├── CONTRIBUTING.md ├── LICENSE ├── README.md ├── centos-7-from-iso.json ├── cloudbuild └── custom-boot-image-build.yaml ├── http └── centos-7.ks └── scripts ├── gce.sh └── linux-guest-environment.sh /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | # How to Contribute 2 | 3 | We'd love to accept your patches and contributions to this project. There are 4 | just a few small guidelines you need to follow. 5 | 6 | ## Contributor License Agreement 7 | 8 | Contributions to this project must be accompanied by a Contributor License 9 | Agreement. You (or your employer) retain the copyright to your contribution; 10 | this simply gives us permission to use and redistribute your contributions as 11 | part of the project. 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We also recommend that a 186 | file or class name and description of purpose be included on the 187 | same "printed page" as the copyright notice for easier 188 | identification within third-party archives. 189 | 190 | Copyright [yyyy] [name of copyright owner] 191 | 192 | Licensed under the Apache License, Version 2.0 (the "License"); 193 | you may not use this file except in compliance with the License. 194 | You may obtain a copy of the License at 195 | 196 | http://www.apache.org/licenses/LICENSE-2.0 197 | 198 | Unless required by applicable law or agreed to in writing, software 199 | distributed under the License is distributed on an "AS IS" BASIS, 200 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 201 | See the License for the specific language governing permissions and 202 | limitations under the License. 203 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Creating Custom Boot Images for Compute Engine 2 | This is the set of scripts for Creating custom base Images for Compute Engine with Jenkins or Cloud Build and Packer. The tutorial explains how to create a Jenkins job and Packer scripts to build a custom boot image from an ISO and Kickstart file. 3 | 4 | # Included Files 5 | 1. /http/centos-7.ks - kickstart file for CentOS7. 6 | 2. /scripts/gce.sh - provisioning script used to provision initial gce image. 7 | 3. /scripts/linux-guest-environment.sh used to finalize the image with the linux guest environment for Google Cloud. 8 | 5. centos-7-from-iso.json - uses Packer, an ISO file and the supplied Kickstart script to build the raw compute image. 9 | -------------------------------------------------------------------------------- /centos-7-from-iso.json: -------------------------------------------------------------------------------- 1 | { 2 | "builders": [ 3 | { 4 | "type": "qemu", 5 | "name": "centos-7-x86_64-1804-image", 6 | "vm_name": "disk.raw", 7 | "output_directory": "output", 8 | "accelerator": "kvm", 9 | "disk_size": 2048, 10 | "format": "raw", 11 | "headless": true, 12 | "http_directory": "http", 13 | "iso_checksum": "659691c28a0e672558b003d223f83938f254b39875ee7559d1a4a14c79173193", 14 | "iso_checksum_type": "sha256", 15 | "iso_url": "http://mirrors.mit.edu/centos/7.8.2003/isos/x86_64/CentOS-7-x86_64-Minimal-2003.iso", 16 | "shutdown_command": "/sbin/shutdown -hP now", 17 | "ssh_username": "root", 18 | "ssh_password": "root_password_will_be_deleted", 19 | "ssh_port": 22, 20 | "ssh_wait_timeout": "10000s", 21 | "qemu_binary": "qemu-kvm", 22 | "qemuargs": [ [ "-m", "1024m" ] ], 23 | "boot_wait": "10s", 24 | "boot_command": [ 25 | " text ks=http://{{ .HTTPIP }}:{{ .HTTPPort }}/centos-7.ks" 26 | ] 27 | } 28 | ], 29 | "provisioners": [ 30 | { 31 | "type": "shell", 32 | "scripts": [ 33 | "scripts/gce.sh" 34 | ], 35 | "execute_command": "sh '{{.Path}}'" 36 | }, 37 | { 38 | "type": "shell", 39 | "scripts": [ 40 | "scripts/linux-guest-environment.sh" 41 | ], 42 | "execute_command": "sh '{{.Path}}'" 43 | } 44 | ], 45 | "post-processors": [ 