Какие-то старые записи по Docker Swarm (устаревшие, позде будут выпилены)

strategy

strategy random

swarm manage token://<token> -H 0.0.0.0:4243 --strategy random &

стартуем 20 контейнеров. Они должны разместить произвольно на хостах.

for i in {1..20}; do /bin/bash -c "docker run -d nginx"; done

удаляем

docker rm -f $(docker ps -aq)

strategy binpacking (default) (в зависимости от памяти хост машины)

убили swarm процесс

swarm manage token://<token> -H 0.0.0.0:4243 --strategy binpacking &

Affinity filter

docker run -d --name c1 -e constraint:node==three nginx
docker run -d --name c2 -e constraint:node==two nginx

docker run -d --name c4 -e affinity:container==c1 nginx
docker run -d --name c5 -e affinity:container!=c1 nginx

Standard Constraints

docker -H two:2375 info

docker run -d --name c1 -e constraint:operatingsystem==Deb* nginx
docker run -d --name c2 -e constraint:operatingsystem==fedora* nginx (Ошибка!)

Custom Constraints

two:

vi /etc/default/docker

DOCKER_OPTS="-H 192.168.56.35:2375 -H unix:///var/run/docker.sock --label zone=dmz --label site=london"

service docker restart
docker -H two:2375 info
(появились label)

three:

vi /etc/default/docker

DOCKER_OPTS="-H 192.168.56.185:2375 -H unix:///var/run/docker.sock --label zone=prod --label site=london"
service docker restart
docker -H three:2375 info

two:

docker run -d --name londprod1 -e constraint:site==london -e constraint:zone==prod nginx
docker ps

docker run -d --name londprod2 -e constraint:site==london -e constraint:zone!=prod nginx
docker ps

Resourse Constraints

docker run -d -p 8080:80 nginx
docker run -d -p 8080:80 nginx
docker run -d -p 8080:80 nginx

на каждом из хостов создаст по контейнеру. Если попытаться выполнить команду 4-й раз получим ошибку, т.к. ресурсов больше нет.


Пример из видео

$ docker-machine create --driver virtualbox dev1

$ eval "$(docker-machine env dev1)"

$ docker pull swarm

$ docker run swarm -v
swarm version 1.1.3 (7e9c6bd)


Create a Cluster

$ sid=$(docker run swarm create)

$ echo $sid
d3af6d950956757646273019a8792b53


Create the Swarm Manager

$ docker-machine create -d virtualbox --swarm --swarm-master --swarm-discovery token://$sid swarm-master

$ docker-machine ls
NAME           ACTIVE   DRIVER       STATE     URL                         SWARM                   DOCKER    ERRORS
swarm-master   -        virtualbox   Running   tcp://192.168.99.100:2376   swarm-master (master)   v1.10.3   


$ eval "$(docker-machine env swarm-master)"

$ docker-machine ls
NAME           ACTIVE   DRIVER       STATE     URL                         SWARM                   DOCKER    ERRORS
swarm-master   *        virtualbox   Running   tcp://192.168.99.100:2376   swarm-master (master)   v1.10.3   


$ docker info


Create Swarm Nodes


$ docker-machine create -d virtualbox --engine-label itype=frontend --swarm --swarm-discovery token://$sid swarm-node-01

$ docker-machine create -d virtualbox --swarm --swarm-discovery token://$sid swarm-node-02

$ docker-machine create -d virtualbox --swarm --swarm-discovery token://$sid swarm-node-03

$ docker-machine ls
NAME            ACTIVE   DRIVER       STATE     URL                         SWARM                   DOCKER    ERRORS
swarm-master    *        virtualbox   Running   tcp://192.168.99.100:2376   swarm-master (master)   v1.10.3   
swarm-node-01   -        virtualbox   Running   tcp://192.168.99.101:2376   swarm-master            v1.10.3   
swarm-node-02   -        virtualbox   Running   tcp://192.168.99.102:2376   swarm-master            v1.10.3   
swarm-node-03   -        virtualbox   Running   tcp://192.168.99.103:2376   swarm-master            v1.10.3   


$ docker-machine env --swarm swarm-master   # (checkout the different port)

export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.99.100:3376"
export DOCKER_CERT_PATH="/home/marley/.docker/machine/machines/swarm-master"
export DOCKER_MACHINE_NAME="swarm-master"
# Run this command to configure your shell:
# eval $(docker-machine env --swarm swarm-master)


$ eval "$(docker-machine env --swarm swarm-master)"

$ docker-machine ls    (Notice non of the docker machines have the asterick)


