mirror of https://github.com/docker/cli.git
Use "sudo" for dockerd examples
Because we standardize on using a non-privileged prompt (`$`) instead of `#`, replacing the examples to use `sudo` instead to indicate this has to be run as root. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn
Tibor Vass
parent
e3279502d0
commit
36ffab578f
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@ -123,26 +123,32 @@ find examples of using Systemd socket activation with Docker and Systemd in the
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You can configure the Docker daemon to listen to multiple sockets at the same
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time using multiple `-H` options:
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```bash
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# listen using the default unix socket, and on 2 specific IP addresses on this host.
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dockerd -H unix:///var/run/docker.sock -H tcp://192.168.59.106 -H tcp://10.10.10.2
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$ sudo dockerd -H unix:///var/run/docker.sock -H tcp://192.168.59.106 -H tcp://10.10.10.2
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```
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The Docker client will honor the `DOCKER_HOST` environment variable to set the
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`-H` flag for the client.
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```bash
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$ docker -H tcp://0.0.0.0:2375 ps
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# or
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$ export DOCKER_HOST="tcp://0.0.0.0:2375"
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$ docker ps
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# both are equal
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```
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Setting the `DOCKER_TLS_VERIFY` environment variable to any value other than
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the empty string is equivalent to setting the `--tlsverify` flag. The following
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are equivalent:
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```bash
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$ docker --tlsverify ps
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# or
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$ export DOCKER_TLS_VERIFY=1
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$ docker ps
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```
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The Docker client will honor the `HTTP_PROXY`, `HTTPS_PROXY`, and `NO_PROXY`
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environment variables (or the lowercase versions thereof). `HTTPS_PROXY` takes
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@ -188,27 +194,31 @@ For example:
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`-H`, when empty, will default to the same value as
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when no `-H` was passed in.
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`-H` also accepts short form for TCP bindings:
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`host:` or `host:port` or `:port`
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`-H` also accepts short form for TCP bindings: `host:` or `host:port` or `:port`
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Run Docker in daemon mode:
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```bash
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$ sudo <path to>/dockerd -H 0.0.0.0:5555 &
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```
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Download an `ubuntu` image:
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```bash
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$ docker -H :5555 pull ubuntu
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```
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You can use multiple `-H`, for example, if you want to listen on both
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TCP and a Unix socket
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```bash
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# Run docker in daemon mode
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$ sudo <path to>/dockerd -H tcp://127.0.0.1:2375 -H unix:///var/run/docker.sock &
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# Download an ubuntu image, use default Unix socket
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$ docker pull ubuntu
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# OR use the TCP port
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$ docker -H tcp://127.0.0.1:2375 pull ubuntu
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```
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### Daemon storage-driver option
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@ -293,8 +303,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd \
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--storage-opt dm.thinpooldev=/dev/mapper/thin-pool
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```bash
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$ sudo dockerd --storage-opt dm.thinpooldev=/dev/mapper/thin-pool
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```
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* `dm.basesize`
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@ -310,7 +321,10 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd --storage-opt dm.basesize=50G
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```bash
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$ sudo dockerd --storage-opt dm.basesize=50G
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```
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This will increase the base device size to 50G. The Docker daemon will throw an
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error if existing base device size is larger than 50G. A user can use
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@ -320,13 +334,17 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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that may already be initialized and inherited by pulled images. Typically,
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a change to this value requires additional steps to take effect:
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```bash
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$ sudo service docker stop
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$ sudo rm -rf /var/lib/docker
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$ sudo service docker start
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```
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Example use:
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$ dockerd --storage-opt dm.basesize=20G
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```bash
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$ sudo dockerd --storage-opt dm.basesize=20G
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```
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* `dm.loopdatasize`
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@ -341,7 +359,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd --storage-opt dm.loopdatasize=200G
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```bash
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$ sudo dockerd --storage-opt dm.loopdatasize=200G
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```
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* `dm.loopmetadatasize`
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@ -356,7 +376,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd --storage-opt dm.loopmetadatasize=4G
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```bash
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$ sudo dockerd --storage-opt dm.loopmetadatasize=4G
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```
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* `dm.fs`
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@ -365,7 +387,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd --storage-opt dm.fs=ext4
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```bash
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$ sudo dockerd --storage-opt dm.fs=ext4
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```
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* `dm.mkfsarg`
