docker inspect -f '{{.Name}} - {{.NetworkSettings.IPAddress }}' $(docker ps -aq)
在109機器上下載registry鏡像css
docker pull registry
下載完以後咱們經過該鏡像啓動一個容器python
docker run -d -p 5000:5000 registry
默認狀況下,會將倉庫存放於容器內的/tmp/registry目錄下,這樣若是容器被刪除,則存放於容器中的鏡像也會丟失,因此咱們通常狀況下會指定本地一個目錄掛載到容器內的/tmp/registry下,nginx
不過具體的狀況仍是要到容器裏去看web
先啓動容器docker
docker run -d -p 5000:5000 -v /opt/data/registry:/tmp/registry registry b4c21ca8cf8a23ea72e0471909742541ffc312ea5cf492486b5bdc3130179864
能夠看到容器存放位置不在/tmp 下express
咱們接着來查找下,掛載位置到底在哪裏json
能夠看到registry 掛載目錄是 在 /var/lib/registry 下vim
咱們從新啓動下 registrycentos
docker run -d -p 5000:5000 -v /opt/data/registry:/var/lib/registry -v /data/config.yml:/etc/docker/registry/config.yml registry
/data/config.yml 這個是什麼呢?咱們在下面刪除倉庫鏡像介紹服務器
這裏須要說明一點,在啓動倉庫時,需在配置文件中的storage配置中增長delete=true配置項,容許刪除鏡像。默認的鏡像是沒有這個參數
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cat config.yml
version:
0.1
log:
fields:
service: registry
storage:
delete:
enabled: true
cache:
blobdescriptor: inmemory
filesystem:
rootdirectory: /var/lib/registry
http:
addr: :
5000
headers:
X-Content-Type-Options: [nosniff]
health:
storagedriver:
enabled: true
interval:
10
s
threshold:
3
|
能夠看到咱們啓動了一個容器,地址爲:192.168.0.109:5000。
接下來咱們就要操做把一個本地鏡像push到私有倉庫中。首先在109機器下pull一個比較小的鏡像來測試(此處使用的是busybox)。
docker pull centos
接下來修改一下該鏡像的tag。
docker tag busybox 192.168.0.109:5000/centos
接下來把打了tag的鏡像上傳到私有倉庫。
docker push 192.168.0.109:5000/centos
能夠看到 push 失敗:
Error: Invalid registry endpoint https://192.168.0.109:5000/v1/: Get https://192.168.0.109:5000/v1/_ping: dial tcp 192.168.0.109:5000: connection refused. If this private registry supports only HTTP or HTTPS with an unknown CA certificate, please add `--insecure-registry 192.168.112.136:5000` to the daemon's arguments. In the case of HTTPS, if you have access to the registry's CA certificate, no need for the flag; simply place the CA certificate at /etc/docker/certs.d/192.168.0.109:5000/ca.crt
由於Docker從1.3.X以後,與docker registry交互默認使用的是https,然而此處搭建的私有倉庫只提供http服務,因此當與私有倉庫交互時就會報上面的錯誤。爲了解決這個問題須要在啓動docker server時增長啓動參數爲默認使用http訪問。修改docker啓動配置文件:
vim /usr/lib/systemd/system/docker.service
找到 ExecStart
ExecStart=... --insecure-registry 192.168.0.109:5000 \
重啓docker:
systemctl daemon-reload systemctl restart docker
重啓完以後咱們再次運行推送命令,把本地鏡像推送到私有服務器上。
docker push 192.168.0.109:5000/centos
接下來咱們從私有倉庫中pull下來該鏡像。
sudo docker pull 192.168.0.109:5000/centos
查看鏡像
# curl -XGET http://registry:5000/v2/_catalog # curl -XGET http://registry:5000/v2/image_name/tags/list
Docker倉庫在2.1版本中支持了刪除鏡像的API,但這個刪除操做只會刪除鏡像元數據,不會刪除層數據。在2.4版本中對這一問題進行了解決,增長了一個垃圾回收命令,刪除未被引用的層數據
打包上傳鏡像
[root@master scripts]# docker tag alpine:v1 192.168.0.109:5000/fbgweb:v1 [root@master scripts]# docker push 192.168.0.109:5000/fbgweb:v1 The push refers to a repository [192.168.0.109:5000/fbgweb] e30c8796115a: Pushed 9922d8737f34: Pushed c3cc0aba53da: Pushed f73b42f6c905: Pushed 4a3fe911d00f: Pushed 187a385eda60: Pushed 0e23c00d0c30: Pushed d221a7f5318b: Pushed 7e2d3752fd4f: Pushed v1: digest: sha256:6a67ba482a8dd4f8143ac96b1dcffa5e45af95b8d3e37aeba72401a5afd7ab8e size: 2204
查看倉庫鏡像 (get.py須要安裝模塊)
pip 安裝:
首先安裝epel擴展源: yum -y install epel-release 更新完成以後,就可安裝pip: yum -y install python-pip 安裝完成以後清除cache: yum clean all
request模塊安裝:
pip install request
