2026-06-02 14:28:56,053: INFO: Building opensdn-external-haproxy 2026-06-02 14:28:56,380: INFO: Building args: --network host --build-arg PIP_REPOSITORY=http://localhost:6667/pip/simple --build-arg CONTRAIL_REGISTRY=nexus.gz1.opensdn.io:5101 --build-arg CONTRAIL_CONTAINER_TAG=master-2_8_0_1-6 --build-arg SITE_MIRROR=http://nexus.gz1.opensdn.io/repository/external-web-cache --build-arg LINUX_DISTR_VER=9 --build-arg LINUX_DISTR=rockylinux --build-arg CONTAINER_NAME=opensdn-external-haproxy --build-arg UBUNTU_DISTR_VERSION=24.04 --build-arg UBUNTU_DISTR=ubuntu --build-arg VENDOR_NAME=OpenSDN-IO --build-arg VENDOR_DOMAIN=io.opensdn --build-arg BUILD_IMAGE=tf-dev-sandbox:compile --build-arg BUILD_ROOT=/buildroot --build-arg DEBUGINFO_ROOT=/debuginfo #0 building with "default" instance using docker driver #1 [internal] load build definition from Dockerfile #1 transferring dockerfile: #1 transferring dockerfile: 1.55kB done #1 DONE 0.8s #2 [internal] load metadata for docker.io/library/haproxy:3.3-dev #2 DONE 2.7s #3 [internal] load .dockerignore #3 transferring context: #3 transferring context: 2B done #3 DONE 0.2s #4 [internal] load build context #4 DONE 0.0s #5 [1/5] FROM docker.io/library/haproxy:3.3-dev@sha256:22fcedee226900a3a80ab9d2d75bf19810b8684db2025944d2b78e1c4b44b0cf #5 resolve docker.io/library/haproxy:3.3-dev@sha256:22fcedee226900a3a80ab9d2d75bf19810b8684db2025944d2b78e1c4b44b0cf #5 resolve docker.io/library/haproxy:3.3-dev@sha256:22fcedee226900a3a80ab9d2d75bf19810b8684db2025944d2b78e1c4b44b0cf 0.6s done #5 sha256:22fcedee226900a3a80ab9d2d75bf19810b8684db2025944d2b78e1c4b44b0cf 10.20kB / 10.20kB done #5 sha256:332172c9158b20f951fba841aefb485937c120c27ff5b27e45f11d2023159b17 2.10kB / 2.10kB done #5 sha256:a6c1c5c2236cf1158aa01889c0f0ae8a9cf512460237f7fda70e73fe4bc7a4b2 4.83kB / 4.83kB done #5 ... #4 [internal] load build context #4 transferring context: 49.25kB done #4 DONE 0.7s #5 [1/5] FROM docker.io/library/haproxy:3.3-dev@sha256:22fcedee226900a3a80ab9d2d75bf19810b8684db2025944d2b78e1c4b44b0cf #5 sha256:a35cbb79fd67774977b78a72b186a533bdb2725cb5202ac0e107879e5cb3a291 0B / 1.58MB 2.6s #5 sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 1.05MB / 29.78MB 2.6s #5 sha256:a35cbb79fd67774977b78a72b186a533bdb2725cb5202ac0e107879e5cb3a291 1.58MB / 1.58MB 2.7s done #5 sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 5.24MB / 29.78MB 2.8s #5 sha256:564c4e23d8c5e108855ff204c2d4a37767e19482dcf8d216f90779590f6e05b1 1.16kB / 1.16kB 2.7s done #5 sha256:d007da98d4d28f3c978b9d2d75d64e8ac8ac7d52673036e5b190925775d59ddd 0B / 12.00MB 2.8s #5 sha256:1e70ca6be0de8b2a496ed9b04f54bfae2d5eb39ea3c553309a74019c8270b761 0B / 449B 2.8s #5 sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 8.39MB / 29.78MB 2.9s #5 sha256:d007da98d4d28f3c978b9d2d75d64e8ac8ac7d52673036e5b190925775d59ddd 2.10MB / 12.00MB 2.9s #5 sha256:1e70ca6be0de8b2a496ed9b04f54bfae2d5eb39ea3c553309a74019c8270b761 449B / 449B 2.8s done #5 sha256:4f4fb700ef54461cfa02571ae0db9a0dc1e0cdb5577484a6d75e68dc38e8acc1 0B / 32B 2.9s #5 sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 11.53MB / 29.78MB 3.1s #5 sha256:d007da98d4d28f3c978b9d2d75d64e8ac8ac7d52673036e5b190925775d59ddd 7.34MB / 12.00MB 3.1s #5 sha256:4f4fb700ef54461cfa02571ae0db9a0dc1e0cdb5577484a6d75e68dc38e8acc1 32B / 32B 2.9s done #5 sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 