46 | [ 47 | { 48 | "type": "compress", 49 | "output": "output/disk.raw.tar.gz" 50 | }, 51 | { 52 | "type": "shell-local", 53 | "inline": [ 54 | "gsutil cp output/disk.raw.tar.gz {{user `gcs_bucket`}}/{{user `image_family`}}-${BUILD_NUMBER}.tar.gz", 55 | "gcloud compute images create {{user `image_family`}}-${BUILD_NUMBER} \\", 56 | "--source-uri={{user `gcs_bucket`}}/{{user `image_family`}}-${BUILD_NUMBER}.tar.gz \\", 57 | "--family={{user `image_family`}}" 58 | ] 59 | } 60 | ] 61 | ] 62 | } 63 | -------------------------------------------------------------------------------- /cloudbuild/custom-boot-image-build.yaml: -------------------------------------------------------------------------------- 1 | steps: 2 | - id: 'create_agent_instance' 3 | name: 'gcr.io/$PROJECT_ID/base-image-builder' 4 | env: 5 | - 'IMAGE_FAMILY=acme-centos-7' 6 | - 'PROJECT_ID=$PROJECT_ID' 7 | - 'TAG_NAME=$TAG_NAME' 8 | - 'IMAGE_ZONE=us-central1-f' 9 | - 'PACKER_SPEC=centos-7-from-iso.json' 10 | - 'IMAGES_BUCKET=gs://$PROJECT_ID-custom-images' 11 | timeout: 1800s 12 | -------------------------------------------------------------------------------- /http/centos-7.ks: -------------------------------------------------------------------------------- 1 | # Copyright 2018 Google LLC 2 | 3 | # Licensed under the Apache License, Version 2.0 (the "License"); 4 | # you may not use this file except in compliance with the License. 5 | # You may obtain a copy of the License at 6 | 7 | # https://www.apache.org/licenses/LICENSE-2.0 8 | 9 | # Unless required by applicable law or agreed to in writing, software 10 | # distributed under the License is distributed on an "AS IS" BASIS, 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | # See the License for the specific language governing permissions and 13 | # limitations under the License. 14 | 15 | 16 | install 17 | text 18 | cdrom 19 | lang en_US.UTF-8 20 | keyboard us 21 | network --onboot yes --bootproto=dhcp --noipv6 --device=eth0 22 | authconfig --enableshadow --passalgo=sha512 23 | timezone --utc UTC 24 | clearpart --all --initlabel 25 | bootloader --location=mbr 26 | part / --size=100 --grow --fsoptions="defaults" --label=/ --fstype=xfs 27 | 28 | # Repositories to use 29 | repo --name="CentOS" --baseurl=http://mirror.centos.org/centos/7/os/x86_64/ --cost=100 30 | ## Uncomment for rolling builds 31 | #repo --name="Updates" --baseurl=http://mirror.centos.org/centos/7/updates/x86_64/ --cost=100 32 | repo 33 | rootpw root_password_will_be_deleted 34 | firewall --disabled 35 | selinux --disabled 36 | 37 | services --disabled=NetworkManager,kdump --enabled=network,sshd,ntpd 38 | skipx 39 | 40 | reboot 41 | zerombr 42 | %packages --nobase 43 | @core 44 | openssh-server 45 | openssh-clients 46 | acpid 47 | kpartx 48 | gdisk 49 | net-tools 50 | ntp 51 | parted 52 | rsync 53 | vim 54 | # Make sure that subscription-manager and rhn packages are not installed as 55 | # they conflict with GCE packages. 56 | -subscription-manager 57 | -*rhn* 58 | -alsa-utils 59 | -b43-fwcutter 60 | -dmraid 61 | -eject 62 | -gpm 63 | -kexec-tools 64 | -irqbalance 65 | -microcode_ctl 66 | -smartmontools 67 | -aic94xx-firmware 68 | -atmel-firmware 69 | -b43-openfwwf 70 | -bfa-firmware 71 | -efibootmgr 72 | -ipw2100-firmware 73 | -ipw2200-firmware 74 | -ivtv-firmware 75 | -iwl100-firmware 76 | -iwl1000-firmware 77 | -iwl3945-firmware 78 | -iwl4965-firmware 79 | -iwl5000-firmware 80 | -iwl5150-firmware 81 | -iwl6000-firmware 82 | -iwl6000g2a-firmware 83 | -iwl6050-firmware 84 | -kernel-firmware 85 | -libertas-usb8388-firmware 86 | -ql2100-firmware 87 | -ql2200-firmware 88 | -ql23xx-firmware 89 | -ql2400-firmware 90 | -ql2500-firmware 91 | -rt61pci-firmware 92 | -rt73usb-firmware 93 | -xorg-x11-drv-ati-firmware 94 | -zd1211-firmware 95 | %end 96 | 97 | %post 98 | set -x 99 | rm -f /etc/boto.cfg /etc/udev/rules.d/*persistent-net.rules 100 | ln -s /dev/null /etc/udev/rules.d/75-persistent-net-generator.rules 101 | sed -i '/^\(HWADDR\)=/d' /etc/sysconfig/network-scripts/ifcfg-* 102 | cat >>/etc/dhclient.conf <>/etc/sysconfig/network-scripts/ifcfg-eth0 <> /etc/default/grub 28 | echo 'GRUB_SERIAL_COMMAND="serial --speed=19200 --unit=0 --word=8 --parity=no --stop=1"' >> /etc/default/grub 29 | grub-mkconfig -o /boot/grub/grub.cfg 30 | 31 | ## We have to update our images before we install yum-cron otherwise our changes 32 | ## will get clobbered when yum updates. 33 | yum -y install yum-cron 34 | ## Make changes to yum-cron.conf on el7/centos7 35 | grep apply_updates /etc/yum/yum-cron.conf 36 | cp /etc/yum/yum-cron.conf /tmp/yum-cron.conf 37 | ## Apply updates 38 | sed -i 's/update_cmd =.*/update_cmd = default/' /tmp/yum-cron.conf 39 | sed -i 's/apply_updates =.*/apply_updates = yes/' /tmp/yum-cron.conf 40 | cat /tmp/yum-cron.conf > /etc/yum/yum-cron.conf 41 | grep apply_updates /etc/yum/yum-cron.conf 42 | ## This enables the service on both el6 and el7 based VMs. 43 | chkconfig yum-cron on 44 | # 45 | ## Clean up the cache for smaller images. 46 | yum clean all 47 | # 48 | ## Blacklist the floppy module. 49 | echo "blacklist floppy" > /etc/modprobe.d/blacklist-floppy.conf 50 | # 51 | ## Set the default timeout to 0 and update grub2. 52 | sed -i 's:GRUB_TIMEOUT=.*:GRUB_TIMEOUT=0:' /etc/default/grub 53 | grub2-mkconfig -o /boot/grub2/grub.cfg 54 | echo "Running dracut." 55 | dracut -f 56 | # 57 | ## Disable IPv6 for Yum. 58 | echo "ip_resolve=4" >> /etc/yum.conf 59 | # 60 | ## Ensure no attempt will be made to persist network MAC addresses. 61 | ln -s /dev/null /etc/udev/rules.d/75-persistent-net-generator.rules 62 | sed -i '/^\(HWADDR\)=/d' /etc/sysconfig/network-scripts/ifcfg-* 63 | # 64 | ## Disable password authentication by default. 65 | sed -i -e '/^PasswordAuthentication /s/ yes$/ no/' /etc/ssh/sshd_config 66 | 67 | ## Disable requiring password for sudo 68 | sed -i -e $'/^%whee/s/^/#/' /etc/sudoers 69 | sed -i -e $'/NOPASSWD/s/#//' /etc/sudoers 70 | 71 | # 72 | ## Set ServerAliveInterval and ClientAliveInterval to prevent SSH 73 | ## disconnections. The pattern match is tuned to each source config file. 74 | ## The $'...' quoting syntax tells the shell to expand escape characters. 75 | sed -i -e $'/^\tServerAliveInterval/d' /etc/ssh/ssh_config 76 | sed -i -e $'/^Host \\*$/a \\\tServerAliveInterval 420' /etc/ssh/ssh_config 77 | sed -i -e $'/^Host \\*$/a \\\tTunnel no' /etc/ssh/ssh_config 78 | sed -i -e $'/^Host \\*$/a \\\tCiphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,aes128-cbc,3des-cbc' /etc/ssh/ssh_config 79 | sed -i -e $'/^Host \\*$/a \\\tStrictHostKeyChecking no' /etc/ssh/ssh_config 80 | sed -i -e $'/^Host \\*$/a \\\tHostBasedAuthentication no' /etc/ssh/ssh_config 81 | sed -i -e $'/^Host \\*$/a \\\tForwardX11 no' /etc/ssh/ssh_config 82 | sed -i -e $'/^Host \\*$/a \\\tForwardAgent no' /etc/ssh/ssh_config 83 | sed -i -e $'/^Host \\*$/a \\\tProtocol 2' /etc/ssh/ssh_config 84 | sed -i -e '/ClientAliveInterval/s/^.*/ClientAliveInterval 420/' /etc/ssh/sshd_config 85 | # 86 | ## Disable root login via SSH by default. 87 | sed -i -e '/PermitRootLogin yes/s/^.*/PermitRootLogin no/' /etc/ssh/sshd_config 88 | ## Disable sshd tunnelt. 89 | sed -i -e '/PermitTunnel.*$/s/^.*/PermitTunnel no/' /etc/ssh/sshd_config 90 | ## Allow tcp forwarding 91 | sed -i -e '/AllowTcpForwarding.*$/s/^.*/AllowTcpForwarding yes/' /etc/ssh/sshd_config 92 | ## Disallow X11 Forwarding 93 | sed -i -e '/X11Forwarding.*$/s/^.*/X11Forwarding no/' /etc/ssh/sshd_config 94 | 95 | # 96 | ## Configure NTPD to use our servers. 97 | sed -i -e '/pool.ntp.org/d' /etc/ntp.conf 98 | cat >>/etc/ntp.conf <