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Replaced intro image with a less stretched version (#9671) 

Signed-off-by: Lena Larionova <lena.larionova@docker.com>
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lena-larionova 2019-10-17 11:44:09 -07:00 committed by GitHub
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@ -76,7 +76,7 @@ deploying applications is.
Containerization is increasingly popular because containers are:
- Flexible: Even the most complex applications can be containerized.
- Lightweight: Containers leverage and share the host kernel,
- Lightweight: Containers leverage and share the host kernel,
making them much more efficient in terms of system resources than virtual machines.
- Portable: You can build locally, deploy to the cloud, and run anywhere.
- Loosely coupled: Containers are highly self sufficient and encapsulated,
@ -85,11 +85,11 @@ Containerization is increasingly popular because containers are:
- Secure: Containers apply aggressive constraints and isolations to processes without
any configuration required on the part of the user.
![Containers are portable](images/laurel-docker-containers.png){:width="100%"}
![Containers are portable](images/laurel-docker-containers2019.jpg){:width="100%"}
### Images and containers
Fundamentally, a container is nothing but a running process,
Fundamentally, a container is nothing but a running process,
with some added encapsulation features applied to it in order to keep it isolated from the host
and from other containers.
One of the most important aspects of container isolation is that each container interacts
@ -160,9 +160,9 @@ Docker Desktop will set up Kubernetes for you quickly and easily. Follow the set
```shell
kubectl get pods
```
```
You should see something like:
You should see something like:
```shell
NAME READY STATUS RESTARTS AGE
@ -173,9 +173,9 @@ Docker Desktop will set up Kubernetes for you quickly and easily. Follow the set
```shell
kubectl logs demo
```
```
You should see the output of a healthy ping process:
You should see the output of a healthy ping process:
```shell
PING 8.8.8.8 (8.8.8.8): 56 data bytes
@ -216,7 +216,7 @@ Docker Desktop will set up Kubernetes for you quickly and easily. Follow the set
- name: testpod
image: alpine:3.5
command: ["ping", "8.8.8.8"]
```
```
This describes a pod with a single container, isolating a simple ping to 8.8.8.8.
@ -230,9 +230,9 @@ Docker Desktop will set up Kubernetes for you quickly and easily. Follow the set
```shell
kubectl get pods
```
```
You should see something like:
You should see something like:
```shell
NAME READY STATUS RESTARTS AGE
@ -243,9 +243,9 @@ Docker Desktop will set up Kubernetes for you quickly and easily. Follow the set
```shell
kubectl logs demo
```
```
You should see the output of a healthy ping process:
You should see the output of a healthy ping process:
```shell
PING 8.8.8.8 (8.8.8.8): 56 data bytes
@ -285,16 +285,16 @@ Docker Desktop runs primarily on Docker Engine, which has everything you need to
```shell
docker swarm init
```
```
If all goes well, you should see a message similar to the following:
If all goes well, you should see a message similar to the following:
```shell
Swarm initialized: current node (tjjggogqpnpj2phbfbz8jd5oq) is now a manager.
Swarm initialized: current node (tjjggogqpnpj2phbfbz8jd5oq) is now a manager.
To add a worker to this swarm, run the following command:
To add a worker to this swarm, run the following command:
docker swarm join --token SWMTKN-1-3e0hh0jd5t4yjg209f4g5qpowbsczfahv2dea9a1ay2l8787cf-2h4ly330d0j917ocvzw30j5x9 192.168.65.3:2377
docker swarm join --token SWMTKN-1-3e0hh0jd5t4yjg209f4g5qpowbsczfahv2dea9a1ay2l8787cf-2h4ly330d0j917ocvzw30j5x9 192.168.65.3:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
```
@ -309,22 +309,22 @@ Docker Desktop runs primarily on Docker Engine, which has everything you need to
```shell
docker service ps demo
```
```
You should see something like:
You should see something like:
```shell
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
463j2s3y4b5o demo.1 alpine:3.5 docker-desktop Running Running 8 seconds ago
463j2s3y4b5o demo.1 alpine:3.5 docker-desktop Running Running 8 seconds ago
```
4. Check that you get the logs you'd expect for a ping process:
```shell
docker service logs demo
```
```
You should see the output of a healthy ping process:
You should see the output of a healthy ping process:
```shell
demo.1.463j2s3y4b5o@docker-desktop | PING 8.8.8.8 (8.8.8.8): 56 data bytes
@ -353,16 +353,16 @@ Docker Desktop runs primarily on Docker Engine, which has everything you need to
```shell
docker swarm init
```
```
If all goes well, you should see a message similar to the following:
If all goes well, you should see a message similar to the following:
```shell
Swarm initialized: current node (tjjggogqpnpj2phbfbz8jd5oq) is now a manager.
Swarm initialized: current node (tjjggogqpnpj2phbfbz8jd5oq) is now a manager.
To add a worker to this swarm, run the following command:
To add a worker to this swarm, run the following command:
docker swarm join --token SWMTKN-1-3e0hh0jd5t4yjg209f4g5qpowbsczfahv2dea9a1ay2l8787cf-2h4ly330d0j917ocvzw30j5x9 192.168.65.3:2377
docker swarm join --token SWMTKN-1-3e0hh0jd5t4yjg209f4g5qpowbsczfahv2dea9a1ay2l8787cf-2h4ly330d0j917ocvzw30j5x9 192.168.65.3:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
```
@ -377,22 +377,22 @@ Docker Desktop runs primarily on Docker Engine, which has everything you need to
```shell
docker service ps demo
```
```
You should see something like:
You should see something like:
```shell
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
463j2s3y4b5o demo.1 alpine:3.5 docker-desktop Running Running 8 seconds ago
463j2s3y4b5o demo.1 alpine:3.5 docker-desktop Running Running 8 seconds ago
```
4. Check that you get the logs you'd expect for a ping process:
4. Check that you get the logs you'd expect for a ping process:
```shell
docker service logs demo
```
```
You should see the output of a healthy ping process:
You should see the output of a healthy ping process:
```shell
demo.1.463j2s3y4b5o@docker-desktop | PING 8.8.8.8 (8.8.8.8): 56 data bytes