Linux Containers - LXC

23 Nov 2018

Introduction¶

The LXC team is pleased to announce the release of LXC 3.0.3!

As a stable bugfix release, no major changes have been done, instead focusing on bugfixes and minor usability improvements.

Highlights¶

Improved our default build flags to make use of compiler hardening
Added support for netlink strict property checking on newer kernels
Added support for new netlink interface/address netns API
Added handling of the kernel keyring on startup

Bugfixes (LXC)¶

CONTRIBUTING: Update reference to kernel coding style
CONTRIBUTING: Link to latest online kernel docs
CONTRIBUTING: Direct readers to CODING_STYLE.md
CODING_STYLE: Mention kernel style in introduction
CONTRIBUTING: Add 'be' to fix grammar
CODING_STLYE: Simplify explanation for use of 'extern'
CODING_STLYE: Remove sections implied by 'kernel style'
CODING_STYLE: Fix non-uniform heading level
CODING_STYLE: Update section header format
cmd: Use parenthesis around complex macro
cmd: Use 'void' instead of empty parameter list
cmd: Do not use braces for single statement block
cmd: Fix whitespace issues
cmd: Use 'const' for static string constant.
cmd: Remove unnecessary whitespace in string
cmd: Put trailing */ on a separate line
cmd: Remove typo'd semicolon
cmd: Do not use comparison to NULL
lxc_init: s/SYSDEBUG()/SYSERROR()/g in remove_self
tools: lxc-attach: add default log priority & cleanups
tools: lxc-cgroup: add default log priority & cleanups
tools: lxc-checkpoint: add default log priority & cleanups
tools: lxc-console: add default log priority & cleanups
tools: lxc-create: add default log priority & cleanups
tools: lxc-destroy: add default log priority & cleanups
tools: lxc-device: add default log priority & cleanups
tools: lxc-execute: add default log priority & cleanups
tools: lxc-start: add default log priority & cleanups
tools: lxc-stop: add default log priority & cleanups
tools: lxc-freeze: add default log priority & cleanups
tools: lxc-unfreeze: add default log priority & cleanups
storage_utils: move duplicated function from tools
tools: fix lxc-execute command parsing
lseek - integer overflow
cmd: lxc-user-nic: change log macro & cleanups
cmd: lxc-usernsexec reorder includes
cmd: move declarations to macro.h
cmd: use utils.{c,h} helpers in lxc-usernsexec
cmd: simplify lxc-usernsexec
cmd: use safe number parsers in lxc-usernsexec
macro: add missing headers
macro: add macvlan properties
tools: Indicate container startup failure
storage: exit() => _exit(). when exec is failed, child process needs to use _exit()
tools: lxc-wait: add default log priority & cleanups
conf: fix path/lxcpath mixups in tty setup
cmd: use goto for cleanup in lxc-usernsexec
cmd: Do not reassign variable before it is used
cmd: Reduce scope of 'count' variable
cmd: Fix format issues found by clang-format
list: fix indent
utils: split into {file,string}_utils.{c,h}
pam_cgfs: build from the same sources as liblxc
conf: fix devpts mounting when fully unprivileged
macro: s/rexit()/_exit()/g
attach: move struct declaration to top
macro: move macros from attach.c
Makefile: don't allow undefined symbols
autotools: check if compiler is new enough
log: handle strerror_r() versions
autotools: add --{disable,enable}-thread-safety
log: fail build on ENFORCE_THREAD_SAFETY error
{file,string}_utils: remove NO_LOG
initutils: remove useless comment
string_utils: remove unnecessary include
string_utils: remove unused headers
string_utils: add remove_trailing_slashes()
Makefile: remove last pam_cgfs special-casing
conf: add missing headers
Fix typo
ifaddrs: add safe implementation of getifaddrs()
Makefile: conditionalize ifaddrs.h inclusion
execute: skip lxc-init logging when unprivileged
