公式ウェブサイトの指示に従って docker をインストールしましたが、次のようなエラーが表示されます ( からjournalctl -xe):
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.614348477Z" level=info msg="Starting up"
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.646352167Z" level=info msg="parsed scheme: \"unix\"" module=grpc
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.646395968Z" level=info msg="scheme \"unix\" not registered, fallback to default scheme" module=grpc
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.646438441Z" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock <nil> 0 <nil>}] <nil> <nil>}" module=grpc
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.646482278Z" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.648745422Z" level=info msg="parsed scheme: \"unix\"" module=grpc
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.648780339Z" level=info msg="scheme \"unix\" not registered, fallback to default scheme" module=grpc
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.648824261Z" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock <nil> 0 <nil>}] <nil> <nil>}" module=grpc
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.648847918Z" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.650640781Z" level=error msg="failed to mount overlay: no such device" storage-driver=overlay2
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.652619063Z" level=error msg="AUFS was not found in /proc/filesystems" storage-driver=aufs
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.653285845Z" level=error msg="failed to mount overlay: no such device" storage-driver=overlay
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.678262705Z" level=warning msg="Your kernel does not support oom control"
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.678323247Z" level=warning msg="Your kernel does not support memory swappiness"
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.678339101Z" level=warning msg="Your kernel does not support kernel memory limit"
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.678352245Z" level=warning msg="Your kernel does not support kernel memory TCP limit"
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.678365163Z" level=warning msg="Unable to find cpu cgroup in mounts"
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.678378018Z" level=warning msg="Unable to find cpuset cgroup in mounts"
Sep 12 11:15:16 myhostname dockerd[18504]: time="2021-09-12T11:15:16.678391295Z" level=warning msg="Unable to find pids cgroup in mounts"
Sep 12 11:15:16 myhostname dockerd[18504]: failed to start daemon: Devices cgroup isn't mounted
システム情報:
OS: Centos 7
Kernel Version: 3.10
出力は次のようcat /etc/os-releaseになります。
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"
出力は次のようuname -rになります。
3.10.0-042stab141.3
答え1
「仮想マシン」VPS は実際には VM ではなく、OpenVZ コンテナです。この環境では Docker を実行できません。OpenVZ を使用しない別の VPS を購入してください。