ノードが IP アドレス 169.254.169.254 に ping すると、CRS root.sh スクリプトが次のエラーで失敗します。
has a disk HB, but no network HB
IP アドレス 169.254.169.254 は、 Google Cloud でインスタンスを登録する Google Cloudメタデータ サービスです。この IP アドレスをブロックすると、 Google Cloud VM は起動できません。これにより、HAIP 通信ルートが中断され、Bare Metal Solution RAC サーバーで HAIP 通信の問題が発生する可能性があります。
この問題を解決するには、IP アドレスをブロックするか、HAIP を無効にする必要があります。次の例は、route コマンドを使用して IP アドレスをブロックする方法を示しています。route ステートメントによる変更は永続的ではありません。そのため、システム起動スクリプトを変更する必要があります。
この問題を解決するには、次の操作を行います。
すべてのノードで、root.sh スクリプトを再実行する前に次のコマンドを実行します。
/sbin/route add -host 169.254.169.254 reject
rc スクリプトを実行可能にします。
chmod +x /etc/rc.d/rc.local
/etc/rc.d/rc.local ファイルに次の行を追加します。
/sbin/route add -host 169.254.169.254 reject
Enable rc-local service
systemctl status rc-local.service
systemctl enable rc-local.service
systemctl start rc-local.service
再起動プロセスが応答しない
サーバーで Red Hat Linux、OVM、SUSE Linux が実行され、多くの LUN が接続されている場合、再起動プロセスが応答しなくなることがあります。
[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["わかりにくい","hardToUnderstand","thumb-down"],["情報またはサンプルコードが不正確","incorrectInformationOrSampleCode","thumb-down"],["必要な情報 / サンプルがない","missingTheInformationSamplesINeed","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2025-09-04 UTC。"],[[["\u003cp\u003eThis document provides solutions for common issues encountered when troubleshooting Oracle RAC on Bare Metal Solution, including SSH and SCP performance problems.\u003c/p\u003e\n"],["\u003cp\u003eThe OpenSSH error during Grid Infrastructure installation can be resolved by modifying the \u003ccode\u003eKexAlgorithms\u003c/code\u003e in the \u003ccode\u003e/etc/ssh/sshd_config\u003c/code\u003e file and restarting the \u003ccode\u003esshd\u003c/code\u003e service.\u003c/p\u003e\n"],["\u003cp\u003eIssues with CRS \u003ccode\u003eroot.sh\u003c/code\u003e or OCSSD failing due to a \u003ccode\u003eNo Network HB\u003c/code\u003e error can be addressed by blocking the IP address 169.254.169.254 using the \u003ccode\u003eroute\u003c/code\u003e command and adding it to the \u003ccode\u003e/etc/rc.d/rc.local\u003c/code\u003e file.\u003c/p\u003e\n"],["\u003cp\u003eIf the server's reboot process stops responding, especially with many attached LUNs, increasing the watchdog timeout value in the \u003ccode\u003e/etc/systemd/system.conf.d/\u003c/code\u003e or modifying the \u003ccode\u003egrub.cfg\u003c/code\u003e file can resolve it.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eRejecting connection\u003c/code\u003e error during Oracle Grid infrastructure 12c installation can be fixed by blocking access to the metadata service on both cloud VMs and Bare Metal Solution hosts using firewall commands.\u003c/p\u003e\n"]]],[],null,["# Troubleshoot Oracle RAC issues\n==============================\n\nThis page provides troubleshooting tips for issues related to Oracle RAC on\nBare Metal Solution.\n\nCheck if your question or problem has already been addressed on the\n[Known issues and limitations](/bare-metal/docs/known-issues) page.\n\n### SSH verification fails with OpenSSH error\n\nSSH verification might fail with the following OpenSSH error: \n\n OpenSSH_6.7: ERROR [INS-06003] Failed to setup passwordless SSH connectivity During Grid Infrastructure Install\n\nTo resolve this issue, do the following:\n\n1. In the `/etc/ssh/sshd_config` file, add the following line:\n\n KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1\n\n2. Restart the `sshd` service to apply the changes.\n\n /etc/init.d/sshd restart\n\nSCP file copy taking too long\n-----------------------------\n\nThe SCP file copy with rekey operation might take too long to complete due to\na Bare Metal Solution SSH daemon configuration issue.\n\nTo resolve this issue, do the following:\n\n1. On your Bare Metal Solution server, open the `sshd_config` file in edit mode.\n\n vi /etc/ssh/sshd_config\n\n2. In the `sshd_config` file, add following line. If the line already exists in\n the file, modify it as follows:\n\n ClientAliveInterval 420\n\n3. Restart the `sshd` service to apply the changes.