假设我有一个基于ubuntu:latest的普通容器。现在有一个安全更新和ubuntu:latest更新在docker repo。
我如何知道我的本地映像及其容器运行落后? 是否有一些最佳实践来自动更新本地映像和容器来跟踪docker回购更新，这在实践中会给你同样的好处，让无人值守的升级运行在传统的ubuntu机器上
当前回答
这里有很多答案，但没有一个符合我的需要。我想知道提问者第一个问题的确切答案。如何知道hub.docker.com上的图像何时更新?
下面的脚本可以每天运行。在第一次运行时，它从HUB注册中心获得标记的基线和更新日期，并将它们保存在本地。从那时起，每次运行它都会检查注册表中的新标记和更新日期。因为每当有新图像存在时，它都会改变，所以它会告诉我们基本图像是否发生了变化。以下是剧本:
#!/bin/bash
DATAPATH='/data/docker/updater/data'
if [ ! -d "${DATAPATH}" ]; then
mkdir "${DATAPATH}";
fi
IMAGES=$(docker ps --format "{{.Image}}")
for IMAGE in $IMAGES; do
ORIGIMAGE=${IMAGE}
if [[ "$IMAGE" != *\/* ]]; then
IMAGE=library/${IMAGE}
fi
IMAGE=${IMAGE%%:*}
echo "Checking ${IMAGE}"
PARSED=${IMAGE//\//.}
if [ ! -f "${DATAPATH}/${PARSED}" ]; then
# File doesn't exist yet, make baseline
echo "Setting baseline for ${IMAGE}"
curl -s "https://registry.hub.docker.com/v2/repositories/${IMAGE}/tags/" > "${DATAPATH}/${PARSED}"
else
# File does exist, do a compare
NEW=$(curl -s "https://registry.hub.docker.com/v2/repositories/${IMAGE}/tags/")
OLD=$(cat "${DATAPATH}/${PARSED}")
if [[ "${VAR1}" == "${VAR2}" ]]; then
echo "Image ${IMAGE} is up to date";
else
echo ${NEW} > "${DATAPATH}/${PARSED}"
echo "Image ${IMAGE} needs to be updated";
H=`hostname`
ssh -i /data/keys/<KEYFILE> <USER>@<REMOTEHOST>.com "{ echo \"MAIL FROM: root@${H}\"; echo \"RCPT TO: <USER>@<EMAILHOST>.com\"; echo \"DATA\"; echo \"Subject: ${H} - ${IMAGE} needs update\"; echo \"\"; echo -e \"\n${IMAGE} needs update.\n\ndocker pull ${ORIGIMAGE}\"; echo \"\"; echo \".\"; echo \"quit\"; sleep 1; } | telnet <SMTPHOST> 25"
fi
fi
done;
您可能需要更改顶部的DATAPATH变量，并更改末尾的电子邮件通知命令以满足您的需要。对我来说，我把它SSH到我的SMTP所在的另一个网络上的服务器上。但是您也可以轻松地使用邮件命令。
现在，您还需要检查容器本身中是否有更新的包。这实际上可能比在容器工作后“拉”更有效。以下是实现这一目标的脚本:
#!/bin/bash
function needsUpdates() {
RESULT=$(docker exec ${1} bash -c ' \
if [[ -f /etc/apt/sources.list ]]; then \
grep security /etc/apt/sources.list > /tmp/security.list; \
apt-get update > /dev/null; \
apt-get upgrade -oDir::Etc::Sourcelist=/tmp/security.list -s; \
fi; \
')
RESULT=$(echo $RESULT)
GOODRESULT="Reading package lists... Building dependency tree... Reading state information... Calculating upgrade... 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded."
