
本記事の目的
以下の記事で紹介したOracle Real Application Clusters構築を通じて学ぶことが出来るdockerコマンドに関するメモです。
[Oracle Database] 公式Docker Imageを利用してOracle Database 19cのRAC環境を構築してみた
※随時追加予定
利用するdockerコマンドと実行例
コンテナ確認(起動中のみ表示)
docker ps
[opc@vmrac ~]$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
⇒コンテナが一つも起動していない状態
コンテナ確認(停止中のも表示)
docker ps -a
[opc@vmrac ~]$ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 194d76ced9d1 oracle/database-rac:19.3.0 "/usr/sbin/oracleinit" 23 hours ago Exited (137) 23 hours ago racnode2 3f118092e1e4 oracle/database-rac:19.3.0 "/usr/sbin/oracleinit" 25 hours ago Exited (137) 23 hours ago racnode1
⇒racnode1, racnode2という2つのコンテナが登録されている。
コンテナ起動
docker start コンテナ名
[opc@vmrac ~]$ docker start racnode1 racnode1
コンテナ起動ログ確認
docker logs -f コンテナ名
⇒-fつけることで、出力結果を追うことが出来る。別端末で表示がお奨め。
コンテナで任意のコマンド実行
docker exec -i -t コンテナ名 コマンド名
[opc@vmrac ~]$ docker exec -it racnode1 bash [grid@racnode1 ~]$
⇒racnode1コンテナへbashで接続
コンテナ停止
docker stop コンテナ名
[opc@vmrac ~]$ docker stop racnode1 racnode1
コンテナ削除
docker rm コンテナ名
[opc@vmrac ~]$ docker rm racnode1 racnode1
⇒起動中のコンテナは削除できないので注意。
※Oracle DatabaseのRAC用コンテナがうまく起動できないような場合、以下の流れで調査&再実行するのがお奨め。
docker logs -fで原因調査⇒docker stop ⇒ docker rm ⇒ 設定変更など ⇒ docker create ⇒ docker start
コンテナ・ネットワーク確認
docker network ls
[opc@vmrac ~]$ docker network ls NETWORK ID NAME DRIVER SCOPE 4592073d1baf bridge bridge local ce79ea8ecd5c host host local a7bb4b46ee65 none null local 5ae65f8b3fec rac_priv1_nw bridge local 8541f11a258b rac_pub1_nw bridge local
コンテナ作成
docker create
[opc@vmrac ~]$ docker create --help Usage: docker create [OPTIONS] IMAGE [COMMAND] [ARG...] Create a new container Options: --add-host list Add a custom host-to-IP mapping (host:ip) -a, --attach list Attach to STDIN, STDOUT or STDERR --blkio-weight uint16 Block IO (relative weight), between 10 and 1000, or 0 to disable (default 0) --blkio-weight-device list Block IO weight (relative device weight) (default []) --cap-add list Add Linux capabilities --cap-drop list Drop Linux capabilities --cgroup-parent string Optional parent cgroup for the container --cidfile string Write the container ID to the file --cpu-period int Limit CPU CFS (Completely Fair Scheduler) period --cpu-quota int Limit CPU CFS (Completely Fair Scheduler) quota --cpu-rt-period int Limit CPU real-time period in microseconds --cpu-rt-runtime int Limit CPU real-time runtime in microseconds -c, --cpu-shares int CPU shares (relative weight) --cpus decimal Number of CPUs --cpuset-cpus string CPUs in which to allow execution (0-3, 0,1) --cpuset-mems string MEMs in which to allow execution (0-3, 0,1) --device list Add a host device to the container --device-cgroup-rule list Add a rule to the cgroup allowed devices list --device-read-bps list Limit read rate (bytes per second) from a device (default []) --device-read-iops list Limit read rate (IO per second) from a device (default []) --device-write-bps list Limit write rate (bytes per second) to a device (default []) --device-write-iops list Limit write rate (IO per second) to a device (default []) --disable-content-trust Skip image verification (default true) --dns list Set custom DNS servers --dns-option list Set DNS options --dns-search list Set custom DNS search domains --domainname string Container NIS domain name --entrypoint string Overwrite the default ENTRYPOINT of the image -e, --env list Set environment variables --env-file list Read in a file of environment variables --expose list Expose a port or a range of ports --gpus gpu-request GPU devices to add to the container ('all' to pass all GPUs) --group-add list Add additional groups to join --health-cmd string Command to run to check health --health-interval duration