execute: pass /proc/self/fd/
tests: cleanup get_item.c
build: fix musl
configure: reorder header checks
compiler: add compiler.h header
commands: return -1 on lxc_cmd_get_init_pid() err
tests: add basic.c
tests: cleanup Makefile
commands: ensure -1 is sent on EPIPE for init pid
macro: add LXC_AUDS_ADDR_LEN
macro: move LXC_CMD_DATA_MAX from commands.h
macro: add PTR_TO_INT() and INT_TO_PTR()
macro: add INTTYPE_TO_STRLEN()
caps: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
cgfsng: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
confile: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
log: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
lsm: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
macro: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
lxccontainer: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
monitor: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
network: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
string_utils: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
utils: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
tools: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
conf: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
tests: s/LXC_NUMSTRLEN64/INTTYPE_TO_STRLEN()/
macro: final INTTYPE_TO_STRLEN() related cleanups
macro: coding style fixes
Makefile: correctly add ifaddrs to noinst_HEADERS
start: remove duplicate macros
caps: move macros to macro header
string_utils: use UINT64_MAX macro
tree-wide: use sizeof on static arrays
Revert "tree-wide: use sizeof on static arrays"
commands: pass around intmax_t
commands: assign before converting to pointer
macro: calculate buffer lengths correctly
Revert "Revert "tree-wide: use sizeof on static arrays""
macro: move MS_* macros
caps: fix illegal access to array bound
utils: defensive programming
nl: remove duplicated define
syntax error: mismatch brace
commands: better error message
file_utils: add lxc_recv_nointr()
commands: switch to setting errno and returning -1
log: do not clobber errno
log: save errno on strerror_r()
tree-wide: s/recv()/lxc_recv_nointr()/g
file_utils: add lxc_send_nointr()
tree-wide: s/send()/lxc_send_nointr()/g
nl: save errno on lxc_netns_set_nsid()
log: log_append_logfile() add new error path
lxccontainer: fix dereferenced pointer
lxc: fix build with --disable-werror
utils: improve get_ns_uid() and add get_ns_gid()
utils: improve lxc_switch_uid_gid()
log: support dlog
attach: handle id switching smarter
start: avoid unnecessary syscalls
utils: make lxc_setgroups() return bool
utils: make lxc_switch_uid_gid() return bool
lxccontainer: use correct pid_t type
conf: remove extra MS_BIND with sysfs:mixed
network: use correct type in lxc_netns_set_nsid()
network: add lxc_netns_get_nsid()
remove unused variables
file_utils: remove unused function
network: minor tweaks
add compile flags for dlog
log: add common functions
log: add additional info of dlog
attach: don't shutdown ipc socket in child
security: fix too wide or inconsistent non-owner permissions
attach: report standard shell exit codes
af_unix: add function to remove duplicated codes for set sockaddr
lxccontainer: remove locks from set_cgroup_item()
lxccontainer: remove locks from get_cgroup_item()
apparmor: account for specified rootfs path (closes #2617)
conf: realpath() uses null as second parameter to prevent buffer overflow
start: s/backgrounded/daemonize/g
cgfsng: mark ops with __cgfsng_ops__ attribute
autotools: add -Wimplicit-fallthrough
cgroup: rename container specific cgroup functions
cgroups: s/fullcgpath/container_full_path/g
cgroups: add missing string.h include
cgroups: s/base_cgroup/container_base_path/g
autotools: fix wrong AX_CHECK_COMPILE_FLAG test