if [[ "${RESULT}" != "" ]] && [[ "${RESULT}" != "${GOODRESULT}" ]]; then
return 0
else
return 1
fi
}
function sendEmail() {
echo "Container ${1} needs security updates";
H=`hostname`
ssh -i /data/keys/<KEYFILE> <USRER>@<REMOTEHOST>.com "{ echo \"MAIL FROM: root@${H}\"; echo \"RCPT TO: <USER>@<EMAILHOST>.com\"; echo \"DATA\"; echo \"Subject: ${H} - ${1} container needs security update\"; echo \"\"; echo -e \"\n${1} container needs update.\n\n\"; echo -e \"docker exec ${1} bash -c 'grep security /etc/apt/sources.list > /tmp/security.list; apt-get update > /dev/null; apt-get upgrade -oDir::Etc::Sourcelist=/tmp/security.list -s'\n\n\"; echo \"Remove the -s to run the update\"; echo \"\"; echo \".\"; echo \"quit\"; sleep 1; } | telnet <SMTPHOST> 25"
}
CONTAINERS=$(docker ps --format "{{.Names}}")
for CONTAINER in $CONTAINERS; do
echo "Checking ${CONTAINER}"
if needsUpdates $CONTAINER; then
sendEmail $CONTAINER
fi
done
其他回答
更新:使用Dependabot - https://dependabot.com/docker/
BLUF:找到正确的插入点来监视容器的更改是一个挑战。如果DockerHub能解决这个问题，那就太好了。(存储库链接已经提到过，但注意在DockerHub上设置它们时-“每当在DockerHub上更新基本映像时，都会在此存储库中触发一个构建。只适用于非官方图片。”)
当我自己尝试解决这个问题时，我看到了几个webhook的建议，所以我想详细说明我使用过的几个解决方案。
Use microbadger.com to track changes in a container and use it's notification webhook feature to trigger an action. I set this up with zapier.com (but you can use any customizable webhook service) to create a new issue in my github repository that uses Alpine as a base image. Pros: You can review the changes reported by microbadger in github before taking action. Cons: Microbadger doesn't let you track a specific tag. Looks like it only tracks 'latest'. Track the RSS feed for git commits to an upstream container. ex. https://github.com/gliderlabs/docker-alpine/commits/rootfs/library-3.8/x86_64. I used zapier.com to monitor this feed and to trigger an automatic build of my container in Travis-CI anytime something is committed. This is a little extreme but you can change the trigger to do other things like open an issue in your git repository for manual intervention. Pros: Closer to an automated pipline. The Travis-CI build just checks to see if your container has issues with whatever was committed to the base image repository. It's up to you if your CI service takes any further action. Cons: Tracking the commit feed isn't perfect. Lots of things get committed to the repository that don't affect the build of the base image. Doesn't take in to account any issues with frequency/number of commits and any API throttling.
我也遇到过同样的问题，我认为可以通过cron作业每天调用无人值机升级来简单解决。
我的意图是将其作为一种自动和快速的解决方案，以确保生产容器是安全和更新的，因为更新映像和部署具有最新安全更新的新docker映像需要花费一些时间。
也可以使用Github钩子自动化映像的构建和部署
我已经创建了一个基本的docker映像，每天自动检查和安装安全更新(可以通过docker run itech/docker- unattentedupgrade直接运行)。
我还发现了另一种检查容器是否需要更新的方法。
我的完整实现:
Dockerfile
FROM ubuntu:14.04
RUN apt-get update \
&& apt-get install -y supervisor unattended-upgrades \
&& rm -rf /var/lib/apt/lists/*
COPY install /install
RUN chmod 755 install
RUN /install
COPY start /start
RUN chmod 755 /start
辅助脚本
安装
#!/bin/bash
set -e
cat > /etc/supervisor/conf.d/cron.conf <<EOF
[program:cron]
priority=20
directory=/tmp
command=/usr/sbin/cron -f
user=root
autostart=true
autorestart=true
stdout_logfile=/var/log/supervisor/%(program_name)s.log
stderr_logfile=/var/log/supervisor/%(program_name)s.log
EOF
rm -rf /var/lib/apt/lists/*
ENTRYPOINT ["/start"]
开始
#!/bin/bash
set -e
echo "Adding crontab for unattended-upgrade ..."
echo "0 0 * * * root /usr/bin/unattended-upgrade" >> /etc/crontab
# can also use @daily syntax or use /etc/cron.daily
echo "Starting supervisord ..."