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@ -373,7 +397,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd --storage-opt "dm.mkfsarg=-O ^has_journal"
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```bash
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$ sudo dockerd --storage-opt "dm.mkfsarg=-O ^has_journal"
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```
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* `dm.mountopt`
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@ -381,7 +407,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd --storage-opt dm.mountopt=nodiscard
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```bash
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$ sudo dockerd --storage-opt dm.mountopt=nodiscard
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```
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* `dm.datadev`
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@ -395,9 +423,11 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd \
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```bash
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$ sudo dockerd \
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--storage-opt dm.datadev=/dev/sdb1 \
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--storage-opt dm.metadatadev=/dev/sdc1
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```
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* `dm.metadatadev`
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@ -411,13 +441,17 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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If setting up a new metadata pool it is required to be valid. This can be
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achieved by zeroing the first 4k to indicate empty metadata, like this:
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```bash
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$ dd if=/dev/zero of=$metadata_dev bs=4096 count=1
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```
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Example use:
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$ dockerd \
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```bash
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$ sudo dockerd \
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--storage-opt dm.datadev=/dev/sdb1 \
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--storage-opt dm.metadatadev=/dev/sdc1
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```
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* `dm.blocksize`
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@ -426,7 +460,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd --storage-opt dm.blocksize=512K
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```bash
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$ sudo dockerd --storage-opt dm.blocksize=512K
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```
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* `dm.blkdiscard`
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@ -440,7 +476,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd --storage-opt dm.blkdiscard=false
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```bash
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$ sudo dockerd --storage-opt dm.blkdiscard=false
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```
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* `dm.override_udev_sync_check`
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@ -450,10 +488,12 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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To view the `udev` sync support of a Docker daemon that is using the
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`devicemapper` driver, run:
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```bash
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$ docker info
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[...]
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Udev Sync Supported: true
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[...]
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```
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When `udev` sync support is `true`, then `devicemapper` and udev can
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coordinate the activation and deactivation of devices for containers.
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@ -466,7 +506,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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To allow the `docker` daemon to start, regardless of `udev` sync not being
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supported, set `dm.override_udev_sync_check` to true:
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$ dockerd --storage-opt dm.override_udev_sync_check=true
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```bash
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$ sudo dockerd --storage-opt dm.override_udev_sync_check=true
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```
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When this value is `true`, the `devicemapper` continues and simply warns
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you the errors are happening.
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@ -496,7 +538,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd --storage-opt dm.use_deferred_removal=true
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```bash
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$ sudo dockerd --storage-opt dm.use_deferred_removal=true
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```
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* `dm.use_deferred_deletion`
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@ -510,9 +554,11 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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To avoid this failure, enable both deferred device deletion and deferred
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device removal on the daemon.
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$ dockerd \
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```bash
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$ sudo dockerd \
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--storage-opt dm.use_deferred_deletion=true \
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--storage-opt dm.use_deferred_removal=true
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```
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With these two options enabled, if a device is busy when the driver is
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deleting a container, the driver marks the device as deleted. Later, when
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@ -549,7 +595,7 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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```bash
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$ dockerd --storage-opt dm.min_free_space=10%
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$ sudo dockerd --storage-opt dm.min_free_space=10%
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```
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* `dm.xfs_nospace_max_retries`
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@ -565,7 +611,7 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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```bash
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$ dockerd --storage-opt dm.xfs_nospace_max_retries=0
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$ sudo dockerd --storage-opt dm.xfs_nospace_max_retries=0
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```
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#### ZFS options
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@ -578,7 +624,9 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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$ dockerd -s zfs --storage-opt zfs.fsname=zroot/docker
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```bash
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$ sudo dockerd -s zfs --storage-opt zfs.fsname=zroot/docker
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```
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#### Btrfs options
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@ -590,7 +638,10 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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**size** cannot be smaller than **btrfs.min_space**.
