On contint1001, when building the operations-puppet Docker image, it takes a while on:
Step 12/16 : RUN chown -R nobody /srv/workspace/.cache && mkdir -p /tmp/cache && mv /srv/workspace/.cache/puppet /tmp/cache/puppet && mkdir -p /tmp/cache/puppet/.bundle && mv /srv/workspace/.cache/bundle-config /tmp/cache/puppet/.bundle/config && mv /srv/workspace/.cache/tox /tmp/cache/puppet/.tox
The reason seems to be chown -R nobody /srv/workspace/.cache. Via strace:
newfstatat(4</srv/workspace/.cache/puppet/modules/role/templates>, "haproxy", {st_mode=S_IFDIR|0755, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0
openat(4</srv/workspace/.cache/puppet/modules/role/templates>, "haproxy", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_DIRECTORY|O_NOFOLLOW) = 3</srv/workspace/.cache/puppet/modules/role/templates/haproxy>
fcntl(3</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, F_GETFD) = 0
fcntl(3</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, F_SETFD, FD_CLOEXEC) = 0
fstat(3</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
fcntl(3</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, F_GETFL) = 0x38800 (flags O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_NOFOLLOW)
fcntl(3</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, F_SETFD, FD_CLOEXEC) = 0
fcntl(3</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, F_DUPFD, 3) = 6
fcntl(6</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, F_GETFD) = 0
fcntl(6</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, F_SETFD, FD_CLOEXEC) = 0
getdents(3</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, /* 5 entries */, 32768) = 160
getdents(3</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, /* 0 entries */, 32768) = 0
close(3</srv/workspace/.cache/puppet/modules/role/templates/haproxy>) = 0
fchownat(6</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, "db-slaves.cfg.erb", 65534, 4294967295, AT_SYMLINK_NOFOLLOW) = 0
fchownat(6</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, "db.cfg.erb", 65534, 4294967295, AT_SYMLINK_NOFOLLOW) = 0
fchownat(6</srv/workspace/.cache/puppet/modules/role/templates/haproxy>, "db-master.cfg.erb", 65534, 4294967295, AT_SYMLINK_NOFOLLOW) = 0
close(6</srv/workspace/.cache/puppet/modules/role/templates/haproxy>) = 0
fchownat(4</srv/workspace/.cache/puppet/modules/role/templates>, "haproxy", 65534, 4294967295, AT_SYMLINK_NOFOLLOW) = 0I would suspect that manipulating files causes a copy of the files.
Previously there is a noticeable delay:
Step 10/16 : COPY --from=builder /tmp/cache /srv/workspace/.cache
It probably refer to the same files, but changing the owner would trigger a file copy.
From docker info:
Storage Driver: overlay2 Backing Filesystem: extfs Supports d_type: true Native Overlay Diff: true
On my local machine the chown is fast. I got SSD but the storage driver is devicemapper