exec /usr/bin/supervisord -n -c /etc/supervisor/supervisord.conf
Edit
我开发了一个小工具docker-run，它作为docker容器运行，可以用来更新所有或选定的运行容器中的包，它也可以用来运行任何任意命令。
可以使用以下命令轻松测试:
Docker run——rm -v /var/run/ Docker .sock:/tmp/ Docker .sockSock itech/docker-run exec
默认情况下，它将在所有运行的容器中执行date命令并显示结果。如果你传递update而不是exec，它将在所有运行的容器中执行apt-get update和apt-get upgrade -y
以上答案也是正确的
有两种方法
使用的人 每隔一分钟运行脚本以获取新的docker映像
我只是分享脚本，可能会对你有帮助! 你可以用cronjob，我在OSX上成功尝试过
#!/bin/bash
##You can use below commented line for setting cron tab for running cron job and to store its O/P in one .txt file
#* * * * * /usr/bin/sudo -u admin -i bash -c /Users/Swapnil/Documents/checkimg.sh > /Users/Swapnil/Documents/cron_output.log 2>&1
# Example for the Docker Hub V2 API
# Returns all images and tags associated with a Docker Hub organization account.
# Requires 'jq': https://stedolan.github.io/jq/
# set username, password, and organization
# Filepath where your docker-compose file is present
FILEPATH="/Users/Swapnil/Documents/lamp-alpine"
# Your Docker hub user name
UNAME="ur username"
# Your Docker hub user password
UPASS="ur pwd"
# e.g organisation_name/image_name:image_tag
ORG="ur org name"
IMGNAME="ur img name"
IMGTAG="ur img tag"
# Container name
CONTNAME="ur container name"
# Expected built mins
BUILDMINS="5"
#Generally cronjob frequency
CHECKTIME="5"
NETWORKNAME="${IMGNAME}_private-network"
#After Image pulling, need to bring up all docker services?
DO_DOCKER_COMPOSE_UP=true
# -------
echo "Eecuting Script @ date and time in YmdHMS: $(date +%Y%m%d%H%M%S)"
set -e
PIDFILE=/Users/Swapnil/Documents/$IMGNAME/forever.pid
if [ -f $PIDFILE ]
then
PID=$(cat $PIDFILE)
ps -p $PID > /dev/null 2>&1
if [ $? -eq 0 ]
then
echo "Process already running"
exit 1
else
## Process not found assume not running
echo $$
echo $$ > $PIDFILE
if [ $? -ne 0 ]
then
echo "Could not create PID file"
exit 1
fi
fi
else
echo $$ > $PIDFILE
if [ $? -ne 0 ]
then
echo "Could not create PID file"
exit 1
fi
fi
# Check Docker is running or not; If not runing then exit
if docker info|grep Containers ; then
echo "Docker is running"
else
echo "Docker is not running"
rm $PIDFILE
exit 1
fi
# Check Container is running or not; and set variable
CONT_INFO=$(docker ps -f "name=$CONTNAME" --format "{{.Names}}")
if [ "$CONT_INFO" = "$CONTNAME" ]; then
echo "Container is running"
IS_CONTAINER_RUNNING=true
else
echo "Container is not running"
IS_CONTAINER_RUNNING=false
fi
# get token
echo "Retrieving token ..."
TOKEN=$(curl -s -H "Content-Type: application/json" -X POST -d '{"username": "'${UNAME}'", "password": "'${UPASS}'"}' https://hub.docker.com/v2/users/login/ | jq -r .token)
# get list of repositories
echo "Retrieving repository list ..."
