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ruanbekker/my-docker-cheatsheet.md

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  1. ruanbekker revised this gist Apr 13, 2019. 1 changed file with 62 additions and 0 deletions.
    62 changes: 62 additions & 0 deletions my-docker-cheatsheet.md
    View file
    Original file line number Diff line number Diff line change
    @@ -107,5 +107,67 @@ $ docker inspect --format='{{json .Config.Labels}}' 8d1d11640453
    {"CREATOR":"ruan","OWNER":"ruan"}
    ```

    ## Remove Nodes from the Swarm:

    List all nodes:

    ```
    docker node ls
    ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
    15o0v5mn1002chs8o4kynwk2h * docker-node-1 Ready Active Leader 18.03.1-ce
    68p870mlaxkdy8lih4obtoitw docker-node-2 Ready Active Reachable 18.03.1-ce
    yl4mxlksbp2hzkdczq5kv73ws docker-node-3 Ready Drain Reachable 18.03.1-ce
    ```

    View service thats running on node-2:

    ```
    docker service ps finances_firefly-fe
    ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
    d6qg08l59w4q finances_firefly-fe.1 jc5x/firefly-iii:release-4.7.6 docker-node-2 Running Running 3 months ago
    ```

    Drain node-2:

    ```
    docker node update --availability drain docker-node-2
    docker-node-2
    ```

    List nodes:

    ```
    docker node ls
    ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
    15o0v5mn1002chs8o4kynwk2h * docker-node-1 Ready Active Leader 18.03.1-ce
    68p870mlaxkdy8lih4obtoitw docker-node-2 Ready Drain Reachable 18.03.1-ce
    yl4mxlksbp2hzkdczq5kv73ws docker-node-3 Ready Drain Reachable 18.03.1-ce
    ```

    View the service again:

    ```
    docker service ps finances_firefly-fe
    ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
    zr8r7g9x3cw4 finances_firefly-fe.1 jc5x/firefly-iii:release-4.7.6 docker-node-1 Running Running 40 seconds ago
    ```

    Since the other nodes were managers, demote them first:

    ```
    docker node demote docker-node-2
    Manager docker-node-2 demoted in the swarm.
    docker node demote docker-node-3
    Manager docker-node-3 demoted in the swarm.
    ```

    Then remove them:

    ```
    docker node rm docker-node-2
    docker node rm docker-node-3
    ```

    Resources:
    - http://container-solutions.com/docker-inspect-template-magic/
  2. ruanbekker revised this gist Jan 10, 2019. 1 changed file with 19 additions and 0 deletions.
    19 changes: 19 additions & 0 deletions my-docker-cheatsheet.md
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    Original file line number Diff line number Diff line change
    @@ -88,5 +88,24 @@ $ docker ps --filter name=eng-gringotts-api --format '{{.Names}}'
    my-app-api_my-service-api.1.qz23ls235fai23iz234zdn1v
    ```

    Inspect Lables:

    ```bash Dockerfile
    FROM alpine:edge
    ARG OWNER=none
    LABEL CREATOR=ruan OWNER=$OWNER
    ENV DEV=ruan ENV=prod
    cmd ["ping localhost"]
    ```

    ```bash
    $ docker build -t ruan:test --build-arg OWNER=ruan .
    ```

    ```bash
    $ docker inspect --format='{{json .Config.Labels}}' 8d1d11640453
    {"CREATOR":"ruan","OWNER":"ruan"}
    ```

    Resources:
    - http://container-solutions.com/docker-inspect-template-magic/
  3. ruanbekker revised this gist Aug 29, 2018. 1 changed file with 20 additions and 0 deletions.
    20 changes: 20 additions & 0 deletions my-docker-cheatsheet.md
    View file
    Original file line number Diff line number Diff line change
    @@ -68,5 +68,25 @@ $ docker service inspect my-service -f '{{index .Spec.TaskTemplate.LogDriver.Opt
    https://endpoint.sumologic.com/receiver/...
    ```

    Getting the Swarm Service and Task Name by inspecting the container:

