3、爲了使 DNS 主機名解析更容易一些，我在每個 Pi 設備上設置了本地主機名，如下所示：
/etc/hosts
192.168.3.15 raspberrypi4b
192.168.3.12 raspberrypi3b
4、在每個 Pi 上，安裝以下內容：
a.安裝以下先決條件。
sudo apt-get install apt-transport-https ca-certificates software-properties-common -y
b.下載並安裝 Docker。
curl -fsSL get.docker.com -o get-docker.sh && sh get-docker.sh
c.讓“pi”用戶能夠運行 Docker。
sudo usermod -aG docker pi
d.導入 Docker CPG 密鑰。
sudo curl https://download.docker.com/linux/raspbian/gpg
e.設置 Docker Repo。
sudo nano /etc/apt/sources.list
f.添加以下行並保存：
deb https://download.docker.com/linux/raspbian/ stretch stable
g.爲您的 Pi 打補丁以及更新。
sudo apt-get update
sudo apt-get upgrade
h.啓動Docker服務。
pi@raspberrypi:~ $ systemctl start docker.service
==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
Authentication is required to start 'docker.service'.
Multiple identities can be used for authentication:
1. ,,, (pi)
2. root
Choose identity to authenticate as (1-2): 1
Password:
==== AUTHENTICATION COMPLETE ===
i.驗證Docker是否已安裝並正在運行。
pi@raspberrypi:~ $ sudo docker info
Client:
Debug Mode: false
Server:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 0
Server Version: 19.03.8
Storage Driver: overlay2
Backing Filesystem: <unknown>
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 7ad184331fa3e55e52b890ea95e65ba581ae3429
runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd
init version: fec3683
Security Options:
seccomp
Profile: default
Kernel Version: 4.19.97-v7+
Operating System: Raspbian GNU/Linux 10 (buster)
OSType: linux
Architecture: armv7l
CPUs: 4
Total Memory: 926.1MiB
Name: raspberrypi
ID: 6T4Z:LLNQ:RFCA:O2DM:ZRJN:37WV:2CD2:S7VQ:ZOFO:542W:VDVR:7TGP
Docker Root Dir: /var/lib/docker
Debug Mode: false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
WARNING: No swap limit support
WARNING: No cpu cfs quota support
WARNING: No cpu cfs period support
pi@raspberrypi:~ $
5、在將成爲主節點的其中一個 Pi上，輸入以下內容：
pi@raspberrypi:~ $ sudo docker swarm init
Swarm initialized: current node (ejdkwikkr02rnslhc6glcwntl) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join --token SWMTKN-1-4d89i9lou2z3y59pmtch64ritf4hcf1osx22cs9lzzhvgh2lbr-ai4gucauseougfb2wg2emb8an 192.168.3.15:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
6，主節點運行
pi@raspberrypi:~ $ sudo docker swarm join-token manager
To add a manager to this swarm, run the following command:
docker swarm join --token SWMTKN-1-4d89i9lou2z3y59pmtch64ritf4hcf1osx22cs9lzzhvgh2lbr-9bp5qt9gv9oiiuqhvbvzrjb65 192.168.3.15:2377
從節點運行
pi@raspberrypi:~ $ sudo docker swarm join --token SWMTKN-1-4d89i9lou2z3y59pmtch64ritf4hcf1osx22cs9lzzhvgh2lbr-9bp5qt9gv9oiiuqhvbvzrjb65 192.168.3.15:2377
This node joined a swarm as a manager.
添加可視化管理時遇到問題及解決方法
pi@raspberrypi:~ $ docker pull dockersamples/visualizer:latest
Error response from daemon: Get https://registry-1.docker.io/v2/: net/http: TLS handshake timeout
pi@raspberrypi:~ $ sudo docker pull dockersamples/visualizer:latest
sudo: unable to resolve host raspberrypi: Name or service not known
Error response from daemon: Get https://registry-1.docker.io/v2/: net/http: TLS handshake timeout
pi@raspberrypi:~ $ docker pull dockersamples/visualizer:latest
Error response from daemon: Get https://registry-1.docker.io/v2/dockersamples/visualizer/manifests/latest: Get https://auth.docker.io/token?scope=repository%3Adockersamples%2Fvisualizer%3Apull&service=registry.docker.io: net/http: TLS handshake timeout
pi@raspberrypi:~ $ su root
Password:
su: Authentication failure
pi@raspberrypi:~ $ sudo passwd
sudo: unable to resolve host raspberrypi: Name or service not known
New password:
Retype new password:
Sorry, passwords do not match.
passwd: Authentication token manipulation error
passwd: password unchanged
pi@raspberrypi:~ $ sudo passwd root
sudo: unable to resolve host raspberrypi: Name or service not known
New password:
Retype new password:
passwd: password updated successfully
pi@raspberrypi:~ $ su root
Password:
root@raspberrypi:/home/pi# ls
Desktop Documents Downloads get-docker.sh MagPi Music Pictures Public Templates Videos
root@raspberrypi:/home/pi# cd /etc/docker/
root@raspberrypi:/etc/docker# ls
key.json
root@raspberrypi:/etc/docker# node daemon.json
bash: node: command not found
root@raspberrypi:/etc/docker# nano daemon.json
root@raspberrypi:/etc/docker# systemctl daemon-reload
root@raspberrypi:/etc/docker# systemctl restart docker
root@raspberrypi:/etc/docker# quit
bash: quit: command not found
root@raspberrypi:/etc/docker# exit
exit
pi@raspberrypi:~ $ docker pull dockersamples/visualizer:latest
latest: Pulling from dockersamples/visualizer
cd784148e348: Downloading
f6268ae5d1d7: Download complete
97eb9028b14b: Download complete
9975a7a2a3d1: Download complete
ba903e5e6801: Download complete
7f034edb1086: Download complete
cd5dbf77b483: Download complete
5e7311667ddb: Download complete
687c1072bfcb: Download complete
aa18e5d3472c: Download complete
a3da1957bd6b: Download complete
e42dbf1c67c4: Download complete
5a18b01011d2: Download complete
latest: Pulling from dockersamples/visualizer
cd784148e348: Downloading [========> ] 375.2kB/2.207MB
f6268ae5d1d7: Pulling fs layer
97eb9028b14b: Pulling fs layer
9975a7a2a3d1: Waiting
ba903e5e6801: Waiting
7f034edb1086: Waiting
cd5dbf77b483: Waiting
5e7311667ddb: Waiting
687c1072bfcb: Waiting
aa18e5d3472c: Waiting
a3da1957bd6b: Waiting
e42dbf1c67c4: Waiting
5a18b01011d2: Waiting
error pulling image configuration: Get https://registry-1.docker.io/v2/dockersamples/visualizer/blobs/sha256:f6411ebd974c39915c08af35b2bc8c35ea2df531a2cbfce1b9938d1e6ec09d88: net/http: TLS handshake timeout
pi@raspberrypi:~ $ docker service create \
> --name=viz\
> --publish=9090:8080/tcp \
> --constraint=node.role==manager \
> --mount=type=bind,src=/var/run/docker.sock,dst=/var/run/docker.sock \
> alexellis2/visualizer-arm:latest
Error response from daemon: rpc error: code = InvalidArgument desc = name must be valid as a DNS name component
pi@raspberrypi:~ $