compiler: s/__fallthrough__/__fallthrough/g
compiler: s/__noreturn__/__noreturn/g
cgfsng: s/__cgfsng_ops__/__cgfsng_ops/g
macro: add STRLITERALLEN() and STRARRAYLEN()
tree-wide: replace sizeof() with SIZEOF2STRLEN()
compiler: __attribute__((noreturn)) on bionic
autotools: support -Wcast-align
autotools: support -Wstrict-prototypes
network: add netns_getifaddrs() implementation
tree_wide: switch to netns_getifaddrs()
netns_ifaddrs: mark casts as safe
autotools: fix lxc_user_nic build
stop: Only freeze if freezer is available
doc: tweak documentation a little
cgfsng: set errno to ENOENT on get_hierarchy()
cgfsng: s/cgfsng_destroy/cgfsng_payload_destroy/g
cgfsng: s/25/INTTYPE_TO_STRLEN(pid_t)/g
compiler: fix __noreturn on bionic
compiler: add __hot attribute
netns_ifaddrs: fix missing include
autools: prevent dlog build on stable branch
tree-wide: fix includes to fix bionic builds
template: oci template supports for char user info
btrfs: fix btrfs containers
oci-template: Add logic for no /etc/passwd, group
configure: fix -Wimplicit-fallthrough check
utils: add lxc_setup_keyring()
autotools: support -z relro and -z now
netns_ifaddrs: handle IFLA_STATS{64} correctly
syscall_wrappers: add pivot_root()
raw_syscalls: add lxc_raw_execveat()
raw_syscalls: add lxc_raw_clone{_cb}()
raw_syscalls: add lxc_raw_getpid()
autotools: fix lxc init build
autotools: fix lxc-monitord build
autotools: fix lxc-user-nic build
autotools: fix lxc-usernsexec build
tests: add missing build dependencies
netns_ifaddrs: only use struct rtnl_link_stats64
cgroups: remove unnecessary line
netns_iaddrs: remove unused functions
parse: prefault config file with MAP_POPULATE
cgfsng: avoid tiny race window
utils: fix lxc_set_death_signal()
cgfsng: handle v1 cpuset hierarchy first
syscall_wrappers: move memfd_create()
syscall_wrappers: move setns()
syscall_wrappers: move sethostname()
syscall_wrappers: move unshare()
syscall_wrappers: move signalfd()
raw_syscalls: move lxc_raw_gettid()
tools: lxc-start: remove unused argument
tools: lxc-unshare: remove unnecessary initialization
parse: remove access() check
parse: report errors when failing config parsing
macro: add PATH_MAX
cmd: s/MAXPATHLEN/PATH_MAX/g
conf: s/MAXPATHLEN/PATH_MAX/g
confile: s/MAXPATHLEN/PATH_MAX/g
log: s/MAXPATHLEN/PATH_MAX/g
lxccontainer: s/MAXPATHLEN/PATH_MAX/g
macro: s/MAXPATHLEN/PATH_MAX/g
network: s/MAXPATHLEN/PATH_MAX/g
pam: s/MAXPATHLEN/PATH_MAX/g
start: s/MAXPATHLEN/PATH_MAX/g
terminal: s/MAXPATHLEN/PATH_MAX/g
utils: s/MAXPATHLEN/PATH_MAX/g
storage: s/MAXPATHLEN/PATH_MAX/g
tools: s/MAXPATHLEN/PATH_MAX/g
attach: reset signal mask
start: change log level
file_utils: fix too wide or inconsistent non-owner permissions
attach: fix missing pthread.h include
macro: add NETLINK_DUMP_STRICT_CHK
macro: add SOL_NETLINK
netns_ifaddrs: check for NETLINK_DUMP_STRICT_CHK
parse: do not mask failed parse
test: test invalid config keys
confile: remove unused variable
parse: fix uninitialized pointer access
fix rpm packaging error for static library
fix post section script error for rpm install
conf: log prlimit setup
conf: verify_start_hooks() after lxc.mount.entry
checkpoint: fix running do_dump()
monitor: log cleanups
monitor: checking name too long to make monitor sock name
commands_utils: improve code redundancy to make abstract unix socket name
monitor: fix coding standard
autools: use -fno-strict-aliasing
checkconfig: Handle missing kernel version
lxc-init: log to /dev/console
autotools: fix --disable-commands builds
string_utils: fix global buffer overflow issue
include: simplify strlcpy()
raw_syscalls: ensure function always returns value
confile: fix append_unexp_config_line()
parse: protect against config updates during parse
