mirror of
https://github.com/opencontainers/runc.git
synced 2026-07-10 21:53:57 +08:00
50105de1d8
As reported in [1], in a case where read-only fuse (sshfs) mount
is used as a volume without specifying ro flag, the kernel fails
to remount it (when adding various flags such as nosuid and nodev),
returning EPERM.
Here's the relevant strace line:
> [pid 333966] mount("/tmp/bats-run-PRVfWc/runc.RbNv8g/bundle/mnt", "/proc/self/fd/7", 0xc0001e9164, MS_NOSUID|MS_NODEV|MS_REMOUNT|MS_BIND|MS_REC, NULL) = -1 EPERM (Operation not permitted)
I was not able to reproduce it with other read-only mounts as the source
(tried tmpfs, read-only bind mount, and an ext2 mount), so somehow this
might be specific to fuse.
The fix is to check whether the source has RDONLY flag, and retry the
remount with this flag added.
A test case (which was kind of hard to write) is added, and it fails
without the fix. Note that rootless user need to be able to ssh to
rootless@localhost in order to sshfs to work -- amend setup scripts
to make it work, and skip the test if the setup is not working.
[1] https://github.com/containers/podman/issues/12205
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
159 lines
5.3 KiB
YAML
159 lines
5.3 KiB
YAML
---
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# We use Cirrus for Vagrant tests and native CentOS 7 and 8, because macOS
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# instances of GHA are too slow and flaky, and Linux instances of GHA do not
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# support KVM.
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# NOTE Cirrus execution environments lack a terminal, needed for
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# some integration tests. So we use `ssh -tt` command to fake a terminal.
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task:
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timeout_in: 30m
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env:
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DEBIAN_FRONTEND: noninteractive
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HOME: /root
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# yamllint disable rule:key-duplicates
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matrix:
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DISTRO: fedora
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name: vagrant DISTRO:$DISTRO
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compute_engine_instance:
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image_project: cirrus-images
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image: family/docker-kvm
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platform: linux
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nested_virtualization: true
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# CPU limit: `16 / NTASK`: see https://cirrus-ci.org/faq/#are-there-any-limits
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cpu: 8
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# Memory limit: `4GB * NCPU`
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memory: 32G
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host_info_script: |
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uname -a
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echo "-----"
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cat /etc/os-release
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echo "-----"
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cat /proc/cpuinfo
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echo "-----"
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df -T
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install_libvirt_vagrant_script: |
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apt-get update
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apt-get install -y libvirt-daemon libvirt-daemon-system vagrant vagrant-libvirt
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systemctl enable --now libvirtd
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vagrant_cache:
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fingerprint_script: uname -s ; cat Vagrantfile.$DISTRO
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folder: /root/.vagrant.d
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vagrant_up_script: |
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ln -sf Vagrantfile.$DISTRO Vagrantfile
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# Retry if it fails (download.fedoraproject.org returns 404 sometimes)
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vagrant up --no-tty || vagrant up --no-tty
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mkdir -p -m 0700 /root/.ssh
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vagrant ssh-config >> /root/.ssh/config
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guest_info_script: |
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ssh default 'sh -exc "uname -a && systemctl --version && df -T && cat /etc/os-release"'
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unit_tests_script: |
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ssh default 'sudo -i make -C /vagrant localunittest'
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integration_systemd_script: |
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ssh -tt default "sudo -i make -C /vagrant localintegration RUNC_USE_SYSTEMD=yes"
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integration_fs_script: |
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ssh -tt default "sudo -i make -C /vagrant localintegration"
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integration_systemd_rootless_script: |
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ssh -tt default "sudo -i make -C /vagrant localrootlessintegration RUNC_USE_SYSTEMD=yes"
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integration_fs_rootless_script: |
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ssh -tt default "sudo -i make -C /vagrant localrootlessintegration"
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task:
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timeout_in: 30m
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env:
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HOME: /root
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CIRRUS_WORKING_DIR: /home/runc
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GO_VERSION: "1.17.3"
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BATS_VERSION: "v1.3.0"
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# yamllint disable rule:key-duplicates
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matrix:
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DISTRO: centos-7
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DISTRO: centos-stream-8
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name: ci / $DISTRO
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compute_engine_instance:
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image_project: centos-cloud
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image: family/$DISTRO
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platform: linux
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cpu: 4
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memory: 8G
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install_dependencies_script: |
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case $DISTRO in
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centos-7)
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(cd /etc/yum.repos.d && curl -O https://copr.fedorainfracloud.org/coprs/adrian/criu-el7/repo/epel-7/adrian-criu-el7-epel-7.repo)
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# sysctl
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echo "user.max_user_namespaces=15076" > /etc/sysctl.d/userns.conf
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sysctl --system
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;;
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centos-stream-8)
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yum config-manager --set-enabled powertools # for glibc-static
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;;
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esac
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# Work around dnf mirror failures by retrying a few times.