17.83MB / 29.78MB 3.3s #5 sha256:d007da98d4d28f3c978b9d2d75d64e8ac8ac7d52673036e5b190925775d59ddd 11.53MB / 12.00MB 3.3s #5 sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 22.02MB / 29.78MB 3.6s #5 sha256:d007da98d4d28f3c978b9d2d75d64e8ac8ac7d52673036e5b190925775d59ddd 12.00MB / 12.00MB 3.4s done #5 sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 25.17MB / 29.78MB 3.7s #5 sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 29.78MB / 29.78MB 4.0s #5 sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 29.78MB / 29.78MB 4.1s done #5 extracting sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db #5 extracting sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 5.2s #5 extracting sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 10.3s #5 extracting sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 15.3s #5 extracting sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 21.2s #5 extracting sha256:0e4bc2bd6656e6e004e3c749af70e5650bac2258243eb0949dea51cb8b7863db 22.8s done #5 extracting sha256:a35cbb79fd67774977b78a72b186a533bdb2725cb5202ac0e107879e5cb3a291 #5 extracting sha256:a35cbb79fd67774977b78a72b186a533bdb2725cb5202ac0e107879e5cb3a291 1.4s done #5 extracting sha256:564c4e23d8c5e108855ff204c2d4a37767e19482dcf8d216f90779590f6e05b1 #5 extracting sha256:564c4e23d8c5e108855ff204c2d4a37767e19482dcf8d216f90779590f6e05b1 0.0s done #5 extracting sha256:d007da98d4d28f3c978b9d2d75d64e8ac8ac7d52673036e5b190925775d59ddd #5 extracting sha256:d007da98d4d28f3c978b9d2d75d64e8ac8ac7d52673036e5b190925775d59ddd 5.0s #5 extracting sha256:d007da98d4d28f3c978b9d2d75d64e8ac8ac7d52673036e5b190925775d59ddd 5.4s done #5 extracting sha256:1e70ca6be0de8b2a496ed9b04f54bfae2d5eb39ea3c553309a74019c8270b761 done #5 extracting sha256:4f4fb700ef54461cfa02571ae0db9a0dc1e0cdb5577484a6d75e68dc38e8acc1 #5 extracting sha256:4f4fb700ef54461cfa02571ae0db9a0dc1e0cdb5577484a6d75e68dc38e8acc1 done #5 DONE 38.1s #6 [2/5] RUN mkdir /licenses #6 DONE 1.6s #7 [3/5] COPY __licensing.txt /licenses/licensing.txt #7 DONE 0.4s #8 [4/5] COPY *.sh / #8 DONE 0.2s #9 [5/5] RUN /bin/bash -c 'for item in `ls /__*` ; do mv $item /${item:3} ; done' ; export DEBIAN_FRONTEND=noninteractive ; apt-get update || /bin/true ; apt-get -y install python3-minimal ; apt-get clean && rm -rf /var/lib/apt/lists/* #9 0.528 /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8): No such file or directory #9 0.801 Get:1 http://deb.debian.org/debian trixie InRelease [140 kB] #9 0.885 Get:2 http://deb.debian.org/debian trixie-updates InRelease [47.3 kB] #9 0.914 Get:3 http://deb.debian.org/debian-security trixie-security InRelease [43.4 kB] #9 0.956 Get:4 http://deb.debian.org/debian trixie/main amd64 Packages [9671 kB] #9 1.244 Get:5 http://deb.debian.org/debian trixie-updates/main amd64 Packages [5412 B] #9 1.244 Get:6 http://deb.debian.org/debian-security trixie-security/main amd64 Packages [195 kB] #9 3.014 Fetched 10.1 MB in 2s (4265 kB/s) #9 3.014 Reading package lists... #9 3.782 Reading package lists... #9 5.821 Building dependency tree... #9 6.492 Reading state information... #9 7.230 The following additional packages will be installed: #9 7.230 libexpat1 libffi8 libgpm2 libncursesw6 libpython3.13-minimal #9 7.230 libpython3.13-stdlib libreadline8t64 media-types netbase python3.13 #9 7.230 python3.13-minimal readline-common #9 7.237 Suggested