REPO_LIST=$(curl -s -H "Authorization: JWT ${TOKEN}" https://hub.docker.com/v2/repositories/${ORG}/?page_size=100 | jq -r '.results|.[]|.name')
# output images & tags
echo "Images and tags for organization: ${ORG}"
echo
for i in ${REPO_LIST}
do
echo "${i}:"
# tags
IMAGE_TAGS=$(curl -s -H "Authorization: JWT ${TOKEN}" https://hub.docker.com/v2/repositories/${ORG}/${i}/tags/?page_size=100 | jq -r '.results|.[]|.name')
for j in ${IMAGE_TAGS}
do
echo " - ${j}"
done
#echo
done
# Check Perticular image is the latest or not
#imm=$(curl -s -H "Authorization: JWT ${TOKEN}" https://hub.docker.com/v2/repositories/${ORG}/${IMGNAME}/tags/?page_size=100)
echo "-----------------"
echo "Last built date details about Image ${IMGNAME} : ${IMGTAG} for organization: ${ORG}"
IMAGE_UPDATED_DATE=$(curl -s -H "Authorization: JWT ${TOKEN}" https://hub.docker.com/v2/repositories/${ORG}/${IMGNAME}/tags/?page_size=100 | jq -r '.results|.[]|select(.name | contains("'${IMGTAG}'")).last_updated')
echo "On Docker Hub IMAGE_UPDATED_DATE---$IMAGE_UPDATED_DATE"
echo "-----------------"
IMAGE_CREATED_DATE=$(docker image inspect ${ORG}/${IMGNAME}:${IMGTAG} | jq -r '.[]|.Created')
echo "Locally IMAGE_CREATED_DATE---$IMAGE_CREATED_DATE"
updatedDate=$(date -jf '%Y-%m-%dT%H:%M' "${IMAGE_UPDATED_DATE:0:16}" +%Y%m%d%H%M%S)
createdDate=$(date -jf '%Y-%m-%dT%H:%M' "${IMAGE_CREATED_DATE:0:16}" +%Y%m%d%H%M%S)
currentDate=$(date +%Y%m%d%H%M%S)
start_date=$(date -jf "%Y%m%d%H%M%S" "$currentDate" "+%s")
end_date=$(date -jf "%Y%m%d%H%M%S" "$updatedDate" "+%s")
updiffMins=$(( ($start_date - $end_date) / (60) ))
if [[ "$updiffMins" -lt $(($CHECKTIME+1)) ]]; then
if [ ! -d "${FILEPATH}" ]; then
mkdir "${FILEPATH}";
fi
cd "${FILEPATH}"
pwd
echo "updatedDate---$updatedDate" > "ScriptOutput_${currentDate}.txt"
echo "createdDate---$createdDate" >> "ScriptOutput_${currentDate}.txt"
echo "currentDate---$currentDate" >> "ScriptOutput_${currentDate}.txt"
echo "Found after regular checking time -> Docker hub's latest updated image is new; Diff ${updiffMins} mins" >> "ScriptOutput_${currentDate}.txt"
echo "Script is checking for latest updates after every ${CHECKTIME} mins" >> "ScriptOutput_${currentDate}.txt"
echo "Fetching all new"
echo "---------------------------"
if $IS_CONTAINER_RUNNING ; then
echo "Container is running"
else
docker-compose down
echo "Container stopped and removed; Network removed" >> "ScriptOutput_${currentDate}.txt"
fi
echo "Image_Created_Date=$currentDate" > ".env"
echo "ORG=$ORG" >> ".env"
echo "IMGNAME=$IMGNAME" >> ".env"
echo "IMGTAG=$IMGTAG" >> ".env"
echo "CONTNAME=$CONTNAME" >> ".env"
echo "NETWORKNAME=$NETWORKNAME" >> ".env"
docker-compose build --no-cache
echo "Docker Compose built" >> "ScriptOutput_${currentDate}.txt"
if $DO_DOCKER_COMPOSE_UP ; then
docker-compose up -d
echo "Docker services are up now, checked in" >> "ScriptOutput_${currentDate}.txt"
else
echo "Docker services are down, checked in" >> "ScriptOutput_${currentDate}.txt"
fi
elif [[ "$updatedDate" -gt "$createdDate" ]]; then
echo "Updated is latest"
start_date=$(date -jf "%Y%m%d%H%M%S" "$updatedDate" "+%s")
