explode("\n", $out), 1 /* first line is header */)) as $l) { | ||
| [$lId, $lCmd] = preg_split('~\t| {2,}~', $l, 2); | ||
| if ($lId === '<missing>') { | ||
| continue; | ||
| } elseif ($lId === $baseImageId) { | ||
| $layers = []; | ||
| $baseImageId = null; | ||
| } | ||
|
|
||
| $layers[] = [$lId, $lCmd]; | ||
| } | ||
|
|
||
| // analyse filesystem diff between each layer | ||
| foreach (array_slice($layers, 1 /* skip one image for prev */, null, true) as $k => $lArr) { | ||
| $lArrPrev = $layers[$k - 1]; | ||
| echo '--> analysing diff between:' . "\n"; | ||
| echo '--> ' . implode(' ', $lArrPrev) . "\n"; | ||
| echo '--> ' . implode(' ', $lArr) . "\n"; | ||
|
|
||
| $getImageFilesFx = function (string $imageId): array { | ||
| $out = myexec('docker run "' . $imageId . '" /bin/sh -c \'find / -xdev -type f -exec du -b {} \; -exec stat -c %D_%i {} \; -exec sha256sum {} \;\''); | ||
| $res = []; | ||
| foreach (array_chunk(explode("\n", $out), 3) as [$l, $lDevInode, $lHash]) { | ||
| [$size, $path] = preg_split('~\t| {2,}~', $l, 2); | ||
| $hash = explode(' ', $lHash, 2)[0]; | ||
| $fileEntry = new FileEntry(); | ||
| $fileEntry->size = $size + 0; | ||
| $fileEntry->inode = $lDevInode . '_' . $hash; | ||
| $fileEntry->hash = $hash; | ||
| $res[$path] = $fileEntry; | ||
| } | ||
| ksort($res); | ||
|
|
||
| return $res; | ||
| }; | ||
| $fsPrev = $getImageFilesFx($lArrPrev[0]); | ||
| $fsCurr = $getImageFilesFx($lArr[0]); | ||
|
|
||
| // calc dedup, prev must be always first | ||
| $psByInode = []; | ||
| $psByHash = []; | ||
| foreach ($fsPrev as $p => $f) { | ||
| $psByInode[$f->inode][] = $p; | ||
| $psByHash[$f->hash][] = $p; | ||
| } | ||
| foreach ($fsCurr as $p => $f) { | ||
| if (!isset($fsPrev[$p]) || $f->inode !== $fsPrev[$p]->inode) { | ||
| $psByInode[$f->inode][] = $p; | ||
| } | ||
| if (!isset($fsPrev[$p]) || $f->hash !== $fsPrev[$p]->hash) { | ||
| $psByHash[$f->hash][] = $p; | ||
| } | ||
| } | ||
|
|
||
| // merge all seen paths and sort by largest size | ||
| $pSorted = array_unique(array_merge(array_keys($fsPrev), array_keys($fsCurr))); | ||
| usort($pSorted, function (string $pA, string $pB) use ($fsPrev, $fsCurr): int { | ||
| $aSize = max(isset($fsCurr[$pA]) ? $fsCurr[$pA]->size : 0, isset($fsPrev[$pA]) ? $fsPrev[$pA]->size : 0); | ||
| $bSize = max(isset($fsCurr[$pB]) ? $fsCurr[$pB]->size : 0, isset($fsPrev[$pB]) ? $fsPrev[$pB]->size : 0); | ||
|
|
||
| return $bSize <=> $aSize; | ||
| }); | ||
|
|
||
| // show removed/added files | ||
| foreach ($pSorted as $p) { | ||
| if (isset($fsPrev[$p]) && isset($fsCurr[$p]) && $fsPrev[$p]->inode === $fsCurr[$p]->inode | ||
| || in_array($p, ['/.dockerenv', '/etc/hostname', '/etc/hosts', '/etc/resolv.conf'], true)) { | ||
| continue; | ||
| } | ||
|
|
||
| foreach ([1 => $fsPrev, 0 => $fsCurr] as $isPrev => $fs) { | ||
| if (!isset($fs[$p])) { | ||
| continue; | ||
| } | ||
| $f = $fs[$p]; | ||
|
|
||
| echo $isPrev ? '-' : '+'; | ||
| if ($p !== reset($psByInode[$f->inode])) { | ||
| echo '(deduped by inode from ' . reset($psByInode[$f->inode]) . ')'; | ||
| } else { | ||
| if ($f->size !== 0 && $p !== reset($psByHash[$f->hash])) { | ||
| echo '(deduped by hash from ' . reset($psByHash[$f->hash]) . ')'; | ||
| } | ||
| echo number_format($f->size / 1000, 3, '.', ' ') . 'K'; | ||
| } | ||
| echo ' ' . $p . "\n"; | ||
| } | ||
| } | ||
|
|
||
| echo "\n\n"; | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.