Update docs for new api endpoints
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
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Michael Crosby
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4 changed files with 175 additions and 48 deletions
184
README.md
184
README.md
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@ -2,17 +2,40 @@
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another container runtime
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Start a container:
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#### Status
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*alpha*
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What does alpha, beta, etc mean?
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* alpha - not feature complete
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* beta - feature complete but needs testing
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* prod ready - read for production
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# REST API v1
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## Starting a container
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To start a container hit the `/containers/{name}` endpoint with a `POST` request.
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The checkpoint field is option but allows you to start the container with the specified
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checkpoint name instead of a new instance of the container.
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Example:
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```bash
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curl -XPOST localhost:8888/containers/redis -d '{"bundlePath": "/containers/redis"}'
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curl -XPOST localhost:8888/containers/redis -d '{
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"bundlePath": "/containers/redis",
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"checkpoint: "checkpoint-name"
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}'
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```
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Add a process:
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## Add a process to an existing container
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To add an additional process to a running container send a `PUT` request to the
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`/containers/{name}/processes` endpoint.
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Example:
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```bash
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curl -s -XPUT localhost:8888/containers/redis/process -d@process.json | json_pp
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{
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curl -s -XPUT localhost:8888/containers/redis/process -d '{
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"user" : {
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"gid" : 0,
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"uid" : 0
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@ -26,53 +49,156 @@ curl -s -XPUT localhost:8888/containers/redis/process -d@process.json | json_pp
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"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
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"TERM=xterm"
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]
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}
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}'
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```
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Get containers and state:
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## Signal a specific process in a container
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To send a signal to any of the containers processes send a `POST` request to
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the `/containers/{name}/process/{pid}` endpoint.
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Example
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```bash
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curl -s localhost:8888/state | json_pp
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curl -s -XPOST localhost:8888/containers/redis/process/1234 -d '{"signal": 15}'
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```
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## Get the state of containerd and all of its containers
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To the the entire state of the containerd instance send a `GET` request
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to the `/state` endpoint.
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Example:
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```bash
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curl -s localhost:8888/state
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```
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Response:
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```json
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{
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"containers" : [
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{
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"state" : {
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"status" : "running"
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},
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"bundlePath" : "/containers/redis",
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"id" : "redis",
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"processes" : [
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{
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"args" : [
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"sh",
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"-c",
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"sleep 60"
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"redis-server",
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"--bind",
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"0.0.0.0"
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],
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"user" : {
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"gid" : 0,
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"uid" : 0
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"gid" : 1000,
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"uid" : 1000
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},
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"pid" : 25743,
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"terminal" : false,
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"pid" : 11497,
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"env" : [
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"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
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"TERM=xterm"
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]
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}
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],
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"id" : "redis",
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"state" : {
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"status" : "running"
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},
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"bundlePath" : "/containers/redis"
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}
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]
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}
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],
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"machine" : {
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"cpus" : 4,
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"memory" : 7872909312
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}
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}
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```
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Other stuff:
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## Create a checkpoint for a container
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To create a checkpoint for a container send a `POST` request to the
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`/containers/{name}/checkpoint/{checkpointname}` endpoint. All of the options
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to this endpoint are optional.
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If you send `"exit": true` the container will be stopped after the checkpoint is complete,
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the default is to keep the container running.
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Example:
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```bash
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# pause and resume a container
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curl -XPATCH localhost:8888/containers/redis -d '{"status": "paused"}'
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curl -XPATCH localhost:8888/containers/redis -d '{"status": "running"}'
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# send signal to a container's specific process
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curl -XPOST localhost:8888/containers/redis/process/18306 -d '{"signal": 9}'
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curl -s -XPOST localhost:8888/containers/redis/checkpoint/test1 -d '{
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"exit": false,
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"tcp": false,
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"unixSockets": false,
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"shell": false
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}'
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```
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## List all checkpoints for a container
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To list all checkpoints for a container send a `GET` request to the
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`/containers/{name}/checkpoint` endpoint.
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Example:
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```bash
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curl -s localhost:8888/containers/redis/checkpoint
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```
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Response:
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```json
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[
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{
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"name" : "test1",
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"unixSockets" : false,
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"tcp" : false,
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"shell" : false
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},
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{
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"name" : "test2",
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"tcp" : false,
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"unixSockets" : false,
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"shell" : false
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}
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]
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```
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## Delete a container's checkpoint
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To delete a container's checkpoint send a `DELETE` request to the
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`/containers/redis/checkpoint/{checkpointname}` endpoint.
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Example:
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```bash
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curl -XDELETE -s localhost:8888/containers/redis/checkpoint/test1
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```
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## Update a container
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The update endpoint for a container accepts a JSON object with various fields
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for the actions you with to perform. To update a container send a `PATCH` request
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to the `/containers/{name}` endpoint.
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### Pause and resume a container
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To pause or resume a continer you want to send a `PATCH` request updating the container's state.
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Example:
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```bash
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# pause a container
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curl -XPATCH localhost:8888/containers/redis -d '{"status": "paused"}'
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# resume the container
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curl -XPATCH localhost:8888/containers/redis -d '{"status": "running"}'
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```
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### Signal the main process of a container
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To signal the main process of the container hit the same update endpoint with a different state.
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Example:
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```bash
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curl -s -XPATCH localhost:8888/containers/redis -d '{"signal": 9}'
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```
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@ -20,9 +20,10 @@ type Client struct {
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// Start starts a container with the specified id and path to the container's
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// bundle on the system.
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func (c *Client) Start(id, path string) error {
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func (c *Client) Start(id, path, checkpoint string) error {
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container := Container{
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BundlePath: path,
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Checkpoint: checkpoint,
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}
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buf := bytes.NewBuffer(nil)
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if err := json.NewEncoder(buf).Encode(container); err != nil {
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@ -53,7 +54,7 @@ func (c *Client) Containers() ([]Container, error) {
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return s.Containers, nil
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}
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func (c *Client) Signal(id string, pid, signal int) error {
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func (c *Client) SignalProcess(id string, pid, signal int) error {
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sig := Signal{
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Signal: signal,
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}
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@ -34,7 +34,7 @@ func NewServer(supervisor *containerd.Supervisor) http.Handler {
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r.HandleFunc("/containers/{id:.*}", s.updateContainer).Methods("PATCH")
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// internal method for replaying the journal
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r.HandleFunc("/event", s.event).Methods("POST")
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// r.HandleFunc("/event", s.event).Methods("POST")
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r.HandleFunc("/events", s.events).Methods("GET")
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// containerd handlers
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@ -263,9 +263,9 @@ func (s *server) createContainer(w http.ResponseWriter, r *http.Request) {
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e := containerd.NewEvent(containerd.StartContainerEventType)
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e.ID = id
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e.BundlePath = c.BundlePath
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if c.Checkpoint != nil {
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if c.Checkpoint != "" {
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e.Checkpoint = &runtime.Checkpoint{
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Name: c.Checkpoint.Name,
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Name: c.Checkpoint,
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}
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}
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e.Stdio = &runtime.Stdio{
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@ -29,7 +29,7 @@ type Container struct {
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Stdout string `json:"stdout,omitempty"`
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Stderr string `json:"stderr,omitempty"`
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State *ContainerState `json:"state,omitempty"`
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Checkpoint *Checkpoint `json:"checkpoint,omitempty"`
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Checkpoint string `json:"checkpoint,omitempty"`
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}
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type User struct {
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