Script to find if your Docker image with the specific tag exists or not. Check the blog at https://blog.virtualk.xyz/check-docker-image.

docker-image-check.sh

function DockerImageCheckFunction() {

    # you can comment all the DEBUG echo statements, there are here just for info.
    DHUB_TOKEN=$(curl -sSLd "username=${DOCKER_HUB_USERNAME}&password=${DOCKER_HUB_PASSWORD}" https://hub.docker.com/v2/users/login | jq -r ".token")
    echo "[DEBUG] [$(date)] Token is: $DHUB_TOKEN"
    echo
    echo "[DEBUG] [$(date)] Hitting the endpoint: https://hub.docker.com/v2/repositories/${DOCKER_REPO}/tags/${DOCKER_TAG}/"
    REPO_RESPONSE=$(curl -sH "Authorization: JWT $DHUB_TOKEN" "https://hub.docker.com/v2/repositories/${DOCKER_REPO}/tags/${DOCKER_TAG}/")

    echo
    echo "[DEBUG] [$(date)] Response from Docker Hub:"
    echo $REPO_RESPONSE
    echo
    TAG_STATUS=$(echo $REPO_RESPONSE | jq .tag_status | tr -d '"')
    echo "[DEBUG] [$(date)] Tag status is: $TAG_STATUS"
    echo

    if [[ $TAG_STATUS == "active" ]]; then
        echo Docker Image $DOCKER_REPO exists with Tag $DOCKER_TAG
    else
        echo "Docker Image Does Not Exist"
    fi

}

# Edit The Below Varibales
DOCKER_HUB_USERNAME="myserName"
DOCKER_HUB_PASSWORD="myDockerHubToken"
DOCKER_REPO="myRepo"
DOCKER_TAG="latest"

# Calling the Function
DockerImageCheckFunction