$ docker info
Containers: 5
Images: 4
Server Version: swarm/1.1.3
Role: primary
Strategy: spread
Filters: health, port, dependency, affinity, constraint
Nodes: 4
 swarm-master: 192.168.99.100:2376
  └ Status: Healthy
  └ Containers: 2
  └ Reserved CPUs: 0 / 1
  └ Reserved Memory: 0 B / 1.021 GiB
  └ Labels: executiondriver=native-0.2, kernelversion=4.1.19-boot2docker, operatingsystem=Boot2Docker 1.10.3 (TCL 6.4.1); master : 625117e - Thu Mar 10 22:09:02 UTC 2016, provider=virtualbox, storagedriver=aufs
  └ Error: (none)
  └ UpdatedAt: 2016-04-09T23:11:51Z
 swarm-node-01: 192.168.99.101:2376
  └ Status: Healthy
  └ Containers: 1
  └ Reserved CPUs: 0 / 1
  └ Reserved Memory: 0 B / 1.021 GiB
  └ Labels: executiondriver=native-0.2, itype=frontend, kernelversion=4.1.19-boot2docker, operatingsystem=Boot2Docker 1.10.3 (TCL 6.4.1); master : 625117e - Thu Mar 10 22:09:02 UTC 2016, provider=virtualbox, storagedriver=aufs
  └ Error: (none)
  └ UpdatedAt: 2016-04-09T23:12:33Z
 swarm-node-02: 192.168.99.102:2376
  └ Status: Healthy
  └ Containers: 1
  └ Reserved CPUs: 0 / 1
  └ Reserved Memory: 0 B / 1.021 GiB
  └ Labels: executiondriver=native-0.2, kernelversion=4.1.19-boot2docker, operatingsystem=Boot2Docker 1.10.3 (TCL 6.4.1); master : 625117e - Thu Mar 10 22:09:02 UTC 2016, provider=virtualbox, storagedriver=aufs
  └ Error: (none)
  └ UpdatedAt: 2016-04-09T23:12:27Z
 swarm-node-03: 192.168.99.103:2376
  └ Status: Healthy
  └ Containers: 1
  └ Reserved CPUs: 0 / 1
  └ Reserved Memory: 0 B / 1.021 GiB
  └ Labels: executiondriver=native-0.2, kernelversion=4.1.19-boot2docker, operatingsystem=Boot2Docker 1.10.3 (TCL 6.4.1); master : 625117e - Thu Mar 10 22:09:02 UTC 2016, provider=virtualbox, storagedriver=aufs
  └ Error: (none)
  └ UpdatedAt: 2016-04-09T23:12:05Z
Kernel Version: 4.1.19-boot2docker
Operating System: linux
CPUs: 4
Total Memory: 4.085 GiB
Name: swarm-master


$ docker run swarm list token://$sid
192.168.99.103:2376
192.168.99.102:2376
192.168.99.101:2376
192.168.99.100:2376


$ docker ps     #(no containers are running in the swarm)


Look at the Four Nodes

$ docker-machine ls

$ eval "$(docker-machine env swarm-master)"


$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
f15c66f10765        swarm:latest        "/swarm join --advert"   17 minutes ago      Up 17 minutes                           swarm-agent
4f81fcef587e        swarm:latest        "/swarm manage --tlsv"   17 minutes ago      Up 17 minutes                           swarm-agent-master


$ eval "$(docker-machine env swarm-node-01)"


$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
8891322a859d        swarm:latest        "/swarm join --advert"   10 minutes ago      Up 10 minutes                           swarm-agent


$ eval "$(docker-machine env swarm-node-02)"

$ docker ps

$ eval "$(docker-machine env swarm-node-03)"

$ docker ps


Running Docker Instances with Swarm (explain Spead vs Binpack

$ eval "$(docker-machine env --swarm swarm-master)"

$ docker ps

$ docker run -itd --name engmgr ubuntu


$ docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
f0c59feb6763        ubuntu              "/bin/bash"         26 seconds ago      Up 23 seconds                           swarm-node-02/engmgr


$ for i in `seq 1 6`; do docker run -itd -e constraint:itype!=frontend --name eng$i ubuntu; done


$ docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
5b762f03d416        ubuntu              "/bin/bash"         9 seconds ago       Up 6 seconds                            swarm-node-03/eng6
f301111c7433        ubuntu              "/bin/bash"         9 seconds ago       Up 7 seconds                            swarm-node-02/eng5
523de40a66fe        ubuntu              "/bin/bash"         10 seconds ago      Up 7 seconds                            swarm-node-03/eng4
3eafa9495a09        ubuntu              "/bin/bash"         10 seconds ago      Up 7 seconds                            swarm-node-02/eng3
07a6c7bde575        ubuntu              "/bin/bash"         11 seconds ago      Up 8 seconds                            swarm-master/eng2
5c64c2a5621c        ubuntu              "/bin/bash"         32 seconds ago      Up 30 seconds                           swarm-node-03/eng1
f0c59feb6763        ubuntu              "/bin/bash"         2 minutes ago       Up 2 minutes                            swarm-node-02/engmgr


$ docker run -itd --name engmgr-c -e affinity:container==engmgr ubuntu


Cleanup

$ docker-machine kill $(docker-machine ls -q)

$ docker-machine rm $(docker-machine ls -q)