end_date=$(date -jf "%Y%m%d%H%M%S" "$createdDate" "+%s")
diffMins=$(( ($start_date - $end_date) / (60) ))
if [[ "$BUILDMINS" -lt "$diffMins" ]]; then
if [ ! -d "${FILEPATH}" ]; then
mkdir "${FILEPATH}";
fi
cd "${FILEPATH}"
pwd
echo "updatedDate---$updatedDate" > "ScriptOutput_${currentDate}.txt"
echo "createdDate---$createdDate" >> "ScriptOutput_${currentDate}.txt"
echo "currentDate---$currentDate" >> "ScriptOutput_${currentDate}.txt"
echo "Found after comparing times -> Docker hub's latest updated image is new; Diff ${diffMins} mins" >> "ScriptOutput_${currentDate}.txt"
echo "Actual image built time is less i.e. ${diffMins} mins than MAX expexted BUILD TIME i.e. ${BUILDMINS} mins" >> "ScriptOutput_${currentDate}.txt"
echo "Fetching all new" >> "ScriptOutput_${currentDate}.txt"
echo "-----------------------------"
if $IS_CONTAINER_RUNNING ; then
echo "Container is running"
else
docker-compose down
echo "Container stopped and removed; Network removed" >> "ScriptOutput_${currentDate}.txt"
fi
echo "Image_Created_Date=$currentDate" > ".env"
echo "ORG=$ORG" >> ".env"
echo "IMGNAME=$IMGNAME" >> ".env"
echo "IMGTAG=$IMGTAG" >> ".env"
echo "CONTNAME=$CONTNAME" >> ".env"
echo "NETWORKNAME=$NETWORKNAME" >> ".env"
docker-compose build --no-cache
echo "Docker Compose built" >> "ScriptOutput_${currentDate}.txt"
if $DO_DOCKER_COMPOSE_UP ; then
docker-compose up -d
echo "Docker services are up now" >> "ScriptOutput_${currentDate}.txt"
else
echo "Docker services are down" >> "ScriptOutput_${currentDate}.txt"
fi
elif [[ "$BUILDMINS" -gt "$diffMins" ]]; then
echo "Docker hub's latest updated image is NOT new; Diff ${diffMins} mins"
echo "Docker images not fetched"
else
echo "Docker hub's latest updated image is NOT new; Diff ${diffMins} mins"
echo "Docker images not fetched"
fi
elif [[ "$createdDate" -gt "$updatedDate" ]]; then
echo "Created is latest"
start_date=$(date -jf "%Y%m%d%H%M%S" "$createdDate" "+%s")
end_date=$(date -jf "%Y%m%d%H%M%S" "$updatedDate" "+%s")
echo "Docker hub has older docker image than local; Older than $(( ($start_date - $end_date) / (60) ))mins"
fi
echo
echo "------------end---------------"
rm $PIDFILE
这是我的docker-compose文件
version: "3.2"
services:
lamp-alpine:
build:
context: .
container_name: "${CONTNAME}"
image: "${ORG}/${IMGNAME}:${IMGTAG}"
ports:
- "127.0.0.1:80:80"
networks:
- private-network
networks:
private-network:
driver: bridge
我们使用一个脚本来检查正在运行的容器是否以最新映像启动。我们还使用upstart init脚本来启动docker映像。
#!/usr/bin/env bash
set -e
BASE_IMAGE="registry"
REGISTRY="registry.hub.docker.com"
IMAGE="$REGISTRY/$BASE_IMAGE"
CID=$(docker ps | grep $IMAGE | awk '{print $1}')
docker pull $IMAGE
for im in $CID
do
LATEST=`docker inspect --format "{{.Id}}" $IMAGE`
RUNNING=`docker inspect --format "{{.Image}}" $im`
NAME=`docker inspect --format '{{.Name}}' $im | sed "s/\///g"`
echo "Latest:" $LATEST
echo "Running:" $RUNNING
if [ "$RUNNING" != "$LATEST" ];then
echo "upgrading $NAME"
stop docker-$NAME
docker rm -f $NAME
start docker-$NAME
else
echo "$NAME up to date"
fi
done
init看起来像这样
docker run -t -i --name $NAME $im /bin/bash
这里有很多答案，但没有一个符合我的需要。我想知道提问者第一个问题的确切答案。如何知道hub.docker.com上的图像何时更新?