Time between running the check (ms|s|m|h) (default 0s) --health-retries int Consecutive failures needed to report unhealthy --health-start-period duration Start period for the container to initialize before starting health-retries countdown (ms|s|m|h) (default 0s) --health-timeout duration Maximum time to allow one check to run (ms|s|m|h) (default 0s) --help Print usage -h, --hostname string Container host name --init Run an init inside the container that forwards signals and reaps processes -i, --interactive Keep STDIN open even if not attached --ip string IPv4 address (e.g., 172.30.100.104) --ip6 string IPv6 address (e.g., 2001:db8::33) --ipc string IPC mode to use --isolation string Container isolation technology --kernel-memory bytes Kernel memory limit -l, --label list Set meta data on a container --label-file list Read in a line delimited file of labels --link list Add link to another container --link-local-ip list Container IPv4/IPv6 link-local addresses --log-driver string Logging driver for the container --log-opt list Log driver options --mac-address string Container MAC address (e.g., 92:d0:c6:0a:29:33) -m, --memory bytes Memory limit --memory-reservation bytes Memory soft limit --memory-swap bytes Swap limit equal to memory plus swap: '-1' to enable unlimited swap --memory-swappiness int Tune container memory swappiness (0 to 100) (default -1) --mount mount Attach a filesystem mount to the container --name string Assign a name to the container --network network Connect a container to a network --network-alias list Add network-scoped alias for the container --no-healthcheck Disable any container-specified HEALTHCHECK --oom-kill-disable Disable OOM Killer --oom-score-adj int Tune host's OOM preferences (-1000 to 1000) --pid string PID namespace to use --pids-limit int Tune container pids limit (set -1 for unlimited) --platform string Set platform if server is multi-platform capable --privileged Give extended privileges to this container -p, --publish list Publish a container's port(s) to the host -P, --publish-all Publish all exposed ports to random ports --read-only Mount the container's root filesystem as read only --restart string Restart policy to apply when a container exits (default "no") --rm Automatically remove the container when it exits --runtime string Runtime to use for this container --security-opt list Security Options --shm-size bytes Size of /dev/shm --stop-signal string Signal to stop a container (default "SIGTERM") --stop-timeout int Timeout (in seconds) to stop a container --storage-opt list Storage driver options for the container --sysctl map Sysctl options (default map[]) --tmpfs list Mount a tmpfs directory -t, --tty Allocate a pseudo-TTY --ulimit ulimit Ulimit options (default []) -u, --user string Username or UID (format: <name|uid>[:<group|gid>]) --userns string User namespace to use --uts string UTS namespace to use -v, --volume list Bind mount a volume --volume-driver string Optional volume driver for the container --volumes-from list Mount volumes from the specified container(s) -w, --workdir string Working directory inside the container
その他
コンテナ・ボリューム確認
docker volume ls
[opc@vmrac ~]$ docker volume ls DRIVER VOLUME NAME local 85ae59745b3873d6c0834f63e41567ed66e8ba651a218bd3252fa2dcca77d593 local 959705331a085d6296fec22bf3d084f09f33d888a1757da43f6dae6eea43464c
コンテナ・ボリューム削除
docker volume prune
⇒Remove all unused local volumes、つまり停止中のコンテナに必要なボリュームも削除対象となるので実行時は要注意!
コンテナ定義の確認
docker inspect コンテナ名
docker network inspect コンテナ・ネットワーク名
docker volume inspect コンテナ・ボリューム名
ヘルプ
docker –help
とりあえずヘルプ見ておけばOK
参考情報
入門者にお奨めと評判のDocker本↓
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