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Example use:
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$ dockerd -s btrfs --storage-opt btrfs.min_space=10G
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```bash
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$ sudo dockerd -s btrfs --storage-opt btrfs.min_space=10G
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```
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#### Overlay2 options
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@ -615,7 +666,7 @@ control `containerd` startup, manually start `containerd` and pass the path to
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the `containerd` socket using the `--containerd` flag. For example:
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```bash
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$ dockerd --containerd /var/run/dev/docker-containerd.sock
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$ sudo dockerd --containerd /var/run/dev/docker-containerd.sock
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```
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Runtimes can be registered with the daemon either via the
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@ -639,9 +690,11 @@ The following is an example adding 2 runtimes via the configuration:
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This is the same example via the command line:
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```bash
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$ sudo dockerd --add-runtime runc=runc --add-runtime custom=/usr/local/bin/my-runc-replacement
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```
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**Note**: defining runtime arguments via the command line is not supported.
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> **Note**: defining runtime arguments via the command line is not supported.
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## Options for the runtime
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@ -656,14 +709,18 @@ cgroups. You can specify only specify `cgroupfs` or `systemd`. If you specify
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This example sets the `cgroupdriver` to `systemd`:
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```bash
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$ sudo dockerd --exec-opt native.cgroupdriver=systemd
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```
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Setting this option applies to all containers the daemon launches.
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Also Windows Container makes use of `--exec-opt` for special purpose. Docker user
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can specify default container isolation technology with this, for example:
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$ dockerd --exec-opt isolation=hyperv
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```bash
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$ sudo dockerd --exec-opt isolation=hyperv
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```
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Will make `hyperv` the default isolation technology on Windows. If no isolation
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value is specified on daemon start, on Windows client, the default is
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@ -671,11 +728,19 @@ value is specified on daemon start, on Windows client, the default is
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## Daemon DNS options
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To set the DNS server for all Docker containers, use
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`dockerd --dns 8.8.8.8`.
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To set the DNS server for all Docker containers, use:
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```bash
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$ sudo dockerd --dns 8.8.8.8
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```
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To set the DNS search domain for all Docker containers, use:
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```bash
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$ sudo dockerd --dns-search example.com
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```
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To set the DNS search domain for all Docker containers, use
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`dockerd --dns-search example.com`.
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## Insecure registries
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@ -770,7 +835,7 @@ using the `--cluster-store-opt` flag, specifying the paths to PEM encoded
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files. For example:
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```bash
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dockerd \
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$ sudo dockerd \
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--cluster-advertise 192.168.1.2:2376 \
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--cluster-store etcd://192.168.1.2:2379 \
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--cluster-store-opt kv.cacertfile=/path/to/ca.pem \
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@ -820,7 +885,7 @@ authorization plugins when you start the Docker `daemon` using the
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`--authorization-plugin=PLUGIN_ID` option.
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```bash
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dockerd --authorization-plugin=plugin1 --authorization-plugin=plugin2,...
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$ sudo dockerd --authorization-plugin=plugin1 --authorization-plugin=plugin2,...
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```
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||||
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The `PLUGIN_ID` value is either the plugin's name or a path to its specification
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@ -891,10 +956,10 @@ startup will fail with an error message.
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> *before* the `--userns-remap` option is enabled. Once these files exist, the
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> daemon can be (re)started and range assignment on user creation works properly.
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*Example: starting with default Docker user management:*
|
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**Example: starting with default Docker user management:**
|
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```bash
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$ dockerd --userns-remap=default
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$ sudo dockerd --userns-remap=default
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```
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When `default` is provided, Docker will create - or find the existing - user and group
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@ -1237,7 +1302,7 @@ The `--tls*` options enable use of specific certificates for individual daemons.
|
|||
Example script for a separate “bootstrap” instance of the Docker daemon without network:
|
||||
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```bash
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||||
$ dockerd \
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||||
$ sudo dockerd \
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||||
-H unix:///var/run/docker-bootstrap.sock \
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||||
-p /var/run/docker-bootstrap.pid \
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--iptables=false \
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|||
Loading…
Reference in New Issue