下面的脚本可以每天运行。在第一次运行时，它从HUB注册中心获得标记的基线和更新日期，并将它们保存在本地。从那时起，每次运行它都会检查注册表中的新标记和更新日期。因为每当有新图像存在时，它都会改变，所以它会告诉我们基本图像是否发生了变化。以下是剧本:
#!/bin/bash
DATAPATH='/data/docker/updater/data'
if [ ! -d "${DATAPATH}" ]; then
mkdir "${DATAPATH}";
fi
IMAGES=$(docker ps --format "{{.Image}}")
for IMAGE in $IMAGES; do
ORIGIMAGE=${IMAGE}
if [[ "$IMAGE" != *\/* ]]; then
IMAGE=library/${IMAGE}
fi
IMAGE=${IMAGE%%:*}
echo "Checking ${IMAGE}"
PARSED=${IMAGE//\//.}
if [ ! -f "${DATAPATH}/${PARSED}" ]; then
# File doesn't exist yet, make baseline
echo "Setting baseline for ${IMAGE}"
curl -s "https://registry.hub.docker.com/v2/repositories/${IMAGE}/tags/" > "${DATAPATH}/${PARSED}"
else
# File does exist, do a compare
NEW=$(curl -s "https://registry.hub.docker.com/v2/repositories/${IMAGE}/tags/")
OLD=$(cat "${DATAPATH}/${PARSED}")
if [[ "${VAR1}" == "${VAR2}" ]]; then
echo "Image ${IMAGE} is up to date";
else
echo ${NEW} > "${DATAPATH}/${PARSED}"
echo "Image ${IMAGE} needs to be updated";
H=`hostname`
ssh -i /data/keys/<KEYFILE> <USER>@<REMOTEHOST>.com "{ echo \"MAIL FROM: root@${H}\"; echo \"RCPT TO: <USER>@<EMAILHOST>.com\"; echo \"DATA\"; echo \"Subject: ${H} - ${IMAGE} needs update\"; echo \"\"; echo -e \"\n${IMAGE} needs update.\n\ndocker pull ${ORIGIMAGE}\"; echo \"\"; echo \".\"; echo \"quit\"; sleep 1; } | telnet <SMTPHOST> 25"
fi
fi
done;
您可能需要更改顶部的DATAPATH变量，并更改末尾的电子邮件通知命令以满足您的需要。对我来说，我把它SSH到我的SMTP所在的另一个网络上的服务器上。但是您也可以轻松地使用邮件命令。
现在，您还需要检查容器本身中是否有更新的包。这实际上可能比在容器工作后“拉”更有效。以下是实现这一目标的脚本:
#!/bin/bash
function needsUpdates() {
RESULT=$(docker exec ${1} bash -c ' \
if [[ -f /etc/apt/sources.list ]]; then \
grep security /etc/apt/sources.list > /tmp/security.list; \
apt-get update > /dev/null; \
apt-get upgrade -oDir::Etc::Sourcelist=/tmp/security.list -s; \
fi; \
')
RESULT=$(echo $RESULT)
GOODRESULT="Reading package lists... Building dependency tree... Reading state information... Calculating upgrade... 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded."
if [[ "${RESULT}" != "" ]] && [[ "${RESULT}" != "${GOODRESULT}" ]]; then
return 0
else
return 1
fi
}
function sendEmail() {
echo "Container ${1} needs security updates";
H=`hostname`
ssh -i /data/keys/<KEYFILE> <USRER>@<REMOTEHOST>.com "{ echo \"MAIL FROM: root@${H}\"; echo \"RCPT TO: <USER>@<EMAILHOST>.com\"; echo \"DATA\"; echo \"Subject: ${H} - ${1} container needs security update\"; echo \"\"; echo -e \"\n${1} container needs update.\n\n\"; echo -e \"docker exec ${1} bash -c 'grep security /etc/apt/sources.list > /tmp/security.list; apt-get update > /dev/null; apt-get upgrade -oDir::Etc::Sourcelist=/tmp/security.list -s'\n\n\"; echo \"Remove the -s to run the update\"; echo \"\"; echo \".\"; echo \"quit\"; sleep 1; } | telnet <SMTPHOST> 25"
}
CONTAINERS=$(docker ps --format "{{.Names}}")
for CONTAINER in $CONTAINERS; do
echo "Checking ${CONTAINER}"
if needsUpdates $CONTAINER; then
sendEmail $CONTAINER
fi
done
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