#!/usr/bin/env python #-*- coding:utf-8 -*- import requests import json import traceback repo_ip = '192.168.0.109' repo_port = 5000 def getImagesNames(repo_ip,repo_port): docker_images = [] try: url = "http://" + repo_ip + ":" +str(repo_port) + "/v2/_catalog" res =requests.get(url).content.strip() res_dic = json.loads(res) images_type = res_dic['repositories'] for i in images_type: url2 = "http://" + repo_ip + ":" +str(repo_port) +"/v2/" + str(i) + "/tags/list" res2 =requests.get(url2).content.strip() res_dic2 = json.loads(res2) name = res_dic2['name'] tags = res_dic2['tags'] for tag in tags: docker_name = str(repo_ip) + ":" + str(repo_port) + "/" + name + ":" + tag docker_images.append(docker_name) print docker_name except: traceback.print_exc() return docker_images a=getImagesNames(repo_ip, repo_port) #print a
[root@master scripts]# python get.py 192.168.0.109:5000/fbgweb:v1 192.168.0.109:5000/nginx:1.7.9 192.168.0.109:5000/nginx:1.8
查看數據進行倉庫容器中,經過du命令查看大小
[root@master ~]# docker exec -it f70d0c79e6d546d4 sh ~ # du -chs /var/lib/registry/ 182.4M /var/lib/registry/ 182.4M total
刪除鏡像
刪除鏡像對應的API以下:
DELETE /v2/<name>/manifests/<reference>
name:鏡像名稱
reference: 鏡像對應sha256值
發送請求,刪除剛纔上傳的鏡像
[root@master scripts]# curl -I -X DELETE http://192.168.0.109:5000/v2/fbgweb/manifests/sha256:6a67ba482a8dd4f8143ac96b1dcffa5e45af95b8d3e37aeba72401a5afd7ab8e HTTP/1.1 202 Accepted Docker-Distribution-Api-Version: registry/2.0 X-Content-Type-Options: nosniff Date: Mon, 13 Nov 2017 13:04:24 GMT Content-Length: 0 Content-Type: text/plain; charset=utf-8
查看鏡像
[root@master scripts]# python get.py 192.168.0.109:5000/nginx:1.7.9 192.168.0.109:5000/nginx:1.8 192.168.0.109:5000/nginx:latest
能夠看到鏡像索引已經被刪除
查看數據大小
[root@master ~]# docker exec -it f70d0c79e6d546d4 sh ~ # du -chs /var/lib/registry/ 182.4M /var/lib/registry/ 182.4M total
能夠看到數據大小沒有變化(只刪除了元數據)
垃圾回收
進行容器執行垃圾回收命令
~ # registry garbage-collect /etc/docker/registry/config.yml 31 blobs marked, 5 blobs eligible for deletion blob eligible for deletion: sha256:5e7cf06c8745d0985f94191c60aad8b87371c8a674162525bff0efccdb805931 INFO[0000] Deleting blob: /docker/registry/v2/blobs/sha256/5e/5e7cf06c8745d0985f94191c60aad8b87371c8a674162525bff0efccdb805931 go.version=go1.7.6 instance.id=c38f4c35-9914-4b77-a59f-ea584137fae0 blob eligible for deletion: sha256:6a67ba482a8dd4f8143ac96b1dcffa5e45af95b8d3e37aeba72401a5afd7ab8e INFO[0000] Deleting blob: /docker/registry/v2/blobs/sha256/6a/6a67ba482a8dd4f8143ac96b1dcffa5e45af95b8d3e37aeba72401a5afd7ab8e go.version=go1.7.6 instance.id=c38f4c35-9914-4b77-a59f-ea584137fae0 blob eligible for deletion: sha256:966e2fb5980b2a854c03551418af0b2ee2bef082dfaae075026d00fa36620960 INFO[0000] Deleting blob: /docker/registry/v2/blobs/sha256/96/966e2fb5980b2a854c03551418af0b2ee2bef082dfaae075026d00fa36620960 go.version=go1.7.6 instance.id=c38f4c35-9914-4b77-a59f-ea584137fae0 blob eligible for deletion: sha256:a122ad1ef7a033582abfc7bae980cc11bdcc2d19bed7d8ea5b7efc50d16456c8 INFO[0000] Deleting blob: /docker/registry/v2/blobs/sha256/a1/a122ad1ef7a033582abfc7bae980cc11bdcc2d19bed7d8ea5b7efc50d16456c8 go.version=go1.7.6 instance.id=c38f4c35-9914-4b77-a59f-ea584137fae0 blob eligible for deletion: sha256:b29205236f1d3eb6143e95f3a412a8f21a16a10b09c7aee28ecba3d803832285 INFO[0000] Deleting blob: /docker/registry/v2/blobs/sha256/b2/b29205236f1d3eb6143e95f3a412a8f21a16a10b09c7aee28ecba3d803832285 go.version=go1.7.6 instance.id=c38f4c35-9914-4b77-a59f-ea584137fae0
查看數據大小
~ # du -chs /var/lib/registry/ 159.5M /var/lib/registry/ 159.5M total
能夠看到鏡像數據已被刪除