parse: fix uninitialized value
tree-wide: coding style fixes
start: simplify
autotools: compiler based hardening
coverity: update .travis.yml
coverity: update .travis.yml
coverity: update .travis.yml
coverity: update .travis.yml
coverity: update .travis.yml
confile: do not overwrite global variable
commands: simplify
cgfsng: move increment out of branch
monitord: do not hide global variable
tools/lxc_copy: do not hide global variable
tools/lxc_top: do not hide global variable
tools/lxc_info: do not hide global variable
state: remove tautological check
conf: remove tautological check
conf: use O_CLOEXEC in lxc_pivot_root()
conf: remove tautological check
lxccontainer: remove check from goto target
start: prevent values smaller 0
tools/lxc_stop: use correct check
cmd/lxc_init: do not hide global variable
coverity: #1440391
coverity: #1440389
coverity: #1426130
storage_utils: add error handling
storage_utils: cleanups
storage_utils: use _exit() instead of exit() in child process
parse: cleanups
dlog: inherit dlog fds
spelling: allocate
spelling: ambiguous
spelling: answer
spelling: architecture
spelling: array
spelling: asynchronous
spelling: backingstorage
spelling: capabilities
spelling: character
spelling: checkpoint
spelling: comma
spelling: command
spelling: committer
spelling: configuration
spelling: constant
spelling: container
spelling: control
spelling: convenience
spelling: could
spelling: describing
spelling: device
spelling: exiting
spelling: explicitly
spelling: feature
spelling: github
spelling: hierarchy
spelling: hoops
spelling: ifindices
spelling: implementations
spelling: inherited
spelling: initialize
spelling: javascript
spelling: keepdata
spelling: libraries
spelling: loglevel
spelling: namespace
spelling: otherwise
spelling: output
spelling: overlayfs
spelling: overridden
spelling: override
spelling: passphrase
spelling: perhaps
spelling: pertains
spelling: portion
spelling: potentially
spelling: returns
spelling: root
spelling: securityfs
spelling: snapshotting
spelling: specified
spelling: specify
spelling: subtracting
spelling: successfully
spelling: syscall
spelling: timeout
spelling: unsigned
spelling: userns
spelling: without
lxcmntent: coding rules
string_utils: coding rules
log: fix too wide or inconsistent non-owner permissions
coverity: move to separate branch
include: correctly include macro.h
Fix spacing error in namespace.c
caps: replace read with lxc_read_nointr
log: replace write with lxc_write_nointr
dlog: move match_dlog_fds()
conf: s/ty/tty/g
pam_cgfs: remove redundancy file utils
cgfs: remove redundancy utils
pam_cgfs: remove dependency from cap & log
utils: fix coding styles
utils: add errno logs for exception case
Adds -qq flags to lvcreate commands to avoid answer 'no' to ant questions the LVM subsystem asks to avoid hanging lxc-create command
utils: make keyring allocation failure non-fatal
autotools: fix lxc-{create,copy} build
cgfsng: remove freezer requirement
start: don't call cgroup_exit() twice

Bugfixes (LXC templates)¶

alpine: Make dropping setpcap optional
plamo: Update the default version to 7.x
sabayon: Don't fail on existing directories

Bugfixes (python3 binding)¶

No changes in this release, version bump only

Support and upgrade¶

LXC 3.0.3 is supported until June 2023 and is our current LTS release, users are encouraged to update to the latest bugfix releases as they're made available.

Downloads¶

Main release tarball: lxc-3.0.3.tar.gz (GPG: lxc-3.0.3.tar.gz.asc)
LXC templates tarball: lxc-templates-3.0.3.tar.gz (GPG: lxc-templates-3.0.3.tar.gz.asc)
LXC python3 bindings tarball: python3-lxc-3.0.3.tar.gz (GPG: python3-lxc-3.0.3.tar.gz.asc)

Contents

LXC 3.0.3 has been released

LXC 3.0.3 has been released¶