ECS: Uzamčení uzlu se nezdaří kvůli omezovači rychlosti SSH na uzlu

Zjištěný problém po upgradu na ECS 4.0.

Stav uzlu se ve webovém uživatelském rozhraní ECS zobrazuje jako "Unknown" nebo "Locked".

Příkaz uzamknutí rozhraní příkazového řádku se nedaří spustit.

Přístup SSH k uzlu zůstává k dispozici i přes pokus o uzamčení.

Tento problém způsobuje přítomnost omezovače rychlosti SSH použitého pomocí pravidla STIG (SLES-12-030040). Toto pravidlo není kompatibilní se systémem SLES15 a po jeho použití je nelze vrátit zpět pomocí architektury SLES12 STIG.

Níže uvedený příkaz zobrazí informace o operačním systému:

admin@node1:~> cat /etc/os-release
NAME="SLES"
VERSION="15-SP4"
VERSION_ID="15.4"
PRETTY_NAME="SUSE Linux Enterprise Server 15 SP4"
ID="sles"
ID_LIKE="suse"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:suse:sles:15:sp4"
DOCUMENTATION_URL="https://documentation.suse.com/"

Chcete-li tento problém vyřešit, odeberte omezovač rychlosti SSH z dotčeného uzlu nebo uzlů:

1. Zkontrolujte omezovač rychlosti SSH: 

admin@node1:~> sudo iptables -L | grep limit  | grep ssh
LOG        tcp  --  anywhere             anywhere             limit: avg 3/min burst 5 tcp dpt:ssh ctstate NEW recent: CHECK seconds: 60 hit_count: 3 name: ssh side: source mask: 255.255.255.255 LOG level warning tcp-options ip-options prefix "SFW2-INext-DROPr "

2. Vraťte zpět pravidlo STIG:

admin@node1:~> cd /opt/emc/security/hardening/root/sbin; sudo ./revert-harden -i SLES-12-030040
Changes reverted: FW_SERVICES_ACCEPT_EXT="0/0,tcp,22,,hitcount=3,blockseconds=60,recentname=ssh"
FW_SERVICES_ACCEPT_EXT="0/0,tcp,22,,hitcount=3,blockseconds=60,recentname=ssh"
Changes reverted: TCP="ssh"
Restarting SuSEfirewall2.service ...
SuSEfirewall2.service restarted successfully.
Reverted STIG ID: SLES-12-030040 on /etc/sysconfig/SuSEfirewall2.d/services/sshd successfully

3. Ověřte změny:

admin@node1:/opt/emc/security/hardening/root/sbin> sudo iptables -L | grep limit  | grep ssh

4. Uzamkněte uzel pomocí WEB UI nebo CLI:

admin@node1:~> sudo -i lockdown set lock
[lockdown] :Info: Suspend fabric agent firewall check
INFO: Parsing /opt/emc/nile/etc/conf/nan/emc-firewall-cfg
dev_ext: public - dev_int: private private.4 pslave-0 pslave-1
INFO: Updating /etc/sysconfig/SuSEfirewall2.d/services/emc-ecs-custom
INFO: Updating /etc/sysconfig/SuSEfirewall2
<38>Jun 25 10:34:47 SuSEfirewall2[32514]: Firewall rules unloaded.
<38>Jun 25 10:34:47 SuSEfirewall2[32594]: Setting up rules from /etc/sysconfig/SuSEfirewall2 ...
<38>Jun 25 10:34:47 SuSEfirewall2[32594]: using default zone 'ext' for interface docker0
<38>Jun 25 10:34:47 SuSEfirewall2[32594]: using default zone 'ext' for interface public_mgmt
<38>Jun 25 10:34:47 SuSEfirewall2[32594]: using default zone 'ext' for interface slave_0
<38>Jun 25 10:34:47 SuSEfirewall2[32594]: using default zone 'ext' for interface slave_1
<38>Jun 25 10:34:47 SuSEfirewall2[32594]: Firewall custom rules loaded from /opt/emc/nile/etc/conf/nan/nan_pbr_rules
<38>Jun 25 10:34:48 SuSEfirewall2[32594]: /proc/sys/net/ipv4/conf/all/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:48 SuSEfirewall2[32594]: /proc/sys/net/ipv4/conf/default/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:48 SuSEfirewall2[32594]: /proc/sys/net/ipv4/conf/docker0/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:48 SuSEfirewall2[32594]: /proc/sys/net/ipv4/conf/lo/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:48 SuSEfirewall2[32594]: /proc/sys/net/ipv4/conf/private/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:48 SuSEfirewall2[32594]: /proc/sys/net/ipv4/conf/pslave-0/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:48 SuSEfirewall2[32594]: /proc/sys/net/ipv4/conf/pslave-1/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:48 SuSEfirewall2[32594]: /proc/sys/net/ipv4/conf/public/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:48 SuSEfirewall2[32594]: /proc/sys/net/ipv4/conf/slave-0/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:49 SuSEfirewall2[32594]: /proc/sys/net/ipv4/conf/slave-1/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:49 SuSEfirewall2[32594]: Firewall rules successfully set
INFO: Updating /etc/sysconfig/SuSEfirewall2
<38>Jun 25 10:34:57 SuSEfirewall2[35003]: Firewall rules unloaded.
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: Setting up rules from /etc/sysconfig/SuSEfirewall2 ...
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: using default zone 'ext' for interface docker0
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: using default zone 'ext' for interface public_mgmt
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: using default zone 'ext' for interface slave_0
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: using default zone 'ext' for interface slave_1
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: Firewall custom rules loaded from /opt/emc/nile/etc/conf/nan/nan_pbr_rules
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: /proc/sys/net/ipv4/conf/all/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: /proc/sys/net/ipv4/conf/default/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: /proc/sys/net/ipv4/conf/docker0/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: /proc/sys/net/ipv4/conf/lo/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:57 SuSEfirewall2[35084]: /proc/sys/net/ipv4/conf/private/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:58 SuSEfirewall2[35084]: /proc/sys/net/ipv4/conf/pslave-0/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:58 SuSEfirewall2[35084]: /proc/sys/net/ipv4/conf/pslave-1/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:58 SuSEfirewall2[35084]: /proc/sys/net/ipv4/conf/public/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:58 SuSEfirewall2[35084]: /proc/sys/net/ipv4/conf/slave-0/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:58 SuSEfirewall2[35084]: /proc/sys/net/ipv4/conf/slave-1/rp_filter override in /etc/sysctl.d/70-nan-performance.conf, not setting it
<38>Jun 25 10:34:59 SuSEfirewall2[35084]: Firewall rules successfully set
locked
[lockdown] :Info: Resume fabric agent firewall check

Toto náhradní řešení se vztahuje pouze na uzly se systémem SLES15, kde byla dříve použita architektura SLES12 STIG. Před použitím nebo zrušením pravidel STIG se ujistěte, zda jsou kompatibilní.