    ```
    $ docker inspect abc123def --format '{{index .Config.Labels "com.docker.swarm.task.name"}}'
    my-app-ui.1.209jdwldi38jd
    $ docker inspect abc123def --format '{{index .Config.Labels "com.docker.swarm.node.id"}}'
    2093123jahas3d3
    $ docker inspect abc123def --format '{{index .Config.Labels "com.docker.swarm.service.name"}}'
    my-app-ui
    ```

    Filter by Container Name and Format by Name:

    ```
    $ docker ps --filter name=eng-gringotts-api --format '{{.Names}}'
    my-app-api_my-service-api.1.qz23ls235fai23iz234zdn1v
    ```

    Resources:
    - http://container-solutions.com/docker-inspect-template-magic/
  4. ruanbekker revised this gist Aug 11, 2018. 1 changed file with 6 additions and 0 deletions.
    6 changes: 6 additions & 0 deletions my-docker-cheatsheet.md
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    @@ -17,6 +17,12 @@ The nocopy modifier is for when you are creating a volume and data already exist
    nocopy: true
    ```

    ## Create a NFS Volume:

    ```
    docker volume create --driver local --opt type=nfs --opt o=addr=192.168.0.115,rw --opt device=:/opt/nfs --name mongodb_data
    ```

    # Docker Swarm

    ## Inspect
  5. ruanbekker revised this gist Aug 11, 2018. 1 changed file with 15 additions and 0 deletions.
    15 changes: 15 additions & 0 deletions my-docker-cheatsheet.md
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    @@ -2,6 +2,21 @@

    # Docker

    # Docker Volumes

    - `nocopy`

    The nocopy modifier is for when you are creating a volume and data already exists in the container's path, you can specify if you want that data copied when the volume is created.

    ```
    volumes:
    - type: volume
    source: minio_config
    target: /root
    volume:
    nocopy: true
    ```

    # Docker Swarm

    ## Inspect
  6. ruanbekker revised this gist May 31, 2018. 1 changed file with 35 additions and 1 deletion.
    36 changes: 35 additions & 1 deletion my-docker-cheatsheet.md
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    @@ -6,11 +6,45 @@

    ## Inspect

    Inspect the Service:

    ```
    $ docker service inspect my-service
    [
    {
    "ID": "abcdef",
    "Version": {
    "Index": 123
    },
    "CreatedAt": "2018-05-30T00:00:00.452848973Z",
    "UpdatedAt": "2018-05-30T00:00:00.457986437Z",
    "Spec": {
    "Name": "my-service",
    "TaskTemplate": {
    "ContainerSpec": {
    ...
    "LogDriver": {
    "Name": "sumologic",
    "Options": {
    "sumo-compress": "false",
    "sumo-sending-frequency": "500ms",
    "sumo-url": "https://endpoint.sumologic.com/receiver/..."
    }
    ...
    ```

    Inspect the LogDriver:

    ```bash
    $ docker service inspect my-service --format='{{.Spec.TaskTemplate.LogDriver}}'
    {sumologic map[sumo-compress:false sumo-sending-frequency:500ms sumo-url:https://endpointsumologic.com/receiver/v1/http/foobar]}
    {sumologic map[sumo-compress:false sumo-sending-frequency:500ms sumo-url:https://endpointsumologic.com/receiver/...]}
    ```

    Getting only the `sumo-url` value:

    ```
    $ docker service inspect my-service -f '{{index .Spec.TaskTemplate.LogDriver.Options "sumo-url"}}'
    https://endpoint.sumologic.com/receiver/...
    ```

    Resources:
  7. ruanbekker created this gist May 30, 2018.
    17 changes: 17 additions & 0 deletions my-docker-cheatsheet.md
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    @@ -0,0 +1,17 @@
    :WIP:

    # Docker

    # Docker Swarm

    ## Inspect

    Inspect the LogDriver:

    ```bash
    $ docker service inspect my-service --format='{{.Spec.TaskTemplate.LogDriver}}'
    {sumologic map[sumo-compress:false sumo-sending-frequency:500ms sumo-url:https://endpointsumologic.com/receiver/v1/http/foobar]}
    ```

    Resources:
    - http://container-solutions.com/docker-inspect-template-magic/