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storage.conf
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storage.conf
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# This file is the configuration file for all tools
# that use the containers/storage library. The storage.conf file
# overrides all other storage.conf files. Container engines using the
# container/storage library do not inherit fields from other storage.conf
# files.
#
# Note: The storage.conf file overrides other storage.conf files based on this precedence:
# /usr/containers/storage.conf
# /etc/containers/storage.conf
# $HOME/.config/containers/storage.conf
# $XDG_CONFIG_HOME/containers/storage.conf (if XDG_CONFIG_HOME is set)
# See man 5 containers-storage.conf for more information
# The "storage" table contains all of the server options.
[storage]
# Default storage driver, must be set for proper operation.
driver = "overlay"
# Temporary storage location
runroot = "/run/containers/storage"
# Priority list for the storage drivers that will be tested one
# after the other to pick the storage driver if it is not defined.
# driver_priority = ["overlay", "btrfs"]
# Primary Read/Write location of container storage
# When changing the graphroot location on an SELinux system, you must
# ensure the labeling matches the default location's labels with the
# following commands:
# semanage fcontext -a -e /var/lib/containers/storage /NEWSTORAGEPATH
# restorecon -R -v /NEWSTORAGEPATH
graphroot = "/var/lib/containers/storage"
# Optional alternate location of image store if a location separate from the
# container store is required. If set, it must be different than graphroot.
# imagestore = ""
# Storage path for rootless users
#
# rootless_storage_path = "$HOME/.local/share/containers/storage"
# Transient store mode makes all container metadata be saved in temporary storage
# (i.e. runroot above). This is faster, but doesn't persist across reboots.
# Additional garbage collection must also be performed at boot-time, so this
# option should remain disabled in most configurations.
# transient_store = true
[storage.options]
# Storage options to be passed to underlying storage drivers
# AdditionalImageStores is used to pass paths to additional Read/Only image stores
# Must be comma separated list.
additionalimagestores = [
]
# Options controlling how storage is populated when pulling images.
[storage.options.pull_options]
# Enable the "zstd:chunked" feature, which allows partial pulls, reusing
# content that already exists on the system. This is disabled by default,
# and must be explicitly enabled to be used. For more on zstd:chunked, see
# https://github.com/containers/storage/blob/main/docs/containers-storage-zstd-chunked.md
# This is a "string bool": "false" | "true" (cannot be native TOML boolean)
# enable_partial_images = "false"
# Tells containers/storage to use hard links rather then create new files in
# the image, if an identical file already existed in storage.
# This is a "string bool": "false" | "true" (cannot be native TOML boolean)
# use_hard_links = "false"
# Path to an ostree repository that might have
# previously pulled content which can be used when attempting to avoid
# pulling content from the container registry.
# ostree_repos=""
# If set to "true", containers/storage will convert images that are
# not already in zstd:chunked format to that format before processing
# in order to take advantage of local deduplication and hard linking.
# It is an expensive operation so it is not enabled by default.
# This is a "string bool": "false" | "true" (cannot be native TOML boolean)
# convert_images = "false"
# Root-auto-userns-user is a user name which can be used to look up one or more UID/GID
# ranges in the /etc/subuid and /etc/subgid file. These ranges will be partitioned
# to containers configured to create automatically a user namespace. Containers
# configured to automatically create a user namespace can still overlap with containers
# having an explicit mapping set.
# This setting is ignored when running as rootless.
# root-auto-userns-user = "storage"
#
# Auto-userns-min-size is the minimum size for a user namespace created automatically.
# auto-userns-min-size=1024
#
# Auto-userns-max-size is the maximum size for a user namespace created automatically.
# auto-userns-max-size=65536
[storage.options.overlay]
# ignore_chown_errors can be set to allow a non privileged user running with
# a single UID within a user namespace to run containers. The user can pull
# and use any image even those with multiple uids. Note multiple UIDs will be
# squashed down to the default uid in the container. These images will have no
# separation between the users in the container. Only supported for the overlay
# and vfs drivers.
# This is a "string bool": "false" | "true" (cannot be native TOML boolean)
#ignore_chown_errors = "false"
# Inodes is used to set a maximum inodes of the container image.
# inodes = ""
# Path to an helper program to use for mounting the file system instead of mounting it
# directly.
#mount_program = "/usr/bin/fuse-overlayfs"
# mountopt specifies comma separated list of extra mount options
mountopt = "nodev"
# Set to skip a PRIVATE bind mount on the storage home directory.
# This is a "string bool": "false" | "true" (cannot be native TOML boolean)
# skip_mount_home = "false"
# Set to use composefs to mount data layers with overlay.
# This is a "string bool": "false" | "true" (cannot be native TOML boolean)
# use_composefs = "false"
# Size is used to set a maximum size of the container image.
# size = ""
# ForceMask specifies the permissions mask that is used for new files and
# directories.
#
# The values "shared" and "private" are accepted.
# Octal permission masks are also accepted.
#
# "": No value specified.
# All files/directories, get set with the permissions identified within the
# image.
# "private": it is equivalent to 0700.
# All files/directories get set with 0700 permissions. The owner has rwx
# access to the files. No other users on the system can access the files.
# This setting could be used with networked based homedirs.
# "shared": it is equivalent to 0755.
# The owner has rwx access to the files and everyone else can read, access
# and execute them. This setting is useful for sharing containers storage
# with other users. For instance have a storage owned by root but shared
# to rootless users as an additional store.
# NOTE: All files within the image are made readable and executable by any
# user on the system. Even /etc/shadow within your image is now readable by
# any user.
#
# OCTAL: Users can experiment with other OCTAL Permissions.
#
# Note: The force_mask Flag is an experimental feature, it could change in the
# future. When "force_mask" is set the original permission mask is stored in
# the "user.containers.override_stat" xattr and the "mount_program" option must
# be specified. Mount programs like "/usr/bin/fuse-overlayfs" present the
# extended attribute permissions to processes within containers rather than the
# "force_mask" permissions.
#
# force_mask = ""