\n\n /etc/init.d/sshd restart\n\nCRS `root.sh` or OCSSD fails with `No Network HB` error\n-------------------------------------------------------\n\nCRS `root.sh` script fails with the following error if the node pings\nthe IP address 169.254.169.254: \n\n has a disk HB, but no network HB\n\nThe IP address 169.254.169.254 is the Google Cloud metadata service\nwhich registers the instance in Google Cloud. If you block this IP\naddress, the Google Cloud VM can't boot up. This in turn can interrupt the\nHAIP communication route causing the Bare Metal Solution RAC servers to\nexperience HAIP communication issues.\n\nTo resolve this issue, you need to block the IP address or disable HAIP. The\nfollowing example shows how to block IP address with `route` commands. The\nchanges made by `route` statement are not persistent. Therefore, you need to\nmodify the system startup scripts.\n\nTo resolve this issue, do the following:\n\n1. On all the nodes, run the following command before rerunning the `root.sh`\n script.\n\n /sbin/route add -host 169.254.169.254 reject\n\n2. Make the `rc` script executable.\n\n chmod +x /etc/rc.d/rc.local\n\n3. In the `/etc/rc.d/rc.local` file, add the following lines:\n\n /sbin/route add -host 169.254.169.254 reject\n\n Enable rc-local service\n systemctl status rc-local.service\n systemctl enable rc-local.service\n systemctl start rc-local.service\n\nReboot process not responding\n-----------------------------\n\nIf your server is running Red Hat Linux, OVM, or SUSE Linux, and there are many\nLUNs attached to it, the reboot process might stop responding.\n\nTo resolve this issue, increase the default watchdog timeout value:\n\n1. Under `/etc/systemd`, create a folder named `system.conf.d`.\n\n2. In the folder, create a `*.conf` file. For example,\n `/etc/systemd/system.conf.d/kernel-reboot-workaround.conf`.\n\n3. In the `*.conf` file, add the following code:\n\n [Manager]\n\n RuntimeWatchdogSec=5min\n\n ShutdownWatchdogSec=5min\n\nAn alternative workaround is as follows:\n\n1. Open the `grub.cfg` file in edit mode.\n\n vi /etc/default/grub\n\n2. Remove the `quiet` parameter from the settings.\n\n3. Add the following after the parameter `GRUB_CMDLINE_LINUX`:\n\n acpi_no_watchdog DefaultTimeoutStartSec=900s DefaultTimeoutStopSec=900s\n\n4. Rebuild the `grub.cfg` file.\n\n grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg\n\nOracle Grid infrastructure 12c fails with `Rejecting connection` error\n----------------------------------------------------------------------\n\nOracle Grid infrastructure 12c installation might fail with the following error: \n\n Rejecting connection from node 2 as MultiNode RAC is not supported or certified in this Configuration.\n\nThis error occurs because the IP address 169.254.169.254 is forwarded to the\nlocal metadata service of a Compute Engine VM, making it look like the Bare Metal Solution\nhost is a Compute Engine VM. Such a configuration might also leak the\nCompute Engine VM's private\nservice account keys.\n\nTo resolve this issue, consider the security implications of your NAT\nconfiguration and limit external network access as much as possible. Do the\nfollowing:\n\n- Block the access to the metadata service on your cloud VM:\n\n firewall-cmd --direct --add-rule ipv4 filter FORWARD 0 -d 169.254.169.254 -j REJECT --reject-with icmp-host-unreachable\n\n firewall-cmd --permanent --direct --add-rule ipv4 filter FORWARD 0 -d 169.254.169.254 -j REJECT --reject-with icmp-host-unreachable\n\n- Block access to the metadata service on the Bare Metal Solution host:\n\n firewall-cmd --direct --add-rule ipv4 filter OUTPUT 0 -d 169.254.169.254 -j REJECT --reject-with icmp-host-unreachable\n\n firewall-cmd --permanent --direct --add-rule ipv4 filter OUTPUT 0 -d 169.254.169.254 -j REJECT --reject-with icmp-host-unr"]]