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for i in $(seq 0 2); do
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sleep $i
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yum install -y -q gcc git iptables jq glibc-static libseccomp-devel make criu fuse-sshfs && break
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done
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[ $? -eq 0 ] # fail if yum failed
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# install Go
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curl -fsSL "https://dl.google.com/go/go${GO_VERSION}.linux-amd64.tar.gz" | tar Cxz /usr/local
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# install bats
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cd /tmp
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git clone https://github.com/bats-core/bats-core
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cd bats-core
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git checkout $BATS_VERSION
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./install.sh /usr/local
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cd -
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# Add a user for rootless tests
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useradd -u2000 -m -d/home/rootless -s/bin/bash rootless
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# Allow root and rootless itself to execute `ssh rootless@localhost` in tests/rootless.sh
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ssh-keygen -t ecdsa -N "" -f /root/rootless.key
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mkdir -m 0700 -p /home/rootless/.ssh
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cp /root/rootless.key /home/rootless/.ssh/id_ecdsa
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cat /root/rootless.key.pub >> /home/rootless/.ssh/authorized_keys
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chown -R rootless.rootless /home/rootless
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# set PATH
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echo 'export PATH=/usr/local/go/bin:/usr/local/bin:$PATH' >> /root/.bashrc
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# Setup ssh localhost for terminal emulation (script -e did not work)
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ssh-keygen -t ed25519 -f /root/.ssh/id_ed25519 -N ""
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cat /root/.ssh/id_ed25519.pub >> /root/.ssh/authorized_keys
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chmod 400 /root/.ssh/authorized_keys
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ssh-keyscan localhost >> /root/.ssh/known_hosts
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echo -e "Host localhost\n\tStrictHostKeyChecking no\t\nIdentityFile /root/.ssh/id_ed25519\n" >> /root/.ssh/config
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sed -e "s,PermitRootLogin.*,PermitRootLogin prohibit-password,g" -i /etc/ssh/sshd_config
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systemctl restart sshd
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host_info_script: |
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uname -a
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echo "-----"
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cat /etc/os-release
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echo "-----"
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cat /proc/cpuinfo
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echo "-----"
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df -T
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echo "-----"
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systemctl --version
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unit_tests_script: |
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ssh -tt localhost "make -C /home/runc localunittest"
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integration_systemd_script: |
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ssh -tt localhost "make -C /home/runc localintegration RUNC_USE_SYSTEMD=yes"
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integration_fs_script: |
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ssh -tt localhost "make -C /home/runc localintegration"
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integration_systemd_rootless_script: |
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echo "SKIP: integration_systemd_rootless_script requires cgroup v2"
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integration_fs_rootless_script: |
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case $DISTRO in
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centos-7)
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echo "SKIP: FIXME: integration_fs_rootless_script is skipped because of EPERM on writing cgroup.procs"
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;;
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centos-stream-8)
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ssh -tt localhost "make -C /home/runc localrootlessintegration"
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;;
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esac
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