packages: #9 7.237 gpm python3.13-venv python3.13-doc binutils binfmt-support readline-doc #9 7.647 The following NEW packages will be installed: #9 7.662 libexpat1 libffi8 libgpm2 libncursesw6 libpython3.13-minimal #9 7.662 libpython3.13-stdlib libreadline8t64 media-types netbase python3-minimal #9 7.662 python3.13 python3.13-minimal readline-common #9 7.807 0 upgraded, 13 newly installed, 0 to remove and 15 not upgraded. #9 7.807 Need to get 6383 kB of archives. #9 7.807 After this operation, 24.3 MB of additional disk space will be used. #9 7.807 Get:1 http://deb.debian.org/debian trixie/main amd64 libexpat1 amd64 2.7.1-2 [108 kB] #9 7.922 Get:2 http://deb.debian.org/debian trixie/main amd64 libpython3.13-minimal amd64 3.13.5-2+deb13u2 [862 kB] #9 8.047 Get:3 http://deb.debian.org/debian trixie/main amd64 python3.13-minimal amd64 3.13.5-2+deb13u2 [2217 kB] #9 8.103 Get:4 http://deb.debian.org/debian trixie/main amd64 python3-minimal amd64 3.13.5-1 [27.2 kB] #9 8.103 Get:5 http://deb.debian.org/debian trixie/main amd64 netbase all 6.5 [12.4 kB] #9 8.103 Get:6 http://deb.debian.org/debian trixie/main amd64 readline-common all 8.2-6 [69.4 kB] #9 8.122 Get:7 http://deb.debian.org/debian trixie/main amd64 media-types all 13.0.0 [29.3 kB] #9 8.122 Get:8 http://deb.debian.org/debian trixie/main amd64 libffi8 amd64 3.4.8-2 [24.1 kB] #9 8.122 Get:9 http://deb.debian.org/debian trixie/main amd64 libgpm2 amd64 1.20.7-11+b2 [14.4 kB] #9 8.122 Get:10 http://deb.debian.org/debian trixie/main amd64 libncursesw6 amd64 6.5+20250216-2 [135 kB] #9 8.122 Get:11 http://deb.debian.org/debian trixie/main amd64 libreadline8t64 amd64 8.2-6 [169 kB] #9 8.122 Get:12 http://deb.debian.org/debian trixie/main amd64 libpython3.13-stdlib amd64 3.13.5-2+deb13u2 [1958 kB] #9 8.167 Get:13 http://deb.debian.org/debian trixie/main amd64 python3.13 amd64 3.13.5-2+deb13u2 [757 kB] #9 8.366 perl: warning: Setting locale failed. #9 8.366 perl: warning: Please check that your locale settings: #9 8.366 LANGUAGE = "en_US.UTF-8", #9 8.366 LC_ALL = "en_US.UTF-8", #9 8.366 LC_CTYPE = (unset), #9 8.366 LC_NUMERIC = (unset), #9 8.366 LC_COLLATE = (unset), #9 8.366 LC_TIME = (unset), #9 8.366 LC_MESSAGES = (unset), #9 8.366 LC_MONETARY = (unset), #9 8.366 LC_ADDRESS = (unset), #9 8.366 LC_IDENTIFICATION = (unset), #9 8.366 LC_MEASUREMENT = (unset), #9 8.366 LC_PAPER = (unset), #9 8.366 LC_TELEPHONE = (unset), #9 8.366 LC_NAME = (unset), #9 8.366 LANG = "en_US.UTF-8" #9 8.366 are supported and installed on your system. #9 8.366 perl: warning: Falling back to the standard locale ("C"). #9 11.24 Fetched 6383 kB in 0s (13.8 MB/s) #9 11.45 Selecting previously unselected package libexpat1:amd64. #9 11.45 (Reading database ... (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 5563 files and directories currently installed.) #9 11.45 Preparing to unpack .../libexpat1_2.7.1-2_amd64.deb ... #9 11.56 Unpacking libexpat1:amd64 (2.7.1-2) ... #9 11.65 Selecting previously unselected package libpython3.13-minimal:amd64. #9 11.65 Preparing to unpack .../libpython3.13-minimal_3.13.5-2+deb13u2_amd64.deb ... #9 11.67 Unpacking libpython3.13-minimal:amd64 (3.13.5-2+deb13u2) ... #9 12.04 Selecting previously unselected package python3.13-minimal. #9 12.04 Preparing to unpack .../python3.13-minimal_3.13.5-2+deb13u2_amd64.deb ... #9 12.05 Unpacking python3.13-minimal (3.13.5-2+deb13u2) ... #9 12.51 Setting up libpython3.13-minimal:amd64 (3.13.5-2+deb13u2) ... #9 12.55 Setting up libexpat1:amd64 (2.7.1-2) ... #9 12.57 Setting up python3.13-minimal (3.13.5-2+deb13u2) ... #9 13.58 Selecting previously unselected package python3-minimal. #9 13.58 (Reading database ... (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 5897 files and directories currently installed.) #9 13.60 Preparing to unpack .../0-python3-minimal_3.13.5-1_amd64.deb ... #9 13.62 Unpacking python3-minimal (3.13.5-1) ... #9 13.70 Selecting previously unselected package netbase. #9 13.70 Preparing to unpack .../1-netbase_6.5_all.deb ... #9 13.70 Unpacking netbase (6.5) ... #9 13.77 Selecting previously unselected package readline-common. #9 13.77 Preparing to unpack .../2-readline-common_8.2-6_all.deb ... #9 13.78 Unpacking readline-common (8.2-6) ... #9 13.84 Selecting previously unselected package media-types. #9 13.84 Preparing to unpack .../3-media-types_13.0.0_all.deb ... #9 13.84 Unpacking media-types (13.0.0) ... #9 13.95 Selecting previously unselected package libffi8:amd64. #9 13.95 Preparing to unpack .../4-libffi8_3.4.8-2_amd64.deb ... #9 13.95 Unpacking libffi8:amd64 (3.4.8-2) ... #9 14.06 Selecting previously unselected package libgpm2:amd64. #9 14.06 Preparing to unpack .../5-libgpm2_1.20.7-11+b2_amd64.deb ... #9 14.06 Unpacking libgpm2:amd64 (1.20.7-11+b2) ... #9 14.14 Selecting previously unselected package libncursesw6:amd64. #9 14.14 Preparing to unpack .../6-libncursesw6_6.5+20250216-2_amd64.deb ... #9 14.14 Unpacking libncursesw6:amd64 (6.5+20250216-2) ... #9 14.23 Selecting previously unselected package libreadline8t64:amd64. #9 14.23 Preparing to unpack .../7-libreadline8t64_8.2-6_amd64.deb ... #9 14.31 Adding 'diversion of /lib/x86_64-linux-gnu/libhistory.so.8 to /lib/x86_64-linux-gnu/libhistory.so.8.usr-is-merged by libreadline8t64' #9 14.31 Adding 'diversion of /lib/x86_64-linux-gnu/libhistory.so.8.2 to /lib/x86_64-linux-gnu/libhistory.so.8.2.usr-is-merged by libreadline8t64' #9 14.31 Adding 'diversion of /lib/x86_64-linux-gnu/libreadline.so.8 to /lib/x86_64-linux-gnu/libreadline.so.8.usr-is-merged by libreadline8t64' #9 14.31 Adding 'diversion of /lib/x86_64-linux-gnu/libreadline.so.8.2 to /lib/x86_64-linux-gnu/libreadline.so.8.2.usr-is-merged by libreadline8t64' #9 14.31 Unpacking libreadline8t64:amd64 (8.2-6) ... #9 14.45 Selecting previously unselected package libpython3.13-stdlib:amd64. #9 14.45 Preparing to unpack .../8-libpython3.13-stdlib_3.13.5-2+deb13u2_amd64.deb ... #9 14.46 Unpacking libpython3.13-stdlib:amd64 (3.13.5-2+deb13u2) ... #9 14.83 Selecting previously unselected package python3.13. #9 14.83 Preparing to unpack .../9-python3.13_3.13.5-2+deb13u2_amd64.deb ... #9 14.84 Unpacking python3.13 (3.13.5-2+deb13u2) ... #9 14.92 Setting up media-types (13.0.0) ... #9 15.33 Setting up libgpm2:amd64 (1.20.7-11+b2) ... #9 15.35 Setting up libncursesw6:amd64 (6.5+20250216-2) ... #9 15.40 Setting up libffi8:amd64 (3.4.8-2) ... #9 15.40 Setting up netbase (6.5) ... #9 15.45 Setting up python3-minimal (3.13.5-1) ... #9 15.88 Setting up readline-common (8.2-6) ... #9 15.92 Setting up libreadline8t64:amd64 (8.2-6) ... #9 15.98 Setting up libpython3.13-stdlib:amd64 (3.13.5-2+deb13u2) ... #9 16.03 Setting up python3.13 (3.13.5-2+deb13u2) ... #9 17.44 Processing triggers for libc-bin (2.41-12) ... #9 DONE 18.2s #10 exporting to image #10 exporting layers #10 exporting layers 1.3s done #10 writing image sha256:e96686734b666f966b2255a085279ef2c16669e3bbd85bd8df02eb07863ab117 #10 writing image sha256:e96686734b666f966b2255a085279ef2c16669e3bbd85bd8df02eb07863ab117 0.0s done #10 naming to nexus.gz1.opensdn.io:5101/opensdn-external-haproxy:master-2_8_0_1-6 0.0s done #10 DONE 1.9s 2026-06-02 14:30:02,775: INFO: Docker build duration: 66 seconds The push refers to repository [nexus.gz1.opensdn.io:5101/opensdn-external-haproxy] 6f97d39b93b7: Preparing 6a4afbaceba0: Preparing a695d68e39ad: Preparing b567ea4be8ca: Preparing 5f70bf18a086: Preparing 6041a3f8e882: Preparing 72bc242dd702: Preparing ab42a1a6742d: Preparing 9122132eabc5: Preparing 70a290c5e58b: Preparing 6f97d39b93b7: Waiting 6a4afbaceba0: Waiting a695d68e39ad: Waiting b567ea4be8ca: Waiting 5f70bf18a086: Waiting 6041a3f8e882: Waiting ab42a1a6742d: Waiting 9122132eabc5: Waiting 70a290c5e58b: Waiting 72bc242dd702: Waiting 6a4afbaceba0: Pushed a695d68e39ad: Pushed 5f70bf18a086: Layer already exists 6041a3f8e882: Layer already exists b567ea4be8ca: Pushed 72bc242dd702: Layer already exists ab42a1a6742d: Layer already exists 9122132eabc5: Layer already exists 6f97d39b93b7: Pushed 70a290c5e58b: Pushed master-2_8_0_1-6: digest: sha256:68dbfedc8e0061917035656f94071337abc2bc9a2d8ed252552d87a6ecc2a617 size: 2409 2026-06-02 14:30:15,460: INFO: Building opensdn-external-haproxy finished successfully, duration: 79 seconds WARNING: This output is designed for human readability. For machine-readable output, please use --format. IMAGE ID DISK USAGE CONTENT SIZE EXTRA nexus.gz1.opensdn.io:5101/opensdn-analytics-base:master-2_8_0_1-6 ed3273f5f233 676MB 0B nexus.gz1.opensdn.io:5101/opensdn-analytics-snmp-base:master-2_8_0_1-6 00df2bb030bf 917MB 0B nexus.gz1.opensdn.io:5101/opensdn-ansible-deployer-src:master-2_8_0_1-6 ac737ae44ffb 1.41MB 0B nexus.gz1.opensdn.io:5101/opensdn-base:master-2_8_0_1-6 863ad00f53d6 676MB 0B nexus.gz1.opensdn.io:5101/opensdn-build-manifest-src:master-2_8_0_1-6 5cbb2afec588 4.17kB 0B nexus.gz1.opensdn.io:5101/opensdn-charms-src:master-2_8_0_1-6 86ca559c0d81 6.05MB 0B nexus.gz1.opensdn.io:5101/opensdn-container-builder-src:master-2_8_0_1-6 edd19f4e247c 2.39MB 0B nexus.gz1.opensdn.io:5101/opensdn-controller-config-base:master-2_8_0_1-6 8fb4fac91fc8 676MB 0B nexus.gz1.opensdn.io:5101/opensdn-controller-control-base:master-2_8_0_1-6 1e71d691be9b 735MB 0B nexus.gz1.opensdn.io:5101/opensdn-external-haproxy:master-2_8_0_1-6 e96686734b66 144MB 0B nexus.gz1.opensdn.io:5101/opensdn-external-kafka:master-2_8_0_1-6 bcbfaba5e113 392MB 0B nexus.gz1.opensdn.io:5101/opensdn-external-redis:master-2_8_0_1-6 be671f364fab 171MB 0B nexus.gz1.opensdn.io:5101/opensdn-external-rsyslogd:master-2_8_0_1-6 0afddb7b2241 440MB 0B nexus.gz1.opensdn.io:5101/opensdn-external-stunnel:master-2_8_0_1-6 ee11e6a9b736 454MB 0B nexus.gz1.opensdn.io:5101/opensdn-general-base:master-2_8_0_1-6 5f0ef0397136 428MB 0B nexus.gz1.opensdn.io:5101/opensdn-kolla-ansible-src:master-2_8_0_1-6 b5c0eae8967d 32.7MB 0B nexus.gz1.opensdn.io:5101/opensdn-vrouter-base:master-2_8_0_1-6 83c2e8b8ac34 743MB 0B nexus.gz1.opensdn.io:5101/tf-dev-sandbox:frozen 344a5bac68f8 2.9GB 0B U rockylinux:9 9cc24f05f309 176MB 0B tf-dev-sandbox:compile fce67866e90c 22.2GB 0B tf-dev-sandbox:frozen 344a5bac68f8 2.9GB 0B U