ironic-image/configure-nonroot.sh

@@ -1,53 +1,70 @@
 #!/usr/bin/bash
 
+# This script changes permissions to allow Ironic container to run as non-root
+# user. As the same image is used to run ironic, ironic-httpd, ironic-dsnmasq,
+# and ironic-log-watch via BMO's ironic k8s manifest, it has
+# to be configured to work with multiple different users and groups, while they
+# share files via bind mounts (/shared, /certs/*), which can only get one
+# group id as "fsGroup". Additionally, dnsmasq needs three capabilities to run
+# which we provide via "setcap", and "allowPrivilegeEscalation: true" in
+# manifest.
+
+set -eux
+
+# user and group are from ironic rpms (uid 997, gid 994)
 NONROOT_UID=10475
 NONROOT_GID=10475
-USER="ironic-suse"
+IRONIC_USER="ironic-suse"
+IRONIC_GROUP="ironic-suse"
 
-groupadd -r -g ${NONROOT_GID} ${USER}
+groupadd -r -g ${NONROOT_GID} ${IRONIC_GROUP}
 useradd -r -g ${NONROOT_GID} \
            -u ${NONROOT_UID} \
            -d /var/lib/ironic \
            -s /sbin/nologin \
-           ${USER}
+           ${IRONIC_USER}
 
-# create ironic's http_root directory
-mkdir -p /shared/html
-chown "${NONROOT_UID}":"${NONROOT_GID}" /shared/html
+# most containers mount /shared but dnsmasq can live without it
+mkdir -p /shared
+mkdir -p /data
+mkdir -p /conf
+chown "${IRONIC_USER}":"${IRONIC_GROUP}" /shared
+chown "${IRONIC_USER}":"${IRONIC_GROUP}" /data
+chown "${IRONIC_USER}":"${IRONIC_GROUP}" /conf
 
 # we'll bind mount shared ca and ironic certificate dirs here
 # that need to have correct ownership as the entire ironic in BMO
 # deployment shares a single fsGroup in manifest's securityContext
 mkdir -p /certs/ca
-chown "${NONROOT_UID}":"${NONROOT_GID}" /certs{,/ca}
+chown "${IRONIC_USER}":"${IRONIC_GROUP}" /certs{,/ca}
 chmod 2775 /certs{,/ca}
 
 # apache2 permission changes
-chown -R "${NONROOT_UID}":"${NONROOT_GID}" /etc/apache2
-chown -R "${NONROOT_UID}":"${NONROOT_GID}" /run
+chown -R "${IRONIC_USER}":"${IRONIC_GROUP}" /etc/apache2
+chown -R "${IRONIC_USER}":"${IRONIC_GROUP}" /run
 
 # ironic and httpd related changes
 mkdir -p /etc/httpd/conf.d
-chown -R "${NONROOT_UID}":"${NONROOT_GID}" /etc/ironic /etc/httpd /etc/httpd
-chown -R "${NONROOT_UID}":"${NONROOT_GID}" /var/log
+chown -R "${IRONIC_USER}":"${IRONIC_GROUP}" /etc/ironic /etc/httpd/conf /etc/httpd/conf.d
 chmod 2775 /etc/ironic /etc/httpd/conf /etc/httpd/conf.d
-chmod 664 /etc/ironic/* /etc/httpd/conf/* /etc/httpd/conf.d/*
+#chmod 664 /etc/ironic/* /etc/httpd/conf/* /etc/httpd/conf.d/*
+chmod 664 /etc/ironic/* /etc/httpd/conf/*
 
-chown -R "${NONROOT_UID}":"${NONROOT_GID}" /var/lib/ironic
+chown -R "${IRONIC_USER}":"${IRONIC_GROUP}" /var/lib/ironic
+chmod 2775 /var/lib/ironic
 chmod 664 /var/lib/ironic/ironic.sqlite
 
 # dnsmasq, and the capabilities required to run it as non-root user
-chown -R "${NONROOT_UID}":"${NONROOT_GID}" /etc/dnsmasq.conf /var/lib/dnsmasq
-chmod 2775 /var/lib/dnsmasq
-touch /var/lib/dnsmasq/dnsmasq.leases
-chmod 664 /etc/dnsmasq.conf /var/lib/dnsmasq/dnsmasq.leases
+chown -R "${IRONIC_USER}":"${IRONIC_GROUP}" /etc/dnsmasq.conf
+#handled at chart level
+#setcap "cap_net_raw,cap_net_admin,cap_net_bind_service=+eip" /usr/sbin/dnsmasq
 
 # ca-certificates permission changes
 touch /var/lib/ca-certificates/ca-bundle.pem.new
-chown -R "${NONROOT_UID}":"${NONROOT_GID}" /var/lib/ca-certificates/
+chown -R "${IRONIC_USER}":"${IRONIC_GROUP}" /var/lib/ca-certificates/
 chmod -R +w /var/lib/ca-certificates/
 
 # probes that are created before start
 touch /bin/ironic-{readi,live}ness
-chown root:"${NONROOT_GID}" /bin/ironic-{readi,live}ness
+chown root:"${IRONIC_GROUP}" /bin/ironic-{readi,live}ness
 chmod 775 /bin/ironic-{readi,live}ness