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This flags enables full support of daemonless containers in docker. It ensures that docker does not stop containers on shutdown or restore and properly reconnects to the container when restarted. This is not the default because of backwards compat but should be the desired outcome for people running containers in prod. Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
88 lines
5.2 KiB
Go
88 lines
5.2 KiB
Go
// +build linux freebsd
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package daemon
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import (
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"net"
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"github.com/docker/docker/opts"
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flag "github.com/docker/docker/pkg/mflag"
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runconfigopts "github.com/docker/docker/runconfig/opts"
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"github.com/docker/go-units"
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)
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var (
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defaultPidFile = "/var/run/docker.pid"
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defaultGraph = "/var/lib/docker"
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defaultExecRoot = "/var/run/docker"
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)
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// Config defines the configuration of a docker daemon.
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// It includes json tags to deserialize configuration from a file
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// using the same names that the flags in the command line uses.
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type Config struct {
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CommonConfig
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// Fields below here are platform specific.
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CgroupParent string `json:"cgroup-parent,omitempty"`
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ContainerdAddr string `json:"containerd,omitempty"`
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EnableSelinuxSupport bool `json:"selinux-enabled,omitempty"`
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ExecRoot string `json:"exec-root,omitempty"`
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RemappedRoot string `json:"userns-remap,omitempty"`
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Ulimits map[string]*units.Ulimit `json:"default-ulimits,omitempty"`
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}
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// bridgeConfig stores all the bridge driver specific
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// configuration.
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type bridgeConfig struct {
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commonBridgeConfig
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// Fields below here are platform specific.
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EnableIPv6 bool `json:"ipv6,omitempty"`
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EnableIPTables bool `json:"iptables,omitempty"`
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EnableIPForward bool `json:"ip-forward,omitempty"`
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EnableIPMasq bool `json:"ip-masq,omitempty"`
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EnableUserlandProxy bool `json:"userland-proxy,omitempty"`
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DefaultIP net.IP `json:"ip,omitempty"`
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IP string `json:"bip,omitempty"`
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FixedCIDRv6 string `json:"fixed-cidr-v6,omitempty"`
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DefaultGatewayIPv4 net.IP `json:"default-gateway,omitempty"`
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DefaultGatewayIPv6 net.IP `json:"default-gateway-v6,omitempty"`
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InterContainerCommunication bool `json:"icc,omitempty"`
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}
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// InstallFlags adds command-line options to the top-level flag parser for
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// the current process.
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// Subsequent calls to `flag.Parse` will populate config with values parsed
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// from the command-line.
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func (config *Config) InstallFlags(cmd *flag.FlagSet, usageFn func(string) string) {
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// First handle install flags which are consistent cross-platform
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config.InstallCommonFlags(cmd, usageFn)
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// Then platform-specific install flags
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cmd.BoolVar(&config.EnableSelinuxSupport, []string{"-selinux-enabled"}, false, usageFn("Enable selinux support"))
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cmd.StringVar(&config.SocketGroup, []string{"G", "-group"}, "docker", usageFn("Group for the unix socket"))
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config.Ulimits = make(map[string]*units.Ulimit)
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cmd.Var(runconfigopts.NewUlimitOpt(&config.Ulimits), []string{"-default-ulimit"}, usageFn("Set default ulimits for containers"))
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cmd.BoolVar(&config.bridgeConfig.EnableIPTables, []string{"#iptables", "-iptables"}, true, usageFn("Enable addition of iptables rules"))
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cmd.BoolVar(&config.bridgeConfig.EnableIPForward, []string{"#ip-forward", "-ip-forward"}, true, usageFn("Enable net.ipv4.ip_forward"))
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cmd.BoolVar(&config.bridgeConfig.EnableIPMasq, []string{"-ip-masq"}, true, usageFn("Enable IP masquerading"))
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cmd.BoolVar(&config.bridgeConfig.EnableIPv6, []string{"-ipv6"}, false, usageFn("Enable IPv6 networking"))
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cmd.StringVar(&config.ExecRoot, []string{"-exec-root"}, defaultExecRoot, usageFn("Root directory for execution state files"))
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cmd.StringVar(&config.bridgeConfig.IP, []string{"#bip", "-bip"}, "", usageFn("Specify network bridge IP"))
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cmd.StringVar(&config.bridgeConfig.Iface, []string{"b", "-bridge"}, "", usageFn("Attach containers to a network bridge"))
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cmd.StringVar(&config.bridgeConfig.FixedCIDR, []string{"-fixed-cidr"}, "", usageFn("IPv4 subnet for fixed IPs"))
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cmd.StringVar(&config.bridgeConfig.FixedCIDRv6, []string{"-fixed-cidr-v6"}, "", usageFn("IPv6 subnet for fixed IPs"))
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cmd.Var(opts.NewIPOpt(&config.bridgeConfig.DefaultGatewayIPv4, ""), []string{"-default-gateway"}, usageFn("Container default gateway IPv4 address"))
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cmd.Var(opts.NewIPOpt(&config.bridgeConfig.DefaultGatewayIPv6, ""), []string{"-default-gateway-v6"}, usageFn("Container default gateway IPv6 address"))
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cmd.BoolVar(&config.bridgeConfig.InterContainerCommunication, []string{"#icc", "-icc"}, true, usageFn("Enable inter-container communication"))
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cmd.Var(opts.NewIPOpt(&config.bridgeConfig.DefaultIP, "0.0.0.0"), []string{"#ip", "-ip"}, usageFn("Default IP when binding container ports"))
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cmd.BoolVar(&config.bridgeConfig.EnableUserlandProxy, []string{"-userland-proxy"}, true, usageFn("Use userland proxy for loopback traffic"))
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cmd.BoolVar(&config.EnableCors, []string{"#api-enable-cors", "#-api-enable-cors"}, false, usageFn("Enable CORS headers in the remote API, this is deprecated by --api-cors-header"))
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cmd.StringVar(&config.CgroupParent, []string{"-cgroup-parent"}, "", usageFn("Set parent cgroup for all containers"))
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cmd.StringVar(&config.RemappedRoot, []string{"-userns-remap"}, "", usageFn("User/Group setting for user namespaces"))
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cmd.StringVar(&config.ContainerdAddr, []string{"-containerd"}, "", usageFn("Path to containerd socket"))
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cmd.BoolVar(&config.LiveRestore, []string{"-live-restore"}, false, usageFn("Enable live restore of docker when containers are still running"))
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config.attachExperimentalFlags(cmd, usageFn)
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}
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